{"pageNumber":"964","pageRowStart":"24075","pageSize":"25","recordCount":40808,"records":[{"id":70033579,"text":"70033579 - 2007 - Dynamics of newly established elk populations","interactions":[],"lastModifiedDate":"2018-01-05T10:49:35","indexId":"70033579","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":"Dynamics of newly established elk populations","docAbstract":"The dynamics of newly established elk (Cervus elaphus) populations can provide insights about maximum sustainable rates of reproduction, survival, and increase. However, data used to estimate rates of increase typically have been limited to counts and rarely have included complementary estimates of vital rates. Complexities of population dynamics cannot be understood without considering population processes as well as population states. We estimated pregnancy rates, survival rates, age ratios, and sex ratios for reintroduced elk at Theodore Roosevelt National Park, North Dakota, USA; combined vital rates in a population projection model; and compared model projections with observed elk numbers and population ratios. Pregnancy rates in January (early in the second trimester of pregnancy) averaged 54.1% (SE = 5.4%) for subadults and 91.0% (SE = 1.7%) for adults, and 91.6% of pregnancies resulted in recruitment at 8 months. Annual survival rates of adult females averaged 0.96 (95% CI = 0.94-0.98) with hunting included and 0.99 (95% CI = 0.97-0.99) with hunting excluded from calculations. Our fitted model explained 99.8% of past variation in population estimates and represents a useful new tool for short-term management planning. Although we found no evidence of temporal variation in vital rates, variation in population composition caused substantial variation in projected rates of increase (??=1.20-1.36). Restoring documented hunter harvests and removals of elk by the National Park Service led to a potential rate of ?? = 1.26. Greater rates of increase substantiated elsewhere were within the expected range of chance variation, given our model and estimates of vital rates. Rates of increase realized by small elk populations are too variable to support inferences about habitat quality or density dependence.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2006-247","issn":"00225","usgsCitation":"Sargeant, G., and Oehler, M., 2007, Dynamics of newly established elk populations: Journal of Wildlife Management, v. 71, no. 4, p. 1141-1148, https://doi.org/10.2193/2006-247.","productDescription":"8 p.","startPage":"1141","endPage":"1148","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":242089,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214366,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2006-247"}],"volume":"71","issue":"4","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"505a0435e4b0c8380cd50858","contributors":{"authors":[{"text":"Sargeant, G.A.","contributorId":51681,"corporation":false,"usgs":true,"family":"Sargeant","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":441517,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Oehler, M.W. Sr.","contributorId":105545,"corporation":false,"usgs":true,"family":"Oehler","given":"M.W.","suffix":"Sr.","email":"","affiliations":[],"preferred":false,"id":441518,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031576,"text":"70031576 - 2007 - Survival and breeding advantages of larger Black Brant (<i>Branta bernicla nigricans</i>) goslings: Within- and among-cohort variation","interactions":[],"lastModifiedDate":"2017-05-08T13:01:11","indexId":"70031576","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3544,"text":"The Auk","onlineIssn":"1938-4254","printIssn":"0004-8038","active":true,"publicationSubtype":{"id":10}},"title":"Survival and breeding advantages of larger Black Brant (<i>Branta bernicla nigricans</i>) goslings: Within- and among-cohort variation","docAbstract":"<p><span>We examined the relationship between mass late in the first summer and survival and return to the natal breeding colony for 12 cohorts (1986-1997) of female Black Brant (</span><i>Branta bernicla nigricans</i><span>). We used Cormack-Jolly-Seber methods and the program MARK to analyze capture-recapture data. Models included two kinds of residuals from regressions of mass on days after peak of hatch when goslings were measured; one based on the entire sample (12 cohorts) and the other based only on individuals in the same cohort. Some models contained date of peak of hatch (a group covariate related to lateness of nesting in that year) and mean cohort residual mass. Finally, models allowed survival to vary among cohorts. The best model of encounter probability included an effect of residual mass on encounter probability and allowed encounter probability to vary among age classes and across years. All competitive models contained an effect of one of the estimates of residual mass; relatively larger goslings survived their first year at higher rates. Goslings in cohorts from later years in the analysis tended to have lower first-year survival, after controlling for residual mass, which reflected the generally smaller mean masses for these cohorts but was potentially also a result of population-density effects additional to those on growth. Variation among cohorts in mean mass accounted for 56% of variation among cohorts in first-year survival. Encounter probabilities, which were correlated with breeding probability, increased with relative mass, which suggests that larger goslings not only survived at higher rates but also bred at higher rates. Although our findings support the well-established linkage between gosling mass and fitness, they suggest that additional environmental factors also influence first-year survival.</span></p>","language":"English","publisher":"American Ornithological Society","doi":"10.1642/0004-8038(2007)124[1281:SABAOL]2.0.CO;2","issn":"00048038","usgsCitation":"Sedinger, J., and Chelgren, N., 2007, Survival and breeding advantages of larger Black Brant (<i>Branta bernicla nigricans</i>) goslings: Within- and among-cohort variation: The Auk, v. 124, no. 4, p. 1281-1293, https://doi.org/10.1642/0004-8038(2007)124[1281:SABAOL]2.0.CO;2.","productDescription":"13 p.","startPage":"1281","endPage":"1293","costCenters":[],"links":[{"id":492042,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1642/0004-8038(2007)124[1281:sabaol]2.0.co;2","text":"Publisher Index Page"},{"id":239766,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"124","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba2ace4b08c986b31f893","contributors":{"authors":[{"text":"Sedinger, J.S.","contributorId":75471,"corporation":false,"usgs":true,"family":"Sedinger","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":432193,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chelgren, N.D. 0000-0003-0944-9165","orcid":"https://orcid.org/0000-0003-0944-9165","contributorId":13387,"corporation":false,"usgs":true,"family":"Chelgren","given":"N.D.","affiliations":[],"preferred":false,"id":432192,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031842,"text":"70031842 - 2007 - Seasonal nutrient and plankton dynamics in a physical-biological model of Crater Lake","interactions":[],"lastModifiedDate":"2017-11-15T10:10:37","indexId":"70031842","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Seasonal nutrient and plankton dynamics in a physical-biological model of Crater Lake","docAbstract":"A coupled 1D physical-biological model of Crater Lake is presented. The model simulates the seasonal evolution of two functional phytoplankton groups, total chlorophyll, and zooplankton in good quantitative agreement with observations from a 10-year monitoring study. During the stratified period in summer and early fall the model displays a marked vertical structure: the phytoplankton biomass of the functional group 1, which represents diatoms and dinoflagellates, has its highest concentration in the upper 40 m; the phytoplankton biomass of group 2, which represents chlorophyta, chrysophyta, cryptomonads and cyanobacteria, has its highest concentrations between 50 and 80 m, and phytoplankton chlorophyll has its maximum at 120 m depth. A similar vertical structure is a reoccurring feature in the available data. In the model the key process allowing a vertical separation between biomass and chlorophyll is photoacclimation. Vertical light attenuation (i.e., water clarity) and the physiological ability of phytoplankton to increase their cellular chlorophyll-to-biomass ratio are ultimately determining the location of the chlorophyll maximum. The location of the particle maxima on the other hand is determined by the balance between growth and losses and occurs where growth and losses equal. The vertical particle flux simulated by our model agrees well with flux measurements from a sediment trap. This motivated us to revisit a previously published study by Dymond et al. (1996). Dymond et al. used a box model to estimate the vertical particle flux and found a discrepancy by a factor 2.5-10 between their model-derived flux and measured fluxes from a sediment trap. Their box model neglected the exchange flux of dissolved and suspended organic matter, which, as our model and available data suggests is significant for the vertical exchange of nitrogen. Adjustment of Dymond et al.'s assumptions to account for dissolved and suspended nitrogen yields a flux estimate that is consistent with sediment trap measurements and our model. ?? 2007 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-006-2615-5","issn":"00188158","usgsCitation":"Fennel, K., Collier, R., Larson, G., Crawford, G., and Boss, E., 2007, Seasonal nutrient and plankton dynamics in a physical-biological model of Crater Lake: Hydrobiologia, v. 574, no. 1, p. 265-280, https://doi.org/10.1007/s10750-006-2615-5.","startPage":"265","endPage":"280","numberOfPages":"16","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":242381,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214639,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-2615-5"}],"volume":"574","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b88c7e4b08c986b316b79","contributors":{"authors":[{"text":"Fennel, K.","contributorId":89361,"corporation":false,"usgs":true,"family":"Fennel","given":"K.","affiliations":[],"preferred":false,"id":433384,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Collier, R.","contributorId":36370,"corporation":false,"usgs":true,"family":"Collier","given":"R.","email":"","affiliations":[],"preferred":false,"id":433381,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Larson, G.","contributorId":41585,"corporation":false,"usgs":true,"family":"Larson","given":"G.","email":"","affiliations":[],"preferred":false,"id":433382,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Crawford, G.","contributorId":97624,"corporation":false,"usgs":true,"family":"Crawford","given":"G.","email":"","affiliations":[],"preferred":false,"id":433385,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Boss, E.","contributorId":59544,"corporation":false,"usgs":true,"family":"Boss","given":"E.","email":"","affiliations":[],"preferred":false,"id":433383,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70029794,"text":"70029794 - 2007 - Ecological gradients within a Pennsylvanian mire forest","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029794","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Ecological gradients within a Pennsylvanian mire forest","docAbstract":"Pennsylvanian coals represent remains of the earliest peat-forming rain forests, but there is no current consensus on forest ecology. Localized studies of fossil forests suggest intermixture of taxa (heterogeneity), while, in contrast, coal ball and palynological analyses imply the existence of pronounced ecological gradients. Here, we report the discovery of a spectacular fossil forest preserved over ???1000 ha on top of the Pennsylvanian (Desmoinesian) Herrin (No. 6) Coal of Illinois, United States. The forest was abruptly drowned when fault movement dropped a segment of coastal mire below sea level. In the largest study of its kind to date, forest composition is statistically analyzed within a well-constrained paleogeographic context. Findings resolve apparent conflicts in models of Pennsylvanian mire ecology by confirming the existence of forest heterogeneity at the local scale, while additionally demonstrating the emergence of ecological gradients at landscape scale. ?? 