{"pageNumber":"2327","pageRowStart":"58150","pageSize":"25","recordCount":184617,"records":[{"id":70029891,"text":"70029891 - 2007 - Organic compounds in produced waters from coalbed natural gas wells in the Powder River Basin, Wyoming, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:06","indexId":"70029891","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":835,"text":"Applied Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Organic compounds in produced waters from coalbed natural gas wells in the Powder River Basin, Wyoming, USA","docAbstract":"The organic composition of produced water samples from coalbed natural gas (CBNG) wells in the Powder River Basin, WY, sampled in 2001 and 2002 are reported as part of a larger study of the potential health and environmental effects of organic compounds derived from coal. The quality of CBNG produced waters is a potential environmental concern and disposal problem for CBNG producers, and no previous studies of organic compounds in CBNG produced water have been published. Organic compounds identified in the produced water samples included: phenols, biphenyls, N-, O-, and S-containing heterocyclic compounds, polycyclic aromatic hydrocarbons (PAHs), aromatic amines, various non-aromatic compounds, and phthalates. Many of the identified organic compounds (phenols, heterocyclic compounds, PAHs) are probably coal-derived. PAHs represented the group of organic compounds most commonly observed. Concentrations of total PAHs ranged up to 23 ??g/L. Concentrations of individual compounds ranged from about 18 to <0.01 ??g/L. Temporal variability of organic compound concentrations was documented, as two wells with relatively high organic compound contents in produced water in 2001 had much lower concentrations in 2002. In many areas, including the PRB, coal strata provide aquifers for drinking water wells. Organic compounds observed in produced water are also likely present in drinking water supplied from wells in the coal. Some of the organic compounds identified in the produced water samples are potentially toxic, but at the levels measured in these samples are unlikely to have acute health effects. The human health effects of low-level, chronic exposure to coal-derived organic compounds in drinking water are currently unknown. Continuing studies will evaluate possible toxic effects from low level, chronic exposure to coal-derived organic compounds in drinking water supplies.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Applied Geochemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.apgeochem.2007.04.010","issn":"08832927","usgsCitation":"Orem, W., Tatu, C., Lerch, H., Rice, C.A., Bartos, T., Bates, A., Tewalt, S., and Corum, M., 2007, Organic compounds in produced waters from coalbed natural gas wells in the Powder River Basin, Wyoming, USA: Applied Geochemistry, v. 22, no. 10, p. 2240-2256, https://doi.org/10.1016/j.apgeochem.2007.04.010.","startPage":"2240","endPage":"2256","numberOfPages":"17","costCenters":[],"links":[{"id":213039,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.apgeochem.2007.04.010"},{"id":240619,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"22","issue":"10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6f9ce4b0c8380cd75ba6","contributors":{"authors":[{"text":"Orem, W. H. 0000-0003-4990-0539","orcid":"https://orcid.org/0000-0003-4990-0539","contributorId":93084,"corporation":false,"usgs":true,"family":"Orem","given":"W. H.","affiliations":[],"preferred":false,"id":424754,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tatu, C. A.","contributorId":89942,"corporation":false,"usgs":false,"family":"Tatu","given":"C. A.","affiliations":[],"preferred":false,"id":424753,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lerch, H.E.","contributorId":100371,"corporation":false,"usgs":true,"family":"Lerch","given":"H.E.","email":"","affiliations":[],"preferred":false,"id":424755,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rice, C. A.","contributorId":106116,"corporation":false,"usgs":true,"family":"Rice","given":"C.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":424756,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bartos, T.T.","contributorId":6544,"corporation":false,"usgs":true,"family":"Bartos","given":"T.T.","email":"","affiliations":[],"preferred":false,"id":424749,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Bates, A. L. 0000-0002-4875-4675","orcid":"https://orcid.org/0000-0002-4875-4675","contributorId":42357,"corporation":false,"usgs":true,"family":"Bates","given":"A. L.","affiliations":[],"preferred":false,"id":424751,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Tewalt, S.","contributorId":68048,"corporation":false,"usgs":true,"family":"Tewalt","given":"S.","affiliations":[],"preferred":false,"id":424752,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Corum, M.D.","contributorId":35859,"corporation":false,"usgs":true,"family":"Corum","given":"M.D.","affiliations":[],"preferred":false,"id":424750,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70029888,"text":"70029888 - 2007 - Forward model nonlinearity versus inverse model nonlinearity","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029888","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":"Forward model nonlinearity versus inverse model nonlinearity","docAbstract":"The issue of concern is the impact of forward model nonlinearity on the nonlinearity of the inverse model. The question posed is, \"Does increased nonlinearity in the head solution (forward model) always result in increased nonlinearity in the inverse solution (estimation of hydraulic conductivity)?\" It is shown that the two nonlinearities are separate, and it is not universally true that increased forward model nonlinearity increases inverse model nonlinearity. ?? 2007 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2007.00372.x","issn":"0017467X","usgsCitation":"Mehl, S., 2007, Forward model nonlinearity versus inverse model nonlinearity: Ground Water, v. 45, no. 6, p. 791-794, https://doi.org/10.1111/j.1745-6584.2007.00372.x.","startPage":"791","endPage":"794","numberOfPages":"4","costCenters":[],"links":[{"id":212980,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2007.00372.x"},{"id":240555,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a137de4b0c8380cd5468b","contributors":{"authors":[{"text":"Mehl, S.","contributorId":20114,"corporation":false,"usgs":true,"family":"Mehl","given":"S.","affiliations":[],"preferred":false,"id":424742,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70029887,"text":"70029887 - 2007 - Porphyry Cu-Au and associated polymetallic Fe-Cu-Au deposits in the Beiya Area, western Yunnan Province, south China","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029887","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2954,"text":"Ore Geology Reviews","active":true,"publicationSubtype":{"id":10}},"title":"Porphyry Cu-Au and associated polymetallic Fe-Cu-Au deposits in the Beiya Area, western Yunnan Province, south China","docAbstract":"The Alkaline porphyries in the Beiya area are located east of the Jinshajiang suture, as part of a Cenozoic alkali-rich porphyry belt in western Yunnan. The main rock types include quartz-albite porphyry, quartz-K-feldspar porphyry and biotite-K-feldspar porphyry. These porphyries are characterised by high alkalinity [(K2O + Na2O)% > 10%], high silica (SiO2% > 65%), high Sr (> 400??ppm) and 87Sr/86Sr (> 0.706)] ratio and were intruded at 65.5??Ma, between 25.5 to 32.5??Ma, and about 3.8??Ma, respectively. There are five main types of mineral deposits in the Beiya area: (1) porphyry Cu-Au deposits, (2) magmatic Fe-Au deposits, (3) sedimentary polymetallic deposits, (4) polymetallic skarn deposits, and (5) palaeoplacers associated with karsts. The porphyry Cu-Au and polymetallic skarn deposits are associated with quartz-albite porphyry bodies. The Fe-Au and polymetallic sedimentary deposits are part of an ore-forming system that produced considerable Au in the Beiya area, and are characterised by low concentrations of La, Ti, and Co, and high concentrations of Y, Yb, and Sc. The Cenozoic porphyries in western Yunnan display increased alkalinity away from the Triassic Jinshajiang suture. Distribution of both the porphyries and sedimentary deposits in the Beiya area are interpreted to be related to partial melting in a disjointed region between upper mantle lithosphere of the Yangtze Plate and Gondwana continent, and lie within a shear zone between buried Palaeo-Tethyan oceanic lithosphere and upper mantle lithosphere, caused by the subduction and collision of India and Asia. ?? 2006 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ore Geology Reviews","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.oregeorev.2005.03.015","issn":"01691368","usgsCitation":"Xu, X., Cai, X., Xiao, Q., and Peters, S.G., 2007, Porphyry Cu-Au and associated polymetallic Fe-Cu-Au deposits in the Beiya Area, western Yunnan Province, south China: Ore Geology Reviews, v. 31, no. 1-4, p. 224-246, https://doi.org/10.1016/j.oregeorev.2005.03.015.","startPage":"224","endPage":"246","numberOfPages":"23","costCenters":[],"links":[{"id":212979,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.oregeorev.2005.03.015"},{"id":240554,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"31","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7de3e4b0c8380cd7a20e","contributors":{"authors":[{"text":"Xu, X.-W.","contributorId":23330,"corporation":false,"usgs":true,"family":"Xu","given":"X.-W.","email":"","affiliations":[],"preferred":false,"id":424738,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cai, X.-P.","contributorId":64449,"corporation":false,"usgs":true,"family":"Cai","given":"X.-P.","email":"","affiliations":[],"preferred":false,"id":424740,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Xiao, Q.-B.","contributorId":85779,"corporation":false,"usgs":true,"family":"Xiao","given":"Q.-B.","email":"","affiliations":[],"preferred":false,"id":424741,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Peters, S. G.","contributorId":48198,"corporation":false,"usgs":true,"family":"Peters","given":"S.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":424739,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029886,"text":"70029886 - 2007 - The relationship between productivities of salmonids and forest stands in northern California watersheds","interactions":[],"lastModifiedDate":"2013-03-24T15:08:02","indexId":"70029886","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3744,"text":"Western Journal of Applied Forestry","active":true,"publicationSubtype":{"id":10}},"title":"The relationship between productivities of salmonids and forest stands in northern California watersheds","docAbstract":"Productivities of resident salmonids and upland and riporian forests in 22 small watersheds of coastal northern California were estimated and compared to determine whether: 1) upland site productivity predicted riparian site productivity; 2) either upland or riparian site productivity predicted salmonid productivity; and 3) other parameters explained more of the variance in salmonid productivity. Upland and riparian site productivities were estimated using Site Index values for redwood (Sequoia sempervirens) and red alder (Alnus rubra), respectively. Salmonid productivity was indexed by back-calculated length at age 1 of the largest individuals sampled and by total biomass. Upland and riparian site indices were correlated, but neither factor contributed to the best approximating models of salmonid productivity. Total salmonid biomass was best described by a positive relationship with drainage area. Length of dominant fish was best described by a positive relationship with percentage of hardwoods within riparian areas, which may result from nutrient and/or litter subsidies provided by red older. The inability of forest productivity to predict salmon productivity may reflect insufficient variation in independent variables, limitations of the indices, and the operation of other factors affecting salmonid production. The lack of an apparent relationship between upland conifer and salmonid productivity suggests that management of land for timber productivity and component streams for salmonid production in these sites will require separate, albeit integrated, management strategies.