{"pageNumber":"881","pageRowStart":"22000","pageSize":"25","recordCount":46733,"records":[{"id":70031802,"text":"70031802 - 2007 - High nutrient pulses, tidal mixing and biological response in a small California estuary: Variability in nutrient concentrations from decadal to hourly time scales","interactions":[],"lastModifiedDate":"2012-03-12T17:21:06","indexId":"70031802","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1587,"text":"Estuarine, Coastal and Shelf Science","active":true,"publicationSubtype":{"id":10}},"title":"High nutrient pulses, tidal mixing and biological response in a small California estuary: Variability in nutrient concentrations from decadal to hourly time scales","docAbstract":"Elkhorn Slough is a small estuary in Central California, where nutrient inputs are dominated by runoff from agricultural row crops, a golf course, and residential development. We examined the variability in nutrient concentrations from decadal to hourly time scales in Elkhorn Slough to compare forcing by physical and biological factors. Hourly data were collected using in situ nitrate analyzers and water quality data sondes, and two decades of monthly monitoring data were analyzed. Nutrient concentrations increased from the mid 1970s to 1990s as pastures and woodlands were converted to row crops and population increased in the watershed. Climatic variability was also a significant factor controlling interannual nutrient variability, with higher nutrient concentrations during wet than drought years. Elkhorn Slough has a Mediterranean climate with dry and rainy seasons. Dissolved inorganic nitrogen (DIN) concentrations were relatively low (10-70 ??mol L-1) during the dry season and high (20-160 ??mol L-1) during the rainy season. Dissolved inorganic phosphorus (DIP) concentrations showed the inverse pattern, with higher concentrations during the dry season. Pulsed runoff events were a consistent feature controlling nitrate concentrations during the rainy season. Peak nitrate concentrations lagged runoff events by 1 to 6 days. Tidal exchange with Monterey Bay was also an important process controlling nutrient concentrations, particularly near the mouth of the Slough. Biological processes had the greatest effect on nitrate concentrations during the dry season and were less important during the rainy season. While primary production was enhanced by nutrient pulses, chlorophyll a concentrations were not. We believe that the generally weak biological response compared to the strong physical forcing in Elkhorn Slough occurred because the short residence time and tidal mixing rapidly diluted nutrient pulses. ?? 2006 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Estuarine, Coastal and Shelf Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.ecss.2006.08.015","issn":"02727714","usgsCitation":"Caffrey, J., Chapin, T., Jannasch, H., and Haskins, J., 2007, High nutrient pulses, tidal mixing and biological response in a small California estuary: Variability in nutrient concentrations from decadal to hourly time scales: Estuarine, Coastal and Shelf Science, v. 71, no. 3-4, p. 368-380, https://doi.org/10.1016/j.ecss.2006.08.015.","startPage":"368","endPage":"380","numberOfPages":"13","costCenters":[],"links":[{"id":240157,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212641,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecss.2006.08.015"}],"volume":"71","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a30c1e4b0c8380cd5d8fb","contributors":{"authors":[{"text":"Caffrey, J.M.","contributorId":98750,"corporation":false,"usgs":true,"family":"Caffrey","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":433194,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chapin, T.P. 0000-0001-6587-0734","orcid":"https://orcid.org/0000-0001-6587-0734","contributorId":24142,"corporation":false,"usgs":true,"family":"Chapin","given":"T.P.","affiliations":[],"preferred":false,"id":433192,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jannasch, H.W.","contributorId":89665,"corporation":false,"usgs":true,"family":"Jannasch","given":"H.W.","email":"","affiliations":[],"preferred":false,"id":433193,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Haskins, J.C.","contributorId":7473,"corporation":false,"usgs":true,"family":"Haskins","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":433191,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031739,"text":"70031739 - 2007 - Comparison of local- to regional-scale estimates of ground-water recharge in Minnesota, USA","interactions":[],"lastModifiedDate":"2023-10-03T11:20:41.383437","indexId":"70031739","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Comparison of local- to regional-scale estimates of ground-water recharge in Minnesota, USA","docAbstract":"<p><span>Regional ground-water recharge estimates for Minnesota were compared to estimates made on the basis of four local- and basin-scale methods. Three local-scale methods (unsaturated-zone water balance, water-table fluctuations (WTF) using three approaches, and age dating of ground water) yielded point estimates of recharge that represent spatial scales from about 1 to about 1000&nbsp;m</span><sup>2</sup><span>. A fourth method (RORA, a basin-scale analysis of streamflow records using a recession-curve-displacement technique) yielded recharge estimates at a scale of 10&ndash;1000s of km</span><sup>2</sup><span>. The RORA basin-scale recharge estimates were regionalized to estimate recharge for the entire State of Minnesota on the basis of a regional regression recharge (RRR) model that also incorporated soil and climate data. Recharge rates estimated by the RRR model compared favorably to the local and basin-scale recharge estimates. RRR estimates at study locations were about 41% less on average than the unsaturated-zone water-balance estimates, ranged from 44% greater to 12% less than estimates that were based on the three WTF approaches, were about 4% less than the age dating of ground-water estimates, and were about 5% greater than the RORA estimates. Of the methods used in this study, the WTF method is the simplest and easiest to apply. Recharge estimates made on the basis of the UZWB method were inconsistent with the results from the other methods. Recharge estimates using the RRR model could be a good source of input for regional ground-water flow models; RRR model results currently are being applied for this purpose in USGS studies elsewhere.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.jhydrol.2006.10.010","issn":"00221694","usgsCitation":"Delin, G., Healy, R.W., Lorenz, D., and Nimmo, J., 2007, Comparison of local- to regional-scale estimates of ground-water recharge in Minnesota, USA: Journal of Hydrology, v. 334, no. 1-2, p. 231-249, https://doi.org/10.1016/j.jhydrol.2006.10.010.","productDescription":"19 p.","startPage":"231","endPage":"249","numberOfPages":"19","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":392,"text":"Minnesota Water Science Center","active":true,"usgs":true}],"links":[{"id":239641,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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N.","contributorId":12834,"corporation":false,"usgs":true,"family":"Delin","given":"G. N.","affiliations":[],"preferred":false,"id":432922,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Healy, R. W.","contributorId":89872,"corporation":false,"usgs":true,"family":"Healy","given":"R.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":432924,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lorenz, D. L.","contributorId":10776,"corporation":false,"usgs":true,"family":"Lorenz","given":"D. L.","affiliations":[],"preferred":false,"id":432921,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nimmo, J. R. 0000-0001-8191-1727","orcid":"https://orcid.org/0000-0001-8191-1727","contributorId":58304,"corporation":false,"usgs":true,"family":"Nimmo","given":"J. R.","affiliations":[],"preferred":false,"id":432923,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031804,"text":"70031804 - 2007 - Geologic mapping of the Amirani-Gish Bar region of Io: Implications for the global geologic mapping of Io","interactions":[],"lastModifiedDate":"2018-11-07T11:09:04","indexId":"70031804","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Geologic mapping of the Amirani-Gish Bar region of Io: Implications for the global geologic mapping of Io","docAbstract":"<p>We produced the first geologic map of the Amirani-Gish Bar region of Io, the last of four regional maps generated from Galileo mission data. The Amirani-Gish Bar region has five primary types of geologic materials: plains, mountains, patera floors, flows, and diffuse deposits. The flows and patera floors are thought to be compositionally similar, but are subdivided based on interpretations regarding their emplacement environments and mechanisms. Our mapping shows that volcanic activity in the Amirani-Gish Bar region is dominated by the Amirani Eruptive Center (AEC), now recognized to be part of an extensive, combined Amirani-Maui flow field. A mappable flow connects Amirani and Maui, suggesting that Maui is fed from Amirani, such that the post-Voyager designation \"Maui Eruptive Center\" should be revised. Amirani contains at least four hot spots detected by Galileo, and is the source of widespread bright (sulfur?) flows and active dark (silicate?) flows being emplaced in the Promethean style (slowly emplaced, compound flow fields). The floor of Gish Bar Patera has been partially resurfaced by dark lava flows, although other parts of its floor are bright and appeared unchanged during the Galileo mission. This suggests that the floor did not undergo complete resurfacing as a lava lake as proposed for other ionian paterae. There are several other hot spots in the region that are the sources of both active dark flows (confined within paterae), and SO2- and S2-rich diffuse deposits. Mapped diffuse deposits around fractures on mountains and in the plains appear to serve as the source for gas venting without the release of magma, an association previously unrecognized in this region. The six mountains mapped in this region exhibit various states of degradation. In addition to gaining insight into this region of Io, all four maps are studied to assess the best methodology to use to produce a new global geologic map of Io based on the newly released, combined Galileo-Voyager global mosaics. To convey the complexity of ionian surface geology, we find that a new global geologic map of Io should include a map sheet displaying the global abundances and types of surface features as well as a complementary GIS database as a means to catalog the record of surface changes observed since the Voyager flybys and during the Galileo mission.