{"pageNumber":"887","pageRowStart":"22150","pageSize":"25","recordCount":46885,"records":[{"id":70031085,"text":"70031085 - 2007 - Revisiting the cape cod bacteria injection experiment using a stochastic modeling approach","interactions":[],"lastModifiedDate":"2018-10-17T11:32:08","indexId":"70031085","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Revisiting the cape cod bacteria injection experiment using a stochastic modeling approach","docAbstract":"

Bromide and resting-cell bacteria tracer tests conducted in a sandy aquifer at the U.S. Geological Survey Cape Cod site in 1987 were reinterpreted using a three-dimensional stochastic approach. Bacteria transport was coupled to colloid filtration theory through functional dependence of local-scale colloid transport parameters upon hydraulic conductivity and seepage velocity in a stochastic advection - dispersion/attachment - detachment model. Geostatistical information on the hydraulic conductivity (K) field that was unavailable at the time of the original test was utilized as input. Using geostatistical parameters, a groundwater flow and particle-tracking model of conservative solute transport was calibrated to the bromide-tracer breakthrough data. An optimization routine was employed over 100 realizations to adjust the mean and variance ofthe natural-logarithm of hydraulic conductivity (InK) field to achieve best fit of a simulated, average bromide breakthrough curve. A stochastic particle-tracking model for the bacteria was run without adjustments to the local-scale colloid transport parameters. Good predictions of mean bacteria breakthrough were achieved using several approaches for modeling components of the system. Simulations incorporating the recent Tufenkji and Elimelech (Environ. Sci. Technol. 2004, 38, 529-536) correlation equation for estimating single collector efficiency were compared to those using the older Rajagopalan and Tien (AIChE J. 1976, 22, 523-533) model. Both appeared to work equally well at predicting mean bacteria breakthrough using a constant mean bacteria diameter for this set of field conditions. Simulations using a distribution of bacterial cell diameters available from original field notes yielded a slight improvement in the model and data agreement compared to simulations using an average bacterial diameter. The stochastic approach based on estimates of local-scale parameters for the bacteria-transport process reasonably captured the mean bacteria transport behavior and calculated an envelope of uncertainty that bracketed the observations in most simulation cases.

","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Science and Technology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Chemical Society","doi":"10.1021/es062693a","issn":"0013936X","usgsCitation":"Maxwell, R.M., Welty, C., and Harvey, R.W., 2007, Revisiting the cape cod bacteria injection experiment using a stochastic modeling approach: Environmental Science & Technology, v. 41, no. 15, p. 5548-5558, https://doi.org/10.1021/es062693a.","productDescription":"11 p.","startPage":"5548","endPage":"5558","numberOfPages":"11","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":486982,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://figshare.com/articles/journal_contribution/Revisiting_the_Cape_Cod_Bacteria_Injection_Experiment_Using_a_Stochastic_Modeling_Approach/2993503","text":"External Repository"},{"id":239045,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211703,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es062693a"}],"country":"United States","state":"Massachusetts","otherGeospatial":"Cape Cod","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -70.69427490234375,\n 41.509605687197975\n ],\n [\n -70.69427490234375,\n 42.10943017110108\n ],\n [\n -69.90463256835938,\n 42.10943017110108\n ],\n [\n -69.90463256835938,\n 41.509605687197975\n ],\n [\n -70.69427490234375,\n 41.509605687197975\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"41","issue":"15","noUsgsAuthors":false,"publicationDate":"2007-06-30","publicationStatus":"PW","scienceBaseUri":"505aad2de4b0c8380cd86e4e","contributors":{"authors":[{"text":"Maxwell, Reed M.","contributorId":95373,"corporation":false,"usgs":true,"family":"Maxwell","given":"Reed","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":429956,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Welty, Claire","contributorId":39416,"corporation":false,"usgs":true,"family":"Welty","given":"Claire","email":"","affiliations":[],"preferred":false,"id":429957,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Harvey, Ronald W. 0000-0002-2791-8503 rwharvey@usgs.gov","orcid":"https://orcid.org/0000-0002-2791-8503","contributorId":564,"corporation":false,"usgs":true,"family":"Harvey","given":"Ronald","email":"rwharvey@usgs.gov","middleInitial":"W.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":429955,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031064,"text":"70031064 - 2007 - Prediction of lethal/effective concentration/dose in the presence of multiple auxiliary covariates and components of variance","interactions":[],"lastModifiedDate":"2012-03-12T17:21:16","indexId":"70031064","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Prediction of lethal/effective concentration/dose in the presence of multiple auxiliary covariates and components of variance","docAbstract":"Predictors of the percentile lethal/effective concentration/dose are commonly used measures of efficacy and toxicity. Typically such quantal-response predictors (e.g., the exposure required to kill 50% of some population) are estimated from simple bioassays wherein organisms are exposed to a gradient of several concentrations of a single agent. The toxicity of an agent may be influenced by auxiliary covariates, however, and more complicated experimental designs may introduce multiple variance components. Prediction methods lag examples of those cases. A conventional two-stage approach consists of multiple bivariate predictions of, say, medial lethal concentration followed by regression of those predictions on the auxiliary covariates. We propose a more effective and parsimonious class of generalized nonlinear mixed-effects models for prediction of lethal/effective dose/concentration from auxiliary covariates. We demonstrate examples using data from a study regarding the effects of pH and additions of variable quantities 2???,5???-dichloro-4???- nitrosalicylanilide (niclosamide) on the toxicity of 3-trifluoromethyl-4- nitrophenol to larval sea lamprey (Petromyzon marinus). The new models yielded unbiased predictions and root-mean-squared errors (RMSEs) of prediction for the exposure required to kill 50 and 99.9% of some population that were 29 to 82% smaller, respectively, than those from the conventional two-stage procedure. The model class is flexible and easily implemented using commonly available software. ?? 2007 SETAC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Toxicology and Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1897/06-630R.1","issn":"07307268","usgsCitation":"Gutreuter, S., and Boogaard, M., 2007, Prediction of lethal/effective concentration/dose in the presence of multiple auxiliary covariates and components of variance: Environmental Toxicology and Chemistry, v. 26, no. 9, p. 1978-1986, https://doi.org/10.1897/06-630R.1.","startPage":"1978","endPage":"1986","numberOfPages":"9","costCenters":[],"links":[{"id":211453,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/06-630R.1"},{"id":238744,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"9","noUsgsAuthors":false,"publicationDate":"2007-09-01","publicationStatus":"PW","scienceBaseUri":"505a81efe4b0c8380cd7b7f1","contributors":{"authors":[{"text":"Gutreuter, S.","contributorId":79829,"corporation":false,"usgs":true,"family":"Gutreuter","given":"S.","email":"","affiliations":[],"preferred":false,"id":429887,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boogaard, M.A.","contributorId":92994,"corporation":false,"usgs":true,"family":"Boogaard","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":429888,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70030900,"text":"70030900 - 2007 - How was the Triassic Songpan-Ganzi basin filled? A provenance study","interactions":[],"lastModifiedDate":"2023-07-28T11:16:34.754392","indexId":"70030900","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3524,"text":"Tectonics","active":true,"publicationSubtype":{"id":10}},"title":"How was the Triassic Songpan-Ganzi basin filled? A provenance study","docAbstract":"

The Triassic Songpan-Ganzi complex comprises >200,000 km2 of 5-15 km thick turbiditic sediments. Although surrounded by several magmatic and orogenic belts, the Triassic high- and ultrahigh-pressure Qinling-Tongbai-Hong'an-Dabie (QTHD) orogen, located several hundred kilometers to the east, was proposed as its major source. Middle to Late Triassic samples from the northern and southern Songpan-Ganzi complex, studied using detrital white mica 40Ar/39Ar ages, Si-in-white mica content, and detrital zircon U/Pb ages, suggest that the northern Songpan-Ganzi deposystem obtained detritus from the north: the north China block, east Kunlun, northern Qaidam, Qilian, and western Qinling; the southern Songpan-Ganzi deposystem was supplied from the northeasterly located Paleozoic QTHD area throughout the Ladinian and received detritus from the Triassic Hong'an-Dabie orogen during the Carnian, indicative of exhumation of the orogen at that time. The QTHD orogen fed the Norian samples in the southeastern southern Songpan-Ganzi deposystem, signifying long drainage channels along the western margin of the south China block. An additional supply from the Emeishan magmatic province and/or the Yidun arc is suggested by the paucity of white mica in the southern Songpan-Ganzi deposystem. Mica ages of Rhaetian sediments from the northwestern Sichuan basin best correlate with those of the Triassic QTHD orogen. Our Si-in-white mica data demonstrate that the high- and ultrahigh-pressure rocks of the Hong'an-Dabie Shan were not exposed in the Middle to Late Triassic. 

","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006TC002078","issn":"02787407","usgsCitation":"Enkelmann, E., Weislogel, A., Ratschbacher, L., Eide, E., Renno, A., and Wooden, J., 2007, How was the Triassic Songpan-Ganzi basin filled? A provenance study: Tectonics, v. 26, no. 4, TC4007, 24 p., https://doi.org/10.1029/2006TC002078.","productDescription":"TC4007, 24 p.","costCenters":[],"links":[{"id":477078,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006tc002078","text":"Publisher Index Page"},{"id":238702,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-07-20","publicationStatus":"PW","scienceBaseUri":"505a326be4b0c8380cd5e7b5","contributors":{"authors":[{"text":"Enkelmann, E.","contributorId":27256,"corporation":false,"usgs":true,"family":"Enkelmann","given":"E.","affiliations":[],"preferred":false,"id":429139,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Weislogel, A.","contributorId":7081,"corporation":false,"usgs":true,"family":"Weislogel","given":"A.","email":"","affiliations":[],"preferred":false,"id":429137,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ratschbacher, L.","contributorId":49154,"corporation":false,"usgs":true,"family":"Ratschbacher","given":"L.","affiliations":[],"preferred":false,"id":429140,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Eide, E.","contributorId":60848,"corporation":false,"usgs":true,"family":"Eide","given":"E.","email":"","affiliations":[],"preferred":false,"id":429141,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Renno, A.","contributorId":79287,"corporation":false,"usgs":true,"family":"Renno","given":"A.","email":"","affiliations":[],"preferred":false,"id":429142,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Wooden, J.","contributorId":21736,"corporation":false,"usgs":true,"family":"Wooden","given":"J.","affiliations":[],"preferred":false,"id":429138,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70031311,"text":"70031311 - 2007 - Predicting wetland plant community responses to proposed water-level-regulation plans for Lake Ontario: GIS-based modeling","interactions":[],"lastModifiedDate":"2016-04-28T13:47:36","indexId":"70031311","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2330,"text":"Journal of Great Lakes Research","active":true,"publicationSubtype":{"id":10}},"title":"Predicting wetland plant community responses to proposed water-level-regulation plans for Lake Ontario: GIS-based modeling","docAbstract":"

Integrated, GIS-based, wetland predictive models were constructed to assist in predicting the responses of wetland plant communities to proposed new water-level regulation plans for Lake Ontario. The modeling exercise consisted of four major components: 1) building individual site wetland geometric models; 2) constructing generalized wetland geometric models representing specific types of wetlands (rectangle model for drowned river mouth wetlands, half ring model for open embayment wetlands, half ellipse model for protected embayment wetlands, and ellipse model for barrier beach wetlands); 3) assigning wetland plant profiles to the generalized wetland geometric models that identify associations between past flooding / dewatering events and the regulated water-level changes of a proposed water-level-regulation plan; and 4) predicting relevant proportions of wetland plant communities and the time durations during which they would be affected under proposed regulation plans. Based on this conceptual foundation, the predictive models were constructed using bathymetric and topographic wetland models and technical procedures operating on the platform of ArcGIS. An example of the model processes and outputs for the drowned river mouth wetland model using a test regulation plan illustrates the four components and, when compared against other test regulation plans, provided results that met ecological expectations. The model results were also compared to independent data collected by photointerpretation. Although data collections were not directly comparable, the predicted extent of meadow marsh in years in which photographs were taken was significantly correlated with extent of mapped meadow marsh in all but barrier beach wetlands. The predictive model for wetland plant communities provided valuable input into International Joint Commission deliberations on new regulation plans and was also incorporated into faunal predictive models used for that purpose.