2007 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/G23472A.1","issn":"00917613","usgsCitation":"DiMichele, W.A., Falcon-Lang, H.J., Nelson, W., Elrick, S., and Ames, P., 2007, Ecological gradients within a Pennsylvanian mire forest: Geology, v. 35, no. 5, p. 415-418, https://doi.org/10.1130/G23472A.1.","startPage":"415","endPage":"418","numberOfPages":"4","costCenters":[],"links":[{"id":212652,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/G23472A.1"},{"id":240172,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"35","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0553e4b0c8380cd50d61","contributors":{"authors":[{"text":"DiMichele, William A.","contributorId":97631,"corporation":false,"usgs":true,"family":"DiMichele","given":"William","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":424368,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Falcon-Lang, H. J.","contributorId":41220,"corporation":false,"usgs":true,"family":"Falcon-Lang","given":"H.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":424367,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nelson, W.J.","contributorId":17762,"corporation":false,"usgs":true,"family":"Nelson","given":"W.J.","email":"","affiliations":[],"preferred":false,"id":424365,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Elrick, S.D.","contributorId":38364,"corporation":false,"usgs":true,"family":"Elrick","given":"S.D.","email":"","affiliations":[],"preferred":false,"id":424366,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ames, P.R.","contributorId":9823,"corporation":false,"usgs":true,"family":"Ames","given":"P.R.","email":"","affiliations":[],"preferred":false,"id":424364,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031585,"text":"70031585 - 2007 - Smallmouth bass and largemouth bass predation on juvenile Chinook salmon and other salmonids in the Lake Washington basin","interactions":[],"lastModifiedDate":"2012-03-12T17:21:10","indexId":"70031585","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2886,"text":"North American Journal of Fisheries Management","active":true,"publicationSubtype":{"id":10}},"title":"Smallmouth bass and largemouth bass predation on juvenile Chinook salmon and other salmonids in the Lake Washington basin","docAbstract":"We assessed the impact of predation by smallmouth bass Micropterus dolomieu and largemouth bass M. salmoides on juveniles of federally listed Chinook salmon Oncorhynchus tshawytscha and other anadromous salmonid populations in the Lake Washington system. Bass were collected with boat electrofishing equipment in the south end of Lake Washington (February-June) and the Lake Washington Ship Canal (LWSC; April-July), a narrow waterway that smolts must migrate through to reach the marine environment. Genetic analysis was used to identify ingested salmonids to obtain a more precise species-specific consumption estimate. Overall, we examined the stomachs of 783 smallmouth bass and 310 largemouth bass greater than 100 mm fork length (FL). Rates of predation on salmonids in the south end of Lake Washington were generally low for both black bass species. In the LWSC, juvenile salmonids made up a substantial part of bass diets; consumption of salmonids was lower for largemouth bass than for smallmouth bass. Smallmouth bass predation on juvenile salmonids was greatest in June, when salmonids made up approximately 50% of their diet. In the LWSC, overall black bass consumption of salmonids was approximately 36,000 (bioenergetics model) to 46,000 (meal turnover consumption model) juveniles, of which about one-third was juvenile Chinook salmon, one-third was coho salmon O. kisutch, and one-third was sockeye salmon O. nerka. We estimated that about 2,460,000 juvenile Chinook salmon (hatchery and wild sources combined) were produced in the Lake Washington basin in 1999; thus, the mortality estimates in the LWSC range from 0.5% (bioenergetics) to 0.6% (meal turnover). Black bass prey mostly on subyearlings of each salmonid species. The vulnerability of subyearlings to predation can be attributed to their relatively small size; their tendency to migrate when water temperatures exceed 15??C, coinciding with greater black bass activity; and their use of nearshore areas, where overlap with black bass is greatest. We conclude that under current conditions, predation by smallmouth bass and largemouth bass has a minor impact on Chinook salmon and other salmonid populations in the Lake Washington system. ?? Copyright by the American Fisheries Society 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"North American Journal of Fisheries Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/M05-221.1","issn":"02755947","usgsCitation":"Tabor, R., Footen, B., Fresh, K., Celedonia, M., Mejia, F., Low, D., and Park, L., 2007, Smallmouth bass and largemouth bass predation on juvenile Chinook salmon and other salmonids in the Lake Washington basin: North American Journal of Fisheries Management, v. 27, no. 4, p. 1174-1188, https://doi.org/10.1577/M05-221.1.","startPage":"1174","endPage":"1188","numberOfPages":"15","costCenters":[],"links":[{"id":239934,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212445,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/M05-221.1"}],"volume":"27","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-11-01","publicationStatus":"PW","scienceBaseUri":"505b91a2e4b08c986b3199ec","contributors":{"authors":[{"text":"Tabor, R.A.","contributorId":17044,"corporation":false,"usgs":true,"family":"Tabor","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":432221,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Footen, B.A.","contributorId":8676,"corporation":false,"usgs":true,"family":"Footen","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":432219,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fresh, K.L.","contributorId":105916,"corporation":false,"usgs":true,"family":"Fresh","given":"K.L.","affiliations":[],"preferred":false,"id":432225,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Celedonia, M.T.","contributorId":10619,"corporation":false,"usgs":true,"family":"Celedonia","given":"M.T.","email":"","affiliations":[],"preferred":false,"id":432220,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mejia, F.","contributorId":73011,"corporation":false,"usgs":true,"family":"Mejia","given":"F.","email":"","affiliations":[],"preferred":false,"id":432224,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Low, D.L.","contributorId":20976,"corporation":false,"usgs":true,"family":"Low","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":432222,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Park, L.","contributorId":36269,"corporation":false,"usgs":true,"family":"Park","given":"L.","email":"","affiliations":[],"preferred":false,"id":432223,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70031839,"text":"70031839 - 2007 - Remote camera-trap methods and analyses reveal impacts of rangeland management on Namibian carnivore communities","interactions":[],"lastModifiedDate":"2012-03-12T17:21:53","indexId":"70031839","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2968,"text":"Oryx","active":true,"publicationSubtype":{"id":10}},"title":"Remote camera-trap methods and analyses reveal impacts of rangeland management on Namibian carnivore communities","docAbstract":"Assessing the abundance and distribution of mammalian carnivores is vital for understanding their ecology and providing for their long-term conservation. Because of the difficulty of trapping and handling carnivores many studies have relied on abundance indices that may not accurately reflect real abundance and distribution patterns. We developed statistical analyses that detect spatial correlation in visitation data from combined scent station and camera-trap surveys, and we illustrate how to use such data to make inferences about changes in carnivore assemblages. As a case study we compared the carnivore communities of adjacent communal and freehold rangelands in central Namibia. We used an index of overdispersion to test for repeat visits to individual camera-trap scent stations and a bootstrap simulation to test for correlations in visits to camera neighbourhoods. After distilling our presence-absence data to the most defensible spatial scale, we assessed overall carnivore visitation using logistic regression. Our analyses confirmed the expected pattern of a depauparate fauna on the communal rangelands compared to the freehold rangelands. Additionally, the species that were not detected on communal sites were the larger-bodied carnivores. By modelling these rare visits as a Poisson process we illustrate a method of inferring whether or not such patterns are because of local extinction of species or are simply a result of low sample effort. Our Namibian case study indicates that these field methods and analyses can detect meaningful differences in the carnivore communities brought about by anthropogenic influences. ?? 2007 FFI.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Oryx","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1017/S0030605306001414","issn":"00306053","usgsCitation":"Kauffman, M.J., Sanjayan, M., Lowenstein, J., Nelson, A., Jeo, R., and Crooks, K., 2007, Remote camera-trap methods and analyses reveal impacts of rangeland management on Namibian carnivore communities: Oryx, v. 41, no. 1, p. 70-78, https://doi.org/10.1017/S0030605306001414.","startPage":"70","endPage":"78","numberOfPages":"9","costCenters":[],"links":[{"id":477176,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1017/s0030605306001414","text":"Publisher Index Page"},{"id":215078,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1017/S0030605306001414"},{"id":242850,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-03-05","publicationStatus":"PW","scienceBaseUri":"505aa6dae4b0c8380cd850b4","contributors":{"authors":[{"text":"Kauffman, M. J.","contributorId":44262,"corporation":false,"usgs":true,"family":"Kauffman","given":"M.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":433364,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sanjayan, M.","contributorId":71407,"corporation":false,"usgs":true,"family":"Sanjayan","given":"M.","email":"","affiliations":[],"preferred":false,"id":433367,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lowenstein, J.","contributorId":101902,"corporation":false,"usgs":true,"family":"Lowenstein","given":"J.","email":"","affiliations":[],"preferred":false,"id":433369,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nelson, A.","contributorId":50343,"corporation":false,"usgs":true,"family":"Nelson","given":"A.","affiliations":[],"preferred":false,"id":433365,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Jeo, R.M.","contributorId":58485,"corporation":false,"usgs":true,"family":"Jeo","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":433366,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Crooks, K.R.","contributorId":81679,"corporation":false,"usgs":true,"family":"Crooks","given":"K.R.","email":"","affiliations":[],"preferred":false,"id":433368,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031588,"text":"70031588 - 2007 - Downhole receiver function: A case study","interactions":[],"lastModifiedDate":"2012-03-12T17:21:10","indexId":"70031588","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":"Downhole receiver function: A case study","docAbstract":"Receiver function is defined as the spectral ratio of the radial component and the vertical component of the ground motion. It is used to characterize converted waves. We extend the use of the receiver function to downhole data using waves recorded in a borehole, excited by an earthquake of magnitude 4.0 near San Francisco, California, on 26 June 1994. The focal depth of the event was 6.6 km and the epicenter was located at a distance of 12.6 km from the borehole array. Six three-component sensors were located at different depths in a borehole. To extract a coherent response of the near-surface from the incoherent earthquake waves, we deconvolve the waves recorded by the sensors at different depths with the waves recorded by the sensor on the surface. Deconvolution applied to the waves in the S-time window recorded by the radial component result in an upgoing and a downgoing wave propagating with S-wave velocity. For the waves in the P-time window recorded by the radial component, deconvolution also gives an upgoing and a down-going wave propagating with S-wave velocity. This interesting result suggests a P-to-S conversion at a depth below the deepest sensor. To diagnose this we compute the receiver function for the borehole recording of the earthquake waves. The receiver function shows an upgoing wave with an arrival close to time t = 0 for the deepest sensor. The agreement of the upgoing wave in the receiver function with the travel-time curve for the P-to-S converted wave, calculated using the P- and the S-wave velocity profile, supports the hypothesis of a pronounced P-to-S conversion. We present a synthetic example to illustrate that the first arrival of the receiver function applied to borehole data gives the upward-propagating P-to-S converted wave. To corroborate the observation of the mode conversion, we apply receiver function to a different earthquake data recorded by the same borehole array in 1998. The focal depth of the event was 6.9 km and the epicenter was located at a distance of 13 km from the borehole array. The receiver function for these data also show an upgoing wave with a pulse close to time t = 0 at the deepest sensor. The moveout of the upgoing wave agrees with the travel-time curve for the P-to-S converted wave, hence supporting our observation of the mode conversion.