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Icarus","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.icarus.2006.08.023","issn":"00191035","usgsCitation":"Williams, D., Keszthelyi, L., Crown, D.A., Jaeger, W.L., and Schenk, P., 2007, Geologic mapping of the Amirani-Gish Bar region of Io: Implications for the global geologic mapping of Io: Icarus, v. 186, no. 1, p. 204-217, https://doi.org/10.1016/j.icarus.2006.08.023.","productDescription":"14 p.","startPage":"204","endPage":"217","numberOfPages":"14","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":239644,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"186","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1fc5e4b0c8380cd5696d","contributors":{"authors":[{"text":"Williams, David A.","contributorId":84604,"corporation":false,"usgs":true,"family":"Williams","given":"David A.","affiliations":[],"preferred":false,"id":433202,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Keszthelyi, Laszlo P. 0000-0003-1879-4331 laz@usgs.gov","orcid":"https://orcid.org/0000-0003-1879-4331","contributorId":52802,"corporation":false,"usgs":true,"family":"Keszthelyi","given":"Laszlo P.","email":"laz@usgs.gov","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":433199,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Crown, David A.","contributorId":196622,"corporation":false,"usgs":false,"family":"Crown","given":"David","email":"","middleInitial":"A.","affiliations":[{"id":24732,"text":"Planetary Science Institute, Tucson","active":true,"usgs":false}],"preferred":false,"id":433203,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jaeger, Windy L.","contributorId":61679,"corporation":false,"usgs":true,"family":"Jaeger","given":"Windy","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":433201,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Schenk, Paul M.","contributorId":66946,"corporation":false,"usgs":false,"family":"Schenk","given":"Paul M.","affiliations":[{"id":12445,"text":"Lunar and Planetary Institute","active":true,"usgs":false}],"preferred":false,"id":433200,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031403,"text":"70031403 - 2007 - Physically based estimation of soil water retention from textural data: General framework, new models, and streamlined existing models","interactions":[],"lastModifiedDate":"2023-07-18T11:05:02.903393","indexId":"70031403","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3674,"text":"Vadose Zone Journal","active":true,"publicationSubtype":{"id":10}},"title":"Physically based estimation of soil water retention from textural data: General framework, new models, and streamlined existing models","docAbstract":"<p><span>Numerous models are in widespread use for the estimation of soil water retention from more easily measured textural data. Improved models are needed for better prediction and wider applicability. We developed a basic framework from which new and existing models can be derived to facilitate improvements. Starting from the assumption that every particle has a characteristic dimension&nbsp;</span><i>R</i><span>&nbsp;associated uniquely with a matric pressure ψ and that the form of the ψ–</span><i>R</i><span>&nbsp;relation is the defining characteristic of each model, this framework leads to particular models by specification of geometric relationships between pores and particles. Typical assumptions are that particles are spheres, pores are cylinders with volume equal to the associated particle volume times the void ratio, and that the capillary inverse proportionality between radius and matric pressure is valid. Examples include fixed-pore-shape and fixed-pore-length models. We also developed alternative versions of the model of Arya and Paris that eliminate its interval-size dependence and other problems. The alternative models are calculable by direct application of algebraic formulas rather than manipulation of data tables and intermediate results, and they easily combine with other models (e.g., incorporating structural effects) that are formulated on a continuous basis. Additionally, we developed a family of models based on the same pore geometry as the widely used unsaturated hydraulic conductivity model of Mualem. Predictions of measurements for different suitable media show that some of the models provide consistently good results and can be chosen based on ease of calculations and other factors.</span></p>","language":"English","publisher":"Soil Science Society of America","doi":"10.2136/vzj2007.0019","issn":"15391663","usgsCitation":"Nimmo, J.R., Herkelrath, W.N., and Laguna, L., 2007, Physically based estimation of soil water retention from textural data: General framework, new models, and streamlined existing models: Vadose Zone Journal, v. 6, no. 4, p. 766-773, https://doi.org/10.2136/vzj2007.0019.","productDescription":"8 p.","startPage":"766","endPage":"773","numberOfPages":"8","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":498910,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.2136/vzj2007.0019","text":"Publisher Index Page"},{"id":239755,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"6","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7af0e4b0c8380cd7918e","contributors":{"authors":[{"text":"Nimmo, John R. 0000-0001-8191-1727 jrnimmo@usgs.gov","orcid":"https://orcid.org/0000-0001-8191-1727","contributorId":757,"corporation":false,"usgs":true,"family":"Nimmo","given":"John","email":"jrnimmo@usgs.gov","middleInitial":"R.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":431354,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Herkelrath, William N. 0000-0002-6149-5524 wnherkel@usgs.gov","orcid":"https://orcid.org/0000-0002-6149-5524","contributorId":2612,"corporation":false,"usgs":true,"family":"Herkelrath","given":"William","email":"wnherkel@usgs.gov","middleInitial":"N.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":431355,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Laguna, Luna","contributorId":12694,"corporation":false,"usgs":true,"family":"Laguna","given":"Luna","email":"","affiliations":[],"preferred":false,"id":431353,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030928,"text":"70030928 - 2007 - The case for infrasound as the long-range map cue in avian navigation","interactions":[],"lastModifiedDate":"2012-03-12T17:21:16","indexId":"70030928","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"The case for infrasound as the long-range map cue in avian navigation","docAbstract":"Of the various 'map' and 'compass' components of Kramer's avian navigational model, the long-range map component is the least well understood. In this paper atmospheric infrasounds are proposed as the elusive longrange cues constituting the avian navigational map. Although infrasounds were considered a viable candidate for the avian map in the 1970s, and pigeons in the laboratory were found to detect sounds at surprisingly low frequencies (0.05 Hz), other tests appeared to support either of the currently favored olfactory or magnetic maps. Neither of these hypotheses, however, is able to explain the full set of observations, and the field has been at an impasse for several decades. To begin, brief descriptions of infrasonic waves and their passage through the atmosphere are given, followed by accounts of previously unexplained release results. These examples include 'release-site biases' which are deviations of departing pigeons from the homeward bearing, an annual variation in homing performance observed only in Europe, difficulties orienting over lakes and above temperature inversions, and the mysterious disruption of several pigeon races. All of these irregularities can be consistently explained by the deflection or masking of infrasonic cues by atmospheric conditions or by other infrasonic sources (microbaroms, sonic booms), respectively. A source of continuous geographic infrasound generated by atmosphere-coupled microseisms is also proposed. In conclusion, several suggestions are made toward resolving some of the conflicting experimental data with the pigeons' possible use of infrasonic cues.","largerWorkTitle":"Proceedings of the Annual Meeting - Institute of Navigation","conferenceTitle":"63rd Annual Meeting of the Institute of Navigation 2007","conferenceDate":"23 April 2007 through 25 April 2007","conferenceLocation":"Cambridge, MA","language":"English","isbn":"1604232862; 9781604232868","usgsCitation":"Hagstrum, J., 2007, The case for infrasound as the long-range map cue in avian navigation, <i>in</i> Proceedings of the Annual Meeting - Institute of Navigation, Cambridge, MA, 23 April 2007 through 25 April 2007, p. 280-293.","startPage":"280","endPage":"293","numberOfPages":"14","costCenters":[],"links":[{"id":238637,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505baa07e4b08c986b3226a6","contributors":{"authors":[{"text":"Hagstrum, J.T.","contributorId":75922,"corporation":false,"usgs":true,"family":"Hagstrum","given":"J.T.","email":"","affiliations":[],"preferred":false,"id":429260,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70030995,"text":"70030995 - 2007 - A critical assessment of the Burning Index in Los Angeles County, California","interactions":[],"lastModifiedDate":"2012-03-12T17:21:17","indexId":"70030995","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2083,"text":"International Journal of Wildland Fire","active":true,"publicationSubtype":{"id":10}},"title":"A critical assessment of the Burning Index in Los Angeles County, California","docAbstract":"The Burning Index (BI) is commonly used as a predictor of wildfire activity. An examination of data on the BI and wildfires in Los Angeles County, California, from January 1976 to December 2000 reveals that although the BI is positively associated with wildfire occurrence, its predictive value is quite limited. Wind speed alone has a higher correlation with burn area than BI, for instance, and a simple alternative point process model using wind speed, relative humidity, precipitation and temperature well outperforms the BI in terms of predictive power. The BI is generally far too high in winter and too low in fall, and may exaggerate the impact of individual variables such as wind speed or temperature during times when other variables, such as precipitation or relative humidity, render the environment ill suited for wildfires. ?? IAWF 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"International Journal of Wildland Fire","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1071/WF05089","issn":"10498001","usgsCitation":"Schoenberg, F., Chang, H., Keeley, J., Pompa, J., Woods, J., and Xu, H., 2007, A critical assessment of the Burning Index in Los Angeles County, California: International Journal of Wildland Fire, v. 16, no. 4, p. 473-483, https://doi.org/10.1071/WF05089.","startPage":"473","endPage":"483","numberOfPages":"11","costCenters":[],"links":[{"id":493734,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://escholarship.org/uc/item/2ft54279","text":"External Repository"},{"id":211302,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1071/WF05089"},{"id":238571,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e39fe4b0c8380cd46132","contributors":{"authors":[{"text":"Schoenberg, F.P.","contributorId":56438,"corporation":false,"usgs":true,"family":"Schoenberg","given":"F.P.","email":"","affiliations":[],"preferred":false,"id":429555,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chang, H.-C.","contributorId":80463,"corporation":false,"usgs":true,"family":"Chang","given":"H.-C.","email":"","affiliations":[],"preferred":false,"id":429557,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Keeley, Jon E. 0000-0002-4564-6521","orcid":"https://orcid.org/0000-0002-4564-6521","contributorId":69082,"corporation":false,"usgs":true,"family":"Keeley","given":"Jon E.","affiliations":[],"preferred":false,"id":429556,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Pompa, J.","contributorId":39577,"corporation":false,"usgs":true,"family":"Pompa","given":"J.","email":"","affiliations":[],"preferred":false,"id":429553,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Woods, J.","contributorId":46304,"corporation":false,"usgs":true,"family":"Woods","given":"J.","email":"","affiliations":[],"preferred":false,"id":429554,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Xu, H.","contributorId":83331,"corporation":false,"usgs":true,"family":"Xu","given":"H.","email":"","affiliations":[],"preferred":false,"id":429558,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031408,"text":"70031408 - 2007 - In situ time-series measurements of subseafloor sediment properties","interactions":[],"lastModifiedDate":"2023-07-21T12:03:17.038477","indexId":"70031408","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1941,"text":"IEEE Journal of Oceanic Engineering","active":true,"publicationSubtype":{"id":10}},"title":"In situ time-series measurements of subseafloor sediment properties","docAbstract":"<div class=\"abstract-text row g-0\"><div class=\"col-12\"><div class=\"u-mb-1\"><div>The capabilities and diversity of subsurface sediment sensors lags significantly from what is available for the water column, thereby limiting progress in understanding time-dependent seabed exchange and high-frequency acoustics. To help redress this imbalance, a new instrument, the autonomous sediment profiler (ASP), is described herein. ASP consists of a four-electrode, Wenner-type resistivity probe and a thermistor that log data at 0.1-cm vertical intervals over a 58-cm vertical profile. To avoid resampling the same spot on the seafloor, the probes are moved horizontally within a 20 times 100-cm<span>&nbsp;</span><sup>-2</sup><span>&nbsp;</span>area in one of three preselected patterns. Memory and power capacities permit sampling at hourly intervals for up to 3-mo duration. The system was tested in a laboratory tank and shown to be able to resolve high-frequency sediment consolidation, as well as changes in sediment roughness. In a field test off the southern coast of France, the system collected resistivity and temperature data at hourly intervals for 16 d. Coupled with environmental data collected on waves, currents, and suspended sediment, the ASP is shown to be useful for understanding temporal evolution of subsurface sediment porosity, although no large depositional or erosional events occurred during the deployment. Following a rapid decrease in bottom-water temperature, the evolution of the subsurface temperature field was consistent with the 1-D thermal diffusion equation coupled with advection in the upper 3-4 cm. Collectively, the laboratory and field tests yielded promising results on time-dependent seabed change.