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Western Journal of Applied Forestry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"08856095","usgsCitation":"Frazey, S., and Wilzbach, M., 2007, The relationship between productivities of salmonids and forest stands in northern California watersheds: Western Journal of Applied Forestry, v. 22, no. 2, p. 73-80.","startPage":"73","endPage":"80","numberOfPages":"8","costCenters":[],"links":[{"id":240524,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269924,"type":{"id":11,"text":"Document"},"url":"https://www.humboldt.edu/cuca/documents/publications/WJAF07.pdf"}],"volume":"22","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505baf1be4b08c986b324559","contributors":{"authors":[{"text":"Frazey, S.L.","contributorId":93705,"corporation":false,"usgs":true,"family":"Frazey","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":424737,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilzbach, M.A.","contributorId":48505,"corporation":false,"usgs":true,"family":"Wilzbach","given":"M.A.","affiliations":[],"preferred":false,"id":424736,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029885,"text":"70029885 - 2007 - Stress before and after the 2002 Denali fault earthquake","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029885","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":"Stress before and after the 2002 Denali fault earthquake","docAbstract":"Spatially averaged, absolute deviatoric stress tensors along the faults ruptured during the 2002 Denali fault earthquake, both before and after the event, are derived, using a new method, from estimates of the orientations of the principal stresses and the stress change associated with the earthquake. Stresses are estimated in three regions along the Denali fault, one of which also includes the Susitna Glacier fault, and one region along the Totschunda fault. Estimates of the spatially averaged shear stress before the earthquake resolved onto the faults that ruptured during the event range from near 1 MPa to near 4 MPa. Shear stresses estimated along the faults in all these regions after the event are near zero (0 ?? 1 MPa). These results suggest that deviatoric stresses averaged over a few tens of km along strike are low, and that the stress drop during the earthquake was complete or nearly so.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Research Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2007GL029189","issn":"00948276","usgsCitation":"Wesson, R.L., and Boyd, O., 2007, Stress before and after the 2002 Denali fault earthquake: Geophysical Research Letters, v. 34, no. 7, https://doi.org/10.1029/2007GL029189.","costCenters":[],"links":[{"id":477250,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2007gl029189","text":"Publisher Index Page"},{"id":212953,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007GL029189"},{"id":240523,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"34","issue":"7","noUsgsAuthors":false,"publicationDate":"2007-04-10","publicationStatus":"PW","scienceBaseUri":"505b9b51e4b08c986b31cdd3","contributors":{"authors":[{"text":"Wesson, R. L.","contributorId":51752,"corporation":false,"usgs":true,"family":"Wesson","given":"R.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":424734,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boyd, O.S.","contributorId":74479,"corporation":false,"usgs":true,"family":"Boyd","given":"O.S.","email":"","affiliations":[],"preferred":false,"id":424735,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029884,"text":"70029884 - 2007 - Fractal topography and subsurface water flows from fluvial bedforms to the continental shield","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029884","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":"Fractal topography and subsurface water flows from fluvial bedforms to the continental shield","docAbstract":"Surface-subsurface flow interactions are critical to a wide range of geochemical and ecological processes and to the fate of contaminants in freshwater environments. Fractal scaling relationships have been found in distributions of both land surface topography and solute efflux from watersheds, but the linkage between those observations has not been realized. We show that the fractal nature of the land surface in fluvial and glacial systems produces fractal distributions of recharge, discharge, and associated subsurface flow patterns. Interfacial flux tends to be dominated by small-scale features while the flux through deeper subsurface flow paths tends to be controlled by larger-scale features. This scaling behavior holds at all scales, from small fluvial bedforms (tens of centimeters) to the continental landscape (hundreds of kilometers). The fractal nature of surface-subsurface water fluxes yields a single scale-independent distribution of subsurface water residence times for both near-surface fluvial systems and deeper hydrogeological flows. Copyright 2007 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Research Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2007GL029426","issn":"00948276","usgsCitation":"Worman, A., Packman, A., Marklund, L., Harvey, J., and Stone, S., 2007, Fractal topography and subsurface water flows from fluvial bedforms to the continental shield: Geophysical Research Letters, v. 34, no. 7, https://doi.org/10.1029/2007GL029426.","costCenters":[],"links":[{"id":212952,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007GL029426"},{"id":240522,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"34","issue":"7","noUsgsAuthors":false,"publicationDate":"2007-04-04","publicationStatus":"PW","scienceBaseUri":"505a13a5e4b0c8380cd5470b","contributors":{"authors":[{"text":"Worman, A.","contributorId":105534,"corporation":false,"usgs":true,"family":"Worman","given":"A.","email":"","affiliations":[],"preferred":false,"id":424733,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Packman, A.I.","contributorId":37539,"corporation":false,"usgs":true,"family":"Packman","given":"A.I.","email":"","affiliations":[],"preferred":false,"id":424729,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Marklund, L.","contributorId":69786,"corporation":false,"usgs":true,"family":"Marklund","given":"L.","affiliations":[],"preferred":false,"id":424732,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Harvey, J. W. 0000-0002-2654-9873","orcid":"https://orcid.org/0000-0002-2654-9873","contributorId":39725,"corporation":false,"usgs":true,"family":"Harvey","given":"J. W.","affiliations":[],"preferred":false,"id":424730,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Stone, S.H.","contributorId":48763,"corporation":false,"usgs":true,"family":"Stone","given":"S.H.","email":"","affiliations":[],"preferred":false,"id":424731,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70029883,"text":"70029883 - 2007 - Geochemical proxies of North American freshwater routing during the Younger Dryas cold event","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029883","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3165,"text":"Proceedings of the National Academy of Sciences of the United States of America","active":true,"publicationSubtype":{"id":10}},"title":"Geochemical proxies of North American freshwater routing during the Younger Dryas cold event","docAbstract":"The Younger Dryas cold interval represents a time when much of the Northern Hemisphere cooled from ???12.9 to 11.5 kiloyears B.P. The cause of this event, which has long been viewed as the canonical example of abrupt climate change, was initially attributed to the routing of freshwater to the St. Lawrence River with an attendant reduction in Atlantic meridional overturning circulation. However, this mechanism has recently been questioned because current proxies and dating techniques have been unable to confirm that eastward routing with an increase in freshwater flux occurred during the Younger Dryas. Here we use new geochemical proxies (??Mg/Ca, U/Ca, and 87Sr/86Sr) measured in planktonic foraminifera at the mouth of the St. Lawrence estuary as tracers of freshwater sources to further evaluate this question. Our proxies, combined with planktonic ??18Oseawater and ??13C, confirm that routing of runoff from western Canada to the St. Lawrence River occurred at the start of the Younger Dryas, with an attendant increase in freshwater flux of 0.06 ?? 0.02 Sverdrup (1 Sverdrup = 106 m3??s-1). This base discharge increase is sufficient to have reduced Atlantic meridional overturning circulation and caused the Younger Dryas cold interval. In addition, our data indicate subsequent fluctuations in the freshwater flux to the St. Lawrence River of ???0.06-0.12 Sverdrup, thus explaining the variability in the overturning circulation and climate during the Younger Dryas. ?? 2007 by The National Academy of Sciences of the USA.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Proceedings of the National Academy of Sciences of the United States of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1073/pnas.0611313104","issn":"00278424","usgsCitation":"Carlson, A., Clark, P., Haley, B., Klinkhammer, G., Simmons, K., Brook, E., and Meissner, K.J., 2007, Geochemical proxies of North American freshwater routing during the Younger Dryas cold event: Proceedings of the National Academy of Sciences of the United States of America, v. 104, no. 16, p. 6556-6561, https://doi.org/10.1073/pnas.0611313104.","startPage":"6556","endPage":"6561","numberOfPages":"6","costCenters":[],"links":[{"id":477060,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://doi.org/10.1073/pnas.0611313104","text":"External Repository"},{"id":212924,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1073/pnas.0611313104"},{"id":240491,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"104","issue":"16","noUsgsAuthors":false,"publicationDate":"2007-04-17","publicationStatus":"PW","scienceBaseUri":"505a1696e4b0c8380cd551d4","contributors":{"authors":[{"text":"Carlson, A.E.","contributorId":54825,"corporation":false,"usgs":true,"family":"Carlson","given":"A.E.","email":"","affiliations":[],"preferred":false,"id":424725,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Clark, P.U.","contributorId":78449,"corporation":false,"usgs":true,"family":"Clark","given":"P.U.","email":"","affiliations":[],"preferred":false,"id":424727,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Haley, B.A.","contributorId":52047,"corporation":false,"usgs":true,"family":"Haley","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":424724,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Klinkhammer, G.P.","contributorId":86232,"corporation":false,"usgs":true,"family":"Klinkhammer","given":"G.P.","email":"","affiliations":[],"preferred":false,"id":424728,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Simmons, K.","contributorId":75333,"corporation":false,"usgs":true,"family":"Simmons","given":"K.","affiliations":[],"preferred":false,"id":424726,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Brook, E.J.","contributorId":23292,"corporation":false,"usgs":true,"family":"Brook","given":"E.J.","email":"","affiliations":[],"preferred":false,"id":424722,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Meissner, K. J.","contributorId":29704,"corporation":false,"usgs":false,"family":"Meissner","given":"K.