","language":"English","publisher":"International Association for Great Lakes Research","doi":"10.3394/0380-1330(2007)33[751:PWPCRT]2.0.CO;2","issn":"03801330","usgsCitation":"Wilcox, D., and Xie, Y., 2007, Predicting wetland plant community responses to proposed water-level-regulation plans for Lake Ontario: GIS-based modeling: Journal of Great Lakes Research, v. 33, no. 4, p. 751-773, https://doi.org/10.3394/0380-1330(2007)33[751:PWPCRT]2.0.CO;2.","productDescription":"23 p.","startPage":"751","endPage":"773","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":477141,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://hdl.handle.net/20.500.12648/2290","text":"External Repository"},{"id":239951,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212461,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3394/0380-1330(2007)33[751:PWPCRT]2.0.CO;2"}],"volume":"33","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a81e1e4b0c8380cd7b7a3","contributors":{"authors":[{"text":"Wilcox, D.A.","contributorId":55382,"corporation":false,"usgs":true,"family":"Wilcox","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":430995,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Xie, Y.","contributorId":107917,"corporation":false,"usgs":true,"family":"Xie","given":"Y.","email":"","affiliations":[],"preferred":false,"id":430996,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031076,"text":"70031076 - 2007 - Using pebble lithology and roundness to interpret gravel provenance in piedmont fluvial systems of the Rocky Mountains, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:16","indexId":"70031076","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3368,"text":"Sedimentary Geology","active":true,"publicationSubtype":{"id":10}},"title":"Using pebble lithology and roundness to interpret gravel provenance in piedmont fluvial systems of the Rocky Mountains, USA","docAbstract":"Clast populations in piedmont fluvial systems are products of complex histories that complicate provenance interpretation. Although pebble counts of lithology are widely used, the information provided by a pebble count has been filtered by a potentially large number of processes and circumstances. Counts of pebble lithology and roundness together offer more power than lithology alone for the interpretation of provenance. In this study we analyze pebble counts of lithology and roundness in two contrasting fluvial systems of Pleistocene age to see how provenance varies with drainage size. The two systems are 1) a group of small high-gradient incised streams that formed alluvial fans and terraces and 2) a piedmont river that formed terraces in response to climate-driven cycles of aggradation and incision. We first analyze the data from these systems within their geographic and geologic context. After this is done, we employ contingency table analysis to complete the interpretation of pebble provenance. Small tributary streams that drain rugged mountains on both sides of the Santa Cruz River, southeast Arizona, deposited gravel in fan and terrace deposits of Pleistocene age. Volcanic, plutonic and, to a lesser extent, sedimentary rocks are the predominant pebble lithologies. Large contrasts in gravel lithology are evident among adjacent fans. Subangular to subrounded pebbles predominate. Contingency table analysis shows that hard volcanic rocks tend to remain angular and, even though transport distances have been short, soft tuff and sedimentary rocks tend to become rounded. The Wind River, a major piedmont stream in Wyoming, drains rugged mountains surrounding the northwest part of the Wind River basin. Under the influence of climate change and glaciation during the Pleistocene, the river deposited an extensive series of terrace gravels. In contrast to Santa Cruz tributary gravel, most of the Wind River gravel is relatively homogenous in lithology and is rounded to well-rounded. Detailed analysis reveals a multitude of sources in the headwaters and the basin itself, but lithologies from these sources are combined downstream. Well-rounded volcanic and recycled quartzite clasts were derived from the headwaters. Precambrian igneous and metamorphic clasts were brought down tributary valleys to the Wind River by glaciers, and sandstone was added where the river enters the Wind River structural basin.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Sedimentary Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.sedgeo.2007.02.006","issn":"00370738","usgsCitation":"Lindsey, D.A., Langer, W.H., and Van Gosen, B.S., 2007, Using pebble lithology and roundness to interpret gravel provenance in piedmont fluvial systems of the Rocky Mountains, USA: Sedimentary Geology, v. 199, no. 3-4, p. 223-232, https://doi.org/10.1016/j.sedgeo.2007.02.006.","startPage":"223","endPage":"232","numberOfPages":"10","costCenters":[],"links":[{"id":238908,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211594,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.sedgeo.2007.02.006"}],"volume":"199","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc08ee4b08c986b32a1c3","contributors":{"authors":[{"text":"Lindsey, D. A.","contributorId":49814,"corporation":false,"usgs":true,"family":"Lindsey","given":"D.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":429927,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Langer, W. H.","contributorId":44932,"corporation":false,"usgs":true,"family":"Langer","given":"W.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":429926,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Van Gosen, B. S. 0000-0003-4214-3811","orcid":"https://orcid.org/0000-0003-4214-3811","contributorId":97907,"corporation":false,"usgs":true,"family":"Van Gosen","given":"B.","middleInitial":"S.","affiliations":[],"preferred":false,"id":429928,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70030070,"text":"70030070 - 2007 - Biodegradation of PAHs and PCBs in soils and sludges","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70030070","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3728,"text":"Water, Air, & Soil Pollution","onlineIssn":"1573-2932","printIssn":"0049-6979","active":true,"publicationSubtype":{"id":10}},"title":"Biodegradation of PAHs and PCBs in soils and sludges","docAbstract":"Results from a multi-year, pilot-scale land treatment project for PAHs and PCBs biodegradation were evaluated. A mathematical model, capable of describing sorption, sequestration, and biodegradation in soil/water systems, is applied to interpret the efficacy of a sequential active-passive biotreatment process of organic chemicals on remediation sites. To account for the recalcitrance of PAHs and PCBs in soils and sludges during long-term biotreatment, this model comprises a kinetic equation for organic chemical intraparticle sequestration process. Model responses were verified by comparison to measurements of biodegradation of PAHs and PCBs in land treatment units; a favorable match was found between them. Model simulations were performed to predict on-going biodegradation behavior of PAHs and PCBs in land treatment units. Simulation results indicate that complete biostabilization will be achieved when the concentration of reversibly sorbed chemical (S RA) reduces to undetectable levels, with a certain amount of irreversibly sequestrated residual chemical (S IA) remaining within the soil particle solid phase. The residual fraction (S IA) tends to lose its original chemical and biological activity, and hence, is much less available, toxic, and mobile than the \"free\" compounds. Therefore, little or no PAHs and PCBs will leach from the treatment site and constitutes no threat to human health or the environment. Biotreatment of PAHs and PCBs can be terminated accordingly. Results from the pilot-scale testing data and model calculations also suggest that a significant fraction (10-30%) of high-molecular-weight PAHs and PCBs could be sequestrated and become unavailable for biodegradation. Bioavailability (large K d , i.e., slow desorption rate) is the key factor limiting the PAHs degradation. However, both bioavailability and bioactivity (K in Monod kinetics, i.e., number of microbes, nutrients, and electron acceptor, etc.) regulate PCBs biodegradation. The sequential active-passive biotreatment can be a cost-effective approach for remediation of highly hydrophobic organic contaminants. The mathematical model proposed here would be useful in the design and operation of such organic chemical biodegradation processes on remediation sites. ?? 2007 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Water, Air, and Soil Pollution","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11270-006-9299-3","issn":"00496979","usgsCitation":"Liu, L., Tindall, J., and Friedel, M., 2007, Biodegradation of PAHs and PCBs in soils and sludges: Water, Air, & Soil Pollution, v. 181, no. 1-4, p. 281-296, https://doi.org/10.1007/s11270-006-9299-3.","startPage":"281","endPage":"296","numberOfPages":"16","costCenters":[],"links":[{"id":212727,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11270-006-9299-3"},{"id":240259,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"181","issue":"1-4","noUsgsAuthors":false,"publicationDate":"2007-02-17","publicationStatus":"PW","scienceBaseUri":"5059f146e4b0c8380cd4ab4e","contributors":{"authors":[{"text":"Liu, L.","contributorId":18481,"corporation":false,"usgs":true,"family":"Liu","given":"L.","email":"","affiliations":[],"preferred":false,"id":425595,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tindall, J.A.","contributorId":25711,"corporation":false,"usgs":true,"family":"Tindall","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":425596,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Friedel, M.J.","contributorId":90823,"corporation":false,"usgs":true,"family":"Friedel","given":"M.J.","email":"","affiliations":[],"preferred":false,"id":425597,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70030812,"text":"70030812 - 2007 - Physical and hormonal examination of Missouri River shovelnose sturgeon reproductive stage: A reference guide","interactions":[],"lastModifiedDate":"2017-05-23T13:04:10","indexId":"70030812","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2166,"text":"Journal of Applied Ichthyology","active":true,"publicationSubtype":{"id":10}},"title":"Physical and hormonal examination of Missouri River shovelnose sturgeon reproductive stage: A reference guide","docAbstract":"

From May 2001 to June 2002 Wildhaber et al. (2005) conducted monthly sampling of Lower Missouri River shovelnose sturgeon (Scaphirhynchus platorynchus) to develop methods for determination of sex and the reproductive stage of sturgeons in the field. Shovelnose sturgeon were collected from the Missouri River and ultrasonic and endoscopic imagery and blood and gonadal tissue samples were taken. The full set of data was used to develop monthly reproductive stage profiles for S. platorynchus that could be compared to data collected on pallid sturgeon (Scaphirhynchus albus). This paper presents a comprehensive reference set of images, sex steroids, and vitellogenin (VTG, an egg protein precursor) data for assessing shovelnose sturgeon sex and reproductive stage. This reference set includes ultrasonic, endoscopic, histologic, and internal images of male and female gonads of shovelnose sturgeon at each reproductive stage along with complementary data on average 17-β estradiol, 11-ketotestosterone, VTG, gonadosomatic index, and polarization index.