</div></div></div></div>","language":"English","publisher":"IEEE","doi":"10.1109/JOE.2007.907927","issn":"03649059","usgsCitation":"Wheatcroft, R.A., Stevens, A., and Johnson, R., 2007, In situ time-series measurements of subseafloor sediment properties: IEEE Journal of Oceanic Engineering, v. 32, no. 4, p. 862-871, https://doi.org/10.1109/JOE.2007.907927.","productDescription":"10 p.","startPage":"862","endPage":"871","numberOfPages":"10","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":239855,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"32","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3986e4b0c8380cd6195f","contributors":{"authors":[{"text":"Wheatcroft, R. A.","contributorId":76503,"corporation":false,"usgs":false,"family":"Wheatcroft","given":"R.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":431378,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stevens, A.W.","contributorId":42424,"corporation":false,"usgs":true,"family":"Stevens","given":"A.W.","email":"","affiliations":[],"preferred":false,"id":431377,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Johnson, R.V.","contributorId":14639,"corporation":false,"usgs":true,"family":"Johnson","given":"R.V.","affiliations":[],"preferred":false,"id":431376,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031672,"text":"70031672 - 2007 - A comparison of conventional capture versus PIT reader techniques for estimating survival and capture probabilities of big brown bats (Eptesicus fuscus)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031672","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":629,"text":"Acta Chiropterologica","active":true,"publicationSubtype":{"id":10}},"title":"A comparison of conventional capture versus PIT reader techniques for estimating survival and capture probabilities of big brown bats (Eptesicus fuscus)","docAbstract":"We compared conventional capture (primarily mist nets and harp traps) and passive integrated transponder (PIT) tagging techniques for estimating capture and survival probabilities of big brown bats (Eptesicus fuscus) roosting in buildings in Fort Collins, Colorado. A total of 987 female adult and juvenile bats were captured and marked by subdermal injection of PIT tags during the summers of 2001-2005 at five maternity colonies in buildings. Openings to roosts were equipped with PIT hoop-style readers, and exit and entry of bats were passively monitored on a daily basis throughout the summers of 2002-2005. PIT readers 'recaptured' adult and juvenile females more often than conventional capture events at each roost. Estimates of annual capture probabilities for all five colonies were on average twice as high when estimated from PIT reader data (P?? = 0.93-1.00) than when derived from conventional techniques (P?? = 0.26-0.66), and as a consequence annual survival estimates were more precisely estimated when using PIT reader encounters. Short-term, daily capture estimates were also higher using PIT readers than conventional captures. We discuss the advantages and limitations of using PIT tags and passive encounters with hoop readers vs. conventional capture techniques for estimating these vital parameters in big brown bats. ?? Museum and Institute of Zoology PAS.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Acta Chiropterologica","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.3161/1733-5329(2007)9[149:ACOCCV]2.0.CO;2","issn":"15081109","usgsCitation":"Ellison, L., O'Shea, T., Neubaum, D., Neubaum, M., Pearce, R., and Bowen, R.A., 2007, A comparison of conventional capture versus PIT reader techniques for estimating survival and capture probabilities of big brown bats (Eptesicus fuscus): Acta Chiropterologica, v. 9, no. 1, p. 149-160, https://doi.org/10.3161/1733-5329(2007)9[149:ACOCCV]2.0.CO;2.","startPage":"149","endPage":"160","numberOfPages":"12","costCenters":[],"links":[{"id":212188,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3161/1733-5329(2007)9[149:ACOCCV]2.0.CO;2"},{"id":239638,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"9","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e359e4b0c8380cd45fac","contributors":{"authors":[{"text":"Ellison, L.E.","contributorId":103610,"corporation":false,"usgs":true,"family":"Ellison","given":"L.E.","email":"","affiliations":[],"preferred":false,"id":432612,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"O'Shea, T. J. 0000-0002-0758-9730","orcid":"https://orcid.org/0000-0002-0758-9730","contributorId":50100,"corporation":false,"usgs":true,"family":"O'Shea","given":"T. J.","affiliations":[],"preferred":false,"id":432609,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Neubaum, D.J.","contributorId":43720,"corporation":false,"usgs":true,"family":"Neubaum","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":432607,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Neubaum, M.A.","contributorId":50866,"corporation":false,"usgs":true,"family":"Neubaum","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":432610,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Pearce, R.D.","contributorId":45439,"corporation":false,"usgs":true,"family":"Pearce","given":"R.D.","email":"","affiliations":[],"preferred":false,"id":432608,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Bowen, R. A.","contributorId":80623,"corporation":false,"usgs":false,"family":"Bowen","given":"R.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":432611,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70042808,"text":"cir13064B - 2007 - Data access and dissemination for emergency response and long-term recovery efforts related to Hurricanes Katrina and Rita","interactions":[],"lastModifiedDate":"2019-06-18T12:09:32","indexId":"cir13064B","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":307,"text":"Circular","code":"CIR","onlineIssn":"2330-5703","printIssn":"1067-084X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"1306","chapter":"4B","title":"Data access and dissemination for emergency response and long-term recovery efforts related to Hurricanes Katrina and Rita","docAbstract":"The U.S. Geological Survey's (USGS) National Wetlands Research Center (NWRC) responded to Hurricanes Katrina and Rita by providing geospatial support to Federal, State, and local partners. The NWRC used its data and information management systems to deliver aerial photography and maps to emergency responders in a time of critical need.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Science and the storms-the USGS response to the hurricanes of 2005 (Circular 1306)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/cir13064B","collaboration":"This report is Chapter 4B in <i>Science and the storms-the USGS response to the hurricanes of 2005</i>.  See <a href=\"http://pubs.er.usgs.gov/publication/cir1306\" target=\"_blank\">Circular 1306</a> for more information and other chapters.","usgsCitation":"Wilson, S., and Cretini, C., 2007, Data access and dissemination for emergency response and long-term recovery efforts related to Hurricanes Katrina and Rita: U.S. Geological Survey Circular 1306, 4 p., https://doi.org/10.3133/cir13064B.","productDescription":"4 p.","startPage":"71","endPage":"74","numberOfPages":"4","costCenters":[{"id":455,"text":"National Wetlands Research Center","active":true,"usgs":true},{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"links":[{"id":266414,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/cir_1306_4b.jpg"},{"id":266413,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/circ/1306/pdf/c1306_ch4_b.pdf"},{"id":266412,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/circ/1306/"}],"country":"United States","state":"Louisiana;Mississippi","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -91.4,28.9 ], [ -91.4,31.4 ], [ -87.6,31.4 ], [ -87.6,28.9 ], [ -91.4,28.9 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5102660ce4b0d4f5ea817bc1","contributors":{"authors":[{"text":"Wilson, Scott 0000-0001-8055-8618","orcid":"https://orcid.org/0000-0001-8055-8618","contributorId":93103,"corporation":false,"usgs":true,"family":"Wilson","given":"Scott","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":false,"id":472316,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cretini, Chris 0000-0002-0821-7832","orcid":"https://orcid.org/0000-0002-0821-7832","contributorId":71224,"corporation":false,"usgs":true,"family":"Cretini","given":"Chris","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":false,"id":472315,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030945,"text":"70030945 - 2007 - Bald Mountain gold mining district, Nevada: A Jurassic reduced intrusion-related gold system","interactions":[],"lastModifiedDate":"2012-03-12T17:21:19","indexId":"70030945","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Bald Mountain gold mining district, Nevada: A Jurassic reduced intrusion-related gold system","docAbstract":"The Bald Mountain mining district has produced about 2 million ounces (Moz) of An. Geologic mapping, field relationships, geochemical data, petrographic observations, fluid inclusion characteristics, and Pb, S, O, and H isotope data indicate that An mineralization was associated with a reduced Jurassic intrusion. Gold deposits are localized within and surrounding a Jurassic (159 Ma) quartz monzonite porphyry pluton and dike complex that intrudes Cambrian to Mississippian carbonate and clastic rocks. The pluton, associated dikes, and An mineralization were controlled by a crustal-scale northwest-trending structure named the Bida trend. Gold deposits are localized by fracture networks in the pluton and the contact metamorphic aureole, dike margins, high-angle faults, and certain strata or shale-limestone contacts in sedimentary rocks. Gold mineralization was accompanied by silicification and phyllic alteration, ??argillic alteration at shallow levels. Although An is typically present throughout, the system exhibits a classic concentric geochemical zonation pattern with Mo, W, Bi, and Cu near the center, Ag, Pb, and Zn at intermediate distances, and As and Sb peripheral to the intrusion. Near the center of the system, micron-sized native An occurs with base metal sulfides and sulfosalts. In peripheral deposits and in later stages of mineralization, Au is typically submicron in size and resides in pyrite or arsenopyrite. Electron microprobe and laser ablation ICP-MS analyses show that arsenopyrite, pyrite, and Bi sulfide minerals contain 10s to 1,000s of ppm Au. Ore-forming fluids were aqueous and carbonic at deep levels and episodically hypersaline at shallow levels due to boiling. The isotopic compositions of H and O in quartz and sericite and S and Pb in sulfides are indicative of magmatic ore fluids with sedimentary sulfur. Together, the evidence suggests that Au was introduced by reduced S-bearing magmatic fluids derived from a reduced intrusion. The reduced character of the intrusion was caused by assimilation of carbonaceous sedimentary rocks. Tertiary faults dismember the area and drop down the upper part of the mineralizing system to the west. The abundant and widespread kaolinite in oxide ores is relatively disordered (1A polytype) and has ??D and ??18O values suggestive of a supergene origin. The deep weathering and oxidation of the ores associated with exhumation made them amenable to open-pit mining and processing using cyanide heap leach methods. ?? 