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":424723,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70029881,"text":"70029881 - 2007 - Characterization of suspended particles in Everglades wetlands","interactions":[],"lastModifiedDate":"2018-10-16T11:02:45","indexId":"70029881","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2620,"text":"Limnology and Oceanography","active":true,"publicationSubtype":{"id":10}},"title":"Characterization of suspended particles in Everglades wetlands","docAbstract":"<p><span>We report the concentration, phosphorus (P) and nitrogen (N) content, and size and chemical fractionation of fine suspended particles (0.2‐100 µm) and colloids (3 kilodalton [kDa]‐0.1 µm) in the surface water of Everglades wetlands along regional and P‐enrichment gradients. Total suspended sediment concentrations ranged from 0.7 to 2.7 mg L</span><sup>−1</sup><span>. Total particulate P concentrations increased from 0.05 µmol L21 to 0.31 µmol L</span><sup>−1</sup><span>along the Penrichment gradient. Particles contained from 20% to 43% of total P but &lt;12% of total N in surface water. Dissolved (&lt;0.2 µm) organic N contained about 90% of total N, with the 3‐100‐kDa colloidal size class containing the most N of any size class. The 0.45‐2.7‐µm size fraction held the most particulate P at all sites, whereas particulate N was most abundant in the 2.7‐10‐µm size class at most sites. Standard chemical fractionation of particles identified acid‐hydrolyzable P as the most abundant species of particulate P, with little reactive or refractory organic P. Sequential chemical extraction revealed that about 65% of total particulate P was microbial, while about 25% was associated with humic and fulvic organic matter. The size and chemical fractionation information suggested that P‐rich particles mostly consisted of suspended bacteria. Suspended particles in Everglades wetlands were small in size and had low concentrations, yet they stored a large proportion of surface‐water P in intermediately reactive forms, but they held little N.</span></p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Limnology and Oceanography","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.4319/lo.2007.52.3.1166","issn":"00243590","usgsCitation":"Noe, G., Harvey, J.W., and Saiers, J.E., 2007, Characterization of suspended particles in Everglades wetlands: Limnology and Oceanography, v. 52, no. 3, p. 1166-1178, https://doi.org/10.4319/lo.2007.52.3.1166.","productDescription":"13 p.","startPage":"1166","endPage":"1178","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":477128,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.715.2908","text":"External Repository"},{"id":240457,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":265987,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.4319/lo.2007.52.3.1166"}],"country":"United States","state":"Florida","otherGeospatial":"Everglades wetlands","volume":"52","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-05-17","publicationStatus":"PW","scienceBaseUri":"5059f4dfe4b0c8380cd4bf8c","contributors":{"authors":[{"text":"Noe, Gregory B. 0000-0002-6661-2646 gnoe@usgs.gov","orcid":"https://orcid.org/0000-0002-6661-2646","contributorId":2332,"corporation":false,"usgs":true,"family":"Noe","given":"Gregory","email":"gnoe@usgs.gov","middleInitial":"B.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":false,"id":424717,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harvey, Judson W. 0000-0002-2654-9873 jwharvey@usgs.gov","orcid":"https://orcid.org/0000-0002-2654-9873","contributorId":1796,"corporation":false,"usgs":true,"family":"Harvey","given":"Judson","email":"jwharvey@usgs.gov","middleInitial":"W.","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":424715,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Saiers, James E.","contributorId":191842,"corporation":false,"usgs":false,"family":"Saiers","given":"James","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":424716,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029880,"text":"70029880 - 2007 - In situ hydrogen consumption kinetics as an indicator of subsurface microbial activity","interactions":[],"lastModifiedDate":"2018-10-17T12:44:23","indexId":"70029880","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1619,"text":"FEMS Microbiology Ecology","onlineIssn":"1574-6941","printIssn":"0168-6496","active":true,"publicationSubtype":{"id":10}},"title":"In situ hydrogen consumption kinetics as an indicator of subsurface microbial activity","docAbstract":"<p>There are few methods available for broadly assessing microbial community metabolism directly within a groundwater environment. In this study, hydrogen consumption rates were estimated from in situ injection/withdrawal tests conducted in two geochemically varying, contaminated aquifers as an approach towards developing such a method. The hydrogen consumption first-order rates varied from 0.002 nM h-1 for an uncontaminated, aerobic site to 2.5 nM h-1 for a contaminated site where sulfate reduction was a predominant process. The method could accommodate the over three orders of magnitude range in rates that existed between subsurface sites. In a denitrifying zone, the hydrogen consumption rate (0.02 nM h-1) was immediately abolished in the presence of air or an antibiotic mixture, suggesting that such measurements may also be sensitive to the effects of environmental perturbations on field microbial activities. Comparable laboratory determinations with sediment slurries exhibited hydrogen consumption kinetics that differed substantially from the field estimates. Because anaerobic degradation of organic matter relies on the rapid consumption of hydrogen and subsequent maintenance at low levels, such in situ measures of hydrogen turnover can serve as a key indicator of the functioning of microbial food webs and may be more reliable than laboratory determinations.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"FEMS Microbiology Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1574-6941.2007.00286.x","issn":"01686496","usgsCitation":"Harris, S., Smith, R.L., and Suflita, J.M., 2007, In situ hydrogen consumption kinetics as an indicator of subsurface microbial activity: FEMS Microbiology Ecology, v. 60, no. 2, p. 220-228, https://doi.org/10.1111/j.1574-6941.2007.00286.x.","productDescription":"9 p.","startPage":"220","endPage":"228","numberOfPages":"9","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":487621,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1574-6941.2007.00286.x","text":"Publisher Index Page"},{"id":212892,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1574-6941.2007.00286.x"},{"id":240456,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"60","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a39a4e4b0c8380cd619b7","contributors":{"authors":[{"text":"Harris, S.H.","contributorId":10950,"corporation":false,"usgs":true,"family":"Harris","given":"S.H.","email":"","affiliations":[],"preferred":false,"id":424712,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Smith, Richard L. 0000-0002-3829-0125 rlsmith@usgs.gov","orcid":"https://orcid.org/0000-0002-3829-0125","contributorId":1592,"corporation":false,"usgs":true,"family":"Smith","given":"Richard","email":"rlsmith@usgs.gov","middleInitial":"L.","affiliations":[{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":38175,"text":"Toxics Substances Hydrology Program","active":true,"usgs":true}],"preferred":true,"id":424714,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Suflita, Joseph M.","contributorId":187604,"corporation":false,"usgs":false,"family":"Suflita","given":"Joseph","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":424713,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029878,"text":"70029878 - 2007 - Development and implementation of a Bayesian-based aquifer vulnerability assessment in Florida","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029878","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2832,"text":"Natural Resources Research","onlineIssn":"1573-8981","printIssn":"1520-7439","active":true,"publicationSubtype":{"id":10}},"title":"Development and implementation of a Bayesian-based aquifer vulnerability assessment in Florida","docAbstract":"The Florida Aquifer Vulnerability Assessment (FAVA) was designed to provide a tool for environmental, regulatory, resource management, and planning professionals to facilitate protection of groundwater resources from surface sources of contamination. The FAVA project implements weights-of-evidence (WofE), a data-driven, Bayesian-probabilistic model to generate a series of maps reflecting relative aquifer vulnerability of Florida's principal aquifer systems. The vulnerability assessment process, from project design to map implementation is described herein in reference to the Floridan aquifer system (FAS). The WofE model calculates weighted relationships between hydrogeologic data layers that influence aquifer vulnerability and ambient groundwater parameters in wells that reflect relative degrees of vulnerability. Statewide model input data layers (evidential themes) include soil hydraulic conductivity, density of karst features, thickness of aquifer confinement, and hydraulic head difference between the FAS and the watertable. Wells with median dissolved nitrogen concentrations exceeding statistically established thresholds serve as training points in the WofE model. The resulting vulnerability map (response theme) reflects classified posterior probabilities based on spatial relationships between the evidential themes and training points. The response theme is subjected to extensive sensitivity and validation testing. Among the model validation techniques is calculation of a response theme based on a different water-quality indicator of relative recharge or vulnerability: dissolved oxygen. Successful implementation of the FAVA maps was facilitated by the overall project design, which included a needs assessment and iterative technical advisory committee input and review. Ongoing programs to protect Florida's springsheds have led to development of larger-scale WofE-based vulnerability assessments. Additional applications of the maps include land-use planning amendments and prioritization of land purchases to protect groundwater resources. ?? International Association for Mathematical Geology 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Natural Resources Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11053-007-9038-5","issn":"15207439","usgsCitation":"Arthur, J.D., Wood, H., Baker, A., Cichon, J., and Raines, G.L., 2007, Development and implementation of a Bayesian-based aquifer vulnerability assessment in Florida: Natural Resources Research, v. 16, no. 2, p. 93-107, https://doi.org/10.1007/s11053-007-9038-5.","startPage":"93","endPage":"107","numberOfPages":"15","costCenters":[],"links":[{"id":212867,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11053-007-9038-5"},{"id":240425,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-06-02","publicationStatus":"PW","scienceBaseUri":"505a0024e4b0c8380cd4f5ea","contributors":{"authors":[{"text":"Arthur, J. D.","contributorId":67924,"corporation":false,"usgs":true,"family":"Arthur","given":"J.