","language":"English","publisher":"Wiley","doi":"10.1111/j.1439-0426.2007.00878.x","issn":"01758659","usgsCitation":"Wildhaber, M., Papoulias, D., DeLonay, A., Tillitt, D.E., Bryan, J., and Annis, M., 2007, Physical and hormonal examination of Missouri River shovelnose sturgeon reproductive stage: A reference guide: Journal of Applied Ichthyology, v. 23, no. 4, p. 382-401, https://doi.org/10.1111/j.1439-0426.2007.00878.x.","productDescription":"20 p.","startPage":"382","endPage":"401","numberOfPages":"20","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"links":[{"id":477046,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1439-0426.2007.00878.x","text":"Publisher Index Page"},{"id":238925,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211608,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1439-0426.2007.00878.x"}],"country":"United States","state":"Missouri","otherGeospatial":"Missouri River","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -93.07617187499999,\n 39.436192999314095\n ],\n [\n -93.18603515624999,\n 39.35553794109382\n ],\n [\n -92.9608154296875,\n 39.22799807055236\n ],\n [\n -92.9718017578125,\n 38.98503278695909\n ],\n [\n -92.74658203125,\n 38.91240739487225\n ],\n [\n -92.625732421875,\n 38.91668153637508\n ],\n [\n -92.6312255859375,\n 39.00637903337458\n ],\n [\n -92.845458984375,\n 39.104488809440475\n ],\n [\n -92.7630615234375,\n 39.279041894366785\n ],\n [\n -92.9937744140625,\n 39.41073305508498\n ],\n [\n -93.07617187499999,\n 39.436192999314095\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"23","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7a88e4b0c8380cd78f68","contributors":{"authors":[{"text":"Wildhaber, M. L. 0000-0002-6538-9083","orcid":"https://orcid.org/0000-0002-6538-9083","contributorId":62961,"corporation":false,"usgs":true,"family":"Wildhaber","given":"M. L.","affiliations":[],"preferred":false,"id":428793,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Papoulias, D. M. 0000-0002-5106-2469","orcid":"https://orcid.org/0000-0002-5106-2469","contributorId":58759,"corporation":false,"usgs":true,"family":"Papoulias","given":"D. M.","affiliations":[],"preferred":false,"id":428792,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"DeLonay, A. J. 0000-0002-3752-2799","orcid":"https://orcid.org/0000-0002-3752-2799","contributorId":34246,"corporation":false,"usgs":true,"family":"DeLonay","given":"A. J.","affiliations":[],"preferred":false,"id":428790,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Tillitt, D. E.","contributorId":83462,"corporation":false,"usgs":true,"family":"Tillitt","given":"D.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":428794,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bryan, J.L.","contributorId":15328,"corporation":false,"usgs":true,"family":"Bryan","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":428789,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Annis, M.L.","contributorId":53930,"corporation":false,"usgs":true,"family":"Annis","given":"M.L.","email":"","affiliations":[],"preferred":false,"id":428791,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70030844,"text":"70030844 - 2007 - Mid-Pliocene planktic foraminifer assemblage of the North Atlantic Ocean","interactions":[],"lastModifiedDate":"2013-02-27T15:26:37","indexId":"70030844","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2735,"text":"Micropaleontology","active":true,"publicationSubtype":{"id":10}},"title":"Mid-Pliocene planktic foraminifer assemblage of the North Atlantic Ocean","docAbstract":"The US Geological Survey Pliocene Research, Interpretation and Synoptic Mapping (PRISM) North Atlantic faunal data set provides a unique, temporally constrained perspective to document and evaluate the quantitative geographic distribution of key mid-Pliocene taxa. Planktic foraminifer census data from within the PRISM time slab (3.29 to 2.97 Ma) at thirteen sites in the North Atlantic Ocean have been analyzed. We have compiled Scanning Electron Micrographs for an atlas of mid-Pliocene assemblages from the North Atlantic with descriptions of each taxon to document the taxonomic concepts that accompany the PRISM data. In mid-Pliocene assemblages, the geographic distributions of extant taxa are similar to their present day distributions, although some are extended to the north. We use the distribution of extinct taxa to assess previous assumptions regarding environmental preferences.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Micropaleontology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"GeoScienceWorld","doi":"10.2113/gsmicropal.53.1-2.105","issn":"00262803","usgsCitation":"Dowsett, H., and Robinson, M., 2007, Mid-Pliocene planktic foraminifer assemblage of the North Atlantic Ocean: Micropaleontology, v. 53, no. 1-2, p. 105-126, https://doi.org/10.2113/gsmicropal.53.1-2.105.","startPage":"105","endPage":"126","numberOfPages":"22","costCenters":[],"links":[{"id":238895,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":268485,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gsmicropal.53.1-2.105"}],"volume":"53","issue":"1-2","noUsgsAuthors":false,"publicationDate":"2009-06-05","publicationStatus":"PW","scienceBaseUri":"505a56c1e4b0c8380cd6d7de","contributors":{"authors":[{"text":"Dowsett, H.J. 0000-0003-1983-7524","orcid":"https://orcid.org/0000-0003-1983-7524","contributorId":87924,"corporation":false,"usgs":true,"family":"Dowsett","given":"H.J.","affiliations":[],"preferred":false,"id":428911,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Robinson, M.M.","contributorId":56263,"corporation":false,"usgs":true,"family":"Robinson","given":"M.M.","email":"","affiliations":[],"preferred":false,"id":428910,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70032920,"text":"70032920 - 2007 - Influences of wildfire and channel reorganization on spatial and temporal variation in stream temperature and the distribution of fish and amphibians","interactions":[],"lastModifiedDate":"2017-11-15T13:27:24","indexId":"70032920","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1478,"text":"Ecosystems","active":true,"publicationSubtype":{"id":10}},"title":"Influences of wildfire and channel reorganization on spatial and temporal variation in stream temperature and the distribution of fish and amphibians","docAbstract":"Wildfire can influence a variety of stream ecosystem properties. We studied stream temperatures in relation to wildfire in small streams in the Boise River Basin, located in central Idaho, USA. To examine the spatio-temporal aspects of temperature in relation to wildfire, we employed three approaches: a pre-post fire comparison of temperatures between two sites (one from a burned stream and one unburned) over 13 years, a short-term (3 year) pre-post fire comparison of a burned and unburned stream with spatially extensive data, and a short-term (1 year) comparative study of spatial variability in temperatures using a \"space for time\" substitutive design across 90 sites in nine streams (retrospective comparative study). The latter design included streams with a history of stand-replacing wildfire and streams with severe post-fire reorganization of channels due to debris flows and flooding. Results from these three studies indicated that summer maximum water temperatures can remain significantly elevated for at least a decade following wildfire, particularly in streams with severe channel reorganization. In the retrospective comparative study we investigated occurrence of native rainbow trout (Oncorhynchus mykiss) and tailed frog larvae (Ascaphus montanus) in relation to maximum stream temperatures during summer. Both occurred in nearly every site sampled, but tailed frog larvae were found in much warmer water than previously reported in the field (26.6??C maximum summer temperature). Our results show that physical stream habitats can remain altered (for example, increased temperature) for many years following wildfire, but that native aquatic vertebrates can be resilient. In a management context, this suggests wildfire may be less of a threat to native species than human influences that alter the capacity of stream-living vertebrates to persist in the face of natural disturbance. ?? 2007 Springer Science+Business Media, LLC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecosystems","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10021-007-9029-8","issn":"14329840","usgsCitation":"Dunham, J., Rosenberger, A., Luce, C., and Rieman, B., 2007, Influences of wildfire and channel reorganization on spatial and temporal variation in stream temperature and the distribution of fish and amphibians: Ecosystems, v. 10, no. 2, p. 335-346, https://doi.org/10.1007/s10021-007-9029-8.","startPage":"335","endPage":"346","numberOfPages":"12","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":240805,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213202,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10021-007-9029-8"}],"volume":"10","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-04-13","publicationStatus":"PW","scienceBaseUri":"505a3baee4b0c8380cd6275b","contributors":{"authors":[{"text":"Dunham, J. B. 0000-0002-6268-0633","orcid":"https://orcid.org/0000-0002-6268-0633","contributorId":96637,"corporation":false,"usgs":true,"family":"Dunham","given":"J. B.","affiliations":[],"preferred":false,"id":438531,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rosenberger, A.E.","contributorId":98526,"corporation":false,"usgs":true,"family":"Rosenberger","given":"A.E.","email":"","affiliations":[],"preferred":false,"id":438532,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Luce, C.H.","contributorId":81057,"corporation":false,"usgs":true,"family":"Luce","given":"C.H.","email":"","affiliations":[],"preferred":false,"id":438530,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rieman, B.E.","contributorId":67283,"corporation":false,"usgs":true,"family":"Rieman","given":"B.E.","email":"","affiliations":[],"preferred":false,"id":438529,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70032922,"text":"70032922 - 2007 - Evaluation of the status of anurans on a refuge in suburban Maryland","interactions":[],"lastModifiedDate":"2012-03-12T17:21:37","indexId":"70032922","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2334,"text":"Journal of Herpetology","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of the status of anurans on a refuge in suburban Maryland","docAbstract":"Because many anurans have well-defined breeding seasons and male anurans produce loud advertisement calls, surveys of these breeding choruses are believed to provide a dependable means of monitoring population trends. The Patuxent Research Refuge initiated such a calling survey in the spring of 1997, which uses volunteers to collect anuran (frog and toad) calling survey data. The primary goal of initiating the calling surveys at the Patuxent Refuge was to obtain baseline information on anuran populations, such as species occurrence, frequency of occurrence, and relative abundance over time. In this paper, we used the calling survey data to develop models for the \"proportion of area occupied\" by individual anuran species, a method in which analysis is focused on the proportion of sites that are occupied by a species, instead of the number of individuals present in the population. This type of analysis is ideal for use in large-scale monitoring programs focused on species that are difficult to count, such as anurans or birds. We considered models for proportion of area occupied that allow for imperfect detection (that is, a species may be present but go undetected during sampling) by incorporating parameters that describe detection probability and the response of detection probability to various environmental and sampling covariates. Our results indicate that anuran populations on the Patuxent Research Refuge have high rates of occupancy compared to areas nearby and that extinction and colonization rates are stable. The potential uses for \"proportion of area occupied\" analyses are far-reaching and will allow for more accurate quantification of data and better-informed management decisions for calling surveys on a larger scale. Copyright 2007 Society for the Study of Amphibians and Reptiles.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Herpetology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1670/0022-1511(2007)41[52:EOTSOA]2.0.CO;2","issn":"00221511","usgsCitation":"Brander, S., Royle, J., and Eames, M., 2007, Evaluation of the status of anurans on a refuge in suburban Maryland: Journal of Herpetology, v. 41, no. 1, p. 52-60, https://doi.org/10.1670/0022-1511(2007)41[52:EOTSOA]2.0.CO;2.","startPage":"52","endPage":"60","numberOfPages":"9","costCenters":[],"links":[{"id":213231,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1670/0022-1511(2007)41[52:EOTSOA]2.0.CO;2"},{"id":240836,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0cf4e4b0c8380cd52d71","contributors":{"authors":[{"text":"Brander, S.M.","contributorId":45431,"corporation":false,"usgs":true,"family":"Brander","given":"S.M.","email":"","affiliations":[],"preferred":false,"id":438536,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Royle, J. Andrew 0000-0003-3135-2167","orcid":"https://orcid.org/0000-0003-3135-2167","contributorId":96221,"corporation":false,"usgs":true,"family":"Royle","given":"J. Andrew","affiliations":[],"preferred":false,"id":438538,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Eames, M.","contributorId":70094,"corporation":false,"usgs":true,"family":"Eames","given":"M.","email":"","affiliations":[],"preferred":false,"id":438537,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70032965,"text":"70032965 - 2007 - DIN retention-transport through four hydrologically connected zones in a headwater catchment of the Upper Mississippi River","interactions":[],"lastModifiedDate":"2023-10-06T11:10:47.274618","indexId":"70032965","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"DIN retention-transport through four hydrologically connected zones in a headwater catchment of the Upper Mississippi River","docAbstract":"