2007 Society of Economic Geologists, Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Economic Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/gsecongeo.102.6.1129","issn":"03610128","usgsCitation":"Nutt, C., and Hofstra, A., 2007, Bald Mountain gold mining district, Nevada: A Jurassic reduced intrusion-related gold system: Economic Geology, v. 102, no. 6, p. 1129-1155, https://doi.org/10.2113/gsecongeo.102.6.1129.","startPage":"1129","endPage":"1155","numberOfPages":"27","costCenters":[],"links":[{"id":211588,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gsecongeo.102.6.1129"},{"id":238900,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"102","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059eface4b0c8380cd4a3c0","contributors":{"authors":[{"text":"Nutt, C.J.","contributorId":52577,"corporation":false,"usgs":true,"family":"Nutt","given":"C.J.","email":"","affiliations":[],"preferred":false,"id":429333,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hofstra, A. H. 0000-0002-2450-1593","orcid":"https://orcid.org/0000-0002-2450-1593","contributorId":41426,"corporation":false,"usgs":true,"family":"Hofstra","given":"A. H.","affiliations":[],"preferred":false,"id":429332,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031436,"text":"70031436 - 2007 - Effects of earlier sea ice breakup on survival and population size of polar bears in western Hudson Bay","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031436","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Effects of earlier sea ice breakup on survival and population size of polar bears in western Hudson Bay","docAbstract":"Some of the most pronounced ecological responses to climatic warming are expected to occur in polar marine regions, where temperature increases have been the greatest and sea ice provides a sensitive mechanism by which climatic conditions affect sympagic (i.e., with ice) species. Population-level effects of climatic change, however, remain difficult to quantify. We used a flexible extension of Cormack-Jolly-Seber capture-recapture models to estimate population size and survival for polar bears (Ursus maritimus), one of the most ice-dependent of Arctic marine mammals. We analyzed data for polar bears captured from 1984 to 2004 along the western coast of Hudson Bay and in the community of Churchill, Manitoba, Canada. The Western Hudson Bay polar bear population declined from 1,194 (95% CI = 1,020-1,368) in 1987 to 935 (95% CI = 794-1,076) in 2004. Total apparent survival of prime-adult polar bears (5-19 yr) was stable for females (0.93; 95% CI = 0.91-0.94) and males (0.90; 95% CI = 0.88-0.91). Survival of juvenile, subadult, and senescent-adult polar bears was correlated with spring sea ice breakup date, which was variable among years and occurred approximately 3 weeks earlier in 2004 than in 1984. We propose that this correlation provides evidence for a causal association between earlier sea ice breakup (due to climatic warming) and decreased polar bear survival. It may also explain why Churchill, like other communities along the western coast of Hudson Bay, has experienced an increase in human-polar bear interactions in recent years. Earlier sea ice breakup may have resulted in a larger number of nutritionally stressed polar bears, which are encroaching on human habitations in search of supplemental food. Because western Hudson Bay is near the southern limit of the species' range, our findings may foreshadow the demographic responses and management challenges that more northerly polar bear populations will experience if climatic warming in the Arctic continues as projected.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2006-180","issn":"0022541X","usgsCitation":"Regehr, E., Lunn, N., Amstrup, S.C., and Stirling, I., 2007, Effects of earlier sea ice breakup on survival and population size of polar bears in western Hudson Bay: Journal of Wildlife Management, v. 71, no. 8, p. 2673-2683, https://doi.org/10.2193/2006-180.","startPage":"2673","endPage":"2683","numberOfPages":"11","costCenters":[],"links":[{"id":212262,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2006-180"},{"id":239724,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"71","issue":"8","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"505a06d8e4b0c8380cd5143f","contributors":{"authors":[{"text":"Regehr, E.V.","contributorId":90937,"corporation":false,"usgs":true,"family":"Regehr","given":"E.V.","affiliations":[],"preferred":false,"id":431493,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lunn, N.J.","contributorId":42920,"corporation":false,"usgs":true,"family":"Lunn","given":"N.J.","email":"","affiliations":[],"preferred":false,"id":431491,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Amstrup, Steven C.","contributorId":67034,"corporation":false,"usgs":false,"family":"Amstrup","given":"Steven","email":"","middleInitial":"C.","affiliations":[{"id":13182,"text":"Polar Bears International","active":true,"usgs":false}],"preferred":false,"id":431492,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stirling, I.","contributorId":103615,"corporation":false,"usgs":false,"family":"Stirling","given":"I.","email":"","affiliations":[],"preferred":false,"id":431494,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031040,"text":"70031040 - 2007 - Prey density and the behavioral flexibility of a marine predator: The common murre (<i>Uria aalge</i>)","interactions":[],"lastModifiedDate":"2018-08-19T20:05:57","indexId":"70031040","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Prey density and the behavioral flexibility of a marine predator: The common murre (<i>Uria aalge</i>)","docAbstract":"<p>Flexible time budgets allow individual animals to buffer the effects of variable food availability by allocating more time to foraging when food density decreases. This trait should be especially important for marine predators that forage on patchy and ephemeral food resources. We examined flexible time allocation by a long-lived marine predator, the Common Murre (Uria aalge), using data collected in a five-year study at three colonies in Alaska (USA) with contrasting environmental conditions. Annual hydroacoustic surveys revealed an order-of-magnitude variation in food density among the 15 colony-years of study. We used data on parental time budgets and local prey density to test predictions from two hypotheses: Hypothesis A, the colony attendance of seabirds varies nonlinearly with food density; and Hypothesis B, flexible time allocation of parent murres buffers chicks against variable food availability. Hypothesis A was supported; colony attendance by murres was positively correlated with food over a limited range of poor-to-moderate food densities, but independent of food over a broader range of higher densities. This is the first empirical evidence for a nonlinear response of a marine predator's time budget to changes in prey density. Predictions from Hypothesis B were largely supported: (1) chick-feeding rates were fairly constant over a wide range of densities and only dropped below 3.5 meals per day at the low end of prey density, and (2) there was a nonlinear relationship between chick-feeding rates and time spent at the colony, with chick-feeding rates only declining after time at the colony by the nonbrooding parent was reduced to a minimum. The ability of parents to adjust their foraging time by more than 2 h/d explains why they were able to maintain chick-feeding rates of more than 3.5 meals/d across a 10-fold range in local food density. ?? 2007 by the Ecological Society of America.</p>","language":"English","publisher":"Ecological Society of America","doi":"10.1890/06-1695.1","issn":"00129658","usgsCitation":"Harding, A., Piatt, J.F., Schmutz, J.A., Shultz, M., van Pelt, T.I., Kettle, A.B., and Speckman, S., 2007, Prey density and the behavioral flexibility of a marine predator: The common murre (<i>Uria aalge</i>): Ecology, v. 88, no. 8, p. 2024-2033, https://doi.org/10.1890/06-1695.1.","productDescription":"10 p.","startPage":"2024","endPage":"2033","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":238809,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211510,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/06-1695.1"}],"volume":"88","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8b7ce4b0c8380cd7e275","contributors":{"authors":[{"text":"Harding, A.M.A.","contributorId":29088,"corporation":false,"usgs":true,"family":"Harding","given":"A.M.A.","email":"","affiliations":[],"preferred":false,"id":429736,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Piatt, John F. 0000-0002-4417-5748 jpiatt@usgs.gov","orcid":"https://orcid.org/0000-0002-4417-5748","contributorId":3025,"corporation":false,"usgs":true,"family":"Piatt","given":"John","email":"jpiatt@usgs.gov","middleInitial":"F.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":429738,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schmutz, Joel A. 0000-0002-6516-0836 jschmutz@usgs.gov","orcid":"https://orcid.org/0000-0002-6516-0836","contributorId":1805,"corporation":false,"usgs":true,"family":"Schmutz","given":"Joel","email":"jschmutz@usgs.gov","middleInitial":"A.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":429735,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Shultz, M.T.","contributorId":62006,"corporation":false,"usgs":true,"family":"Shultz","given":"M.T.","email":"","affiliations":[],"preferred":false,"id":429737,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"van Pelt, Thomas I.","contributorId":13392,"corporation":false,"usgs":true,"family":"van Pelt","given":"Thomas","email":"","middleInitial":"I.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":false,"id":429734,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Kettle, Arthur B.","contributorId":98064,"corporation":false,"usgs":false,"family":"Kettle","given":"Arthur","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":429739,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Speckman, Suzann G.","contributorId":88217,"corporation":false,"usgs":true,"family":"Speckman","given":"Suzann G.","affiliations":[],"preferred":false,"id":429740,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70031038,"text":"70031038 - 2007 - Integrating laboratory creep compaction data with numerical fault models: A Bayesian framework","interactions":[],"lastModifiedDate":"2023-07-27T12:24:12.666509","indexId":"70031038","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2314,"text":"Journal of Geophysical Research B: Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Integrating laboratory creep compaction data with numerical fault models: A Bayesian framework","docAbstract":"<div class=\"\"><div class=\"article-section__content en main\"><p><span class=\"paraNumber\">[1]<span>&nbsp;</span></span>We developed a robust Bayesian inversion scheme to plan and analyze laboratory creep compaction experiments. We chose a simple creep law that features the main parameters of interest when trying to identify rate-controlling mechanisms from experimental data. By integrating the chosen creep law or an approximation thereof, one can use all the data, either simultaneously or in overlapping subsets, thus making more complete use of the experiment data and propagating statistical variations in the data through to the final rate constants. Despite the nonlinearity of the problem, with this technique one can retrieve accurate estimates of both the stress exponent and the activation energy, even when the porosity time series data are noisy. Whereas adding observation points and/or experiments reduces the uncertainty on all parameters, enlarging the range of temperature or effective stress significantly reduces the covariance between stress exponent and activation energy. We apply this methodology to hydrothermal creep compaction data on quartz to obtain a quantitative, semiempirical law for fault zone compaction in the interseismic period. Incorporating this law into a simple direct rupture model, we find marginal distributions of the time to failure that are robust with respect to errors in the initial fault zone porosity.