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":424705,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wood, H.A.R.","contributorId":10623,"corporation":false,"usgs":true,"family":"Wood","given":"H.A.R.","email":"","affiliations":[],"preferred":false,"id":424703,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Baker, A.E.","contributorId":54022,"corporation":false,"usgs":true,"family":"Baker","given":"A.E.","email":"","affiliations":[],"preferred":false,"id":424704,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cichon, J.R.","contributorId":68115,"corporation":false,"usgs":true,"family":"Cichon","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":424706,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Raines, G. L.","contributorId":90720,"corporation":false,"usgs":true,"family":"Raines","given":"G.","middleInitial":"L.","affiliations":[],"preferred":false,"id":424707,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70029877,"text":"70029877 - 2007 - Mercury and selenium in American White Pelicans breeding at Pyramid Lake, Nevada","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029877","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3731,"text":"Waterbirds","onlineIssn":"19385390","printIssn":"15244695","active":true,"publicationSubtype":{"id":10}},"title":"Mercury and selenium in American White Pelicans breeding at Pyramid Lake, Nevada","docAbstract":"American White Pelicans (Pelecanus erythrorhynchos) that breed on Anaho Island, Pyramid Lake, Nevada, are potentially exposed to a variety of contaminants. Therefore, the reproductive success of this colony was monitored in 1996 and eggs, blood and feathers from nestlings, livers from adults and nestlings, regurgitated fish from nestlings, and fish from representative feeding areas were collected and analyzed for mercury and selenium to determine exposure to the pelicans and sources of contamination. Additional samples were collected and analyzed in 1988, 1992, and 2004. Reproductive success at the Anaho Island colony was normal in 1996 based on hatching rates of eggs (???75% in undisturbed areas) and survival of nestlings. Mercury and selenium concentrations in eggs were generally below known effect levels and did not appear to have an adverse impact on hatching success. Mercury and selenium concentrations in fish ranged widely, with mercury of greatest concern. Microscopic lesions characteristic of mercury toxicity were absent in pre-fledging nestlings in 1996. Some adult pelicans had elevated mercury concentrations in their livers; however, the potential toxic effects were difficult to evaluate because of probable demethylation of mercury, thereby possibly providing protection from toxicity. Exposure of pelicans to mercury varied among years, most likely in relation to wet-dry cycles and available feeding areas.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Waterbirds","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1675/1524-4695(2007)30[284:MASIAW]2.0.CO;2","issn":"15244695","usgsCitation":"Wiemeyer, S.N., Miesner, J., Tuttle, P.L., Murphy, E., Sileo, L., and Withers, D., 2007, Mercury and selenium in American White Pelicans breeding at Pyramid Lake, Nevada: Waterbirds, v. 30, no. 2, p. 284-295, https://doi.org/10.1675/1524-4695(2007)30[284:MASIAW]2.0.CO;2.","startPage":"284","endPage":"295","numberOfPages":"12","costCenters":[],"links":[{"id":212866,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1675/1524-4695(2007)30[284:MASIAW]2.0.CO;2"},{"id":240424,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"30","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a53e1e4b0c8380cd6cda2","contributors":{"authors":[{"text":"Wiemeyer, Stanley N.","contributorId":78279,"corporation":false,"usgs":true,"family":"Wiemeyer","given":"Stanley","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":424699,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Miesner, J.F.","contributorId":79509,"corporation":false,"usgs":true,"family":"Miesner","given":"J.F.","email":"","affiliations":[],"preferred":false,"id":424700,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tuttle, P. L.","contributorId":101280,"corporation":false,"usgs":true,"family":"Tuttle","given":"P.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":424702,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Murphy, E.C.","contributorId":86745,"corporation":false,"usgs":true,"family":"Murphy","given":"E.C.","email":"","affiliations":[],"preferred":false,"id":424701,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Sileo, L.","contributorId":46895,"corporation":false,"usgs":true,"family":"Sileo","given":"L.","email":"","affiliations":[],"preferred":false,"id":424698,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Withers, D.","contributorId":19370,"corporation":false,"usgs":true,"family":"Withers","given":"D.","email":"","affiliations":[],"preferred":false,"id":424697,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70029875,"text":"70029875 - 2007 - High-resolution shallow reflection seismic image and surface evidence of the Upper Tiber Basin active faults (Northern Apennines, Italy)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029875","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"High-resolution shallow reflection seismic image and surface evidence of the Upper Tiber Basin active faults (Northern Apennines, Italy)","docAbstract":"Shallow seismic reflection prospecting has been carried out in order to investigate the faults that bound to the southwest and northeast the Quaternary Upper Tiber Basin (Northern Apennines, Italy). On the northeastern margin of the basin a ??? 1 km long reflection seismic profile images a fault segment and the associated up to 100 meters thick sediment wedge. Across the southwestern margin a 0.5 km-long seismic profile images a 50-55??-dipping extensional fault, that projects to the scarp at the base of the range-front, and against which a 100 m thick syn-tectonic sediment wedge has formed. The integration of surface and sub-surface data allows to estimate at least 190 meters of vertical displacement along the fault and a slip rate around 0.25 m/kyr. Southwestern fault might also be interpreted as the main splay structure of regional Alto Tiberina extensional fault. At last, the 1917 Monterchi earthquake (Imax=X, Boschi et alii, 2000) is correlable with an activation of the southwestern fault, and thus suggesting the seismogenic character of this latter.","largerWorkTitle":"Bollettino della Societa Geologica Italiana","language":"English","issn":"00378763","usgsCitation":"Donne, D., Plccardi, L., Odum, J.K., Stephenson, W.J., and Williams, R.A., 2007, High-resolution shallow reflection seismic image and surface evidence of the Upper Tiber Basin active faults (Northern Apennines, Italy), <i>in</i> Bollettino della Societa Geologica Italiana, v. 126, no. 2, p. 323-331.","startPage":"323","endPage":"331","numberOfPages":"9","costCenters":[],"links":[{"id":240389,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"126","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3135e4b0c8380cd5dd17","contributors":{"authors":[{"text":"Donne, D.D.","contributorId":73075,"corporation":false,"usgs":true,"family":"Donne","given":"D.D.","email":"","affiliations":[],"preferred":false,"id":424691,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Plccardi, L.","contributorId":21833,"corporation":false,"usgs":true,"family":"Plccardi","given":"L.","email":"","affiliations":[],"preferred":false,"id":424690,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Odum, J. K.","contributorId":105705,"corporation":false,"usgs":true,"family":"Odum","given":"J.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":424694,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stephenson, W. J.","contributorId":87982,"corporation":false,"usgs":true,"family":"Stephenson","given":"W.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":424693,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Williams, R. A.","contributorId":82323,"corporation":false,"usgs":true,"family":"Williams","given":"R.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":424692,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70029874,"text":"70029874 - 2007 - Competition between hardwood hammocks and mangroves","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029874","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1478,"text":"Ecosystems","active":true,"publicationSubtype":{"id":10}},"title":"Competition between hardwood hammocks and mangroves","docAbstract":"The boundaries between mangroves and freshwater hammocks in coastal ecotones of South Florida are sharp. Further, previous studies indicate that there is a discontinuity in plant predawn water potentials, with woody plants either showing predawn water potentials reflecting exposure to saline water or exposure to freshwater. This abrupt concurrent change in community type and plant water status suggests that there might be feedback dynamics between vegetation and salinity. A model examining the salinity of the aerated zone of soil overlying a saline body of water, known as the vadose layer, as a function of precipitation, evaporation and plant water uptake is presented here. The model predicts that mixtures of saline and freshwater vegetative species represent unstable states. Depending on the initial vegetation composition, subsequent vegetative change will lead either to patches of mangrove coverage having a high salinity vadose zone or to freshwater hammock coverage having a low salinity vadose zone. Complete or nearly complete coverage by either freshwater or saltwater vegetation represents two stable steady-state points. This model can explain many of the previous observations of vegetation patterns in coastal South Florida as well as observations on the dynamics of vegetation shifts caused by sea level rise and climate change. ?? 