Dissolved inorganic nitrogen (DIN) retention-transport through a headwater catchment was synthesized from studies encompassing four distinct hydrologic zones of the Shingobee River Headwaters near the origin of the Mississippi River. The hydrologic zones included: (1) hillslope ground water (ridge to bankside riparian); (2) alluvial riparian ground water; (3) ground water discharged through subchannel sediments (hyporheic zone); and (4) channel surface water. During subsurface hillslope transport through Zone 1, DIN, primarily nitrate, decreased from ∼3 mg-N/l to <0.1 mg-N/l. Ambient seasonal nitrate:chloride ratios in hillslope flow paths indicated both dilution and biotic processing caused nitrate loss. Biologically available organic carbon controlled biotic nitrate retention during hillslope transport. In the alluvial riparian zone (Zone 2) biologically available organic carbon controlled nitrate depletion although processing of both ambient and amended nitrate was faster during the summer than winter. In the hyporheic zone (Zone 3) and stream surface water (Zone 4) DIN retention was primarily controlled by temperature. Perfusion core studies using hyporheic sediment indicated sufficient organic carbon in bed sediments to retain ground water DIN via coupled nitrification-denitrification. Numerical simulations of seasonal hyporheic sediment nitrification-denitrification rates from perfusion cores adequately predicted surface water ammonium but not nitrate when compared to 5 years of monthly field data (1989-93). Mass balance studies in stream surface water indicated proportionally higher summer than winter N retention. Watershed DIN retention was effective during summer under the current land use of intermittently grazed pasture. However, more intensive land use such as row crop agriculture would decrease nitrate retention efficiency and increase loads to surface water. Understanding DIN retention capacity throughout the system, including special channel features such as sloughs, wetlands and floodplains that provide surface water-ground water connectivity, will be required to develop effective nitrate management strategies.

","language":"English","publisher":"Wiley","doi":"10.1111/j.1752-1688.2007.00006.x","issn":"1093474X","usgsCitation":"Triska, F., Duff, J., Sheibley, R., Jackman, A.P., and Avanzino, R., 2007, DIN retention-transport through four hydrologically connected zones in a headwater catchment of the Upper Mississippi River: Journal of the American Water Resources Association, v. 43, no. 1, p. 60-71, https://doi.org/10.1111/j.1752-1688.2007.00006.x.","productDescription":"12 p.","startPage":"60","endPage":"71","numberOfPages":"12","costCenters":[],"links":[{"id":240973,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Minnesota","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -95.77974809354775,\n 47.13470400307929\n ],\n [\n -95.77974809354775,\n 46.74803521522705\n ],\n [\n -95.19434159404256,\n 46.74803521522705\n ],\n [\n -95.19434159404256,\n 47.13470400307929\n ],\n [\n -95.77974809354775,\n 47.13470400307929\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"43","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-26","publicationStatus":"PW","scienceBaseUri":"5059fd49e4b0c8380cd4e745","contributors":{"authors":[{"text":"Triska, F.J.","contributorId":69560,"corporation":false,"usgs":true,"family":"Triska","given":"F.J.","email":"","affiliations":[],"preferred":false,"id":438736,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Duff, J.H.","contributorId":60377,"corporation":false,"usgs":true,"family":"Duff","given":"J.H.","email":"","affiliations":[],"preferred":false,"id":438735,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sheibley, R.W. 0000-0003-1627-8536 sheibley@usgs.gov","orcid":"https://orcid.org/0000-0003-1627-8536","contributorId":43066,"corporation":false,"usgs":true,"family":"Sheibley","given":"R.W.","email":"sheibley@usgs.gov","affiliations":[],"preferred":false,"id":438733,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jackman, A. P.","contributorId":46957,"corporation":false,"usgs":true,"family":"Jackman","given":"A.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":438734,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Avanzino, R.J.","contributorId":37336,"corporation":false,"usgs":true,"family":"Avanzino","given":"R.J.","affiliations":[],"preferred":false,"id":438732,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70029717,"text":"70029717 - 2007 - Latin hypercube approach to estimate uncertainty in ground water vulnerability","interactions":[],"lastModifiedDate":"2012-03-12T17:21:39","indexId":"70029717","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Latin hypercube approach to estimate uncertainty in ground water vulnerability","docAbstract":"A methodology is proposed to quantify prediction uncertainty associated with ground water vulnerability models that were developed through an approach that coupled multivariate logistic regression with a geographic information system (GIS). This method uses Latin hypercube sampling (LHS) to illustrate the propagation of input error and estimate uncertainty associated with the logistic regression predictions of ground water vulnerability. Central to the proposed method is the assumption that prediction uncertainty in ground water vulnerability models is a function of input error propagation from uncertainty in the estimated logistic regression model coefficients (model error) and the values of explanatory variables represented in the GIS (data error). Input probability distributions that represent both model and data error sources of uncertainty were simultaneously sampled using a Latin hypercube approach with logistic regression calculations of probability of elevated nonpoint source contaminants in ground water. The resulting probability distribution represents the prediction intervals and associated uncertainty of the ground water vulnerability predictions. The method is illustrated through a ground water vulnerability assessment of the High Plains regional aquifer. Results of the LHS simulations reveal significant prediction uncertainties that vary spatially across the regional aquifer. Additionally, the proposed method enables a spatial deconstruction of the prediction uncertainty that can lead to improved prediction of ground water vulnerability. ?? 2007 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2006.00298.x","issn":"0017467X","usgsCitation":"Gurdak, J., McCray, J., Thyne, G., and Qi, S., 2007, Latin hypercube approach to estimate uncertainty in ground water vulnerability: Ground Water, v. 45, no. 3, p. 348-361, https://doi.org/10.1111/j.1745-6584.2006.00298.x.","startPage":"348","endPage":"361","numberOfPages":"14","costCenters":[],"links":[{"id":213084,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2006.00298.x"},{"id":240673,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-03-20","publicationStatus":"PW","scienceBaseUri":"505a4580e4b0c8380cd6738a","contributors":{"authors":[{"text":"Gurdak, J.J.","contributorId":35119,"corporation":false,"usgs":true,"family":"Gurdak","given":"J.J.","email":"","affiliations":[],"preferred":false,"id":423983,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McCray, J.E.","contributorId":31985,"corporation":false,"usgs":true,"family":"McCray","given":"J.E.","affiliations":[],"preferred":false,"id":423982,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Thyne, G.","contributorId":20983,"corporation":false,"usgs":true,"family":"Thyne","given":"G.","affiliations":[],"preferred":false,"id":423981,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Qi, S.L.","contributorId":76140,"corporation":false,"usgs":true,"family":"Qi","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":423984,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70031172,"text":"70031172 - 2007 - Estimating fishing mortality, natural mortality, and selectivity using recoveries from tagging young fish","interactions":[],"lastModifiedDate":"2012-03-12T17:21:17","indexId":"70031172","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2886,"text":"North American Journal of Fisheries Management","active":true,"publicationSubtype":{"id":10}},"title":"Estimating fishing mortality, natural mortality, and selectivity using recoveries from tagging young fish","docAbstract":"Current methods for estimation of age- and year-specific instantaneous mortality rates based on multiyear, multiple-age tagging studies assume that it is feasible to tag fish in a wide range of ages. For some species, however, only the youngest one or two age-classes are readily available for tagging. Given the practical advantages of tagging young fish only, an important question is whether such studies would provide the information needed for estimation of age-dependent mortality rates. We investigated three designs: tagging only the youngest available age-class, tagging the two youngest age-classes, and tagging the first five age-classes. We carried out simulation studies to assess estimator performance under these three designs, in each case assuming the same total number of tagged fish. Data were generated assuming fishing mortality rates to be age and year dependent and natural mortality rates to be constant or with limited age dependence. Estimator performance is best when fish are tagged in five age-classes, and tagging fish in the two youngest age-classes shows substantial improvement compared with tagging one age-class only. External information about the tag-reporting rate is necessary to obtain estimators with reasonable properties, especially in the case of models with age-dependent natural mortality. Such information can be obtained from auxiliary studies by means of high-reward tags or planted tags. Collecting recovery information for several additional years after the last release produces small improvements in precision and bias. If tagging fish in multiple age-classes is impractical, reasonable precision can be obtained by tagging one or preferably two age-classes and obtaining supplemental information on the reporting rate. For illustration, estimates of age-dependent fishing and natural mortality rates were obtained from tag returns on Chesapeake Bay striped bass Morone saxatilis tagged at ages 3 and 4 years. ?? Copyright by the American Fisheries Society 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"North American Journal of Fisheries Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/M06-127.1","issn":"02755947","usgsCitation":"Jiang, H., Brownie, C., Hightower, J., and Pollock, K.H., 2007, Estimating fishing mortality, natural mortality, and selectivity using recoveries from tagging young fish: North American Journal of Fisheries Management, v. 27, no. 3, p. 773-781, https://doi.org/10.1577/M06-127.1.","startPage":"773","endPage":"781","numberOfPages":"9","costCenters":[],"links":[{"id":238752,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211460,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/M06-127.1"}],"volume":"27","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-08-01","publicationStatus":"PW","scienceBaseUri":"505a0b1be4b0c8380cd5258e","contributors":{"authors":[{"text":"Jiang, H.","contributorId":83731,"corporation":false,"usgs":true,"family":"Jiang","given":"H.","affiliations":[],"preferred":false,"id":430357,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brownie, C.","contributorId":43463,"corporation":false,"usgs":true,"family":"Brownie","given":"C.","affiliations":[],"preferred":false,"id":430355,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hightower, J.E.","contributorId":16605,"corporation":false,"usgs":true,"family":"Hightower","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":430354,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Pollock, K. H.","contributorId":65184,"corporation":false,"usgs":false,"family":"Pollock","given":"K.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":430356,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70030213,"text":"70030213 - 2007 - Evaluation of grassland dynamics in the northern-tibet plateau of china using remote sensing and climate data","interactions":[],"lastModifiedDate":"2015-10-15T13:40:38","indexId":"70030213","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3380,"text":"Sensors","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of grassland dynamics in the northern-tibet plateau of china using remote sensing and climate data","docAbstract":"