</p></div></div>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006JB004792","issn":"01480227","usgsCitation":"Fitzenz, D., Jalobeanu, A., and Hickman, S., 2007, Integrating laboratory creep compaction data with numerical fault models: A Bayesian framework: Journal of Geophysical Research B: Solid Earth, v. 112, no. 8, 18 p., https://doi.org/10.1029/2006JB004792.","productDescription":"18 p.","costCenters":[],"links":[{"id":477346,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006jb004792","text":"Publisher Index Page"},{"id":238776,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"112","issue":"8","noUsgsAuthors":false,"publicationDate":"2007-08-14","publicationStatus":"PW","scienceBaseUri":"505a3c7be4b0c8380cd62d89","contributors":{"authors":[{"text":"Fitzenz, D.D.","contributorId":61218,"corporation":false,"usgs":true,"family":"Fitzenz","given":"D.D.","email":"","affiliations":[],"preferred":false,"id":429720,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jalobeanu, A.","contributorId":31197,"corporation":false,"usgs":true,"family":"Jalobeanu","given":"A.","affiliations":[],"preferred":false,"id":429719,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hickman, S.H. 0000-0003-2075-9615","orcid":"https://orcid.org/0000-0003-2075-9615","contributorId":16027,"corporation":false,"usgs":true,"family":"Hickman","given":"S.H.","affiliations":[],"preferred":false,"id":429718,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031033,"text":"70031033 - 2007 - Invasive plants and their ecological strategies: Prediction and explanation of woody plant invasion in New England","interactions":[],"lastModifiedDate":"2012-03-12T17:21:16","indexId":"70031033","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1399,"text":"Diversity and Distributions","active":true,"publicationSubtype":{"id":10}},"title":"Invasive plants and their ecological strategies: Prediction and explanation of woody plant invasion in New England","docAbstract":"Effective management of introduced species requires the early identification of species that pose a significant threat of becoming invasive. To better understand the invasive ecology of species in New England, USA, we compiled a character data set with which to compare non-native species that are known invaders to non-native species that are not currently known to be invasive. In contrast to previous biological trait-based models, we employed a Bayesian hierarchical analysis to identify sets of plant traits associated with invasiveness for each of three growth forms (vines, shrubs, and trees). The resulting models identify a suite of 'invasive traits' highlighting the ecology associated with invasiveness for each of three growth forms. The most effective predictors of invasiveness that emerged from our model were 'invasive elsewhere', 'fast growth rate', 'native latitudinal range', and 'growth form'. The contrast among growth forms was pronounced. For example, 'wind dispersal' was positively correlated with invasiveness in trees, but negatively correlated in shrubs and vines. The predictive model was able to correctly classify invasive plants 67% of the time (22/33), and non-invasive plants 95% of the time (204/215). A number of potential future invasive species in New England that deserve management consideration were identified. ?? 2007 The Authors.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Diversity and Distributions","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1472-4642.2007.00381.x","issn":"13669516","usgsCitation":"Herron, P., Martine, C., Latimer, A., and Leicht-Young, S.A., 2007, Invasive plants and their ecological strategies: Prediction and explanation of woody plant invasion in New England: Diversity and Distributions, v. 13, no. 5, p. 633-644, https://doi.org/10.1111/j.1472-4642.2007.00381.x.","startPage":"633","endPage":"644","numberOfPages":"12","costCenters":[],"links":[{"id":477238,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1472-4642.2007.00381.x","text":"Publisher Index Page"},{"id":211423,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1472-4642.2007.00381.x"},{"id":238709,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"13","issue":"5","noUsgsAuthors":false,"publicationDate":"2007-06-05","publicationStatus":"PW","scienceBaseUri":"505a3e24e4b0c8380cd63b37","contributors":{"authors":[{"text":"Herron, P.M.","contributorId":17040,"corporation":false,"usgs":true,"family":"Herron","given":"P.M.","email":"","affiliations":[],"preferred":false,"id":429703,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Martine, C.T.","contributorId":20542,"corporation":false,"usgs":true,"family":"Martine","given":"C.T.","email":"","affiliations":[],"preferred":false,"id":429704,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Latimer, A.M.","contributorId":24167,"corporation":false,"usgs":true,"family":"Latimer","given":"A.M.","email":"","affiliations":[],"preferred":false,"id":429705,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Leicht-Young, S. A.","contributorId":41648,"corporation":false,"usgs":true,"family":"Leicht-Young","given":"S.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":429706,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70032179,"text":"70032179 - 2007 - Aquifer-scale controls on the distribution of nitrate and ammonium in ground water near La Pine, Oregon, USA","interactions":[],"lastModifiedDate":"2023-10-03T11:25:27.364711","indexId":"70032179","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Aquifer-scale controls on the distribution of nitrate and ammonium in ground water near La Pine, Oregon, USA","docAbstract":"<p>Geochemical and isotopic tools were applied at aquifer, transect, and subtransect scales to provide a framework for understanding sources, transport, and fate of dissolved inorganic N in a sandy aquifer near La Pine, Oregon. NO3 is a common contaminant in shallow ground water in this area, whereas high concentrations of NH4-N (up to 39 mg/L) are present in deep ground water. N concentrations, N/Cl ratios, tracer-based apparent ground-water ages, N isotope data, and hydraulic gradients indicate that septic tank effluent is the primary source of NO3. N isotope data, N/Cl and N/C relations, 3H data, and hydraulic considerations point to a natural, sedimentary organic matter source for the high concentrations of NH4, and are inconsistent with an origin as septic tank N. Low recharge rates and flow velocities have largely restricted anthropogenic NO3 to isolated plumes within several meters of the water table. A variety of geochemical and isotopic data indicate that denitrification also affects NO3 gradients in the aquifer. Ground water in the La Pine aquifer evolves from oxic to increasingly reduced conditions. Suboxic conditions are achieved after about 15-30 y of transport below the water table. NO3 is denitrified near the oxic/suboxic boundary. Denitrification in the La Pine aquifer is characterized well at the aquifer scale with a redox boundary approach that inherently captures spatial variability in the distribution of electron donors.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.jhydrol.2006.09.013","issn":"00221694","usgsCitation":"Hinkle, S.R., Bohlke, J.K., Duff, J.H., Morgan, D.S., and Weick, R.J., 2007, Aquifer-scale controls on the distribution of nitrate and ammonium in ground water near La Pine, Oregon, USA: Journal of Hydrology, v. 333, no. 2-4, p. 486-503, https://doi.org/10.1016/j.jhydrol.2006.09.013.","productDescription":"18 p.","startPage":"486","endPage":"503","numberOfPages":"18","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":242337,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Oregon","city":"La Pine","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -121.75,43.5 ], [ -121.75,44 ], [ -121.33333333333333,44 ], [ -121.33333333333333,43.5 ], [ -121.75,43.5 ] ] ] } } ] }","volume":"333","issue":"2-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ed25e4b0c8380cd4965e","contributors":{"authors":[{"text":"Hinkle, Stephen R. srhinkle@usgs.gov","contributorId":1171,"corporation":false,"usgs":true,"family":"Hinkle","given":"Stephen","email":"srhinkle@usgs.gov","middleInitial":"R.","affiliations":[{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true}],"preferred":true,"id":434887,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bohlke, John Karl 0000-0001-5693-6455 jkbohlke@usgs.gov","orcid":"https://orcid.org/0000-0001-5693-6455","contributorId":127841,"corporation":false,"usgs":true,"family":"Bohlke","given":"John","email":"jkbohlke@usgs.gov","middleInitial":"Karl","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":false,"id":434888,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Duff, John H. jhduff@usgs.gov","contributorId":961,"corporation":false,"usgs":true,"family":"Duff","given":"John","email":"jhduff@usgs.gov","middleInitial":"H.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":434886,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Morgan, David S.","contributorId":73181,"corporation":false,"usgs":true,"family":"Morgan","given":"David","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":434885,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Weick, Rodney J.","contributorId":79560,"corporation":false,"usgs":true,"family":"Weick","given":"Rodney","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":434889,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031591,"text":"70031591 - 2007 - Using topographic lidar data to delineate the North Carolina Shoreline","interactions":[],"lastModifiedDate":"2017-10-04T18:58:37","indexId":"70031591","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Using topographic lidar data to delineate the North Carolina Shoreline","docAbstract":"<p>In North Carolina, shoreline change rates are an important component of the state's coastal management program. To enhance methods of measuring shoreline change, the NC Division of Coastal Management (DCM) is considering using mean high water (MHW) shorelines extracted from lidar data together with traditional wet/dry shorelines digitized from aerial photography. To test their compatibility, a wet/dry line and MHW shoreline derived from a concurrent 2004 oceanfront photography and lidar dataset were compared along a distance of 244 km. Results show that the MHW shoreline was seaward of the wet/dry shoreline by 2.82 m on average, and that this offset biased shoreline change rates by an average of 0.05 m/yr. The offset was greatest on low-sloping beaches experiencing higher water levels at the time of photography, but overall was small enough to suggest that the MHW shoreline can be a reliable substitute for the wet/dry shoreline.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes","conferenceLocation":"New Orleans, LA","language":"English","publisher":"American Society of Civil Engineers","doi":"10.1061/40926(239)144","isbn":"0784409269; 9780784409268","usgsCitation":"Limber, P., List, J., Warren, J.D., Farris, A., and Weber, K., 2007, Using topographic lidar data to delineate the North Carolina Shoreline, <i>in</i> Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes, New Orleans, LA, p. 1837-1850, https://doi.org/10.1061/40926(239)144.","productDescription":"14 p.","startPage":"1837","endPage":"1850","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true},{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":240002,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"North Carolina","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -78.6749,33.841 ], [ -78.6749,36.5882 ], [ -75.46,36.5882 ], [ -75.46,33.841 ], [ -78.6749,33.841 ] ] ] } } ] }","noUsgsAuthors":false,"publicationDate":"2012-04-26","publicationStatus":"PW","scienceBaseUri":"505bc0bae4b08c986b32a2b9","contributors":{"authors":[{"text":"Limber, Patrick W.","contributorId":38904,"corporation":false,"usgs":true,"family":"Limber","given":"Patrick W.","affiliations":[],"preferred":false,"id":432244,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"List, Jeffrey H. jlist@usgs.gov","contributorId":2416,"corporation":false,"usgs":true,"family":"List","given":"Jeffrey H.","email":"jlist@usgs.gov","affiliations":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"preferred":false,"id":432241,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Warren, Jeffrey D.","contributorId":21869,"corporation":false,"usgs":true,"family":"Warren","given":"Jeffrey","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":432242,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Farris, Amy S.","contributorId":28075,"corporation":false,"usgs":true,"family":"Farris","given":"Amy S.","affiliations":[],"preferred":false,"id":432243,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Weber, Kathryn M.","contributorId":83387,"corporation":false,"usgs":true,"family":"Weber","given":"Kathryn M.","affiliations":[],"preferred":false,"id":432245,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031572,"text":"70031572 - 2007 - Linking ground-water age and chemistry data along flow paths: Implications for trends and transformations of nitrate and pesticides","interactions":[],"lastModifiedDate":"2018-09-26T15:48:13","indexId":"70031572","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2233,"text":"Journal of Contaminant Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Linking ground-water age and chemistry data along flow paths: Implications for trends and transformations of nitrate and pesticides","docAbstract":"<p>Tracer-based ground-water ages, along with the concentrations of pesticides, nitrogen species, and other redox-active constituents, were used to evaluate the trends and transformations of agricultural chemicals along flow paths in diverse hydrogeologic settings. A range of conditions affecting the transformation of nitrate and pesticides (e.g., thickness of unsaturated zone, redox conditions) was examined at study sites in Georgia, North Carolina, Wisconsin, and California. Deethylatrazine (DEA), a transformation product of atrazine, was typically present at concentrations higher than those of atrazine at study sites with thick unsaturated zones but not at sites with thin unsaturated zones. Furthermore, the fraction of atrazine plus DEA that was present as DEA did not increase as a function of ground-water age. These findings suggest that atrazine degradation occurs primarily in the unsaturated zone with little or no degradation in the saturated zone. Similar observations were also made for metolachlor and alachlor. The fraction of the initial nitrate concentration found as excess N2 (N2 derived from denitrification) increased with ground-water age only at the North Carolina site, where oxic conditions were generally limited to the top 5??m of saturated thickness. Historical trends in fluxes to ground water were evaluated by relating the times of recharge of ground-water samples, estimated using chlorofluorocarbon concentrations, with concentrations of the parent compound at the time of recharge, estimated by summing the molar concentrations of the parent compound and its transformation products in the age-dated sample. Using this approach, nitrate concentrations were estimated to have increased markedly from 1960 to the present at all study sites. Trends in concentrations of atrazine, metolachlor, alachlor, and their degradates were related to the timing of introduction and use of these compounds. Degradates, and to a lesser extent parent compounds, were detected in ground water dating back to the time these compounds were introduced.