2007 Springer Science+Business Media, LLC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecosystems","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10021-007-9050-y","issn":"14329840","usgsCitation":"Sternberg, L., Teh, S., Ewe, S., Miralles-Wilhelm, F., and DeAngelis, D., 2007, Competition between hardwood hammocks and mangroves: Ecosystems, v. 10, no. 4, p. 648-660, https://doi.org/10.1007/s10021-007-9050-y.","startPage":"648","endPage":"660","numberOfPages":"13","costCenters":[],"links":[{"id":212838,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10021-007-9050-y"},{"id":240388,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-05-22","publicationStatus":"PW","scienceBaseUri":"5059f8cce4b0c8380cd4d2d6","contributors":{"authors":[{"text":"Sternberg, L.D.S.L.","contributorId":41223,"corporation":false,"usgs":true,"family":"Sternberg","given":"L.D.S.L.","email":"","affiliations":[],"preferred":false,"id":424687,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Teh, S.Y.","contributorId":22969,"corporation":false,"usgs":true,"family":"Teh","given":"S.Y.","email":"","affiliations":[],"preferred":false,"id":424685,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ewe, S.M.L.","contributorId":78496,"corporation":false,"usgs":true,"family":"Ewe","given":"S.M.L.","email":"","affiliations":[],"preferred":false,"id":424688,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Miralles-Wilhelm, F.","contributorId":97325,"corporation":false,"usgs":true,"family":"Miralles-Wilhelm","given":"F.","affiliations":[],"preferred":false,"id":424689,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"DeAngelis, D.L. 0000-0002-1570-4057","orcid":"https://orcid.org/0000-0002-1570-4057","contributorId":32470,"corporation":false,"usgs":true,"family":"DeAngelis","given":"D.L.","affiliations":[],"preferred":false,"id":424686,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70029873,"text":"70029873 - 2007 - Effects of intraborehole flow on groundwater age distribution","interactions":[],"lastModifiedDate":"2018-10-11T19:02:24","indexId":"70029873","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1923,"text":"Hydrogeology Journal","active":true,"publicationSubtype":{"id":10}},"title":"Effects of intraborehole flow on groundwater age distribution","docAbstract":"<p>Environmental tracers are used to estimate groundwater ages and travel times, but the strongly heterogeneous nature of many subsurface environments can cause mixing between waters of highly disparate ages, adding additional complexity to the age-estimation process. Mixing may be exacerbated by the presence of wells because long open intervals or long screens with openings at multiple depths can transport water and solutes rapidly over a large vertical distance. The effect of intraborehole flow on groundwater age was examined numerically using direct age transport simulation coupled with the Multi-Node Well Package of MODFLOW. Ages in a homogeneous, anisotropic aquifer reached a predevelopment steady state possessing strong depth dependence. A nonpumping multi-node well was then introduced in one of three locations within the system. In all three cases, vertical transport along the well resulted in substantial changes in age distributions within the system. After a pumping well was added near the nonpumping multi-node well, ages were further perturbed by a flow reversal in the nonpumping multi-node well. Results indicated that intraborehole flow can substantially alter groundwater ages, but the effects are highly dependent on local or regional flow conditions and may change with time.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrogeology Journal","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10040-006-0139-8","issn":"14312174","usgsCitation":"Zinn, B., and Konikow, L.F., 2007, Effects of intraborehole flow on groundwater age distribution: Hydrogeology Journal, v. 15, no. 4, p. 633-643, https://doi.org/10.1007/s10040-006-0139-8.","productDescription":"11 p.","startPage":"633","endPage":"643","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240353,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212809,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10040-006-0139-8"}],"volume":"15","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-01-09","publicationStatus":"PW","scienceBaseUri":"505a0728e4b0c8380cd515ac","contributors":{"authors":[{"text":"Zinn, B.A.","contributorId":78153,"corporation":false,"usgs":true,"family":"Zinn","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":424684,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Konikow, Leonard F. 0000-0002-0940-3856 lkonikow@usgs.gov","orcid":"https://orcid.org/0000-0002-0940-3856","contributorId":158,"corporation":false,"usgs":true,"family":"Konikow","given":"Leonard","email":"lkonikow@usgs.gov","middleInitial":"F.","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":424683,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029871,"text":"70029871 - 2007 - Impacts of a gape limited Brook Trout, Salvelinus fontinalis, on larval Northwestern salamander, Ambystoma gracile, growth: A field enclosure experiment","interactions":[],"lastModifiedDate":"2017-11-15T13:31:32","indexId":"70029871","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2334,"text":"Journal of Herpetology","active":true,"publicationSubtype":{"id":10}},"title":"Impacts of a gape limited Brook Trout, Salvelinus fontinalis, on larval Northwestern salamander, Ambystoma gracile, growth: A field enclosure experiment","docAbstract":"The formation of amphibian population structure is directly affected by predation. Although aquatic predators have been shown to have direct negative effects on larval salamanders in laboratory and field experiments, the potential impacts of gape-limited fish on larval salamander growth has been largely underexplored. We designed an enclosure experiment conducted in situ to quantify the effects of gape-limited Brook Trout (Salvelinus fontinalis) on larval Northwestern Salamander (Ambystoma gracile) growth. We specifically tested whether the presence of fish too small to consume larvae had a negative effect on larval growth. The results of this study indicate that the presence of a gape-limited S. fontinalis can have a negative effect on growth of larval A. gracile salamanders. Copyright 2007 Society for the Study of Amphibians and Reptiles.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Herpetology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1670/0022-1511(2007)41[321:IOAGLB]2.0.CO;2","issn":"00221511","usgsCitation":"Currens, C., Liss, W., and Hoffman, R., 2007, Impacts of a gape limited Brook Trout, Salvelinus fontinalis, on larval Northwestern salamander, Ambystoma gracile, growth: A field enclosure experiment: Journal of Herpetology, v. 41, no. 2, p. 321-324, https://doi.org/10.1670/0022-1511(2007)41[321:IOAGLB]2.0.CO;2.","startPage":"321","endPage":"324","numberOfPages":"4","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":240317,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212779,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1670/0022-1511(2007)41[321:IOAGLB]2.0.CO;2"}],"volume":"41","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a38dfe4b0c8380cd61700","contributors":{"authors":[{"text":"Currens, C.R.","contributorId":10364,"corporation":false,"usgs":true,"family":"Currens","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":424672,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Liss, W.J.","contributorId":75887,"corporation":false,"usgs":true,"family":"Liss","given":"W.J.","email":"","affiliations":[],"preferred":false,"id":424674,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hoffman, R.L.","contributorId":28778,"corporation":false,"usgs":true,"family":"Hoffman","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":424673,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029870,"text":"70029870 - 2007 - PIT tags increase effectiveness of freshwater mussel recaptures","interactions":[],"lastModifiedDate":"2017-11-06T09:46:14","indexId":"70029870","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2564,"text":"Journal of the North American Benthological Society","onlineIssn":"1937-237X","printIssn":"0887-3593","active":true,"publicationSubtype":{"id":10}},"title":"PIT tags increase effectiveness of freshwater mussel recaptures","docAbstract":"Translocations are used increasingly to conserve populations of rare freshwater mussels. Recovery of translocated mussels is essential to accurate assessment of translocation success. We designed an experiment to evaluate the use of passive integrated transponder (PIT) tags to mark and track individual freshwater mussels. We used eastern lampmussels (Lampsilis radiata radiata) as a surrogate for 2 rare mussel species. We assessed internal and external PIT-tag retention in the laboratory and field. Internal tag retention was high (75-100%), and tag rejection occurred primarily during the first 3 wk after tagging. A thin layer of nacre coated internal tags 3 to 4 mo after insertion, suggesting that long-term retention is likely. We released mussels with external PIT tags at 3 field study sites and recaptured them with a PIT pack (mobile interrogation unit) 8 to 10 mo and 21 to 23 mo after release. Numbers of recaptured mussels differed among study sites; however, we found more tagged mussels with the PIT-pack searches with visual confirmation (72-80%) than with visual searches alone (30-47%) at all sites. PIT tags offer improved recapture of translocated mussels and increased accuracy of posttranslocation monitoring. ?? 2007 by The North American Benthological Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of the North American Benthological Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1899/0887-3593(2007)26[253:PTIEOF]2.0.CO;2","issn":"08873593","usgsCitation":"Kurth, J., Loftin, C., Zydlewski, J.D., and Rhymer, J., 2007, PIT tags increase effectiveness of freshwater mussel recaptures: Journal of the North American Benthological Society, v. 26, no. 2, p. 253-260, https://doi.org/10.1899/0887-3593(2007)26[253:PTIEOF]2.0.CO;2.","startPage":"253","endPage":"260","numberOfPages":"8","costCenters":[],"links":[{"id":240316,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212778,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1899/0887-3593(2007)26[253:PTIEOF]2.0.CO;2"}],"volume":"26","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a735ee4b0c8380cd76fc5","contributors":{"authors":[{"text":"Kurth, J.","contributorId":7504,"corporation":false,"usgs":true,"family":"Kurth","given":"J.","email":"","affiliations":[],"preferred":false,"id":424669,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Loftin, C.","contributorId":78939,"corporation":false,"usgs":true,"family":"Loftin","given":"C.","email":"","affiliations":[],"preferred":false,"id":424671,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zydlewski, Joseph D. 0000-0002-2255-2303 jzydlewski@usgs.gov","orcid":"https://orcid.org/0000-0002-2255-2303","contributorId":2004,"corporation":false,"usgs":true,"family":"Zydlewski","given":"Joseph","email":"jzydlewski@usgs.gov","middleInitial":"D.","affiliations":[{"id":199,"text":"Coop Res Unit Leetown","active":true,"usgs":true},{"id":365,"text":"Leetown Science Center","active":true,"usgs":true},{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"preferred":false,"id":424668,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rhymer, Judith","contributorId":63507,"corporation":false,"usgs":true,"family":"Rhymer","given":"Judith","email":"","affiliations":[],"preferred":false,"id":424670,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029868,"text":"70029868 - 2007 - Field-derived relationships for flow velocity and resistance in high-gradient streams","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029868","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Field-derived relationships for flow velocity and resistance in high-gradient streams","docAbstract":"We measured velocity and channel geometry in 10 reaches (bed gradient = 0.08-0.21) of a predominantly step-pool channel, the Rio Cordon, Italy, over a range of discharges (3-80% of the bankfull discharge). The resulting data were used to compute flow resistance. At-a-station hydraulic geometry relations indicate that in most reaches, the exponent describing the rate of velocity increases with discharge was between 0.48 and 0.6, which is within the range of published values for pool-riffle channels. The Rio Cordon data are also combined with published hydraulics data from step-pool streams to explore non-dimensional relationships between velocity and flow resistance and factors including unit discharge, channel gradient, and step geometry. Multiple regression analysis of this combined field dataset indicated that dimensionless unit discharge (q*) is the most important independent variable overall in explaining variations in velocity and flow resistance, followed by channel slope and the ratio of step height to step length. Empirical equations are provided both for dimensionless velocity and flow resistance, but prediction of the former variable appears more reliable. ?? 