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the Seismological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1785/0120060256","issn":"00371106","usgsCitation":"Mehta, K., Snieder, R., and Graizer, V., 2007, Downhole receiver function: A case study: Bulletin of the Seismological Society of America, v. 97, no. 5, p. 1396-1403, https://doi.org/10.1785/0120060256.","startPage":"1396","endPage":"1403","numberOfPages":"8","costCenters":[],"links":[{"id":212480,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120060256"},{"id":239970,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"97","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a03b2e4b0c8380cd505fa","contributors":{"authors":[{"text":"Mehta, K.","contributorId":60440,"corporation":false,"usgs":true,"family":"Mehta","given":"K.","email":"","affiliations":[],"preferred":false,"id":432233,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Snieder, R.","contributorId":63924,"corporation":false,"usgs":true,"family":"Snieder","given":"R.","email":"","affiliations":[],"preferred":false,"id":432234,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Graizer, V.","contributorId":88930,"corporation":false,"usgs":true,"family":"Graizer","given":"V.","email":"","affiliations":[],"preferred":false,"id":432235,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031836,"text":"70031836 - 2007 - Pumping-induced drawdown and stream depletion in a leaky aquifer system","interactions":[],"lastModifiedDate":"2012-03-12T17:21:25","indexId":"70031836","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Pumping-induced drawdown and stream depletion in a leaky aquifer system","docAbstract":"The impact of ground water pumping on nearby streams is often estimated using analytic models of the interconnected stream-aquifer system. A common assumption of these models is that the pumped aquifer is underlain by an impermeable formation. A new semianalytic solution for drawdown and stream depletion has been developed that does not require this assumption. This solution shows that pumping-induced flow (leakage) through an underlying aquitard can be an important recharge mechanism in many stream-aquifer systems. The relative importance of this source of recharge increases with the distance between the pumping well and the stream. The distance at which leakage becomes the primary component of the pumping-induced recharge depends on the specific properties of the aquifer, aquitard, and streambed. Even when the aquitard is orders of magnitude less transmissive than the aquifer, leakage can be an important recharge mechanism because of the large surface area over which it occurs. Failure to consider aquitard leakage can lead to large overestimations of both the drawdown produced by pumping and the contribution of stream depletion to the pumping-induced recharge. The ramifications for water resources management and water rights adjudication can be significant. A hypothetical example helps illustrate these points and demonstrates that more attention should be given to estimating the properties of aquitards underlying stream-aquifer systems. The solution presented here should serve as a relatively simple but versatile tool for practical assessments of pumping-induced stream-aquifer interactions. However, this solution should not be used for such assessments without site-specific data that indicate pumping has induced leakage through the aquitard. ?? 2006 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2006.00272.x","issn":"0017467X","usgsCitation":"Butler, J., Zhan, X., and Zlotnik, V., 2007, Pumping-induced drawdown and stream depletion in a leaky aquifer system: Ground Water, v. 45, no. 2, p. 178-186, https://doi.org/10.1111/j.1745-6584.2006.00272.x.","startPage":"178","endPage":"186","numberOfPages":"9","costCenters":[],"links":[{"id":487033,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://digitalcommons.unl.edu/geosciencefacpub/275","text":"External Repository"},{"id":215044,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2006.00272.x"},{"id":242813,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"2","noUsgsAuthors":false,"publicationDate":"2006-11-30","publicationStatus":"PW","scienceBaseUri":"505a9038e4b0c8380cd7fbe1","contributors":{"authors":[{"text":"Butler, J.J. Jr.","contributorId":12194,"corporation":false,"usgs":true,"family":"Butler","given":"J.J.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":433357,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Zhan, X.","contributorId":26477,"corporation":false,"usgs":true,"family":"Zhan","given":"X.","email":"","affiliations":[],"preferred":false,"id":433358,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zlotnik, V.A.","contributorId":102660,"corporation":false,"usgs":true,"family":"Zlotnik","given":"V.A.","email":"","affiliations":[],"preferred":false,"id":433359,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031589,"text":"70031589 - 2007 - The response of spit shapes to wave-angle climates","interactions":[],"lastModifiedDate":"2012-03-12T17:21:14","indexId":"70031589","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"The response of spit shapes to wave-angle climates","docAbstract":"We investigate spit formation and evolution in light of the high-wave-angle instability in shoreline shape arising from a maximizing angle for wave-driven alongshore sediment transport. Single spits emerge in a simple one-contour line numerical model that evolves the coast using morphodynamic feedbacks and a 'climate' of waves approaching the shore from variable directions. Analysis of sediment transport and shoreline stability metrics illustrate how spits can be generated, demonstrating how waves from all angles can play a role in spit formation and evolution. Simulations suggest that regardless of whether high- or low-angle waves dominate relative to the general shoreline trend, as spits extend offshore, they tend to orient themselves such that most of their coast barely experiences low-angle waves and alongshore sediment transport to the spit end is maximized. This 'graded' spit shape minimizes gradients in sediment flux, while the recurve at the spit end experiences larger gradients and a region of high-angle instability. Examining hindcast wave data, similar trends are seen along the natural example of Long Point, Lake Erie, Canada. ?? 2007 ASCE.","largerWorkTitle":"Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes","conferenceTitle":"6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes","conferenceDate":"13 May 2007 through 17 May 2007","conferenceLocation":"New Orleans, LA","language":"English","doi":"10.1061/40926(239)27","isbn":"0784409269; 9780784409268","usgsCitation":"Ashton, A., Murray, A., and Littlewood, R., 2007, The response of spit shapes to wave-angle climates, <i>in</i> Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes, New Orleans, LA, 13 May 2007 through 17 May 2007, https://doi.org/10.1061/40926(239)27.","costCenters":[],"links":[{"id":212507,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/40926(239)27"},{"id":240000,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationDate":"2012-04-26","publicationStatus":"PW","scienceBaseUri":"505baf39e4b08c986b324643","contributors":{"authors":[{"text":"Ashton, A.D.","contributorId":73431,"corporation":false,"usgs":true,"family":"Ashton","given":"A.D.","email":"","affiliations":[],"preferred":false,"id":432238,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Murray, A.B.","contributorId":12598,"corporation":false,"usgs":true,"family":"Murray","given":"A.B.","email":"","affiliations":[],"preferred":false,"id":432236,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Littlewood, R.","contributorId":26587,"corporation":false,"usgs":true,"family":"Littlewood","given":"R.","email":"","affiliations":[],"preferred":false,"id":432237,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031595,"text":"70031595 - 2007 - Coupled changes in sand grain size and sand transport driven by changes in the upstream supply of sand in the Colorado River: relative importance of changes in bed-sand grain size and bed-sand area","interactions":[],"lastModifiedDate":"2014-10-07T14:04:52","indexId":"70031595","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3368,"text":"Sedimentary Geology","active":true,"publicationSubtype":{"id":10}},"title":"Coupled changes in sand grain size and sand transport driven by changes in the upstream supply of sand in the Colorado River: relative importance of changes in bed-sand grain size and bed-sand area","docAbstract":"Sand transport in the Colorado River in Marble and Grand canyons was naturally limited by the upstream supply of sand. Prior to the 1963 closure of Glen Canyon Dam, the river exhibited the following four effects of sand supply limitation: (1) hysteresis in sediment concentration, (2) hysteresis in sediment grain size coupled to the hysteresis in sediment concentration, (3) production of inversely graded flood deposits, and (4) development or modification of a lag between the time of a flood peak and the time of either maximum or minimum (depending on reach geometry) bed elevation. Construction and operation of the dam has enhanced the degree to which the first two of these four effects are evident, and has not affected the degree to which the last two effects of sand supply limitation are evident in the Colorado River in Marble and Grand canyons. The first three of the effects involve coupled changes in suspended-sand concentration and grain size that are controlled by changes in the upstream supply of sand. During tributary floods, sand on the bed of the Colorado River fines; this causes the suspended sand to fine and the suspended-sand concentration to increase, even when the discharge of water remains constant. Subsequently, the bed is winnowed of finer sand, the suspended sand coarsens, and the suspended-sand concentration decreases independently of discharge. Also associated with these changes in sand supply are changes in the fraction of the bed that is covered by sand. Thus, suspended-sand concentration in the Colorado River is likely regulated by both changes in the bed-sand grain size and changes in the bed-sand area. A physically based flow and suspended-sediment transport model is developed, tested, and applied to data from the Colorado River to evaluate the relative importance of changes in the bed-sand grain size and changes in the bed-sand area in regulating suspended-sand concentration. Although the model was developed using approximations for steady, uniform flow, and other simplifications that are not met in the Colorado River, the results nevertheless support the idea that changes in bed-sand grain size are much more important than changes in bed-sand area in regulating the concentration of suspended sand.