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.jconhyd.2007.05.007","issn":"01697722","usgsCitation":"Tesoriero, A., Saad, D.A., Burow, K., Frick, E.A., Puckett, L., and Barbash, J., 2007, Linking ground-water age and chemistry data along flow paths: Implications for trends and transformations of nitrate and pesticides: Journal of Contaminant Hydrology, v. 94, no. 1-2, p. 139-155, https://doi.org/10.1016/j.jconhyd.2007.05.007.","productDescription":"17 p.","startPage":"139","endPage":"155","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":622,"text":"Washington Water Science Center","active":true,"usgs":true}],"links":[{"id":239700,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212242,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jconhyd.2007.05.007"}],"volume":"94","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a47d3e4b0c8380cd679e0","contributors":{"authors":[{"text":"Tesoriero, A. J.","contributorId":99127,"corporation":false,"usgs":true,"family":"Tesoriero","given":"A. J.","affiliations":[],"preferred":false,"id":432179,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Saad, D. A.","contributorId":85212,"corporation":false,"usgs":true,"family":"Saad","given":"D.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":432178,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Burow, K.R. 0000-0001-6006-6667","orcid":"https://orcid.org/0000-0001-6006-6667","contributorId":48283,"corporation":false,"usgs":true,"family":"Burow","given":"K.R.","affiliations":[],"preferred":false,"id":432175,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Frick, E. A.","contributorId":61840,"corporation":false,"usgs":true,"family":"Frick","given":"E.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":432176,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Puckett, L.J.","contributorId":27503,"corporation":false,"usgs":true,"family":"Puckett","given":"L.J.","email":"","affiliations":[],"preferred":false,"id":432174,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Barbash, J.E.","contributorId":62783,"corporation":false,"usgs":true,"family":"Barbash","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":432177,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031569,"text":"70031569 - 2007 - Time-optimum packet scheduling for many-to-one routing in wireless sensor networks","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031569","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Time-optimum packet scheduling for many-to-one routing in wireless sensor networks","docAbstract":"This paper studies the WSN application scenario with periodical traffic from all sensors to a sink. We present a time-optimum and energy-efficient packet scheduling algorithm and its distributed implementation. We first give a general many-to-one packet scheduling algorithm for wireless networks, and then prove that it is time-optimum and costs max(2N(u1) - 1, N(u 0) -1) time slots, assuming each node reports one unit of data in each round. Here N(u0) is the total number of sensors, while N(u 1) denotes the number of sensors in a sink's largest branch subtree. With a few adjustments, we then show that our algorithm also achieves time-optimum scheduling in heterogeneous scenarios, where each sensor reports a heterogeneous amount of data in each round. Then we give a distributed implementation to let each node calculate its duty-cycle locally and maximize efficiency globally. In this packet scheduling algorithm, each node goes to sleep whenever it is not transceiving, so that the energy waste of idle listening is also eliminated. Finally, simulations are conducted to evaluate network performance using the Qualnet simulator. Among other contributions, our study also identifies the maximum reporting frequency that a deployed sensor network can handle. ??2006 IEEE.","largerWorkTitle":"2006 IEEE International Conference on Mobile Ad Hoc and Sensor Systems, MASS","conferenceTitle":"2006 IEEE International Conference on Mobile Ad Hoc and Sensor Sysetems, MASS","conferenceDate":"9 October 2006 through 12 October 2006","conferenceLocation":"Vancouver, BC","language":"English","doi":"10.1109/MOBHOC.2006.278656","isbn":"1424405076; 9781424405077","usgsCitation":"Song, W., Yuan, F., and LaHuser, R., 2007, Time-optimum packet scheduling for many-to-one routing in wireless sensor networks, <i>in</i> 2006 IEEE International Conference on Mobile Ad Hoc and Sensor Systems, MASS, Vancouver, BC, 9 October 2006 through 12 October 2006, p. 81-90, https://doi.org/10.1109/MOBHOC.2006.278656.","startPage":"81","endPage":"90","numberOfPages":"10","costCenters":[],"links":[{"id":212182,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1109/MOBHOC.2006.278656"},{"id":239632,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb3d4e4b08c986b325ff2","contributors":{"authors":[{"text":"Song, W.-Z.","contributorId":23334,"corporation":false,"usgs":true,"family":"Song","given":"W.-Z.","email":"","affiliations":[],"preferred":false,"id":432165,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Yuan, F.","contributorId":104287,"corporation":false,"usgs":true,"family":"Yuan","given":"F.","email":"","affiliations":[],"preferred":false,"id":432167,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"LaHuser, R.","contributorId":80900,"corporation":false,"usgs":true,"family":"LaHuser","given":"R.","email":"","affiliations":[],"preferred":false,"id":432166,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030785,"text":"70030785 - 2007 - High arsenic concentrations and enriched sulfur and oxygen isotopes in a fractured-bedrock ground-water system","interactions":[],"lastModifiedDate":"2012-03-12T17:21:03","indexId":"70030785","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":"High arsenic concentrations and enriched sulfur and oxygen isotopes in a fractured-bedrock ground-water system","docAbstract":"Ground water with high arsenic concentrations (up to 26.6????mol L- 1) has sulfate enriched in 34S and 18O in the fractured-bedrock, ground-water system of the Kelly's Cove watershed, Northport, Maine, USA. The ranges of sulfur and oxygen isotope values in aqueous sulfate, ??34S[SO4] and ??18O[SO4], at the Kelly's Cove watershed are + 3.4 to + 4.9??? and - 2.0 to + 6.7???, respectively. These isotope values are strikingly similar to those of the Goose River, Maine watershed which has ??34S[SO4] and ??18O[SO4] ranges of + 3.7 to + 4.6 ??? and - 2.6 to + 7.5???, respectively. In both systems, high arsenic concentrations occur with high ??34S[SO4] and ??18O[SO4] values, yet redox conditions and underlying rock types are quite different. The isotope values of sulfide minerals, ??34S[min], from four bedrock cores vary over short distances and range from - 5.1 to + 7.5???. The ??34S[SO4] values are controlled by the ??34S[min] values with minor input of atmospheric SO4. The much narrower range in ??34S[SO4] values than ??34S[min] values is probably due to sufficient ground-water mixing at a scale greater than the ??34S[min] variability. The ??34S[SO4] values are about 2??? higher than the average ??34S[min] value and fall within the range of ??34S[min] values, indicating only minor fractionation due to bacterial reduction of SO4. The highest ??18O[SO4] values were measured in the downgradient, confined, arsenic-rich ground water. High ??18O[SO4] values there cannot be due to aeration by atmospheric oxygen, but may arise from reoxidation of reduced SO4 products. The enrichment factors of ??18O in SO4 compared to H2O, + 7.2 to + 15.5???, in the Kelly's Cove ground water and the negligible 34S enrichment is very similar to those derived from experimental data of anaerobic sulfide oxidation in the presence of Mn and Fe oxides. Sea level at the Kelly's Cove watershed was approximately 80??m above present sea level about 13 000??years before present, imposing reducing conditions on that area of the watershed. Sea level dropped approximately 60??m below present sea level about 11 000??years before present, allowing for possible oxidation of sulfide minerals and precipitation of arsenic in ferric oxyhydroxides during aeration of the ground-water system. Under present redox conditions, there is evidence that bacteria reduction of ferric oxyhydroxides releases arsenic. The fractionation of 18O in the SO4 during anaerobic oxidation of sulfide in the presence of Mn and Fe oxides and subsequent release of arsenic during Mn and Fe oxide reduction may explain the relationship between high arsenic concentrations and elevated 18O[SO4] at Kelly's Cove. ?? 2007 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Chemical Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.chemgeo.2007.04.003","issn":"00092541","usgsCitation":"Lipfert, G., Sidle, W., Reeve, A., Ayuso, R., and Boyce, A., 2007, High arsenic concentrations and enriched sulfur and oxygen isotopes in a fractured-bedrock ground-water system: Chemical Geology, v. 242, no. 3-4, p. 385-399, https://doi.org/10.1016/j.chemgeo.2007.04.003.","startPage":"385","endPage":"399","numberOfPages":"15","costCenters":[],"links":[{"id":211686,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.chemgeo.2007.04.003"},{"id":239026,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"242","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a30aee4b0c8380cd5d859","contributors":{"authors":[{"text":"Lipfert, G.","contributorId":53135,"corporation":false,"usgs":true,"family":"Lipfert","given":"G.","email":"","affiliations":[],"preferred":false,"id":428663,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sidle, W.C.","contributorId":93911,"corporation":false,"usgs":true,"family":"Sidle","given":"W.C.","email":"","affiliations":[],"preferred":false,"id":428665,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Reeve, A.S.","contributorId":64446,"corporation":false,"usgs":true,"family":"Reeve","given":"A.S.","email":"","affiliations":[],"preferred":false,"id":428664,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ayuso, R. A. 0000-0002-8496-9534","orcid":"https://orcid.org/0000-0002-8496-9534","contributorId":27079,"corporation":false,"usgs":true,"family":"Ayuso","given":"R. A.","affiliations":[],"preferred":false,"id":428662,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Boyce, A.J.","contributorId":26198,"corporation":false,"usgs":true,"family":"Boyce","given":"A.J.","email":"","affiliations":[],"preferred":false,"id":428661,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031527,"text":"70031527 - 2007 - Evaluation of a non-point source pollution model, AnnAGNPS, in a tropical watershed","interactions":[],"lastModifiedDate":"2012-03-12T17:21:14","indexId":"70031527","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1551,"text":"Environmental