The grassland ecosystem in the Northern-Tibet Plateau (NTP) of China is very sensitive to weather and climate conditions of the region. In this study, we investigate the spatial and temporal variations of the grassland ecosystem in the NTP using the NOAA/AVHRR ten-day maximum NDVI composite data of 1981-2001. The relationships among Vegetation Peak-Normalized Difference Vegetation Index (VP-NDVI) and climate variables were quantified for six counties within the NTP. The notable and uneven alterations of the grassland in response to variation of climate and human impact in the NTP were revealed. Over the last two decades of the 20th century, the maximum greenness of the grassland has exhibited high increase, slight increase, no-change, slight decrease and high decrease, each occupies 0.27%, 8.71%, 77.27%, 13.06% and 0.69% of the total area of the NTP, respectively. A remarkable increase (decrease) in VP-NDVI occurred in the central-eastern (eastern) NTP whereas little change was observed in the western and northwestern NTP. A strong negative relationship between VP-NDVI and ET 0 was found in sub-frigid, semi-arid and frigid- arid regions of the NTP (i.e., Nakchu, Shantsa, Palgon and Amdo counties), suggesting that the ETo is one limiting factor affecting grassland degradation. In the temperate-humid, sub-frigid and sub-humid regions of the NTP (Chali and Sokshan counties), a significant inverse correlation between VP-NDVI and population indicates that human activities have adversely affected the grassland condition as was previously reported in the literature. Results from this research suggest that the alteration and degradation of the grassland in the lower altitude of the NTP over the last two decades of the 20th century are likely caused by variations of climate and anthropogenic activities. ?? 2007 by MDPI.

","language":"English","publisher":"MDPI","doi":"10.3390/s7123312","issn":"14243210","usgsCitation":"Zhang, J., Yao, F., Zheng, L., and Yang, L., 2007, Evaluation of grassland dynamics in the northern-tibet plateau of china using remote sensing and climate data: Sensors, v. 7, no. 12, p. 3312-3328, https://doi.org/10.3390/s7123312.","productDescription":"17 p.","startPage":"3312","endPage":"3328","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":477030,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3390/s7123312","text":"Publisher Index Page"},{"id":239329,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"7","issue":"12","noUsgsAuthors":false,"publicationDate":"2007-12-17","publicationStatus":"PW","scienceBaseUri":"505a0c7ee4b0c8380cd52b8b","contributors":{"authors":[{"text":"Zhang, Jiahua","contributorId":35479,"corporation":false,"usgs":true,"family":"Zhang","given":"Jiahua","email":"","affiliations":[],"preferred":false,"id":426149,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Yao, Fengmei","contributorId":107927,"corporation":false,"usgs":true,"family":"Yao","given":"Fengmei","email":"","affiliations":[],"preferred":false,"id":426151,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zheng, Lingyun","contributorId":68495,"corporation":false,"usgs":true,"family":"Zheng","given":"Lingyun","email":"","affiliations":[],"preferred":false,"id":426150,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Yang, Limin 0000-0002-2843-6944 lyang@usgs.gov","orcid":"https://orcid.org/0000-0002-2843-6944","contributorId":4305,"corporation":false,"usgs":true,"family":"Yang","given":"Limin","email":"lyang@usgs.gov","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":true,"id":426148,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70030923,"text":"70030923 - 2007 - Variation in northern bobwhite demography along two temporal scales","interactions":[],"lastModifiedDate":"2017-12-07T10:59:24","indexId":"70030923","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3103,"text":"Population Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Variation in northern bobwhite demography along two temporal scales","docAbstract":"Quantification and understanding of demographic variation across intra- and inter-annual temporal scales can benefit from the development of theoretical models of evolution and applied conservation of species. We used long-term survey data for northern bobwhites (Colinus virginianus) collected at the northern and southern extent of its geographic range to develop matrix population models which would allow investigation of intra- and inter-annual patterns in bobwhite population dynamics. We first evaluated intra-annual patterns in the importance of a seasonal demographic rate to asymptotic population growth rate with prospective perturbation analysis (elasticity analysis). We then conducted retrospective analysis (life table response experiments) of inter-annual patterns in the contribution of observed changes in demography to the observed change in population growth rate. Survival in the earliest age class during the nonbreeding season had the greatest potential influence in both the northern and southern populations. Examination of inter-annual variation in demography indicated that variation in nonbreeding season survival in the earliest age class contributed the most to observed changes in population growth rate in the northern population. In contrast, changes in fertility in the earliest age class in the southern population had the greatest influence on changes in population growth rate. Prospective elasticity analyses highlight the similarities in bobwhite demography throughout different parts of its geographic range, while retrospective life table response experiments revealed important patterns in the temporal differences of bobwhite life history at the northern and southern extent of its geographic range. ?? 2007 The Society of Population Ecology and Springer.","language":"English","publisher":"Springer","doi":"10.1007/s10144-007-0037-5","issn":"14383896","usgsCitation":"Folk, T., Holmes, R.R., and Grand, J.B., 2007, Variation in northern bobwhite demography along two temporal scales: Population Ecology, v. 49, no. 3, p. 211-219, https://doi.org/10.1007/s10144-007-0037-5.","productDescription":"9 p.","startPage":"211","endPage":"219","numberOfPages":"9","costCenters":[],"links":[{"id":238565,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211296,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10144-007-0037-5"}],"volume":"49","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-02-15","publicationStatus":"PW","scienceBaseUri":"505bc15fe4b08c986b32a542","contributors":{"authors":[{"text":"Folk, T.H.","contributorId":50688,"corporation":false,"usgs":true,"family":"Folk","given":"T.H.","email":"","affiliations":[],"preferred":false,"id":429248,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Holmes, Randall R.","contributorId":201221,"corporation":false,"usgs":false,"family":"Holmes","given":"Randall","email":"","middleInitial":"R.","affiliations":[{"id":13360,"text":"Auburn University","active":true,"usgs":false}],"preferred":false,"id":429249,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Grand, J. Barry 0000-0002-3576-4567 barry_grand@usgs.gov","orcid":"https://orcid.org/0000-0002-3576-4567","contributorId":579,"corporation":false,"usgs":true,"family":"Grand","given":"J.","email":"barry_grand@usgs.gov","middleInitial":"Barry","affiliations":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"preferred":true,"id":429247,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70032731,"text":"70032731 - 2007 - Subaqueous geology and a filling model for Crater Lake, Oregon","interactions":[],"lastModifiedDate":"2019-03-04T11:45:52","indexId":"70032731","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Subaqueous geology and a filling model for Crater Lake, Oregon","docAbstract":"

Results of a detailed bathymetric survey of Crater Lake conducted in 2000, combined with previous results of submersible and dredge sampling, form the basis for a geologic map of the lake floor and a model for the filling of Crater Lake with water. The most prominent landforms beneath the surface of Crater Lake are andesite volcanoes that were active as the lake was filling with water, following caldera collapse during the climactic eruption of Mount Mazama 7700 cal. yr B.P. The Wizard Island volcano is the largest and probably was active longest, ceasing eruptions when the lake was 80 m lower than present. East of Wizard Island is the central platform volcano and related lava flow fields on the caldera floor. Merriam Cone is a symmetrical andesitic volcano that apparently was constructed subaqueously during the same period as the Wizard Island and central platform volcanoes. The youngest postcaldera volcanic feature is a small rhyodacite dome on the east flank of the Wizard Island edifice that dates from 4800 cal. yr B.P. The bathymetry also yields information on bedrock outcrops and talus/debris slopes of the caldera walls. Gravity flows transport sediment from wall sources to the deep basins of the lake. Several debris-avalanche deposits, containing blocks up to 280 m long, are present on the caldera floor and occur below major embayments in the caldera walls. Geothermal phenomena on the lake floor are bacterial mats, pools of solute-rich warm water, and fossil subaqueous hot spring deposits. Lake level is maintained by a balance between precipitation and inflow versus evaporation and leakage. High-resolution bathymetry reveals a series of up to nine drowned beaches in the upper 30 m of the lake that we propose reflect stillstands subsequent to filling of Crater Lake. A prominent wave-cut platform between 4 m depth and present lake level that commonly is up to 40 m wide suggests that the surface of Crater Lake has been at this elevation for a very long time. Lake level apparently is limited by leakage through a permeable layer in the northeast caldera wall. The deepest drowned beach approximately corresponds to the base of the permeable layer. Among a group of lake filling models, our preferred one is constrained by the drowned beaches, the permeable layer in the caldera wall, and paleoclimatic data. We used a precipitation rate 70% of modern as a limiting case. Satisfactory models require leakage to be proportional to elevation and the best fit model has a linear combination of 45% leakage proportional to elevation and 55% of leakage proportional to elevation above the base of the permeable layer. At modern precipitation rates, the lake would have taken 420 yr to fill, or a maximum of 740 yr if precipitation was 70% of the modern value. The filling model provides a chronology for prehistoric passage zones on postcaldera volcanoes that ceased erupting before the lake was filled.