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Sedimentary Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.sedgeo.2007.03.016","issn":"00370738","usgsCitation":"Topping, D., Rubin, D.M., and Melis, T., 2007, Coupled changes in sand grain size and sand transport driven by changes in the upstream supply of sand in the Colorado River: relative importance of changes in bed-sand grain size and bed-sand area: Sedimentary Geology, v. 202, no. 3, p. 538-561, https://doi.org/10.1016/j.sedgeo.2007.03.016.","productDescription":"24 p.","startPage":"538","endPage":"561","numberOfPages":"24","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":212572,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.sedgeo.2007.03.016"},{"id":240075,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Arizona","otherGeospatial":"Colorado River","volume":"202","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fc88e4b0c8380cd4e2d0","contributors":{"authors":[{"text":"Topping, D.J. 0000-0002-2104-4577","orcid":"https://orcid.org/0000-0002-2104-4577","contributorId":53927,"corporation":false,"usgs":true,"family":"Topping","given":"D.J.","affiliations":[],"preferred":false,"id":432256,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rubin, D. M.","contributorId":103689,"corporation":false,"usgs":true,"family":"Rubin","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":432258,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Melis, T.S.","contributorId":85621,"corporation":false,"usgs":true,"family":"Melis","given":"T.S.","email":"","affiliations":[],"preferred":false,"id":432257,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033162,"text":"70033162 - 2007 - Predicting Secchi disk depth from average beam attenuation in a deep, ultra-clear lake","interactions":[],"lastModifiedDate":"2017-11-22T18:06:00","indexId":"70033162","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Predicting Secchi disk depth from average beam attenuation in a deep, ultra-clear lake","docAbstract":"We addressed potential sources of error in estimating the water clarity of mountain lakes by investigating the use of beam transmissometer measurements to estimate Secchi disk depth. The optical properties Secchi disk depth (SD) and beam transmissometer attenuation (BA) were measured in Crater Lake (Crater Lake National Park, Oregon, USA) at a designated sampling station near the maximum depth of the lake. A standard 20 cm black and white disk was used to measure SD. The transmissometer light source had a nearly monochromatic wavelength of 660 nm and a path length of 25 cm. We created a SD prediction model by regression of the inverse SD of 13 measurements recorded on days when environmental conditions were acceptable for disk deployment with BA averaged over the same depth range as the measured SD. The relationship between inverse SD and averaged BA was significant and the average 95% confidence interval for predicted SD relative to the measured SD was ??1.6 m (range = -4.6 to 5.5 m) or ??5.0%. Eleven additional sample dates tested the accuracy of the predictive model. The average 95% confidence interval for these sample dates was ??0.7 m (range = -3.5 to 3.8 m) or ??2.2%. The 1996-2000 time-series means for measured and predicted SD varied by 0.1 m, and the medians varied by 0.5 m. The time-series mean annual measured and predicted SD's also varied little, with intra-annual differences between measured and predicted mean annual SD ranging from -2.1 to 0.1 m. The results demonstrated that this prediction model reliably estimated Secchi disk depths and can be used to significantly expand optical observations in an environment where the conditions for standardized SD deployments are limited. ?? 2007 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-006-0349-z","issn":"00188158","usgsCitation":"Larson, G., Hoffman, R., Hargreaves, B., and Collier, R., 2007, Predicting Secchi disk depth from average beam attenuation in a deep, ultra-clear lake: Hydrobiologia, v. 574, no. 1, p. 141-148, https://doi.org/10.1007/s10750-006-0349-z.","startPage":"141","endPage":"148","numberOfPages":"8","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":240854,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213248,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-0349-z"}],"volume":"574","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a81a2e4b0c8380cd7b63c","contributors":{"authors":[{"text":"Larson, G.L.","contributorId":103021,"corporation":false,"usgs":true,"family":"Larson","given":"G.L.","email":"","affiliations":[],"preferred":false,"id":439641,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hoffman, R.L.","contributorId":28778,"corporation":false,"usgs":true,"family":"Hoffman","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":439638,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hargreaves, B.R.","contributorId":71391,"corporation":false,"usgs":true,"family":"Hargreaves","given":"B.R.","email":"","affiliations":[],"preferred":false,"id":439639,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Collier, R.W.","contributorId":98547,"corporation":false,"usgs":true,"family":"Collier","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":439640,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031596,"text":"70031596 - 2007 - Assessing the likely value of gravity and drawdown measurements to constrain estimates of hydraulic conductivity and specific yield during unconfined aquifer testing","interactions":[],"lastModifiedDate":"2018-04-03T17:22:22","indexId":"70031596","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Assessing the likely value of gravity and drawdown measurements to constrain estimates of hydraulic conductivity and specific yield during unconfined aquifer testing","docAbstract":"<p><span>Pumping of an unconfined aquifer can cause local desaturation detectable with high‐resolution gravimetry. A previous study showed that signal‐to‐noise ratios could be predicted for gravity measurements based on a hydrologic model. We show that although changes should be detectable with gravimeters, estimations of hydraulic conductivity and specific yield based on gravity data alone are likely to be unacceptably inaccurate and imprecise. In contrast, a transect of low‐quality drawdown data alone resulted in accurate estimates of hydraulic conductivity and inaccurate and imprecise estimates of specific yield. Combined use of drawdown and gravity data, or use of high‐quality drawdown data alone, resulted in unbiased and precise estimates of both parameters. This study is an example of the value of a staged assessment regarding the likely significance of a new measurement method or monitoring scenario before collecting field data.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006WR005678","usgsCitation":"Blainey, J.B., Ferré, T., and Cordova, J., 2007, Assessing the likely value of gravity and drawdown measurements to constrain estimates of hydraulic conductivity and specific yield during unconfined aquifer testing: Water Resources Research, v. 43, no. 12, Article W12408; 9 p., https://doi.org/10.1029/2006WR005678.","productDescription":"Article W12408; 9 p.","costCenters":[],"links":[{"id":240111,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"12","noUsgsAuthors":false,"publicationDate":"2007-12-20","publicationStatus":"PW","scienceBaseUri":"5059edece4b0c8380cd49aea","contributors":{"authors":[{"text":"Blainey, Joan B.","contributorId":54284,"corporation":false,"usgs":true,"family":"Blainey","given":"Joan","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":432261,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ferré, Ty P.A.","contributorId":35647,"corporation":false,"usgs":false,"family":"Ferré","given":"Ty P.A.","affiliations":[],"preferred":false,"id":432260,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cordova, Jeffrey T. jcordova@usgs.gov","contributorId":1845,"corporation":false,"usgs":true,"family":"Cordova","given":"Jeffrey T.","email":"jcordova@usgs.gov","affiliations":[{"id":472,"text":"New Mexico Water Science Center","active":true,"usgs":true}],"preferred":false,"id":432259,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031601,"text":"70031601 - 2007 - Warming may create substantial water supply shortages in the Colorado River basin","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031601","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Warming may create substantial water supply shortages in the Colorado River basin","docAbstract":"The high demand for water, the recent multiyear drought (1999-2007), and projections of global warming have raised questions about the long-term sustainability of water supply in the southwestern United States. In this study, the potential effects of specific levels of atmospheric warming on water-year streamflow in the Colorado River basin are evaluated using a water-balance model, and the results are analyzed within the context of a multi-century tree-ring reconstruction (1490-1998) of streamflow for the basin. The results indicate that if future warming occurs in the basin and is not accompanied by increased precipitation, then the basin is likely to experience periods of water supply shortages more severe than those inferred from the longterm historical tree-ring reconstruction. Furthermore, the modeling results suggest that future warming would increase the likelihood of failure to meet the water allocation requirements of the Colorado River Compact.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Research Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2007GL031764","issn":"00948276","usgsCitation":"McCabe, G., and Wolock, D., 2007, Warming may create substantial water supply shortages in the Colorado River basin: Geophysical Research Letters, v. 34, no. 22, https://doi.org/10.1029/2007GL031764.","costCenters":[],"links":[{"id":477230,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2007gl031764","text":"Publisher Index Page"},{"id":212183,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007GL031764"},{"id":239633,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"34","issue":"22","noUsgsAuthors":false,"publicationDate":"2007-11-27","publicationStatus":"PW","scienceBaseUri":"505bc3c9e4b08c986b32b3a4","contributors":{"authors":[{"text":"McCabe, G.J. 0000-0002-9258-2997","orcid":"https://orcid.org/0000-0002-9258-2997","contributorId":12961,"corporation":false,"usgs":true,"family":"McCabe","given":"G.J.","affiliations":[],"preferred":false,"id":432274,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wolock, D.M. 0000-0002-6209-938X","orcid":"https://orcid.org/0000-0002-6209-938X","contributorId":36601,"corporation":false,"usgs":true,"family":"Wolock","given":"D.M.","affiliations":[],"preferred":false,"id":432275,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031808,"text":"70031808 - 2007 - Why the sacramento delta area differs from other parts of the great valley: numerical modeling of thermal structure and thermal subsidence of forearc basins","interactions":[],"lastModifiedDate":"2014-09-09T10:49:37","indexId":"70031808","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2125,"text":"Izvestiya, Physics of the Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Why the sacramento delta area differs from other parts of the great valley: numerical modeling of thermal structure and thermal subsidence of forearc basins","docAbstract":"<p>Data on present-day heat flow, subsidence history, and paleotemperature for the Sacramento Delta region, California, have been employed to constrain a numerical model of tectonic subsidence and thermal evolution of forearc basins. The model assumes an oceanic basement with an initial thermal profile dependent on its age subjected to refrigeration caused by a subducting slab. Subsidence in the Sacramento Delta region appears to be close to that expected for a forearc basin underlain by normal oceanic lithosphere of age 150 Ma, demonstrating that effects from both the initial thermal profile and the subduction process are necessary and sufficient. Subsidence at the eastern and northern borders of the Sacramento Valley is considerably less, approximating subsidence expected from the dynamics of the subduction zone alone. These results, together with other geophysical data, show that Sacramento Delta lithosphere, being thinner and having undergone deeper subsidence, must differ from lithosphere of the transitional type under other parts of the Sacramento Valley. Thermal modeling allows evaluation of the rheological properties of the lithosphere. Strength diagrams based on our thermal model show that, even under relatively slow deformation (10<sup>−17</sup> s<sup>−1</sup>), the upper part of the delta crystalline crust (down to 20–22 km) can fail in brittle fashion, which is in agreement with deeper earthquake occurrence. Hypocentral depths of earthquakes under the Sacramento Delta region extend to nearly 20 km, whereas, in the Coast Ranges to the west, depths are typically less than 12–15 km. The greater width of the seismogenic zone in this area raises the possibility that, for fault segments of comparable length, earthquakes of somewhat greater magnitude might occur than in the Coast Ranges to the west.