Modelling and Software","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of a non-point source pollution model, AnnAGNPS, in a tropical watershed","docAbstract":"Impaired water quality caused by human activity and the spread of invasive plant and animal species has been identified as a major factor of degradation of coastal ecosystems in the tropics. The main goal of this study was to evaluate the performance of AnnAGNPS (Annualized Non-Point Source Pollution Model), in simulating runoff and soil erosion in a 48 km2 watershed located on the Island of Kauai, Hawaii. The model was calibrated and validated using 2 years of observed stream flow and sediment load data. Alternative scenarios of spatial rainfall distribution and canopy interception were evaluated. Monthly runoff volumes predicted by AnnAGNPS compared well with the measured data (R2 = 0.90, P < 0.05); however, up to 60% difference between the actual and simulated runoff were observed during the driest months (May and July). Prediction of daily runoff was less accurate (R2 = 0.55, P < 0.05). Predicted and observed sediment yield on a daily basis was poorly correlated (R2 = 0.5, P < 0.05). For the events of small magnitude, the model generally overestimated sediment yield, while the opposite was true for larger events. Total monthly sediment yield varied within 50% of the observed values, except for May 2004. Among the input parameters the model was most sensitive to the values of ground residue cover and canopy cover. It was found that approximately one third of the watershed area had low sediment yield (0-1 t ha-1 y-1), and presented limited erosion threat. However, 5% of the area had sediment yields in excess of 5 t ha-1 y-1. Overall, the model performed reasonably well, and it can be used as a management tool on tropical watersheds to estimate and compare sediment loads, and identify \"hot spots\" on the landscape. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Modelling and Software","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.envsoft.2006.12.001","issn":"13648152","usgsCitation":"Polyakov, V., Fares, A., Kubo, D., Jacobi, J., and Smith, C., 2007, Evaluation of a non-point source pollution model, AnnAGNPS, in a tropical watershed: Environmental Modelling and Software, v. 22, no. 11, p. 1617-1627, https://doi.org/10.1016/j.envsoft.2006.12.001.","startPage":"1617","endPage":"1627","numberOfPages":"11","costCenters":[],"links":[{"id":212537,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.envsoft.2006.12.001"},{"id":240034,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"22","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0c34e4b0c8380cd52a90","contributors":{"authors":[{"text":"Polyakov, V.","contributorId":96900,"corporation":false,"usgs":true,"family":"Polyakov","given":"V.","email":"","affiliations":[],"preferred":false,"id":431963,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fares, A.","contributorId":12697,"corporation":false,"usgs":true,"family":"Fares","given":"A.","email":"","affiliations":[],"preferred":false,"id":431960,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kubo, D.","contributorId":52401,"corporation":false,"usgs":true,"family":"Kubo","given":"D.","email":"","affiliations":[],"preferred":false,"id":431961,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jacobi, J.","contributorId":97321,"corporation":false,"usgs":true,"family":"Jacobi","given":"J.","email":"","affiliations":[],"preferred":false,"id":431964,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Smith, C.","contributorId":96429,"corporation":false,"usgs":true,"family":"Smith","given":"C.","affiliations":[],"preferred":false,"id":431962,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031352,"text":"70031352 - 2007 - Stability and uncertainty of finite-fault slip inversions: Application to the 2004 Parkfield, California, earthquake","interactions":[],"lastModifiedDate":"2016-01-27T14:16:57","indexId":"70031352","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Stability and uncertainty of finite-fault slip inversions: Application to the 2004 Parkfield, California, earthquake","docAbstract":"<p>The 2004 Parkfield, California, earthquake is used to investigate stability and uncertainty aspects of the finite-fault slip inversion problem with different <i>a priori</i> model assumptions. We utilize records from 54 strong ground motion stations and 13 continuous, 1-Hz sampled, geodetic instruments. Two inversion procedures are compared: a linear least-squares subfault-based methodology and a nonlinear global search algorithm. These two methods encompass a wide range of the different approaches that have been used to solve the finite-fault slip inversion problem. For the Parkfield earthquake and the inversion of velocity or displacement waveforms, near-surface related site response (top 100 m, frequencies above 1 Hz) is shown to not significantly affect the solution. Results are also insensitive to selection of slip rate functions with similar duration and to subfault size if proper stabilizing constraints are used. The linear and nonlinear formulations yield consistent results when the same limitations in model parameters are in place and the same inversion norm is used. However, the solution is sensitive to the choice of inversion norm, the bounds on model parameters, such as rake and rupture velocity, and the size of the model fault plane. The geodetic data set for Parkfield gives a slip distribution different from that of the strong-motion data, which may be due to the spatial limitation of the geodetic stations and the bandlimited nature of the strong-motion data. Cross validation and the bootstrap method are used to set limits on the upper bound for rupture velocity and to derive mean slip models and standard deviations in model parameters. This analysis shows that slip on the northwestern half of the Parkfield rupture plane from the inversion of strong-motion data is model dependent and has a greater uncertainty than slip near the hypocenter.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the Seismological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Seismological Society of America","publisherLocation":"Stanford","doi":"10.1785/0120070080","issn":"00371106","usgsCitation":"Hartzell, S., Liu, P., Mendoza, C., Ji, C., and Larson, K., 2007, Stability and uncertainty of finite-fault slip inversions: Application to the 2004 Parkfield, California, earthquake: Bulletin of the Seismological Society of America, v. 97, no. 6, p. 1911-1934, https://doi.org/10.1785/0120070080.","productDescription":"24 p.","startPage":"1911","endPage":"1934","numberOfPages":"24","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":240060,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212559,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120070080"}],"country":"United States","state":"California","city":"Parkfield","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -120.750732421875,\n              35.84230806912384\n            ],\n            [\n              -120.69854736328125,\n              35.725332497303015\n            ],\n            [\n              -120.64773559570311,\n              35.66399091134812\n            ],\n            [\n              -120.36758422851561,\n              35.649485098277204\n            ],\n            [\n              -120.16708374023438,\n              35.715298012125295\n            ],\n            [\n              -120.16708374023438,\n              35.84564769832635\n            ],\n            [\n              -120.24948120117188,\n              35.97800618085568\n            ],\n            [\n              -120.33462524414061,\n              36.061311571582486\n            ],\n            [\n              -120.49667358398438,\n              36.12900165569652\n            ],\n            [\n              -120.65322875976562,\n              36.12456474813333\n            ],\n            [\n              -120.79055786132812,\n              36.07907198829112\n            ],\n            [\n              -120.80291748046874,\n              35.94910642813857\n            ],\n            [\n              -120.750732421875,\n              35.84230806912384\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"97","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b964be4b08c986b31b40c","contributors":{"authors":[{"text":"Hartzell, S.","contributorId":12603,"corporation":false,"usgs":true,"family":"Hartzell","given":"S.","email":"","affiliations":[],"preferred":false,"id":431167,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Liu, P.","contributorId":98443,"corporation":false,"usgs":true,"family":"Liu","given":"P.","email":"","affiliations":[],"preferred":false,"id":431171,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mendoza, C.","contributorId":82059,"corporation":false,"usgs":true,"family":"Mendoza","given":"C.","email":"","affiliations":[],"preferred":false,"id":431169,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ji, C.","contributorId":31093,"corporation":false,"usgs":true,"family":"Ji","given":"C.","email":"","affiliations":[],"preferred":false,"id":431168,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Larson, K.M.","contributorId":84949,"corporation":false,"usgs":true,"family":"Larson","given":"K.M.","email":"","affiliations":[],"preferred":false,"id":431170,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031010,"text":"70031010 - 2007 - Habitat classification modeling with incomplete data: Pushing the habitat envelope","interactions":[],"lastModifiedDate":"2012-03-12T17:21:15","indexId":"70031010","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1450,"text":"Ecological Applications","active":true,"publicationSubtype":{"id":10}},"title":"Habitat classification modeling with incomplete data: Pushing the habitat envelope","docAbstract":"Habitat classification models (HCMs) are invaluable tools for species conservation, land-use planning, reserve design, and metapopulation assessments, particularly at broad spatial scales. However, species occurrence data are often lacking and typically limited to presence points at broad scales. This lack of absence data precludes the use of many statistical techniques for HCMs. One option is to generate pseudo-absence points so that the many available statistical modeling tools can be used. Traditional techniques generate pseudoabsence points at random across broadly defined species ranges, often failing to include biological knowledge concerning the species-habitat relationship. We incorporated biological knowledge of the species-habitat relationship into pseudo-absence points by creating habitat envelopes that constrain the region from which points were randomly selected. We define a habitat envelope as an ecological representation of a species, or species feature's (e.g., nest) observed distribution (i.e., realized niche) based on a single attribute, or the spatial intersection of multiple attributes. We created HCMs for Northern Goshawk (Accipiter gentilis atricapillus) nest habitat during the breeding season across Utah forests with extant nest presence points and ecologically based pseudo-absence points using logistic regression. Predictor variables were derived from 30-m USDA Landfire and 250-m Forest Inventory and Analysis (FIA) map products. These habitat-envelope-based models were then compared to null envelope models which use traditional practices for generating pseudo-absences. Models were assessed for fit and predictive capability using metrics such as kappa, thresholdindependent receiver operating characteristic (ROC) plots, adjusted deviance (Dadj2), and cross-validation, and were also assessed for ecological relevance. For all cases, habitat envelope-based models outperformed null envelope models and were more ecologically relevant, suggesting that incorporating biological knowledge into pseudo-absence point generation is a powerful tool for species habitat assessments. Furthermore, given some a priori knowledge of the species-habitat relationship, ecologically based pseudo-absence points can be applied to any species, ecosystem, data resolution, and spatial extent. ?? 