2007 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jhydrol.2007.03.021","issn":"00221694","usgsCitation":"Comiti, F., Mao, L., Wilcox, A., Wohl, E., and Lenzi, M., 2007, Field-derived relationships for flow velocity and resistance in high-gradient streams: Journal of Hydrology, v. 340, no. 1-2, p. 48-62, https://doi.org/10.1016/j.jhydrol.2007.03.021.","startPage":"48","endPage":"62","numberOfPages":"15","costCenters":[],"links":[{"id":212745,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2007.03.021"},{"id":240281,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"340","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0feee4b0c8380cd53a86","contributors":{"authors":[{"text":"Comiti, F.","contributorId":82130,"corporation":false,"usgs":true,"family":"Comiti","given":"F.","email":"","affiliations":[],"preferred":false,"id":424658,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mao, L.","contributorId":64894,"corporation":false,"usgs":true,"family":"Mao","given":"L.","email":"","affiliations":[],"preferred":false,"id":424657,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wilcox, A.","contributorId":62834,"corporation":false,"usgs":true,"family":"Wilcox","given":"A.","email":"","affiliations":[],"preferred":false,"id":424655,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wohl, E.E. 0000-0001-7435-5013","orcid":"https://orcid.org/0000-0001-7435-5013","contributorId":28753,"corporation":false,"usgs":true,"family":"Wohl","given":"E.E.","affiliations":[],"preferred":false,"id":424654,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lenzi, M.A.","contributorId":63622,"corporation":false,"usgs":true,"family":"Lenzi","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":424656,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70029867,"text":"70029867 - 2007 - Developments in seismic monitoring for risk reduction","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029867","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2447,"text":"Journal of Risk Research","active":true,"publicationSubtype":{"id":10}},"title":"Developments in seismic monitoring for risk reduction","docAbstract":"This paper presents recent state-of-the-art developments to obtain displacements and drift ratios for seismic monitoring and damage assessment of buildings. In most cases, decisions on safety of buildings following seismic events are based on visual inspections of the structures. Real-time instrumental measurements using GPS or double integration of accelerations, however, offer a viable alternative. Relevant parameters, such as the type of connections and structural characteristics (including storey geometry), can be estimated to compute drifts corresponding to several pre-selected threshold stages of damage. Drift ratios determined from real-time monitoring can then be compared to these thresholds in order to estimate damage conditions drift ratios. This approach is demonstrated in three steel frame buildings in San Francisco, California. Recently recorded data of strong shaking from these buildings indicate that the monitoring system can be a useful tool in rapid assessment of buildings and other structures following an earthquake. Such systems can also be used for risk monitoring, as a method to assess performance-based design and analysis procedures, for long-term assessment of structural characteristics of a building, and as a possible long-term damage detection tool.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Risk Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1080/13669870701447964","issn":"13669877","usgsCitation":"Çelebi, M., 2007, Developments in seismic monitoring for risk reduction: Journal of Risk Research, v. 10, no. 5, p. 715-727, https://doi.org/10.1080/13669870701447964.","startPage":"715","endPage":"727","numberOfPages":"13","costCenters":[],"links":[{"id":212719,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1080/13669870701447964"},{"id":240247,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0089e4b0c8380cd4f7a5","contributors":{"authors":[{"text":"Çelebi, M.","contributorId":36946,"corporation":false,"usgs":true,"family":"Çelebi","given":"M.","affiliations":[],"preferred":false,"id":424653,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70029865,"text":"70029865 - 2007 - An age-structured population model for horseshoe crabs in the Delaware Bay area to assess harvest and egg availability for shorebirds","interactions":[],"lastModifiedDate":"2021-05-27T17:39:43.455122","indexId":"70029865","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1584,"text":"Estuaries and Coasts","active":true,"publicationSubtype":{"id":10}},"title":"An age-structured population model for horseshoe crabs in the Delaware Bay area to assess harvest and egg availability for shorebirds","docAbstract":"<p>The objective of this simulation study was to create an age-structured population model for horseshoe crabs (<i>Limulus polyphenols</i>) in the Delaware Bay region using best available estimates of age-specific mortality and recent harvest levels. Density dependence was incorporated using a spatial model relating egg mortality with abundance of spawning females. Combinations of annual female harvest (0, 50, 100, and 200 thousand), timing of female harvest (before or after spawning), and three levels of density-dependent egg mortality were simulated. The probability of the population increasing was high (&gt; 80%) with low and medium egg mortality and harvest less than 200 thousand females per year. Under the high egg mortality case, the probability of the population increasing was &lt; 50% regardless of harvest. Harvest occurring after spawning increased the probability of population growth. The number of eggs available to shorebirds was highest when egg mortality was lowest and female abundance was at its highest levels. Although harvest and egg mortality influenced population growth and food availability to shorebirds, sensitivity and elasticity analyses showed that early-life stage mortality, age 0 mortality in particular, was the most important parameter for population growth. Our modeling results indicate areas where further research is needed and suggest effective management will involve a combination of harvest management and actions to increase early juvenile survival.&nbsp;</p>","language":"English","publisher":"SpringerLink","doi":"10.1007/BF02700170","usgsCitation":"Sweka, J., Smith, D., and Millard, M.J., 2007, An age-structured population model for horseshoe crabs in the Delaware Bay area to assess harvest and egg availability for shorebirds: Estuaries and Coasts, v. 30, no. 2, p. 277-286, https://doi.org/10.1007/BF02700170.","productDescription":"10 p.","startPage":"277","endPage":"286","costCenters":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"links":[{"id":240245,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Delaware","otherGeospatial":"Delaware Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -75.35522460937499,\n              38.976492485539396\n            ],\n            [\n              -75.2398681640625,\n              38.852542390364235\n            ],\n            [\n              -74.970703125,\n              38.843986129756615\n            ],\n            [\n              -75.0421142578125,\n              39.0831721934762\n            ],\n            [\n              -75.1849365234375,\n              39.18117526158749\n            ],\n            [\n              -75.4156494140625,\n              39.142842478062505\n            ],\n            [\n              -75.35522460937499,\n              38.976492485539396\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"30","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e9e7e4b0c8380cd48502","contributors":{"authors":[{"text":"Sweka, J. A.","contributorId":15015,"corporation":false,"usgs":false,"family":"Sweka","given":"J. A.","affiliations":[],"preferred":false,"id":424647,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Smith, D. R. 0000-0001-6074-9257","orcid":"https://orcid.org/0000-0001-6074-9257","contributorId":44108,"corporation":false,"usgs":true,"family":"Smith","given":"D. R.","affiliations":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"preferred":false,"id":424649,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Millard, M. J.","contributorId":40555,"corporation":false,"usgs":false,"family":"Millard","given":"M.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":424648,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029864,"text":"70029864 - 2007 - Soft-sediment deformation produced by tides in a meizoseismic area, Turnagain Arm, Alaska","interactions":[],"lastModifiedDate":"2012-03-12T17:21:09","indexId":"70029864","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":"Soft-sediment deformation produced by tides in a meizoseismic area, Turnagain Arm, Alaska","docAbstract":"Turnagain Arm is a semidiurnal hypertidal estuary in southeastern Alaska with a recorded tidal range of 9 m. Contorted bedding and flow rolls preserved in tidal sediments within the estuary have previously been interpreted as resulting from the Mw 9.2 Great Alaskan earthquake of 1964. Horizons of flow rolls between undeformed beds in sediments and rock strata have been used to infer ancient earthquakes in other areas. Although many types of soft-sediment deformation structures can be formed by earthquakes, observations of sedimentation on tidal flats in the inner parts of Turnagain Arm in the summers of 2003 and 2004 show that a wide range of soft-sediment deformation structures, similar to those inferred to have been formed by earthquakes, can form in macrotidal estuaries in the absence of seismic shock. During sedimentation rate measurements in 2004, soft-sediment deformation structures were recorded that formed during one day's tide, either in response to overpressurization of tidal flats during rapid tidal drawdown or by shear stress exerted on the bed by the passage of a 1.8 m tidal bore. Structures consisted of How rolls, dish structures, flames, and small dewatering pipes in a bed 17 cm thick. In the future, if the flow rolls in Turnagain Arm were found in isolated outcrops across an area 11 km in length, in an estuary known to have been influenced by large-magnitude earthquakes, would they be interpreted as seismites? These examples show that caution is needed when using horizons of flow rolls to infer paleoseismicity in estuarine deposits because many of the mechanisms (tidal flux, tidal bores, slumping, flooding) that can cause deformation in rapidly deposited, unconsolidated silts and sands, are orders of magnitude more common than great earthquakes. ?? 