","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-006-0343-5","issn":"00188158","usgsCitation":"Nathenson, M., Bacon, C., and Ramsey, D., 2007, Subaqueous geology and a filling model for Crater Lake, Oregon: Hydrobiologia, v. 574, no. 1, p. 13-27, https://doi.org/10.1007/s10750-006-0343-5.","productDescription":"15 p.","startPage":"13","endPage":"27","numberOfPages":"15","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true},{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"links":[{"id":477074,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://zenodo.org/record/1232804","text":"External Repository"},{"id":241599,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213925,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-0343-5"}],"volume":"574","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9cffe4b08c986b31d59f","contributors":{"authors":[{"text":"Nathenson, M.","contributorId":46632,"corporation":false,"usgs":true,"family":"Nathenson","given":"M.","email":"","affiliations":[],"preferred":false,"id":437663,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bacon, C. R. 0000-0002-2165-5618","orcid":"https://orcid.org/0000-0002-2165-5618","contributorId":21522,"corporation":false,"usgs":true,"family":"Bacon","given":"C. R.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":false,"id":437662,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ramsey, D.W.","contributorId":95219,"corporation":false,"usgs":true,"family":"Ramsey","given":"D.W.","email":"","affiliations":[],"preferred":false,"id":437664,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031376,"text":"70031376 - 2007 - Investigation of the groundwater system at Masaya Caldera, Nicaragua, using transient electromagnetics and numerical simulation","interactions":[],"lastModifiedDate":"2012-03-12T17:21:14","indexId":"70031376","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2499,"text":"Journal of Volcanology and Geothermal Research","active":true,"publicationSubtype":{"id":10}},"title":"Investigation of the groundwater system at Masaya Caldera, Nicaragua, using transient electromagnetics and numerical simulation","docAbstract":"The distribution of groundwater beneath Masaya Volcano, in Nicaragua, and its surrounding caldera was characterized using the transient electromagnetic method (TEM). Multiple soundings were conducted at 30 sites. Models of the TEM data consistently indicate a resistive layer that is underlain by one or more conductive layers. These two layers represent the unsaturated and saturated zones, respectively, with the boundary between them indicating the water-table elevation. A map of the TEM data shows that the water table in the caldera is a subdued replica of the topography, with higher elevations beneath the edifice in the south-central caldera and lower elevations in the eastern caldera, coinciding with the elevation of Laguna de Masaya. These TEM data, combined with regional hydrologic data, indicate that the caldera in hydrologically isolated from the surrounding region, with as much as 60??m of difference in elevation of the groundwater table across caldera-bounding faults. The water-table information and estimates of fluxes of water through the system were used to constrain a numerical simulation of groundwater flow. The simulation results indicate that basalt flows in the outer parts of the caldera have a relatively high transmissivity, whereas the central edifice has a substantially lower transmissivity. A layer of relatively high transmissivity must be present at depth within the edifice in order to deliver the observed flux of water and steam to the active vent. This hydrologic information about the caldera provides a baseline for assessing the response of this isolated groundwater system to future changes in magmatic activity. ?? 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Volcanology and Geothermal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jvolgeores.2007.07.016","issn":"03770273","usgsCitation":"MacNeil, R., Sanford, W., Connor, C., Sandberg, S., and Diez, M., 2007, Investigation of the groundwater system at Masaya Caldera, Nicaragua, using transient electromagnetics and numerical simulation: Journal of Volcanology and Geothermal Research, v. 166, no. 3-4, p. 217-232, https://doi.org/10.1016/j.jvolgeores.2007.07.016.","startPage":"217","endPage":"232","numberOfPages":"16","costCenters":[],"links":[{"id":212407,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jvolgeores.2007.07.016"},{"id":239887,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"166","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3ea1e4b0c8380cd63f05","contributors":{"authors":[{"text":"MacNeil, R.E.","contributorId":31981,"corporation":false,"usgs":true,"family":"MacNeil","given":"R.E.","email":"","affiliations":[],"preferred":false,"id":431252,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sanford, W. E. 0000-0002-6624-0280","orcid":"https://orcid.org/0000-0002-6624-0280","contributorId":102112,"corporation":false,"usgs":true,"family":"Sanford","given":"W. E.","affiliations":[],"preferred":false,"id":431256,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Connor, C.B.","contributorId":41653,"corporation":false,"usgs":true,"family":"Connor","given":"C.B.","email":"","affiliations":[],"preferred":false,"id":431254,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sandberg, S.K.","contributorId":99375,"corporation":false,"usgs":true,"family":"Sandberg","given":"S.K.","email":"","affiliations":[],"preferred":false,"id":431255,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Diez, M.","contributorId":40424,"corporation":false,"usgs":true,"family":"Diez","given":"M.","affiliations":[],"preferred":false,"id":431253,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70030918,"text":"70030918 - 2007 - Use of behavioral and physiological indicators to evaluate Scaphirhynchus sturgeon spawning success","interactions":[],"lastModifiedDate":"2016-12-06T17:49:33","indexId":"70030918","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2166,"text":"Journal of Applied Ichthyology","active":true,"publicationSubtype":{"id":10}},"title":"Use of behavioral and physiological indicators to evaluate Scaphirhynchus sturgeon spawning success","docAbstract":"

Thirty gravid, female shovelnose sturgeon (Scaphirhynchus platorynchus) were captured in the Lower Missouri River in March 2004 to evaluate the effectiveness of physiology, telemetry and remote sensor technology coupled with change point analysis in identifying when and where Scaphirhynchus sturgeon spawn. Captured sturgeons were instrumented with ultrasonic transmitters and with archival data storage tags (DST) that recorded temperature and pressure. Female sturgeon were tracked through the suspected spawning period. Thereafter, attempts were made to recapture fish to evaluate spawning success. At the time of transmitter implantation, blood and an ovarian biopsy were taken. Reproductive hormones and cortisol were measured in blood. Polarization indices and germinal vesicle breakdown were assessed on the biopsied oocytes to determine readiness to spawn. Behavioral data collected using telemetry and DST sensors were used to determine the direction and magnitude of possible spawning-related movements and to identify the timing of potential spawning events. Upon recapture observations of the ovaries and blood chemistry provided measures of spawning success and comparative indicators to explain differences in observed behavior. Behavioral and physiological indicators of spawning interpreted along with environmental measures may assist in the determination of variables that may cue sturgeon reproduction and the conditions under which sturgeon successfully spawn.

","language":"English","publisher":"Wiley","doi":"10.1111/j.1439-0426.2007.00894.x","issn":"01758659","usgsCitation":"DeLonay, A., Papoulias, D., Wildhaber, M., Annis, M., Bryan, J., Griffith, S., Holan, S., and Tillitt, D.E., 2007, Use of behavioral and physiological indicators to evaluate Scaphirhynchus sturgeon spawning success: Journal of Applied Ichthyology, v. 23, no. 4, p. 428-435, https://doi.org/10.1111/j.1439-0426.2007.00894.x.","productDescription":"8 p.","startPage":"428","endPage":"435","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"links":[{"id":477035,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1439-0426.2007.00894.x","text":"Publisher Index Page"},{"id":239000,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bbec4e4b08c986b329796","contributors":{"authors":[{"text":"DeLonay, A. 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L.","affiliations":[],"preferred":false,"id":429227,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Annis, M.L.","contributorId":53930,"corporation":false,"usgs":true,"family":"Annis","given":"M.L.","email":"","affiliations":[],"preferred":false,"id":429225,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bryan, J.L.","contributorId":15328,"corporation":false,"usgs":true,"family":"Bryan","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":429223,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Griffith, S.A.","contributorId":101866,"corporation":false,"usgs":true,"family":"Griffith","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":429230,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Holan, S. H.","contributorId":76453,"corporation":false,"usgs":false,"family":"Holan","given":"S. H.","affiliations":[],"preferred":false,"id":429228,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Tillitt, D. E.","contributorId":83462,"corporation":false,"usgs":true,"family":"Tillitt","given":"D.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":429229,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70032991,"text":"70032991 - 2007 - Lateral spread hazard mapping of the northern Salt Lake Valley, Utah, for a M7.0 scenario earthquake","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70032991","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1436,"text":"Earthquake Spectra","active":true,"publicationSubtype":{"id":10}},"title":"Lateral spread hazard mapping of the northern Salt Lake Valley, Utah, for a M7.0 scenario earthquake","docAbstract":"This paper describes the methodology used to develop a lateral spread-displacement hazard map for northern Salt Lake Valley, Utah, using a scenario M7.0 earthquake occurring on the Salt Lake City segment of the Wasatch fault. The mapping effort is supported by a substantial amount of geotechnical, geologic, and topographic data compiled for the Salt Lake Valley, Utah. ArcGIS?? routines created for the mapping project then input this information to perform site-specific lateral spread analyses using methods developed by Bartlett and Youd (1992) and Youd et al. (2002) at individual borehole locations. The distributions of predicted lateral spread displacements from the boreholes located spatially within a geologic unit were subsequently used to map the hazard for that particular unit. The mapped displacement zones consist of low hazard (0-0.1 m), moderate hazard (0.1-0.3 m), high hazard (0.3-1.0 m), and very high hazard (> 1.0 m). As expected, the produced map shows the highest hazard in the alluvial deposits at the center of the valley and in sandy deposits close to the fault. This mapping effort is currently being applied to the southern part of the Salt Lake Valley, Utah, and probabilistic maps are being developed for the entire valley. ?? 2007, Earthquake Engineering Research Institute.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Earthquake Spectra","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1193/1.2424987","issn":"87552930","usgsCitation":"Olsen, M., Bartlett, S., and Solomon, B., 2007, Lateral spread hazard mapping of the northern Salt Lake Valley, Utah, for a M7.0 scenario earthquake: Earthquake Spectra, v. 23, no. 1, p. 95-113, https://doi.org/10.1193/1.2424987.","startPage":"95","endPage":"113","numberOfPages":"19","costCenters":[],"links":[{"id":213238,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1193/1.2424987"},{"id":240843,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-02-01","publicationStatus":"PW","scienceBaseUri":"505a4576e4b0c8380cd6733c","contributors":{"authors":[{"text":"Olsen, M.J.","contributorId":56043,"corporation":false,"usgs":true,"family":"Olsen","given":"M.J.","email":"","affiliations":[],"preferred":false,"id":438859,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bartlett, S.F.","contributorId":11008,"corporation":false,"usgs":true,"family":"Bartlett","given":"S.F.","email":"","affiliations":[],"preferred":false,"id":438858,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Solomon, B.J.","contributorId":10045,"corporation":false,"usgs":true,"family":"Solomon","given":"B.J.","email":"","affiliations":[],"preferred":false,"id":438857,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70175149,"text":"70175149 - 2007 - USGS national surveys and analysis projects: Preliminary compilation of integrated geological datasets for the United States","interactions":[],"lastModifiedDate":"2016-08-01T12:38:38","indexId":"70175149","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"USGS national surveys and analysis projects: Preliminary compilation of integrated geological datasets for the United States","docAbstract":"

The growth in the use of Geographic \u0018nformation Systems (G\u0018S) has highlighted the need for regional and national digital geologic maps attributed with age and rock type information. Such spatial data can be conveniently used to generate derivative maps for purposes that include mineral-resource assessment, metallogenic studies, tectonic studies, human health and environmental research. \u0018n 1997, the United States Geological Survey’s Mineral Resources Program initiated an effort to develop national digital databases for use in mineral resource and environmental assessments. One primary activity of this effort was to compile a national digital geologic map database, utilizing state geologic maps, to support mineral resource studies in the range of 1:250,000- to 1:1,000,000-scale. Over the course of the past decade, state databases were prepared using a common standard for the database structure, fields, attributes, and data dictionaries. As of late 2006, standardized geological map databases for all conterminous (CONUS) states have been available on-line as USGS Open-File Reports. For Alaska and Hawaii, new state maps are being prepared, and the preliminary work for Alaska is being released as a series of 1:500,000-scale regional compilations. See below for a list of all published databases.