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Izvestiya, Physics of the Solid Earth","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Springer","doi":"10.1134/S1069351307010089","issn":"10693513","usgsCitation":"Mikhailov, V., Parsons, T., Simpson, R., Timoshkina, E., and Williams, C., 2007, Why the sacramento delta area differs from other parts of the great valley: numerical modeling of thermal structure and thermal subsidence of forearc basins: Izvestiya, Physics of the Solid Earth, v. 43, no. 1, p. 75-90, https://doi.org/10.1134/S1069351307010089.","productDescription":"16 p.","startPage":"75","endPage":"90","numberOfPages":"16","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":212254,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1134/S1069351307010089"},{"id":239714,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Great Valley","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -122.0,36.0 ], [ -122.0,40.0 ], [ -120.0,40.0 ], [ -120.0,36.0 ], [ -122.0,36.0 ] ] ] } } ] }","volume":"43","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bd0a6e4b08c986b32efa7","contributors":{"authors":[{"text":"Mikhailov, V.O.","contributorId":101455,"corporation":false,"usgs":true,"family":"Mikhailov","given":"V.O.","email":"","affiliations":[],"preferred":false,"id":433216,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Parsons, T.","contributorId":48288,"corporation":false,"usgs":true,"family":"Parsons","given":"T.","email":"","affiliations":[],"preferred":false,"id":433213,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Simpson, R.W.","contributorId":76738,"corporation":false,"usgs":true,"family":"Simpson","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":433214,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Timoshkina, E.P.","contributorId":79295,"corporation":false,"usgs":true,"family":"Timoshkina","given":"E.P.","email":"","affiliations":[],"preferred":false,"id":433215,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Williams, C.","contributorId":10514,"corporation":false,"usgs":true,"family":"Williams","given":"C.","affiliations":[],"preferred":false,"id":433212,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031803,"text":"70031803 - 2007 - Individual dietary specialization and dive behaviour in the California sea otter: Using archival time-depth data to detect alternative foraging strategies","interactions":[],"lastModifiedDate":"2012-03-12T17:21:06","indexId":"70031803","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1371,"text":"Deep-Sea Research Part II: Topical Studies in Oceanography","active":true,"publicationSubtype":{"id":10}},"title":"Individual dietary specialization and dive behaviour in the California sea otter: Using archival time-depth data to detect alternative foraging strategies","docAbstract":"The existence of individual prey specializations has been reported for an ever-growing number of taxa, and has important ramifications for our understanding of predator-prey dynamics. We use the California sea otter population as a case study to validate the use of archival time-depth data to detect and measure differences in foraging behaviour and diet. We collected observational foraging data from radio-tagged sea otters that had been equipped with Mk9 time depth recorders (TDRs, Wildlife Computers, Redmond, WA). After recapturing the study animals and retrieving the TDRs it was possible to compare the two data types, by matching individual dives from the TDR record with observational data and thus examining behavioural correlates of capture success and prey species. Individuals varied with respect to prey selection, aggregating into one of three distinct dietary specializations. A number of TDR-derived parameters, particularly dive depth and post-dive surface interval, differed predictably between specialist types. A combination of six dive parameters was particularly useful for discriminating between specialist types, and when incorporated into a multivariate cluster analysis, these six parameters resulted in classification of 13 adult female sea otters into three clusters that corresponded almost perfectly to the diet-based classification (1 out of 13 animals was misclassified). Thus based solely on quantifiable traits of time-depth data that have been collected over an appropriate period (in this case 1 year per animal), it was possible to assign female sea otters to diet type with >90% accuracy. TDR data can thus be used as a tool to measure the degree of individual specialization in sea otter populations, a conclusion that will likely apply to other diving marine vertebrates as well. Our ultimate goals must be both to understand the causes of individual specialization, and to incorporate such variation into models of population- and community-level food web dynamics. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Deep-Sea Research Part II: Topical Studies in Oceanography","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.dsr2.2006.11.012","issn":"09670645","usgsCitation":"Tinker, M.T., Costa, D., Estes, J.A., and Wieringa, N., 2007, Individual dietary specialization and dive behaviour in the California sea otter: Using archival time-depth data to detect alternative foraging strategies: Deep-Sea Research Part II: Topical Studies in Oceanography, v. 54, no. 3-4, p. 330-342, https://doi.org/10.1016/j.dsr2.2006.11.012.","startPage":"330","endPage":"342","numberOfPages":"13","costCenters":[],"links":[{"id":212642,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.dsr2.2006.11.012"},{"id":240158,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"54","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3a9ce4b0c8380cd61e05","contributors":{"authors":[{"text":"Tinker, M. T. 0000-0002-3314-839X","orcid":"https://orcid.org/0000-0002-3314-839X","contributorId":54152,"corporation":false,"usgs":false,"family":"Tinker","given":"M.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":433197,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Costa, D.P.","contributorId":29210,"corporation":false,"usgs":true,"family":"Costa","given":"D.P.","affiliations":[],"preferred":false,"id":433195,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Estes, J. A.","contributorId":53319,"corporation":false,"usgs":true,"family":"Estes","given":"J.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":433196,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wieringa, N.","contributorId":99372,"corporation":false,"usgs":true,"family":"Wieringa","given":"N.","email":"","affiliations":[],"preferred":false,"id":433198,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031605,"text":"70031605 - 2007 - Generation and propagation of nonlinear internal waves in Massachusetts Bay","interactions":[],"lastModifiedDate":"2017-08-31T10:55:54","indexId":"70031605","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2315,"text":"Journal of Geophysical Research C: Oceans","active":true,"publicationSubtype":{"id":10}},"title":"Generation and propagation of nonlinear internal waves in Massachusetts Bay","docAbstract":"During the summer, nonlinear internal waves (NLIWs) are commonly observed propagating in Massachusetts Bay. The topography of the area is unique in the sense that the generation area (over Stellwagen Bank) is only 25 km away from the shoaling area, and thus it represents an excellent natural laboratory to study the life cycle of NLIWs. To assist in the interpretation of the data collected during the 1998 Massachusetts Bay Internal Wave Experiment (MBIWE98), a fully nonlinear and nonhydrostatic model covering the generation/shoaling region was developed, to investigate the response of the system to the range of background and driving conditions observed. Simplified models were also used to elucidate the role of nonlinearity and dispersion in shaping the NLIW field. This paper concentrates on the generation process and the subsequent evolution in the basin. The model was found to reproduce well the range of propagation characteristics observed (arrival time, propagation speed, amplitude), and provided a coherent framework to interpret the observations. Comparison with a fully nonlinear hydrostatic model shows that during the generation and initial evolution of the waves as they move away from Stellwagen Bank, dispersive effects play a negligible role. Thus the problem can be well understood considering the geometry of the characteristics along which the Riemann invariants of the hydrostatic problem propagate. Dispersion plays a role only during the evolution of the undular bore in the middle of Stellwagen Basin. The consequences for modeling NLIWs within hydrostatic models are briefly discussed at the end.","language":"English","publisher":"Wiley","doi":"10.1029/2007JC004313","issn":"01480227","usgsCitation":"Scotti, A., Beardsley, R., and Butman, B., 2007, Generation and propagation of nonlinear internal waves in Massachusetts Bay: Journal of Geophysical Research C: Oceans, v. 112, no. C10, 19 p., https://doi.org/10.1029/2007JC004313.","productDescription":"19 p.","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":477231,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2007jc004313","text":"Publisher Index Page"},{"id":239668,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Massachusetts","otherGeospatial":"Massachusetts Bay","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -71.0,42.0 ], [ -71.0,42.75 ], [ -70.25,42.75 ], [ -70.25,42.0 ], [ -71.0,42.0 ] ] ] } } ] }","volume":"112","issue":"C10","noUsgsAuthors":false,"publicationDate":"2007-10-02","publicationStatus":"PW","scienceBaseUri":"505a154fe4b0c8380cd54d51","contributors":{"authors":[{"text":"Scotti, A.","contributorId":67270,"corporation":false,"usgs":true,"family":"Scotti","given":"A.","email":"","affiliations":[],"preferred":false,"id":432302,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Beardsley, R.C.","contributorId":106508,"corporation":false,"usgs":true,"family":"Beardsley","given":"R.C.","affiliations":[],"preferred":false,"id":432304,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Butman, B.","contributorId":85580,"corporation":false,"usgs":true,"family":"Butman","given":"B.","email":"","affiliations":[],"preferred":false,"id":432303,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031770,"text":"70031770 - 2007 - Two lithospheric profiles across southern California derived from gravity and seismic data","interactions":[],"lastModifiedDate":"2020-04-28T14:52:06.103758","indexId":"70031770","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2304,"text":"Journal of Geodynamics","active":true,"publicationSubtype":{"id":10}},"title":"Two lithospheric profiles across southern California derived from gravity and seismic data","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-serif\"><div id=\"aep-abstract-id27\" class=\"abstract author\"><div id=\"aep-abstract-sec-id28\"><p>We present two detailed 2-D density transects for the crust and uppermost mantle across southern California using a linear gravity inversion technique. This technique parameterizes the crust and upper mantle as a set of blocks that are based on published geologic and seismic models. Each block can have a range of densities that are constrained where possible by borehole measurements, seismic velocities, and petrologic data. To further constrain the models, it is assumed that the lithosphere is close to isostatic equilibrium at both ends of the profiles, in the deep ocean and east of the Mojave Desert. We calculate the lithostatic pressure variations field for the whole cross section to rule out the geophysically insignificant solutions. In the linear equation,<span>&nbsp;</span><i>ρ</i>&nbsp;=&nbsp;<i>a</i>&nbsp;+&nbsp;<i>bV</i><span>&nbsp;</span>(<i>V</i>, seismic