2007 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/G23209A.1","issn":"00917613","usgsCitation":"Greb, S., and Archer, A., 2007, Soft-sediment deformation produced by tides in a meizoseismic area, Turnagain Arm, Alaska: Geology, v. 35, no. 5, p. 435-438, https://doi.org/10.1130/G23209A.1.","startPage":"435","endPage":"438","numberOfPages":"4","costCenters":[],"links":[{"id":212686,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/G23209A.1"},{"id":240211,"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":"505b91d7e4b08c986b319b36","contributors":{"authors":[{"text":"Greb, S.F.","contributorId":48294,"corporation":false,"usgs":true,"family":"Greb","given":"S.F.","email":"","affiliations":[],"preferred":false,"id":424646,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Archer, A.W.","contributorId":8620,"corporation":false,"usgs":true,"family":"Archer","given":"A.W.","affiliations":[],"preferred":false,"id":424645,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029863,"text":"70029863 - 2007 - Using geochemistry as a tool for correlating proximal andesitic tephra: Case studies from Mt Rainier (USA) and Mt Ruapehu (New Zealand)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029863","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2437,"text":"Journal of Quaternary Science","active":true,"publicationSubtype":{"id":10}},"title":"Using geochemistry as a tool for correlating proximal andesitic tephra: Case studies from Mt Rainier (USA) and Mt Ruapehu (New Zealand)","docAbstract":"Volcanic hazards assessments at andesite stratovolcanoes rely on the assessment of frequency and magnitude of past events. The identification and correlation of proximal and distal andesitic tephra, which record the explosive eruptive history, are integral to such assessments. These tephra are potentially valuable stratigraphic marker beds useful to the temporal correlation and age dating of Quaternary volcanic, volcaniclastic and epiclastic sedimentary deposits with which they are interbedded. At Mt Ruapehu (New Zealand) and Mt Rainier (USA), much of the detail of the recent volcanic record remains unresolved because of the difficulty in identifying proximal tephra. This study investigates the value of geochemical methods in discriminating andesitic tephra. Our dataset comprises petrological and geochemical analyses of tephra that span the late Quaternary eruptive record of each volcano. Our data illustrate that andesitic tephra are remarkably heterogeneous in composition. Tephra compositions fluctuate widely over short time intervals, and there are no simple or systematic temporal trends in geochemistry within either eruptive record. This complexity in tephra geochemistry limits the application of geochemical approaches to tephrostratigraphic studies, beyond a general characterisation useful to provenance assignation. Petrological and geochemical data suggest that the products of andesite systems are inherently variable and therefore intractable to discrimination by simple geochemical methods alone. Copyright ?? 2006 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Quaternary Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/jqs.1065","issn":"02678179","usgsCitation":"Donoghue, S., Vallance, J., Smith, I., and Stewart, R., 2007, Using geochemistry as a tool for correlating proximal andesitic tephra: Case studies from Mt Rainier (USA) and Mt Ruapehu (New Zealand): Journal of Quaternary Science, v. 22, no. 4, p. 395-410, https://doi.org/10.1002/jqs.1065.","startPage":"395","endPage":"410","numberOfPages":"16","costCenters":[],"links":[{"id":212685,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/jqs.1065"},{"id":240210,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"22","issue":"4","noUsgsAuthors":false,"publicationDate":"2006-12-13","publicationStatus":"PW","scienceBaseUri":"505bc053e4b08c986b32a06d","contributors":{"authors":[{"text":"Donoghue, S.L.","contributorId":83741,"corporation":false,"usgs":true,"family":"Donoghue","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":424644,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vallance, J.","contributorId":41221,"corporation":false,"usgs":true,"family":"Vallance","given":"J.","email":"","affiliations":[],"preferred":false,"id":424642,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Smith, I.E.M.","contributorId":31983,"corporation":false,"usgs":true,"family":"Smith","given":"I.E.M.","email":"","affiliations":[],"preferred":false,"id":424641,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stewart, R.B.","contributorId":67289,"corporation":false,"usgs":true,"family":"Stewart","given":"R.B.","email":"","affiliations":[],"preferred":false,"id":424643,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029861,"text":"70029861 - 2007 - Long-term changes in abundance and diversity of macrophyte and waterfowl populations in an estuary with exotic macrophytes and improving water quality","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029861","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2620,"text":"Limnology and Oceanography","active":true,"publicationSubtype":{"id":10}},"title":"Long-term changes in abundance and diversity of macrophyte and waterfowl populations in an estuary with exotic macrophytes and improving water quality","docAbstract":"We assessed species-specific coverage (km2) of a submerged aquatic vegetation (SAV) community in the fresh and upper oligohaline Potomac Estuary from 1985 to 2001 using a method combining field observations of species-proportional coverage data with congruent remotely sensed coverage and density (percent canopy cover) data. Biomass (estimated by density-weighted coverage) of individual species was calculated. Under improving water quality conditions, exotic SAV species did not displace native SAV; rather, the percent of natives increased over time. While coverage-based diversity did fluctuate and increased, richness-based community turnover rates were not significantly different from zero. SAV diversity was negatively related to nitrogen concentration. Differences in functional traits, such as reproductive potential, between the dominant native and exotic species may explain some interannual patterns in SAV. Biomass of native, as well as exotic, SAV species varied with factors affecting water column light attenuation. We also show a positive response by a higher trophic level, waterfowl, to SAV communities dominated by exotic SAV from 1959 to 2001. ?? 2007, by the American Society of Limnology and Oceanography, Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Limnology and Oceanography","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00243590","usgsCitation":"Rybicki, N.B., and Landwehr, J., 2007, Long-term changes in abundance and diversity of macrophyte and waterfowl populations in an estuary with exotic macrophytes and improving water quality: Limnology and Oceanography, v. 52, no. 3, p. 1195-1207.","startPage":"1195","endPage":"1207","numberOfPages":"13","costCenters":[],"links":[{"id":240178,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"52","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a497be4b0c8380cd68647","contributors":{"authors":[{"text":"Rybicki, N. B.","contributorId":97504,"corporation":false,"usgs":true,"family":"Rybicki","given":"N.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":424636,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Landwehr, J.M.","contributorId":39815,"corporation":false,"usgs":true,"family":"Landwehr","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":424635,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029859,"text":"70029859 - 2007 - Numerical dating of a Late Quaternary spit-shoreline complex at the northern end of Silver Lake playa, Mojave Desert, California: A comparison of the applicability of radiocarbon, luminescence, terrestrial cosmogenic nuclide, electron spin resonance, U-series and amino acid racemization methods","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70029859","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3217,"text":"Quaternary International","active":true,"publicationSubtype":{"id":10}},"title":"Numerical dating of a Late Quaternary spit-shoreline complex at the northern end of Silver Lake playa, Mojave Desert, California: A comparison of the applicability of radiocarbon, luminescence, terrestrial cosmogenic nuclide, electron spin resonance, U-series and amino acid racemization methods","docAbstract":"A Late Quaternary spit-shoreline complex on the northern shore of Pleistocene Lake Mojave of southeastern California, USA was studied with the goal of comparing accelerator mass spectrometry (AMS) radiocarbon, luminescence, electron spin resonance (ESR), terrestrial cosmogenic radionuclide (TCN) surface exposure, amino acid racemization (AAR) and U-series dating methods. The pattern of ages obtained by the different methods illustrates the complexity of processes acting in the lakeshore environment and highlights the utility of a multi-method approach. TCN surface exposure ages (mostly ???20-30 ka) record the initial erosion of shoreline benches, whereas radiocarbon ages on shells (determined in this and previous studies) within the spit, supported by AAR data, record its construction at fluctuating lake levels from ???16 to 10 ka. Luminescence ages on spit sediment (???6-7 ka) and ESR ages on spit shells (???4 ka) are anomalously young relative to radiocarbon ages of shells within the same deposits. The significance of the surprisingly young luminescence ages is not clear. The younger ESR ages could be a consequence of post-mortem enrichment of U in the shells. High concentrations of detrital thorium in tufa coating spit gravels inhibited the use of single-sample U-series dating. Detailed comparisons such as this provide one of the few means of assessing the accuracy of Quaternary dating techniques. More such comparisons are needed. ?? 2007 Elsevier Ltd and INQUA.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary International","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.quaint.2007.01.001","issn":"10406182","usgsCitation":"Owen, L., Bright, J., Finkel, R., Jaiswal, M., Kaufman, D.S., Mahan, S., Radtke, U., Schneider, J., Sharp, W., Singhvi, A., and Warren, C., 2007, Numerical dating of a Late Quaternary spit-shoreline complex at the northern end of Silver Lake playa, Mojave Desert, California: A comparison of the applicability of radiocarbon, luminescence, terrestrial cosmogenic nuclide, electron spin resonance, U-series and amino acid racemization methods: Quaternary International, v. 166, no. 1, p. 87-110, https://doi.org/10.1016/j.quaint.2007.01.001.","startPage":"87","endPage":"110","numberOfPages":"24","costCenters":[],"links":[{"id":213093,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.quaint.2007.01.001"},{"id":240682,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"166","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a68ebe4b0c8380cd73a82","contributors":{"authors":[{"text":"Owen, L.A.","contributorId":94836,"corporation":false,"usgs":true,"family":"Owen","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":424631,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bright, Jordon","contributorId":63981,"corporation":false,"usgs":false,"family":"Bright","given":"Jordon","affiliations":[{"id":7042,"text":"University of Arizona","active":true,"usgs":false}],"preferred":false,"id":424628,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Finkel, R.C.","contributorId":79677,"corporation":false,"usgs":true,"family":"Finkel","given":"R.C.","email":"","affiliations":[],"preferred":false,"id":424630,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jaiswal, M.K.","contributorId":18183,"corporation":false,"usgs":true,"family":"Jaiswal","given":"M.K.","email":"","affiliations":[],"preferred":false,"id":424624,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kaufman, D. S.","contributorId":18006,"corporation":false,"usgs":false,"family":"Kaufman","given":"D.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":424623,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Mahan, S.","contributorId":98894,"corporation":false,"usgs":true,"family":"Mahan","given":"S.","email":"","affiliations":[],"preferred":false,"id":424632,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Radtke, U.","contributorId":9003,"corporation":false,"usgs":true,"family":"Radtke","given":"U.","email":"","affiliations":[],"preferred":false,"id":424622,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Schneider, J.S.","contributorId":57271,"corporation":false,"usgs":true,"family":"Schneider","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":424626,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Sharp, W.","contributorId":52402,"corporation":false,"usgs":true,"family":"Sharp","given":"W.","affiliations":[],"preferred":false,"id":424625,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Singhvi, A.K.","contributorId":64435,"corporation":false,"usgs":true,"family":"Singhvi","given":"A.K.","email":"","affiliations":[],"preferred":false,"id":424629,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Warren, C.N.","contributorId":63340,"corporation":false,"usgs":true,"family":"Warren","given":"C.N.","email":"","affiliations":[],"preferred":false,"id":424627,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}}