","conferenceTitle":"Digital Mapping Techniques '06","conferenceDate":"June 11-14, 2006","conferenceLocation":"Columbus, OH","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Nicholson, S.W., Stoeser, D.B., Wilson, F.H., Dicken, C., and Ludington, S., 2007, USGS national surveys and analysis projects: Preliminary compilation of integrated geological datasets for the United States, Digital Mapping Techniques '06, Columbus, OH, June 11-14, 2006, p. 1-7.","productDescription":"7 p.","startPage":"1","endPage":"7","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":325870,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":325869,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1285/pdf/Nicholson.pdf","text":"http://pubs.usgs.gov/of/2007/1285/pdf/Nicholson.pdf","size":"18KB","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57a072c0e4b060ce18fb2e62","contributors":{"authors":[{"text":"Nicholson, Suzanne W. 0000-0002-9365-1894 swnich@usgs.gov","orcid":"https://orcid.org/0000-0002-9365-1894","contributorId":880,"corporation":false,"usgs":true,"family":"Nicholson","given":"Suzanne","email":"swnich@usgs.gov","middleInitial":"W.","affiliations":[],"preferred":true,"id":644097,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stoeser, Douglas B. dstoeser@usgs.gov","contributorId":1821,"corporation":false,"usgs":true,"family":"Stoeser","given":"Douglas","email":"dstoeser@usgs.gov","middleInitial":"B.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":644098,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wilson, Frederic H. 0000-0003-1761-6437 fwilson@usgs.gov","orcid":"https://orcid.org/0000-0003-1761-6437","contributorId":67174,"corporation":false,"usgs":true,"family":"Wilson","given":"Frederic","email":"fwilson@usgs.gov","middleInitial":"H.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":644099,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dicken, Connie L. cdicken@usgs.gov","contributorId":4714,"corporation":false,"usgs":true,"family":"Dicken","given":"Connie L.","email":"cdicken@usgs.gov","affiliations":[{"id":245,"text":"Eastern Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":644100,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ludington, Steve","contributorId":106848,"corporation":false,"usgs":true,"family":"Ludington","given":"Steve","affiliations":[],"preferred":false,"id":644101,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70031241,"text":"70031241 - 2007 - Killer whales and marine mammal trends in the North Pacific - A re-examination of evidence for sequential megafauna collapse and the prey-switching hypothesis","interactions":[],"lastModifiedDate":"2012-03-12T17:21:19","indexId":"70031241","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2671,"text":"Marine Mammal Science","active":true,"publicationSubtype":{"id":10}},"title":"Killer whales and marine mammal trends in the North Pacific - A re-examination of evidence for sequential megafauna collapse and the prey-switching hypothesis","docAbstract":"Springer et al. (2003) contend that sequential declines occurred in North Pacific populations of harbor and fur seals, Steller sea lions, and sea otters. They hypothesize that these were due to increased predation by killer whales, when industrial whaling's removal of large whales as a supposed primary food source precipitated a prey switch. Using a regional approach, we reexamined whale catch data, killer whale predation observations, and the current biomass and trends of potential prey, and found little support for the prey-switching hypothesis. Large whale biomass in the Bering Sea did not decline as much as suggested by Springer et al., and much of the reduction occurred 50-100 yr ago, well before the declines of pinnipeds and sea otters began; thus, the need to switch prey starting in the 1970s is doubtful. With the sole exception that the sea otter decline followed the decline of pinnipeds, the reported declines were not in fact sequential. Given this, it is unlikely that a sequential megafaunal collapse from whales to sea otters occurred. The spatial and temporal patterns of pinniped and sea otter population trends are more complex than Springer et al. suggest, and are often inconsistent with their hypothesis. Populations remained stable or increased in many areas, despite extensive historical whaling and high killer whale abundance. Furthermore, observed killer whale predation has largely involved pinnipeds and small cetaceans; there is little evidence that large whales were ever a major prey item in high latitudes. Small cetaceans (ignored by Springer et al.) were likely abundant throughout the period. Overall, we suggest that the Springer et al. hypothesis represents a misleading and simplistic view of events and trophic relationships within this complex marine ecosystem. ?? 2007 by the Society for Marine Mammalogy.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine Mammal Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1748-7692.2006.00093.x","issn":"08240469","usgsCitation":"Wade, P., Burkanov, V., Dahlheim, M., Friday, N., Fritz, L., Loughlin, T.R., Mizroch, S., Muto, M., Rice, D., Barrett-Lennard, L.G., Black, N., Burdin, A., Calambokidis, J., Cerchio, S., Ford, J., Jacobsen, J., Matkin, C., Matkin, D., Mehta, A., Small, R., Straley, J., McCluskey, S., VanBlaricom, G., and Clapham, P., 2007, Killer whales and marine mammal trends in the North Pacific - A re-examination of evidence for sequential megafauna collapse and the prey-switching hypothesis: Marine Mammal Science, v. 23, no. 4, p. 766-802, https://doi.org/10.1111/j.1748-7692.2006.00093.x.","startPage":"766","endPage":"802","numberOfPages":"37","costCenters":[],"links":[{"id":477138,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hdl.handle.net/1912/1936","text":"External Repository"},{"id":211316,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1748-7692.2006.00093.x"},{"id":238585,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-06-26","publicationStatus":"PW","scienceBaseUri":"505a4095e4b0c8380cd64e8e","contributors":{"authors":[{"text":"Wade, P.R.","contributorId":71761,"corporation":false,"usgs":true,"family":"Wade","given":"P.R.","email":"","affiliations":[],"preferred":false,"id":430676,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Burkanov, V.N.","contributorId":56026,"corporation":false,"usgs":true,"family":"Burkanov","given":"V.N.","email":"","affiliations":[],"preferred":false,"id":430673,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dahlheim, M.E.","contributorId":106307,"corporation":false,"usgs":true,"family":"Dahlheim","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":430686,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Friday, N.A.","contributorId":45508,"corporation":false,"usgs":true,"family":"Friday","given":"N.A.","email":"","affiliations":[],"preferred":false,"id":430670,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Fritz, L.W.","contributorId":107922,"corporation":false,"usgs":true,"family":"Fritz","given":"L.W.","email":"","affiliations":[],"preferred":false,"id":430687,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Loughlin, Thomas R.","contributorId":18885,"corporation":false,"usgs":false,"family":"Loughlin","given":"Thomas","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":430667,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Mizroch, S.A.","contributorId":86965,"corporation":false,"usgs":true,"family":"Mizroch","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":430681,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Muto, M.M.","contributorId":72197,"corporation":false,"usgs":true,"family":"Muto","given":"M.M.","email":"","affiliations":[],"preferred":false,"id":430677,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Rice, D.W.","contributorId":37012,"corporation":false,"usgs":true,"family":"Rice","given":"D.W.","email":"","affiliations":[],"preferred":false,"id":430669,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Barrett-Lennard, L. G.","contributorId":73007,"corporation":false,"usgs":true,"family":"Barrett-Lennard","given":"L.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":430678,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Black, N.A.","contributorId":103467,"corporation":false,"usgs":true,"family":"Black","given":"N.A.","email":"","affiliations":[],"preferred":false,"id":430685,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Burdin, A.M.","contributorId":45661,"corporation":false,"usgs":true,"family":"Burdin","given":"A.M.","email":"","affiliations":[],"preferred":false,"id":430671,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Calambokidis, J.","contributorId":7079,"corporation":false,"usgs":true,"family":"Calambokidis","given":"J.","affiliations":[],"preferred":false,"id":430664,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Cerchio, S.","contributorId":85769,"corporation":false,"usgs":true,"family":"Cerchio","given":"S.","email":"","affiliations":[],"preferred":false,"id":430680,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Ford, J.K.B.","contributorId":46760,"corporation":false,"usgs":true,"family":"Ford","given":"J.K.B.","email":"","affiliations":[],"preferred":false,"id":430672,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Jacobsen, J.K.","contributorId":69775,"corporation":false,"usgs":true,"family":"Jacobsen","given":"J.K.","email":"","affiliations":[],"preferred":false,"id":430675,"contributorType":{"id":1,"text":"Authors"},"rank":16},{"text":"Matkin, C.O.","contributorId":11825,"corporation":false,"usgs":true,"family":"Matkin","given":"C.O.","email":"","affiliations":[],"preferred":false,"id":430665,"contributorType":{"id":1,"text":"Authors"},"rank":17},{"text":"Matkin, D.R.","contributorId":75329,"corporation":false,"usgs":true,"family":"Matkin","given":"D.R.","email":"","affiliations":[],"preferred":false,"id":430679,"contributorType":{"id":1,"text":"Authors"},"rank":18},{"text":"Mehta, A.V.","contributorId":96477,"corporation":false,"usgs":true,"family":"Mehta","given":"A.V.","email":"","affiliations":[],"preferred":false,"id":430684,"contributorType":{"id":1,"text":"Authors"},"rank":19},{"text":"Small, R.J.","contributorId":28800,"corporation":false,"usgs":true,"family":"Small","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":430668,"contributorType":{"id":1,"text":"Authors"},"rank":20},{"text":"Straley, J.M.","contributorId":12686,"corporation":false,"usgs":true,"family":"Straley","given":"J.M.","affiliations":[],"preferred":false,"id":430666,"contributorType":{"id":1,"text":"Authors"},"rank":21},{"text":"McCluskey, S.M.","contributorId":59624,"corporation":false,"usgs":true,"family":"McCluskey","given":"S.M.","email":"","affiliations":[],"preferred":false,"id":430674,"contributorType":{"id":1,"text":"Authors"},"rank":22},{"text":"VanBlaricom, G.R.","contributorId":94239,"corporation":false,"usgs":true,"family":"VanBlaricom","given":"G.R.","email":"","affiliations":[],"preferred":false,"id":430682,"contributorType":{"id":1,"text":"Authors"},"rank":23},{"text":"Clapham, P.J.","contributorId":95678,"corporation":false,"usgs":true,"family":"Clapham","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":430683,"contributorType":{"id":1,"text":"Authors"},"rank":24}]}} ,{"id":70032990,"text":"70032990 - 2007 - The viability of a nonenzymatic reductive citric acid cycle - Kinetics and thermochemistry","interactions":[],"lastModifiedDate":"2023-10-06T11:52:53.96102","indexId":"70032990","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2960,"text":"Origins of Life and Evolution of the Biosphere","active":true,"publicationSubtype":{"id":10}},"title":"The viability of a nonenzymatic reductive citric acid cycle - Kinetics and thermochemistry","docAbstract":"

The likelihood of a functioning nonenzymatic reductive citric acid cycle, recently proposed as the precursor to biosynthesis on early Earth, is examined on the basis of the kinetics and thermochemistry of the acetate → pyruvate → oxaloacetate → malate sequence. Using data derived from studies of the Pd-catalyzed phosphinate reduction of carbonyl functions it is shown that the rate of conversion of pyruvate to malate with that system would have been much too slow to have played a role in the early chemistry of life, while naturally occurring reduction systems such as the fayalite–magnetite–quartz and pyrrhotite–pyrite–magnetite mineral assemblages would have provided even slower conversions. It is also shown that the production of pyruvate from acetate is too highly endoergic to be driven by a naturally occurring energy source such as pyrophosphate. It is thus highly doubtful that the cycle can operate at suitable rates without enzymes, and most unlikely that it could have participated in the chemistry leading to life.