P-wave velocity;<span>&nbsp;</span><i>ρ</i>, density), which approximates the mantle density–velocity (<i>ρ</i>–<i>V</i>) relationship, different coefficients for<span>&nbsp;</span><i>b</i><span>&nbsp;</span>were evaluated. Lower coefficients (<i>b</i>&nbsp;&lt;&nbsp;0.2) correspond to an almost purely thermally perturbed mantle, while higher coefficients (<i>b</i>&nbsp;&gt;&nbsp;0.3) imply that other effects, such as composition and/or metamorphic changes, play an important role in the mantle. Density models were constructed with the coefficient<span>&nbsp;</span><i>b</i><span>&nbsp;</span>ranging from 0 to 0.6. The results indicate that a high<span>&nbsp;</span><i>b</i><span>&nbsp;</span>value in the mantle<span>&nbsp;</span><i>ρ</i>–<i>V</i><span>&nbsp;</span>relationship is associated with less dense crust in the Mojave block and more dense crust in the Catalina schist block. In the less dense Mojave block, the average density of the whole crust is ∼2.75&nbsp;g/cm<sup>3</sup>, while that of the lower crust is ∼2.72&nbsp;g/cm<sup>3</sup>. These densities imply a high silica content in the crust, and a minor fraction of basic rock in the lower crust, or perhaps the absence of a basaltic layer altogether. By comparison, the average density of a typical continental stable platform is ∼2.85&nbsp;g/cm<sup>3</sup>. Models with higher<span>&nbsp;</span><i>b</i><span>&nbsp;</span>coefficients (0.5–0.6) are characterized by a large isostatic imbalance. On the other hand, lower<span>&nbsp;</span><i>b</i><span>&nbsp;</span>values (0–0.2) require a consolidated whole crust density in the Mojave Desert of ∼2.78&nbsp;g/cm<sup>3</sup>, and a lower crust density of ∼2.89&nbsp;g/cm<sup>3</sup><span>&nbsp;</span>with mostly basaltic composition. This contradicts the observed, lower<span>&nbsp;</span><i>V</i><sub>p</sub>/<i>V</i><sub>s</sub>-ratio in the Mojave Desert associated with mostly felsic and low-density crust. Models with lower<span>&nbsp;</span><i>b</i><span>&nbsp;</span>coefficients (0.1–0.2) are characterized by an absence of local Airy compensation beneath the San Gabriel Mountains at the LARSE-1 profile. These, and other non-gravity arguments, suggest optimal solutions to the mantle<span>&nbsp;</span><i>ρ</i>–<i>V</i><span>&nbsp;</span>relation of<span>&nbsp;</span><i>b</i>&nbsp;∼&nbsp;0.2–0.4. This, in turn, means that both thermal and petrological effects occur inside the downwelling of the uppermost mantle high velocity body located beneath the Transverse Ranges. During the development of this mantle downwelling, the basaltic layer of the Mojave block was likely eroded and pulled down into the high velocity body. Those basaltic fragments may have been transformed into eclogites, and this metamorphic change implies a higher<span>&nbsp;</span><i>b</i>-coefficient density–velocity relationship than would be expected for a purely thermal process.</p></div></div></div>","largerWorkTitle":"","language":"English","publisher":"Elsevier","doi":"10.1016/j.jog.2006.09.011","issn":"02643707","usgsCitation":"Romanyuk, T., Mooney, W.D., and Detweiler, S.T., 2007, Two lithospheric profiles across southern California derived from gravity and seismic data: Journal of Geodynamics, v. 43, no. 2, p. 274-307, https://doi.org/10.1016/j.jog.2006.09.011.","productDescription":"34 p.","startPage":"274","endPage":"307","numberOfPages":"34","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":239643,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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 \"}}]}","volume":"43","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb957e4b08c986b327bd3","contributors":{"authors":[{"text":"Romanyuk, T.","contributorId":107930,"corporation":false,"usgs":true,"family":"Romanyuk","given":"T.","affiliations":[],"preferred":false,"id":433044,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mooney, Walter D. 0000-0002-5310-3631 mooney@usgs.gov","orcid":"https://orcid.org/0000-0002-5310-3631","contributorId":3194,"corporation":false,"usgs":true,"family":"Mooney","given":"Walter","email":"mooney@usgs.gov","middleInitial":"D.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":433043,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Detweiler, Shane T. 0000-0001-5699-011X shane@usgs.gov","orcid":"https://orcid.org/0000-0001-5699-011X","contributorId":680,"corporation":false,"usgs":true,"family":"Detweiler","given":"Shane","email":"shane@usgs.gov","middleInitial":"T.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":433042,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031777,"text":"70031777 - 2007 - Evasion of added isotopic mercury from a northern temperate lake","interactions":[],"lastModifiedDate":"2018-10-16T11:11:46","indexId":"70031777","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Evasion of added isotopic mercury from a northern temperate lake","docAbstract":"<p>Isotopically enriched Hg (90% 202Hg) was added to a small lake in Ontario, Canada, at a rate equivalent to approximately threefold the annual direct atmospheric deposition rate that is typical of the northeastern United States. The Hg spike was thoroughly mixed into the epilimnion in nine separate events at two-week intervals throughout the summer growing season for three consecutive years. We measured concentrations of spike and ambient dissolved gaseous Hg (DGM) concentrations in surface water and the rate of volatilization of Hg from the lake on four separate, week-long sampling periods using floating dynamic flux chambers. The relationship between empirically measured rates of spike-Hg evasion were evaluated as functions of DGM concentration, wind velocity, and solar illumination. No individual environmental variable proved to be a strong predictor of the evasion flux. The DGM-normalized flux (expressed as the mass transfer coefficient, k) varied with wind velocity in a manner consistent with existing models of evasion of volatile solutes from natural waters but was higher than model estimates at low wind velocity. The empirical data were used to construct a description of evasion flux as a function of total dissolved Hg, wind, and solar illumination. That model was then applied to data for three summers for the experiment to generate estimates of Hg re-emission from the lake surface to the atmosphere. Based on ratios of spike Hg to ambient Hg in DGM and dissolved total Hg pools, ratios of DGM to total Hg in spike and ambient Hg pools, and flux estimates of spike and ambient Hg, we concluded that the added Hg spike was chemically indistinguishable from the ambient Hg in its behavior. Approximately 45% of Hg added to the lake over the summer was lost via volatilization.&nbsp;</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Toxicology and Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1897/06-148R.1","issn":"07307268","usgsCitation":"Southworth, G., Lindberg, S., Hintelmann, H., Amyot, M., Poulain, A., Bogle, M., Peterson, M., Rudd, J., Harris, R., Sandilands, K., Krabbenhoft, D., and Olsen, M.L., 2007, Evasion of added isotopic mercury from a northern temperate lake: Environmental Toxicology and Chemistry, v. 26, no. 1, p. 53-60, https://doi.org/10.1897/06-148R.1.","productDescription":"8 p.","startPage":"53","endPage":"60","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":212311,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/06-148R.1"},{"id":239777,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada","city":"Ontario","volume":"26","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-01","publicationStatus":"PW","scienceBaseUri":"505a0d21e4b0c8380cd52e25","contributors":{"authors":[{"text":"Southworth, G.","contributorId":51095,"corporation":false,"usgs":true,"family":"Southworth","given":"G.","email":"","affiliations":[],"preferred":false,"id":433073,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lindberg, S.","contributorId":71341,"corporation":false,"usgs":true,"family":"Lindberg","given":"S.","email":"","affiliations":[],"preferred":false,"id":433076,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hintelmann, H.","contributorId":64423,"corporation":false,"usgs":true,"family":"Hintelmann","given":"H.","email":"","affiliations":[],"preferred":false,"id":433075,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Amyot, M.","contributorId":85404,"corporation":false,"usgs":true,"family":"Amyot","given":"M.","email":"","affiliations":[],"preferred":false,"id":433080,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Poulain, A.","contributorId":86171,"corporation":false,"usgs":true,"family":"Poulain","given":"A.","email":"","affiliations":[],"preferred":false,"id":433081,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Bogle, M.","contributorId":71384,"corporation":false,"usgs":true,"family":"Bogle","given":"M.","email":"","affiliations":[],"preferred":false,"id":433077,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Peterson, M.","contributorId":71514,"corporation":false,"usgs":true,"family":"Peterson","given":"M.","affiliations":[],"preferred":false,"id":433078,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Rudd, J.","contributorId":92054,"corporation":false,"usgs":true,"family":"Rudd","given":"J.","email":"","affiliations":[],"preferred":false,"id":433082,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Harris, R. 0000-0002-9247-0768","orcid":"https://orcid.org/0000-0002-9247-0768","contributorId":13382,"corporation":false,"usgs":true,"family":"Harris","given":"R.","affiliations":[],"preferred":false,"id":433072,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Sandilands, K.","contributorId":101456,"corporation":false,"usgs":true,"family":"Sandilands","given":"K.","affiliations":[],"preferred":false,"id":433083,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Krabbenhoft, David P. 0000-0003-1964-5020 dpkrabbe@usgs.gov","orcid":"https://orcid.org/0000-0003-1964-5020","contributorId":118001,"corporation":false,"usgs":true,"family":"Krabbenhoft","given":"David P.","email":"dpkrabbe@usgs.gov","affiliations":[{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":false,"id":433079,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Olsen, Mark L.","contributorId":63852,"corporation":false,"usgs":true,"family":"Olsen","given":"Mark","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":433074,"contributorType":{"id":1,"text":"Authors"},"rank":12}]}}
,{"id":70031067,"text":"70031067 - 2007 - Post-middle Miocene origin of modern landforms in the eastern Piedmont of Virginia","interactions":[],"lastModifiedDate":"2020-03-27T06:45:38","indexId":"70031067","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3481,"text":"Stratigraphy","active":true,"publicationSubtype":{"id":10}},"title":"Post-middle Miocene origin of modern landforms in the eastern Piedmont of Virginia","docAbstract":"Diverse late middle Miocene dinoflagellate floras, obtained from two sites along the western edge of the Atlantic Coastal Plain in central Virginia, indicate that the eastern Virginia Piedmont was covered by marine waters about 12-13 Ma. This transgression extended farther westward across the Virginia Piedmont than any other transgression that has been documented. Extensive fluvial deposits that may be associated with this transgression covered earlier stream patterns in the eastern Piedmont and buried them beneath a thin (probably less than 100 foot-thick) veneer of sand and gravel. During the subsequent regression, a linear down-slope stream-drainage pattern developed. Although it has been somewhat modified by later stream captures, it still is easily recognizable. This interval of marine inundation and deposition explains why modern stream patterns in the eastern Piedmont of Virginia strongly resemble the stream patterns in the Coastal Plain and differ from the structurally adjusted trellis stream patterns typical of the western Piedmont, Blue Ridge, and Valley and Ridge regions. Uplift of the modern Southern Appalachian Mountains began at the time of this transgression and was largely completed by the late Pliocene.","language":"English","issn":"00262803","usgsCitation":"Weems, R.E., and Edwards, L.E., 2007, Post-middle Miocene origin of modern landforms in the eastern Piedmont of Virginia: Stratigraphy, v. 4, no. 1, p. 35-48.","productDescription":"14 