2007 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/06-1312.1","issn":"10510761","usgsCitation":"Zarnetske, P., Edwards, T., and Moisen, G.G., 2007, Habitat classification modeling with incomplete data: Pushing the habitat envelope: Ecological Applications, v. 17, no. 6, p. 1714-1726, https://doi.org/10.1890/06-1312.1.","startPage":"1714","endPage":"1726","numberOfPages":"13","costCenters":[],"links":[{"id":211537,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/06-1312.1"},{"id":238839,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2f03e4b0c8380cd5c9f7","contributors":{"authors":[{"text":"Zarnetske, P.L.","contributorId":27257,"corporation":false,"usgs":true,"family":"Zarnetske","given":"P.L.","email":"","affiliations":[],"preferred":false,"id":429622,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Edwards, T.C. Jr. 0000-0002-0773-0909","orcid":"https://orcid.org/0000-0002-0773-0909","contributorId":76486,"corporation":false,"usgs":true,"family":"Edwards","given":"T.C.","suffix":"Jr.","affiliations":[],"preferred":false,"id":429623,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Moisen, Gretchen G.","contributorId":15781,"corporation":false,"usgs":false,"family":"Moisen","given":"Gretchen","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":429621,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030724,"text":"70030724 - 2007 - Joint inversion of high-frequency surface waves with fundamental and higher modes","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030724","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2165,"text":"Journal of Applied Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"Joint inversion of high-frequency surface waves with fundamental and higher modes","docAbstract":"Joint inversion of multimode surface waves for estimating the shear (S)-wave velocity has received much attention in recent years. In this paper, we first analyze sensitivity of phase velocities of multimodes of surface waves for a six-layer earth model, and then we invert surface-wave dispersion curves of the theoretical model and a real-world example. Sensitivity analysis shows that fundamental mode data are more sensitive to the S-wave velocities of shallow layers and are concentrated on a very narrow frequency band, while higher mode data are more sensitive to the parameters of relatively deeper layers and are distributed over a wider frequency band. These properties provide a foundation of using a multimode joint inversion to define S-wave velocities. Inversion results of both synthetic data and a real-world example demonstrate that joint inversion with the damped least-square method and the singular-value decomposition technique to invert high-frequency surface waves with fundamental and higher mode data simultaneously can effectively reduce the ambiguity and improve the accuracy of S-wave velocities. ?? 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Applied Geophysics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jappgeo.2007.02.004","issn":"09269851","usgsCitation":"Luo, Y., Xia, J., Liu, J., Liu, Q., and Xu, S., 2007, Joint inversion of high-frequency surface waves with fundamental and higher modes: Journal of Applied Geophysics, v. 62, no. 4, p. 375-384, https://doi.org/10.1016/j.jappgeo.2007.02.004.","startPage":"375","endPage":"384","numberOfPages":"10","costCenters":[],"links":[{"id":239084,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211737,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jappgeo.2007.02.004"}],"volume":"62","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4003e4b0c8380cd649d1","contributors":{"authors":[{"text":"Luo, Y.","contributorId":28417,"corporation":false,"usgs":true,"family":"Luo","given":"Y.","email":"","affiliations":[],"preferred":false,"id":428399,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Xia, J.","contributorId":63513,"corporation":false,"usgs":true,"family":"Xia","given":"J.","email":"","affiliations":[],"preferred":false,"id":428400,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Liu, J.","contributorId":23672,"corporation":false,"usgs":false,"family":"Liu","given":"J.","affiliations":[],"preferred":false,"id":428398,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Liu, Q.","contributorId":17827,"corporation":false,"usgs":true,"family":"Liu","given":"Q.","email":"","affiliations":[],"preferred":false,"id":428397,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Xu, S.","contributorId":84954,"corporation":false,"usgs":true,"family":"Xu","given":"S.","email":"","affiliations":[],"preferred":false,"id":428401,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70186201,"text":"70186201 - 2007 - Seabirds as indicators of marine ecosystems: Introduction: A modern role for seabirds as indicators","interactions":[],"lastModifiedDate":"2017-03-31T13:14:18","indexId":"70186201","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2663,"text":"Marine Ecology Progress Series","active":true,"publicationSubtype":{"id":10}},"title":"Seabirds as indicators of marine ecosystems: Introduction: A modern role for seabirds as indicators","docAbstract":"<p>A key requirement for implementing ecosystem-based management is to obtain timely information on significant fluctuations in the ecosystem (Botsford et al. 1997). However, obtaining all necessary information about physical and biological changes at appropriate&nbsp;temporal and spatial scales is a daunting task. Intuitively, one might assume that physical data are more important for the interpretation of ecosystem changes than biological data, but analyses of time series data suggest otherwise: physical data are more erratic and&nbsp;often confusing over the short term compared to biological data, which tend to fluctuate less on annual time scales (Hare &amp; Mantua 2000). Even so, biological time-series may also be confusing when coexisting marine species respond differently to ecosystem variability. For example, while warming temperatures in the Gulf of Alaska following the 1976 to 1977 regime shift favored an increase in gadoids and flatfish, a variety of forage fish and pandalid shrimp species virtually disappeared (Anderson &amp; Piatt 1999). Zooplankton communities in the Gulf of Alaska also demonstrated similar patterns of response (Francis et al. 1998). At the basin scale, favorable conditions for salmon in Alaska following the regime shift were matched inversely by poor conditions in the California Current (Francis et al. 1998). In marine birds, subtropical species increased, while subarctic ones decreased during a warming phase in the southern California Bight. Clearly, no single index can tell the whole story accurately. Multi-species, multi-region, and multi-trophic level approaches are needed to quantify fluctuations in marine ecosystem processes and in the distribution and abundance of its inhabitants, to determine critical parameter thresholds and to use this information in management and marine conservation.</p>","language":"English","publisher":"Inter-Research","doi":"10.3354/meps07070","usgsCitation":"Piatt, J.F., Sydeman, W., and Wiese, F., 2007, Seabirds as indicators of marine ecosystems: Introduction: A modern role for seabirds as indicators: Marine Ecology Progress Series, v. 352, p. 199-204, https://doi.org/10.3354/meps07070.","productDescription":"6 p.","startPage":"199","endPage":"204","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":476940,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3354/meps07070","text":"Publisher Index Page"},{"id":338964,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"352","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58df6ac8e4b02ff32c6aea79","contributors":{"authors":[{"text":"Piatt, John F. 0000-0002-4417-5748 jpiatt@usgs.gov","orcid":"https://orcid.org/0000-0002-4417-5748","contributorId":3025,"corporation":false,"usgs":true,"family":"Piatt","given":"John","email":"jpiatt@usgs.gov","middleInitial":"F.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":687861,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sydeman, William J.","contributorId":172574,"corporation":false,"usgs":false,"family":"Sydeman","given":"William J.","affiliations":[],"preferred":false,"id":687862,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wiese, Francis","contributorId":172575,"corporation":false,"usgs":false,"family":"Wiese","given":"Francis","email":"","affiliations":[],"preferred":false,"id":687863,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030027,"text":"70030027 - 2007 - Geohydrologic assessment of fractured crystalline bedrock on the southern part of Manhattan, New York, through the use of advanced borehole geophysical methods","interactions":[],"lastModifiedDate":"2019-10-17T10:07:52","indexId":"70030027","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2323,"text":"Journal of Geophysics and Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Geohydrologic assessment of fractured crystalline bedrock on the southern part of Manhattan, New York, through the use of advanced borehole geophysical methods","docAbstract":"<p><span>Advanced borehole-geophysical methods were used to assess the geohydrology of fractured crystalline bedrock in 31 of 64 boreholes on the southern part of Manhattan Island, NY in preparation of the construction of a new water tunnel. The study area is located in a highly urbanized part of New York City. The boreholes penetrated gneiss, schist, and other crystalline bedrock that has an overall southwest-to northwest-dipping foliation. Most of the fractures intersected are nearly horizontal or have moderate- to high-angle northwest or eastward dip azimuths. Heat-pulse flowmeter logs obtained under nonpumping (ambient) and pumping conditions, together with other geophysical logs, delineated transmissive fracture zones in each borehole. Water-level and flowmeter data suggest the fractured-rock ground-water-flow system is interconnected. The 60 MHz directional borehole-radar logs delineated the location and orientation of several radar reflectors that did not intersect the projection of the borehole. A total of 53 faults intersected by the boreholes have mean orientation populations of N12°W, 66°W and N11°W, 70°E. A total of 77 transmissive fractures delineated using the heat-pulse flowmeter have mean orientations of N11°E, 14°SE (majority) and N23°E, 57°NW (minority). The transmissivity of the bedrock boreholes ranged from 0.7 to 870 feet squared (ft</span><sup>2</sup><span>) per day (0.07 to 81 metres squared (m</span><sup>2</sup><span>) per day).</span></p>","language":"English","publisher":"Oxford Academic","doi":"10.1088/1742-2132/4/3/S02","issn":"17422132","usgsCitation":"Stumm, F., Chu, A., Joesten, P., and Lane, J., 2007, Geohydrologic assessment of fractured crystalline bedrock on the southern part of Manhattan, New York, through the use of advanced borehole geophysical methods: Journal of Geophysics and Engineering, v. 4, no. 3, p. 245-252, https://doi.org/10.1088/1742-2132/4/3/S02.","productDescription":"8 p.","startPage":"245","endPage":"252","numberOfPages":"8","costCenters":[{"id":493,"text":"Office of Ground Water","active":true,"usgs":true}],"links":[{"id":240627,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"New York","city":"Manhattan","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -74.02450561523438,\n              40.69938133866613\n            ],\n            [\n              -73.93386840820312,\n              40.69938133866613\n            ],\n            [\n              -73.93386840820312,\n              40.79977641109269\n            ],\n            [\n              -74.02450561523438,\n              40.79977641109269\n            ],\n            [\n              -74.02450561523438,\n              40.69938133866613\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"4","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-08-31","publicationStatus":"PW","scienceBaseUri":"505a17a0e4b0c8380cd55578","contributors":{"authors":[{"text":"Stumm, F.","contributorId":33928,"corporation":false,"usgs":true,"family":"Stumm","given":"F.","email":"","affiliations":[],"preferred":false,"id":425382,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chu, A.","contributorId":81697,"corporation":false,"usgs":true,"family":"Chu","given":"A.","email":"","affiliations":[],"preferred":false,"id":425385,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Joesten, P. K.","contributorId":62818,"corporation":false,"usgs":true,"family":"Joesten","given":"P. K.","affiliations":[],"preferred":false,"id":425383,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lane, J.W. Jr.","contributorId":66723,"corporation":false,"usgs":true,"family":"Lane","given":"J.W.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":425384,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
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