","language":"English","publisher":"Springer","doi":"10.1007/s11084-006-9017-6","issn":"01696149","usgsCitation":"Ross, D., 2007, The viability of a nonenzymatic reductive citric acid cycle - Kinetics and thermochemistry: Origins of Life and Evolution of the Biosphere, v. 37, no. 1, p. 61-65, https://doi.org/10.1007/s11084-006-9017-6.","productDescription":"5 p.","startPage":"61","endPage":"65","numberOfPages":"5","costCenters":[],"links":[{"id":240842,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"37","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-11-29","publicationStatus":"PW","scienceBaseUri":"505bb1bce4b08c986b3253c7","contributors":{"authors":[{"text":"Ross, D.S.","contributorId":33867,"corporation":false,"usgs":true,"family":"Ross","given":"D.S.","email":"","affiliations":[],"preferred":false,"id":438856,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70031353,"text":"70031353 - 2007 - Consequences of land-cover misclassification in models of impervious surface","interactions":[],"lastModifiedDate":"2023-02-10T17:53:07.880351","indexId":"70031353","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3052,"text":"Photogrammetric Engineering and Remote Sensing","active":true,"publicationSubtype":{"id":10}},"title":"Consequences of land-cover misclassification in models of impervious surface","docAbstract":"Model estimates of impervious area as a function of landcover area may be biased and imprecise because of errors in the land-cover classification. This investigation of the effects of land-cover misclassification on impervious surface models that use National Land Cover Data (NLCD) evaluates the consequences of adjusting land-cover within a watershed to reflect uncertainty assessment information. Model validation results indicate that using error-matrix information to adjust land-cover values used in impervious surface models does not substantially improve impervious surface predictions. Validation results indicate that the resolution of the landcover data (Level I and Level II) is more important in predicting impervious surface accurately than whether the land-cover data have been adjusted using information in the error matrix. Level I NLCD, adjusted for land-cover misclassification, is preferable to the other land-cover options for use in models of impervious surface. This result is tied to the lower classification error rates for the Level I NLCD. ?? 2007 American Society for Photogrammetry and Remote Sensing.","language":"English","publisher":"ASPRS","doi":"10.14358/PERS.73.12.1343","usgsCitation":"McMahon, G., 2007, Consequences of land-cover misclassification in models of impervious surface: Photogrammetric Engineering and Remote Sensing, v. 73, no. 12, p. 1343-1353, https://doi.org/10.14358/PERS.73.12.1343.","productDescription":"11 p.","startPage":"1343","endPage":"1353","numberOfPages":"11","costCenters":[{"id":565,"text":"Southeast Climate Science Center","active":true,"usgs":true}],"links":[{"id":477076,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.14358/pers.73.12.1343","text":"Publisher Index Page"},{"id":240061,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"73","issue":"12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f9d5e4b0c8380cd4d7e6","contributors":{"authors":[{"text":"McMahon, Gerard 0000-0001-7675-777X gmcmahon@usgs.gov","orcid":"https://orcid.org/0000-0001-7675-777X","contributorId":191488,"corporation":false,"usgs":true,"family":"McMahon","given":"Gerard","email":"gmcmahon@usgs.gov","affiliations":[{"id":565,"text":"Southeast Climate Science Center","active":true,"usgs":true},{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":431172,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70035203,"text":"70035203 - 2007 - Neogene transpressional foreland basin development on the north side of the central alaska range, usibelli group and nenana gravel, tanana basin","interactions":[],"lastModifiedDate":"2012-03-12T17:21:54","indexId":"70035203","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Neogene transpressional foreland basin development on the north side of the central alaska range, usibelli group and nenana gravel, tanana basin","docAbstract":"Neogene strata of the Tanana basin provide a long-term record of a northwardpropagating, transpressional foreland-basin system related to regional shortening of the central Alaska Range and strike-slip displacement on the Denali fault system. These strata are ???2 km thick and have been deformed and exhumed in thrust faults that form the foothills on the north side of the Alaska Range. The lower part of the sedimentary package, the Usibelli Group, consists of 800 m of mainly Miocene strata that were deposited in fluvial, lacustrine, and peat bog environments of the foredeep depozone of the foreland-basin system. Compositional data from conglomerate and sandstone, as well as recycled Upper Cretaceous palynomorphs, indicate that the Miocene foreland-basin system was supplied increasing amounts of sediment from lithologies currently exposed in thrust sheets located south of the basin. The upper part of the sedimentary package, the Nenana Gravel, consists of 1200 m of mainly Pliocene strata that were deposited in alluvial-fan and braidplain environments in the wedge-top depozone of the foreland-basin system. Compositional data from conglomerate and sandstone, as well as 40Ar/39Ar dating of detrital feldspars in sandstone and from granitic clasts in conglomerate, indicate that lithologies exposed in the central Alaska Range provided most of the detritus to the Pliocene foreland-basin system. 40Ar/39Ar dates from detrital feldspar grains also show that two main suites of plutons contributed sediment to the Nenana Gravel. Detrital feldspars with an average age of 56 Ma are interpreted to have been derived from the McKinley sequence of plutons located south of the Denali fault. Detrital feldspars with an average age of 34 Ma are interpreted to have been derived from plutons located north of the Denali fault. Plutons located south of the Denali fault provided detritus for the lower part of the Nenana Gravel, whereas plutons located north of the Denali fault began to contribute sediment during deposition of the upper part of the Nenana Gravel. This age distribution documented in detrital feldspars of the Nenana Gravel is interpreted as representing a progressive northward exhumation of plutons that were located south of the Pliocene Tanana basin. In contrast to previous studies, we interpret the Usibelli Group and Nenana Gravel to represent a continuum in the evolution of a transpressional foreland basin that began during Miocene time on the north side of the Alaska Range. Copyright ?? 2007 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Special Paper of the Geological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/2007.2431(20)","issn":"00721077","usgsCitation":"Ridgway, K., Thoms, E., Layer, P., Lesh, M., White, J.M., and Smith, S.V., 2007, Neogene transpressional foreland basin development on the north side of the central alaska range, usibelli group and nenana gravel, tanana basin: Special Paper of the Geological Society of America, no. 431, p. 507-547, https://doi.org/10.1130/2007.2431(20).","startPage":"507","endPage":"547","numberOfPages":"41","costCenters":[],"links":[{"id":215244,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2007.2431(20)"},{"id":243034,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"431","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6454e4b0c8380cd7298c","contributors":{"authors":[{"text":"Ridgway, K.D.","contributorId":62792,"corporation":false,"usgs":true,"family":"Ridgway","given":"K.D.","email":"","affiliations":[],"preferred":false,"id":449715,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thoms, E.E.","contributorId":88969,"corporation":false,"usgs":true,"family":"Thoms","given":"E.E.","email":"","affiliations":[],"preferred":false,"id":449716,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Layer, P.W.","contributorId":42398,"corporation":false,"usgs":true,"family":"Layer","given":"P.W.","email":"","affiliations":[],"preferred":false,"id":449713,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lesh, M.E.","contributorId":53619,"corporation":false,"usgs":true,"family":"Lesh","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":449714,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"White, J. M.","contributorId":40268,"corporation":false,"usgs":true,"family":"White","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":449712,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Smith, S. V.","contributorId":89284,"corporation":false,"usgs":true,"family":"Smith","given":"S.","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":449717,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70029707,"text":"70029707 - 2007 - PVTx properties of the CO2-H2O and CO2-H2O-NaCl systems below 647 K: assessment of experimental data and thermodynamic models","interactions":[],"lastModifiedDate":"2015-04-13T10:38:13","indexId":"70029707","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1213,"text":"Chemical Geology","active":true,"publicationSubtype":{"id":10}},"title":"PVTx properties of the CO2-H2O and CO2-H2O-NaCl systems below 647 K: assessment of experimental data and thermodynamic models","docAbstract":"

Evaluation of CO2 sequestration in formation brine or in seawater needs highly accurate experimental data or models of pressure–volume–temperature-composition (PVTx) properties for the CO2–H2O and CO2–H2O–NaCl systems. This paper presents a comprehensive review of the experimental PVTx properties and the thermodynamic models of these two systems. The following conclusions are drawn from the review: (1) About two-thirds of experimental data are consistent with each other, where the uncertainty in liquid volumes is within 0.5%, and that in gas volumes within 2%. However, this accuracy is not sufficient for assessing CO2 sequestration. Among the data sets for liquids, only a few are available for accurate modeling of CO2 sequestration. These data have an error of about 0.1% on average, roughly covering from 273 to 642 K and from 1 to 35 MPa; (2) There is a shortage of volumetric data of saturated vapor phase. (3) There are only a few data sets for the ternary liquids, and they are inconsistent with each other, where only a couple of data sets can be used to test a predictive density model for CO2 sequestration; (4) Although there are a few models with accuracy close to that of experiments, none of them is accurate enough for CO2 sequestration modeling, which normally needs an accuracy of density better than 0.1%. Some calculations are made available on www.geochem-model.org.

","language":"English","publisher":"Elsevier","doi":"10.1016/j.chemgeo.2006.11.011","issn":"00092541","usgsCitation":"Hu, J., Duan, Z., Zhu, C., and Chou, I., 2007, PVTx properties of the CO2-H2O and CO2-H2O-NaCl systems below 647 K: assessment of experimental data and thermodynamic models: Chemical Geology, v. 238, no. 3-4, p. 249-267, https://doi.org/10.1016/j.chemgeo.2006.11.011.","productDescription":"19 p.","startPage":"249","endPage":"267","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":240513,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212944,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.chemgeo.2006.11.011"}],"volume":"238","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7387e4b0c8380cd770ca","contributors":{"authors":[{"text":"Hu, Jiawen","contributorId":41630,"corporation":false,"usgs":true,"family":"Hu","given":"Jiawen","email":"","affiliations":[],"preferred":false,"id":423939,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Duan, Zhenhao","contributorId":71302,"corporation":false,"usgs":true,"family":"Duan","given":"Zhenhao","email":"","affiliations":[],"preferred":false,"id":423941,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhu, Chen","contributorId":6244,"corporation":false,"usgs":true,"family":"Zhu","given":"Chen","email":"","affiliations":[],"preferred":false,"id":423938,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Chou, I.-M. 0000-0001-5233-6479","orcid":"https://orcid.org/0000-0001-5233-6479","contributorId":44283,"corporation":false,"usgs":true,"family":"Chou","given":"I.-M.","affiliations":[{"id":245,"text":"Eastern Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":423940,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ]}