p.","startPage":"35","endPage":"48","numberOfPages":"14","costCenters":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true},{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"links":[{"id":238779,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Virginia ","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -83.4521484375,\n              36.66841891894786\n            ],\n            [\n              -75.849609375,\n              36.59788913307022\n            ],\n            [\n              -76.0693359375,\n              37.54457732085582\n            ],\n            [\n              -76.6845703125,\n              38.85682013474361\n            ],\n            [\n              -77.87109375,\n              39.33429742980725\n            ],\n            [\n              -78.2666015625,\n              39.26628442213066\n            ],\n            [\n              -79.365234375,\n              38.54816542304656\n            ],\n            [\n              -80.2001953125,\n              37.43997405227057\n            ],\n            [\n              -81.5625,\n              37.16031654673677\n            ],\n            [\n              -81.9580078125,\n              37.47485808497102\n            ],\n            [\n              -83.4521484375,\n              36.66841891894786\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"4","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7e6ae4b0c8380cd7a522","contributors":{"authors":[{"text":"Weems, Robert E. 0000-0002-1907-7804 rweems@usgs.gov","orcid":"https://orcid.org/0000-0002-1907-7804","contributorId":2663,"corporation":false,"usgs":true,"family":"Weems","given":"Robert","email":"rweems@usgs.gov","middleInitial":"E.","affiliations":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true},{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"preferred":true,"id":429897,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Edwards, Lucy E. 0000-0003-4075-3317 leedward@usgs.gov","orcid":"https://orcid.org/0000-0003-4075-3317","contributorId":2647,"corporation":false,"usgs":true,"family":"Edwards","given":"Lucy","email":"leedward@usgs.gov","middleInitial":"E.","affiliations":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true},{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"preferred":true,"id":429896,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031086,"text":"70031086 - 2007 - Vertical distribution of fish biomass in Lake Superior: Implications for day bottom trawl surveys","interactions":[],"lastModifiedDate":"2016-05-02T12:54:30","indexId":"70031086","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2886,"text":"North American Journal of Fisheries Management","active":true,"publicationSubtype":{"id":10}},"title":"Vertical distribution of fish biomass in Lake Superior: Implications for day bottom trawl surveys","docAbstract":"<p><span>Evaluation of the biases in sampling methodology is essential for understanding the limitations of abundance and biomass estimates of fish populations. Estimates from surveys that rely solely on bottom trawls may be particularly vulnerable to bias if pelagic fish are numerous. We evaluated the variability in the vertical distribution of fish biomass during the U.S. Geological Survey's annual spring bottom trawl survey of Lake Superior using concurrent hydroacoustic observations to (1) test the assumption that fish are generally demersal during the day and (2) evaluate the potential for predictive models to improve bottom trawl&ndash;determined biomass estimates. Our results indicate that the assumption that fish exhibit demersal behavior during the annual spring bottom trawl survey in Lake Superior is unfounded. Bottom trawl biomass (B</span><sub>BT</sub><span>) estimates (mean &plusmn; SE) for species known to exhibit pelagic behavior (cisco Coregonus artedi, bloater C. hoyi, kiyi C. kiyi, and rainbow smelt Osmerus mordax; 3.01 &plusmn; 0.73 kg/ha) were not significantly greater than mean acoustic pelagic zone biomass (B</span><sub>APZ</sub><span>) estimates (6.39 &plusmn; 2.03 kg/ha). Mean B</span><sub>APZ</sub><span>&nbsp;estimates were 1.6- to 4.8-fold greater than mean B</span><sub>BT</sub><span>&nbsp;estimates over 4 years of sampling. The relationship between concurrent B</span><sub>APZ</sub><span>&nbsp;and B</span><sub>BT</sub><span>&nbsp;estimates was marginally significant and highly variable. Predicted B</span><sub>APZ</sub><span>&nbsp;estimates using cross-validation models were sensitive to adjustments for back-transforming from the logarithmic to the linear scale and poorly corresponded to observed B</span><sub>APZ</sub><span>&nbsp;estimates. We conclude that statistical models to predict B</span><sub>APZ</sub><span>&nbsp;from day B</span><sub>BT</sub><span>&nbsp;cannot be developed. We propose that night sampling with multiple gears will be necessary to generate better biomass estimates for management needs.</span></p>","language":"English","publisher":"Taylor & Francis","doi":"10.1577/M06-116.1","issn":"02755947","usgsCitation":"Stockwell, J., Yule, D., Hrabik, T., Adams, J., Gorman, O.T., and Holbrook, B., 2007, Vertical distribution of fish biomass in Lake Superior: Implications for day bottom trawl surveys: North American Journal of Fisheries Management, v. 27, no. 3, p. 735-749, https://doi.org/10.1577/M06-116.1.","productDescription":"15 p.","startPage":"735","endPage":"749","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":239046,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211704,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/M06-116.1"}],"volume":"27","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-08-01","publicationStatus":"PW","scienceBaseUri":"505bc234e4b08c986b32a9c7","contributors":{"authors":[{"text":"Stockwell, J.D.","contributorId":19678,"corporation":false,"usgs":true,"family":"Stockwell","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":429958,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Yule, D.L.","contributorId":78853,"corporation":false,"usgs":true,"family":"Yule","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":429960,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hrabik, T.R.","contributorId":95250,"corporation":false,"usgs":true,"family":"Hrabik","given":"T.R.","email":"","affiliations":[],"preferred":false,"id":429962,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Adams, J.V.","contributorId":94069,"corporation":false,"usgs":true,"family":"Adams","given":"J.V.","email":"","affiliations":[],"preferred":false,"id":429961,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Gorman, O. T.","contributorId":104605,"corporation":false,"usgs":true,"family":"Gorman","given":"O.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":429963,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Holbrook, B.V.","contributorId":43957,"corporation":false,"usgs":true,"family":"Holbrook","given":"B.V.","email":"","affiliations":[],"preferred":false,"id":429959,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031087,"text":"70031087 - 2007 - Occurrence and origin of minerals in a chamosite-bearing coal of Late Permian age, Zhaotong, Yunnan, China","interactions":[],"lastModifiedDate":"2012-03-12T17:21:18","indexId":"70031087","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":738,"text":"American Mineralogist","active":true,"publicationSubtype":{"id":10}},"title":"Occurrence and origin of minerals in a chamosite-bearing coal of Late Permian age, Zhaotong, Yunnan, China","docAbstract":"The minerals found in the no.5 coal (Late Permian) from the Zhaotong Coalfield, Yunnan Province, southwestern China, have been examined and found to consist mainly of kaolinite, pyrite, chamosite, quartz, and calcite, with trace amounts of illite and mixed-layer illite-smectite. The proportion of chamosite in clay minerals ranges from 32 to 56 wt%, with an average of 46 wt%. Chamosite is distributed not only in collodetrinite, but also occurs as cell fillings in fusinite, semifusinite, and telinite. The high content and mode of occurrence of chamosite in this mine indicate its formation by interaction of kaolinite with Fe-Mg-rich fluids during early diagenesis. Except for a minor amount of terfigenous quartz, most quartz is of authigenic origin and formed from kaolinite desilication. The calcite content of the no. 5 coal is 1.4-6.3% (with an average of 3%) and is distributed in collodetrinite and as cell fillings of coal-forming plants. Calcite originated from seawater invasion during peat accumulation. Pyrite occurs in several ways: as massive, framboidal, isolated enhedral/ anhedral, and euhedral forms. In addition, the presence of a large amount of pyritized red algae provides strong evidence of seawater invasion during peat accumulation. The red algae may have played an important role in the enrichment of sulfur in the coal. The characteristic assemblage of minerals in this mine resulted from a unique basinal environment in which the mineral matter was derived from a basaltic source region, volcanic activity, and seawater transgression during coal formation.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Mineralogist","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2138/am.2007.2496","issn":"0003004X","usgsCitation":"Dai, S., and Chou, C.L., 2007, Occurrence and origin of minerals in a chamosite-bearing coal of Late Permian age, Zhaotong, Yunnan, China: American Mineralogist, v. 92, no. 8-9, p. 1253-1261, https://doi.org/10.2138/am.2007.2496.","startPage":"1253","endPage":"1261","numberOfPages":"9","costCenters":[],"links":[{"id":211277,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2138/am.2007.2496"},{"id":238541,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"92","issue":"8-9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6b72e4b0c8380cd746d0","contributors":{"authors":[{"text":"Dai, S.","contributorId":9757,"corporation":false,"usgs":true,"family":"Dai","given":"S.","email":"","affiliations":[],"preferred":false,"id":429964,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chou, C. L.","contributorId":32655,"corporation":false,"usgs":false,"family":"Chou","given":"C.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":429965,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70032950,"text":"70032950 - 2007 - Metal accumulation in the earthworm Lumbricus rubellus. Model predictions compared to field data","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70032950","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1555,"text":"Environmental Pollution","active":true,"publicationSubtype":{"id":10}},"title":"Metal accumulation in the earthworm Lumbricus rubellus. Model predictions compared to field data","docAbstract":"The mechanistic bioaccumulation model OMEGA (Optimal Modeling for Ecotoxicological Applications) is used to estimate accumulation of zinc (Zn), copper (Cu), cadmium (Cd) and lead (Pb) in the earthworm Lumbricus rubellus. Our validation to field accumulation data shows that the model accurately predicts internal cadmium concentrations. In addition, our results show that internal metal concentrations in the earthworm are less than linearly (slope < 1) related to the total concentration in soil, while risk assessment procedures often assume the biota-soil accumulation factor (BSAF) to be constant. Although predicted internal concentrations of all metals are generally within a factor 5 compared to field data, incorporation of regulation in the model is necessary to improve predictability of the essential metals such as zinc and copper. ?? 