,{"id":70029858,"text":"70029858 - 2007 - Invasive species and coal bed methane development in the Powder River Basin, Wyoming","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70029858","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1552,"text":"Environmental Monitoring and Assessment","onlineIssn":"1573-2959","printIssn":"0167-6369","active":true,"publicationSubtype":{"id":10}},"title":"Invasive species and coal bed methane development in the Powder River Basin, Wyoming","docAbstract":"One of the fastest growing areas of natural gas production is coal bed methane (CBM) due to the large monetary returns and increased demand for energy from consumers. The Powder River Basin, Wyoming is one of the most rapidly expanding areas of CBM development with projections of the establishment of up to 50,000 wells. CBM disturbances may make the native ecosystem more susceptible to invasion by non-native species, but there are few studies that have been conducted on the environmental impacts of this type of resource extraction. To evaluate the potential effects of CBM development on native plant species distribution and patterns of non-native plant invasion, 36 modified Forest Inventory and Analysis plots (each comprised of four 168-m2 subplots) were established in the Powder River Basin, Wyoming. There were 73 168-m2 subplots on control sites; 42 subplots on secondary disturbances; 14 on major surface disturbances; eight on well pads; and seven on sites downslope of CBM wells water discharge points. Native plant species cover ranged from 39.5 ?? 2.7% (mean ?? 1 SE) in the secondary disturbance subplots to 17.7 ?? 7.5% in the pad subplots. Non-native plant species cover ranged from 31.0 ?? 8.4% in the discharge areas to 14.7 ?? 8.9% in the pad subplots. The control subplots had significantly less non-native species richness than the combined disturbance types. The combined disturbance subplots had significantly greater soil salinity than the control sites. These results suggest that CBM development and associated disturbances may facilitate the establishment of non-native plants. Future research and management decisions should consider the accumulative landscape-scale effects of CBM development on preserving native plant diversity. ?? Springer Science+Business Media B.V. 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Monitoring and Assessment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10661-006-9321-7","issn":"01676369","usgsCitation":"Bergquist, E., Evangelista, P., Stohlgren, T., and Alley, N., 2007, Invasive species and coal bed methane development in the Powder River Basin, Wyoming: Environmental Monitoring and Assessment, v. 128, no. 1-3, p. 381-394, https://doi.org/10.1007/s10661-006-9321-7.","startPage":"381","endPage":"394","numberOfPages":"14","costCenters":[],"links":[{"id":213092,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10661-006-9321-7"},{"id":240681,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"128","issue":"1-3","noUsgsAuthors":false,"publicationDate":"2006-10-03","publicationStatus":"PW","scienceBaseUri":"505a3e26e4b0c8380cd63b44","contributors":{"authors":[{"text":"Bergquist, E.","contributorId":43969,"corporation":false,"usgs":true,"family":"Bergquist","given":"E.","email":"","affiliations":[],"preferred":false,"id":424620,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Evangelista, P.","contributorId":21903,"corporation":false,"usgs":true,"family":"Evangelista","given":"P.","email":"","affiliations":[],"preferred":false,"id":424619,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Stohlgren, T.J.","contributorId":7217,"corporation":false,"usgs":true,"family":"Stohlgren","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":424618,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Alley, N.","contributorId":86723,"corporation":false,"usgs":true,"family":"Alley","given":"N.","email":"","affiliations":[],"preferred":false,"id":424621,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029857,"text":"70029857 - 2007 - Biomarkers of contaminant exposure in northern pike (Esox lucius) from the Yukon River Basin, Alaska","interactions":[],"lastModifiedDate":"2016-06-01T15:26:02","indexId":"70029857","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":887,"text":"Archives of Environmental Contamination and Toxicology","active":true,"publicationSubtype":{"id":10}},"title":"Biomarkers of contaminant exposure in northern pike (Esox lucius) from the Yukon River Basin, Alaska","docAbstract":"<p>As part of a larger investigation, northern pike (n = 158; Esox lucius) were collected from ten sites in the Yukon River Basin (YRB), Alaska, to document biomarkers and their correlations with organochlorine pesticide (total p,p'-DDT, total chlordane, dieldrin, and toxaphene), total polychlorinated biphenyls (PCBs), and elemental contaminant (arsenic, cadmium, copper, lead, total mercury, selenium, and zinc) concentrations. A suite of biomarkers including somatic indices, hepatic 7-ethoxyresorufin O-deethylase (EROD) activity, vitellogenin concentrations, steroid hormone (17B- ustradiol and 16-kebtestosteront) concentrations, splenic macrophage aggregates (MAs), oocyte atresia, and other microscopic anomalies in various tissues were documented in YRB pike. Mean condition factor (0.50 to 0.68), hepatosomatic index (1.00% to 3.56%), and splenosomatic index (0.09% to 0.18%) were not anomalous at any site nor correlated with any contaminant concentration. Mean EROD activity (0.71 to 17.51 pmol/min/mg protein) was similar to basal activity levels previously measured in pike and was positively correlated with selenium concentrations (r = 0.88, P &lt; 0.01). Vitellogenin concentrations in female (0.09 to 5.32 mg/mL) and male (0.01 mg/mL in male pike from multiple sites indicated exposure to estrogenic compounds. Mean steroid hormone concentrations and percent oocyte atresia were not anomalous in pike from any YRB site. Few site differences were significant for mean MA density (1.86 to 6.42 MA/mm2), size (812 to 1481 ??m2), and tissue occupied (MA-%; 0.24% to 0.75%). A linear regression between MA-% and total PCBs was significant, although PCB concentrations were generally low in YRB pike (???63 ng/g), and MA-% values in female pike (0.24% to 0.54%) were lower than in male pike (0.32% to 0.75%) at similar PCB concentrations. Greater numbers of MAs were found as zinc concentrations increased in YRB female pike, but it is unlikely that this is a causative relationship. Histological abnormalities observed in gill, liver, spleen, and kidney tissues were not likely a result of contaminant exposure but provide information on the general health of YRB pike. The most common histologic anomalies were parasitic infestations in various organs and developing nephrons and nephrocalcinosis in posterior kidney tissues. Overall, few biomarker responses in YRB pike were correlated with chemical contaminant concentrations, and YRB pike generally appeared to be healthy with no site having multiple anomalous biomarker responses. ?? 2007 Springer Science+Business Media, LLC.</p>","language":"English","publisher":"Springer-Verlag","doi":"10.1007/s00244-006-0134-z","issn":"00904341","usgsCitation":"Hinck, J., Blazer, V., Denslow, N., Myers, M., Gross, T., and Tillitt, D.E., 2007, Biomarkers of contaminant exposure in northern pike (Esox lucius) from the Yukon River Basin, Alaska: Archives of Environmental Contamination and Toxicology, v. 52, no. 4, p. 549-562, https://doi.org/10.1007/s00244-006-0134-z.","productDescription":"14 p.","startPage":"549","endPage":"562","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"links":[{"id":240649,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213065,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00244-006-0134-z"}],"country":"United States","state":"Alaska","otherGeospatial":"Yukon River Basin","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -164.4873046875,\n              62.825055614564306\n            ],\n            [\n              -163.80615234375,\n              62.72453320538486\n            ],\n            [\n              -163.2568359375,\n              62.21675570485806\n            ],\n            [\n              -160.99365234375,\n              62.84511898552855\n            ],\n            [\n              -159.03808593749997,\n              64.8115572502203\n            ],\n            [\n              -152.90771484375,\n              65.9554260417959\n            ],\n            [\n              -145.9423828125,\n              66.93006025862448\n            ],\n            [\n              -143.76708984375,\n              66.67038675925365\n            ],\n            [\n              -141.48193359375,\n              65.5766364488888\n            ],\n            [\n              -146.44775390625,\n              63.68524808030715\n            ],\n            [\n              -153.0615234375,\n              64.50118574349311\n            ],\n            [\n              -157.1484375,\n              63.6560114418332\n            ],\n            [\n              -160.3564453125,\n              61.40723633876356\n            ],\n            [\n              -165.30029296875,\n              61.96994329935751\n            ],\n            [\n              -165.47607421874997,\n              62.27814559876582\n            ],\n            [\n              -164.94873046875,\n              62.895217544882044\n            ],\n            [\n              -164.4873046875,\n              62.825055614564306\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"52","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-03-29","publicationStatus":"PW","scienceBaseUri":"5059f189e4b0c8380cd4aca8","contributors":{"authors":[{"text":"Hinck, J.E.","contributorId":47560,"corporation":false,"usgs":true,"family":"Hinck","given":"J.E.","affiliations":[],"preferred":false,"id":424612,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Blazer, V. 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