2006 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Pollution","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.envpol.2006.06.033","issn":"02697491","usgsCitation":"Veltman, K., Huijbregts, M., Vijver, M., Peijnenburg, W., Hobbelen, P., Koolhaas, J., van Gestel, C., van Vliet, P., and Jan, H.A., 2007, Metal accumulation in the earthworm Lumbricus rubellus. Model predictions compared to field data: Environmental Pollution, v. 146, no. 2, p. 428-436, https://doi.org/10.1016/j.envpol.2006.06.033.","startPage":"428","endPage":"436","numberOfPages":"9","costCenters":[],"links":[{"id":477033,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://doi.org/10.1016/j.envpol.2006.06.033","text":"External Repository"},{"id":213144,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.envpol.2006.06.033"},{"id":240740,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"146","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a546de4b0c8380cd6cf95","contributors":{"authors":[{"text":"Veltman, K.","contributorId":10227,"corporation":false,"usgs":true,"family":"Veltman","given":"K.","email":"","affiliations":[],"preferred":false,"id":438666,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Huijbregts, M.A.J.","contributorId":58471,"corporation":false,"usgs":true,"family":"Huijbregts","given":"M.A.J.","affiliations":[],"preferred":false,"id":438670,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Vijver, M.G.","contributorId":98952,"corporation":false,"usgs":true,"family":"Vijver","given":"M.G.","email":"","affiliations":[],"preferred":false,"id":438674,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Peijnenburg, W.J.G.M.","contributorId":16659,"corporation":false,"usgs":true,"family":"Peijnenburg","given":"W.J.G.M.","email":"","affiliations":[],"preferred":false,"id":438667,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hobbelen, P.H.F.","contributorId":94493,"corporation":false,"usgs":true,"family":"Hobbelen","given":"P.H.F.","affiliations":[],"preferred":false,"id":438673,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Koolhaas, J.E.","contributorId":56439,"corporation":false,"usgs":true,"family":"Koolhaas","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":438669,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"van Gestel, C.A.M.","contributorId":60013,"corporation":false,"usgs":true,"family":"van Gestel","given":"C.A.M.","email":"","affiliations":[],"preferred":false,"id":438671,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"van Vliet, P.C.J.","contributorId":20553,"corporation":false,"usgs":true,"family":"van Vliet","given":"P.C.J.","email":"","affiliations":[],"preferred":false,"id":438668,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Jan, Hendriks A.","contributorId":80904,"corporation":false,"usgs":true,"family":"Jan","given":"Hendriks","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":438672,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70031098,"text":"70031098 - 2007 - The impact of metabolic state on Cd adsorption onto bacterial cells","interactions":[],"lastModifiedDate":"2023-07-26T12:12:39.543916","indexId":"70031098","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1751,"text":"Geobiology","active":true,"publicationSubtype":{"id":10}},"title":"The impact of metabolic state on Cd adsorption onto bacterial cells","docAbstract":"<div class=\"abstract-group \"><div class=\"article-section__content en main\"><p>This study examines the effect of bacterial metabolism on the adsorption of Cd onto Gram-positive and Gram-negative bacterial cells. Metabolically active Gram-positive cells adsorbed significantly less Cd than non-metabolizing cells. Gram-negative cells, however, showed no systematic difference in Cd adsorption between metabolizing and non-metabolizing cells. The effect of metabolism on Cd adsorption to Gram-positive cells was likely due to an influx of protons in and around the cell wall from the metabolic proton motive force, promoting competition between Cd and protons for adsorption sites on the cell wall. The relative lack of a metabolic effect on Cd adsorption onto Gram-negative compared to Gram-positive cells suggests that Cd binding in Gram-negative cells is focused in a region of the cell wall that is not reached, or is unaffected by this proton flux. Thermodynamic modeling was used to estimate that proton pumping causes the pH in the cell wall of metabolizing Gram-positive bacteria to decrease from the bulk solution value of 7.0 to approximately 5.7.</p></div></div>","language":"English","publisher":"Wiley","doi":"10.1111/j.1472-4669.2007.00111.x","issn":"14724677","usgsCitation":"Johnson, K., Ams, D., Wedel, A., Szymanowski, J., Weber, D., Schneegurt, M., and Fein, J., 2007, The impact of metabolic state on Cd adsorption onto bacterial cells: Geobiology, v. 5, no. 3, p. 211-218, https://doi.org/10.1111/j.1472-4669.2007.00111.x.","productDescription":"8 p.","startPage":"211","endPage":"218","numberOfPages":"8","costCenters":[],"links":[{"id":238681,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-06-11","publicationStatus":"PW","scienceBaseUri":"505bace9e4b08c986b323831","contributors":{"authors":[{"text":"Johnson, K.J.","contributorId":37148,"corporation":false,"usgs":true,"family":"Johnson","given":"K.J.","email":"","affiliations":[],"preferred":false,"id":430017,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ams, D.A.","contributorId":92049,"corporation":false,"usgs":true,"family":"Ams","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":430021,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wedel, A.N.","contributorId":10996,"corporation":false,"usgs":true,"family":"Wedel","given":"A.N.","email":"","affiliations":[],"preferred":false,"id":430016,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Szymanowski, J.E.S.","contributorId":86168,"corporation":false,"usgs":true,"family":"Szymanowski","given":"J.E.S.","email":"","affiliations":[],"preferred":false,"id":430020,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Weber, D.L.","contributorId":84150,"corporation":false,"usgs":true,"family":"Weber","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":430019,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Schneegurt, M.A.","contributorId":69777,"corporation":false,"usgs":true,"family":"Schneegurt","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":430018,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Fein, J.B.","contributorId":97257,"corporation":false,"usgs":true,"family":"Fein","given":"J.B.","email":"","affiliations":[],"preferred":false,"id":430022,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70031101,"text":"70031101 - 2007 - An analytical model of the mechanical properties of bulk coal under confined stress","interactions":[],"lastModifiedDate":"2012-03-12T17:21:17","indexId":"70031101","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1709,"text":"Fuel","active":true,"publicationSubtype":{"id":10}},"title":"An analytical model of the mechanical properties of bulk coal under confined stress","docAbstract":"This paper presents the development of an analytical model which can be used to relate the structural parameters of coal to its mechanical properties such as elastic modulus and Poisson's ratio under a confined stress condition. This model is developed primarily to support process modeling of coalbed methane (CBM) or CO2-enhanced CBM (ECBM) recovery from coal seam. It applied an innovative approach by which stresses acting on and strains occurring in coal are successively combined in rectangular coordinates, leading to the aggregated mechanical constants. These mechanical properties represent important information for improving CBM/ECBM simulations and incorporating within these considerations of directional permeability. The model, consisting of constitutive equations which implement a mechanically consistent stress-strains correlation, can be used as a generalized tool to study the mechanical and fluid behaviors of coal composites. An example using the model to predict the stress-strain correlation of coal under triaxial confined stress by accounting for the elastic and brittle (non-elastic) deformations is discussed. The result shows a good agreement between the prediction and the experimental measurement. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Fuel","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.fuel.2007.01.002","issn":"00162361","usgsCitation":"Wang, G., Wang, Z., Rudolph, V., Massarotto, P., and Finley, R., 2007, An analytical model of the mechanical properties of bulk coal under confined stress: Fuel, v. 86, no. 12-13, p. 1873-1884, https://doi.org/10.1016/j.fuel.2007.01.002.","startPage":"1873","endPage":"1884","numberOfPages":"12","costCenters":[],"links":[{"id":238746,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211455,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.fuel.2007.01.002"}],"volume":"86","issue":"12-13","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e9f9e4b0c8380cd48576","contributors":{"authors":[{"text":"Wang, G.X.","contributorId":36748,"corporation":false,"usgs":true,"family":"Wang","given":"G.X.","email":"","affiliations":[],"preferred":false,"id":430037,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wang, Z.T.","contributorId":25354,"corporation":false,"usgs":true,"family":"Wang","given":"Z.T.","email":"","affiliations":[],"preferred":false,"id":430036,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rudolph, V.","contributorId":10220,"corporation":false,"usgs":true,"family":"Rudolph","given":"V.","email":"","affiliations":[],"preferred":false,"id":430035,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Massarotto, P.","contributorId":40416,"corporation":false,"usgs":true,"family":"Massarotto","given":"P.","email":"","affiliations":[],"preferred":false,"id":430038,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Finley, R.J.","contributorId":70984,"corporation":false,"usgs":true,"family":"Finley","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":430039,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70033408,"text":"70033408 - 2007 - Landscape correlates along mourning dove call-count routes in Mississippi","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70033408","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":"Landscape correlates along mourning dove call-count routes in Mississippi","docAbstract":"Mourning dove (Zenaida macroura) call-count surveys in Mississippi, USA, suggest declining populations. We used available mourning dove call-count data to evaluate long-term mourning dove habitat relationships. Dove routes were located in the Mississippi Alluvial Valley, Deep Loess Province, Mid Coastal Plain, and Hilly Coastal Plain physiographic provinces of Mississippi. We also included routes in the Blackbelt Prairie region of Mississippi and Alabama, USA. We characterized landscape structure and composition within 1.64-km buffers around 10 selected mourning dove call-count routes during 3 time periods. Habitat classes included agriculture, forest, urban, regeneration stands, wetland, and woodlot. We used Akaike's Information Criterion to select the best candidate model. We selected a model containing percent agriculture and edge density that contained approximately 40% of the total variability in the data set. Percent agriculture was positively correlated with relative dove abundance. Interestingly, we found a negative relationship between edge density and dove abundance. Researchers should conduct future research on dove nesting patterns in Mississippi and threshold levels of edge necessary to maximize dove density. During the last 20 years, Mississippi lost more than 800,000 ha of cropland while forest cover represented largely by pine (Pinus taeda) plantations increased by more than 364,000 ha. Our results suggest observed localized declines in mourning dove abundance in Mississippi may be related to the documented conversion of agricultural lands to pine plantations.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2004-267","issn":"00225","usgsCitation":"Elmore, R., Vilella, F., and Gerard, P., 2007, Landscape correlates along mourning dove call-count routes in Mississippi: Journal of Wildlife Management, v. 71, no. 2, p. 422-427, https://doi.org/10.2193/2004-267.","startPage":"422","endPage":"427","numberOfPages":"6","costCenters":[],"links":[{"id":213142,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2004-267"},{"id":240737,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"71","issue":"2","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"505a4409e4b0c8380cd667d2","contributors":{"authors":[{"text":"Elmore, R.D.","contributorId":64450,"corporation":false,"usgs":true,"family":"Elmore","given":"R.D.","email":"","affiliations":[],"preferred":false,"id":440746,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vilella, F. J.","contributorId":82025,"corporation":false,"usgs":false,"family":"Vilella","given":"F. J.","affiliations":[],"preferred":false,"id":440747,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gerard, P.D.","contributorId":16368,"corporation":false,"usgs":true,"family":"Gerard","given":"P.D.","email":"","affiliations":[],"preferred":false,"id":440745,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
]}