Deepwater sculpin (Myoxocephalus thompsonii) were abundant in Lake Ontario in the 1920s and at least common into the 1940s. By the 1960s they were rare and, thereafter, some considered the population extirpated even though a synoptic survey of the lake in 1972 produced three, relatively large (148–165 mm total length, TL), and presumably old, specimens from the northern half of the lake. Deepwater sculpin were absent from annual survey catches in the 1980s and did not reappear until 1996, when three were caught in northern Lake Ontario. Isolated collections of deepwater sculpin continued during 1998–2004. Catches during 1996–2004 included five smaller individuals, 89–118 mm TL. In 2005, catches increased sharply, with 18 deepwater sculpin collected from southern waters and one from northern waters. Moreover, young, small sculpin were dominant in 2005—16 of the 19 sculpins averaged 68 ± 12 mm total length (± 1 s.d.). The young fish observed since 1996 could have originated from reproduction by the small in-lake population, from downstream drift of planktonic larvae from Lake Huron, or both. The presence of juveniles is a clear sign that conditions for survival of young deepwater sculpin are becoming more favorable, perhaps because of reduced abundance of alewife (Alosa pseudoharengus), a pelagic planktivore linked to depression of deepwater sculpin in Lake Michigan, and also low abundances of burbot (Lota lota) and lake trout (Salvelinus namaycush), benthic piscivores.
","language":"English","publisher":"International Association for Great Lakes Research","doi":"10.3394/0380-1330(2007)33[34:RODSIL]2.0.CO;2","issn":"03801330","usgsCitation":"Lantry, B., O'Gorman, R., Walsh, M.G., Casselman, J., Hoyle, J., Keir, M., and Lantry, J., 2007, Reappearance of deepwater sculpin in Lake Ontario: Resurgence or last gasp of a doomed population?: Journal of Great Lakes Research, v. 33, no. Supplement 1, p. 34-45, https://doi.org/10.3394/0380-1330(2007)33[34:RODSIL]2.0.CO;2.","productDescription":"12 p.","startPage":"34","endPage":"45","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":240514,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212945,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3394/0380-1330(2007)33[34:RODSIL]2.0.CO;2"}],"volume":"33","issue":"Supplement 1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a95b3e4b0c8380cd81bac","contributors":{"authors":[{"text":"Lantry, B.F.","contributorId":19105,"corporation":false,"usgs":true,"family":"Lantry","given":"B.F.","email":"","affiliations":[],"preferred":false,"id":424091,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"O'Gorman, R.","contributorId":48896,"corporation":false,"usgs":true,"family":"O'Gorman","given":"R.","affiliations":[],"preferred":false,"id":424096,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Walsh, M. G.","contributorId":72172,"corporation":false,"usgs":true,"family":"Walsh","given":"M.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":424097,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Casselman, J.M.","contributorId":35278,"corporation":false,"usgs":true,"family":"Casselman","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":424095,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hoyle, J.A.","contributorId":23903,"corporation":false,"usgs":true,"family":"Hoyle","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":424093,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Keir, M.J.","contributorId":26518,"corporation":false,"usgs":true,"family":"Keir","given":"M.J.","email":"","affiliations":[],"preferred":false,"id":424094,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Lantry, J.R.","contributorId":20972,"corporation":false,"usgs":true,"family":"Lantry","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":424092,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70029741,"text":"70029741 - 2007 - Influence of fluctuating water levels on mercury concentrations in adult walleye","interactions":[],"lastModifiedDate":"2012-03-12T17:21:06","indexId":"70029741","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1103,"text":"Bulletin of Environmental Contamination and Toxicology","active":true,"publicationSubtype":{"id":10}},"title":"Influence of fluctuating water levels on mercury concentrations in adult walleye","docAbstract":"[No abstract available]","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of Environmental Contamination and Toxicology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s00128-007-9229-0","issn":"00074861","usgsCitation":"Selch, T., Hoagstrom, C., Weimer, E., Duehr, J., and Chipps, S., 2007, Influence of fluctuating water levels on mercury concentrations in adult walleye: Bulletin of Environmental Contamination and Toxicology, v. 79, no. 1, p. 36-40, https://doi.org/10.1007/s00128-007-9229-0.","startPage":"36","endPage":"40","numberOfPages":"5","costCenters":[],"links":[{"id":212916,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00128-007-9229-0"},{"id":240481,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"79","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-07-07","publicationStatus":"PW","scienceBaseUri":"505a3b37e4b0c8380cd62322","contributors":{"authors":[{"text":"Selch, T.M.","contributorId":34327,"corporation":false,"usgs":true,"family":"Selch","given":"T.M.","affiliations":[],"preferred":false,"id":424085,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hoagstrom, C.W.","contributorId":11400,"corporation":false,"usgs":true,"family":"Hoagstrom","given":"C.W.","affiliations":[],"preferred":false,"id":424084,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Weimer, E.J.","contributorId":58102,"corporation":false,"usgs":true,"family":"Weimer","given":"E.J.","affiliations":[],"preferred":false,"id":424087,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Duehr, J.P.","contributorId":86162,"corporation":false,"usgs":true,"family":"Duehr","given":"J.P.","email":"","affiliations":[],"preferred":false,"id":424088,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Chipps, S. R. 0000-0001-6511-7582","orcid":"https://orcid.org/0000-0001-6511-7582","contributorId":40369,"corporation":false,"usgs":true,"family":"Chipps","given":"S. R.","affiliations":[],"preferred":false,"id":424086,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70029740,"text":"70029740 - 2007 - Formation of mixed Al-Fe colloidal sorbent and dissolved-colloidal partitioning of Cu and Zn in the Cement Creek - Animas River Confluence, Silverton, Colorado","interactions":[],"lastModifiedDate":"2023-08-02T11:33:46.512511","indexId":"70029740","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":"Formation of mixed Al-Fe colloidal sorbent and dissolved-colloidal partitioning of Cu and Zn in the Cement Creek - Animas River Confluence, Silverton, Colorado","docAbstract":"Transport and chemical transformations of dissolved and colloidal Al, Fe, Cu and Zn were studied by detailed sampling in the mixing zone downstream from the confluence of Cement Creek (pH 4.1) with the Animas River (pH 7.6). Complete mixing resulted in circumneutral pH in the downstream reach of the 1300 m study area. All four metals were transported through this mixing zone without significant losses to the streambed, and they exhibited transformations from dissolved to colloidal forms to varying degrees during the mixing process. Nearly all of the Al formed colloidal hydrous Al oxides (HAO) as pH increased (4.8–6.5), whereas colloidal hydrous Fe oxides (HFO) were supplied by Cement Creek as well as formed in the mixing zone primarily at higher pH (>6.5). The short travel time through the mixing zone (approx. 40 min) and pH limited the formation of HFO from dissolved Fe2+ supplied by Cement Creek. Although the proportions of HAO and HFO varied as the streams mixed, the colloidal sorbent typically was enriched in HAO relative to HFO by a factor of 1.5–2.1 (by mole) in the pH range where dissolved-to-colloidal partitioning of Cu and Zn was observed. Model simulations of sorption by HFO (alone) greatly underestimated the dissolved-to-colloidal partitioning of Zn. Previous studies have shown that HAO–HFO mixtures can sorb greater amounts of Zn than HFO alone, but the high Zn-to-sorbent ratio in this mixing zone could also account for greater partitioning. In contrast to Zn, comparisons with model simulations did not show that Cu sorption was greater than that for HFO alone, and also indicated that sorption was possibly less than what would be expected for a non-interactive mixture of these two sorbents. These field results for Cu, however, might be influenced by (organic) complexation or other factors in this natural system. Laboratory mixing experiments using natural source waters (upstream of the confluence) showed that the presence of HFO in the mixed sorbent resulted in greater Cu partitioning than for HAO alone, and that the effect was greater with increasing (mole fraction) HFO. This was consistent with field results that showed greater Cu sorption when additional HFO was formed in the downstream reach of the mixing zone. Further research is needed to identify the significance of surface-related mechanisms specific to HAO–HFO mixtures that could affect the partitioning of Cu in natural systems.
We used Pacific Loon (Gavia pacifica) and Red-throated Loon (G. stellata) nests with known ages to gauge the efficacy of egg flotation for determining nest age in coastal Alaska. Egg flotation accurately estimated nest age for both species; the mean ± 1SD difference between known age and age determined with egg flotation was - 0.05 ± 2.00 d and -0.02 ± 1.63 d for Pacific and Red-throated Loons, respectively. Day of nest initiation did not influence the relationship between known nest age and nest age estimated with egg flotation, indicating incubation period was not shortened in nests initiated later in the season. Additionally, we found no difference in the ability of egg flotation to estimate nest age between two widely dispersed study sites for Pacific Loons, and only a small difference between two of three widely dispersed study sites for Red-throated Loons. Thus, our described relationships between egg flotation categories and nest age should be broadly applicable for these holarctic species. We conclude that for Pacific and Red-throated Loons, egg flotation is a useful technique for determining nest age in the field to better monitor nest fate, and to quantify nest age effects on nest daily survival rate.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Waterbirds","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1675/1524-4695(2007)30[207:EFENAF]2.0.CO;2","issn":"15244695","usgsCitation":"Rizzolo, D., and Schmutz, J.A., 2007, Egg flotation estimates nest age for Pacific and Red-throated Loons: Waterbirds, v. 30, no. 2, p. 207-213, https://doi.org/10.1675/1524-4695(2007)30[207:EFENAF]2.0.CO;2.","productDescription":"7 p.","startPage":"207","endPage":"213","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":240273,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212738,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1675/1524-4695(2007)30[207:EFENAF]2.0.CO;2"}],"volume":"30","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a086be4b0c8380cd51af7","contributors":{"authors":[{"text":"Rizzolo, Daniel drizzolo@usgs.gov","contributorId":5631,"corporation":false,"usgs":true,"family":"Rizzolo","given":"Daniel","email":"drizzolo@usgs.gov","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":424026,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schmutz, Joel A. 0000-0002-6516-0836 jschmutz@usgs.gov","orcid":"https://orcid.org/0000-0002-6516-0836","contributorId":1805,"corporation":false,"usgs":true,"family":"Schmutz","given":"Joel","email":"jschmutz@usgs.gov","middleInitial":"A.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":424027,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70029725,"text":"70029725 - 2007 - DOM in recharge waters of the Santa Ana River Basin","interactions":[],"lastModifiedDate":"2021-06-01T16:56:05.966436","indexId":"70029725","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2136,"text":"Journal - American Water Works Association","active":true,"publicationSubtype":{"id":10}},"title":"DOM in recharge waters of the Santa Ana River Basin","docAbstract":"Assessment of the composition, reactivity, and potential health effects of dissolved organic matter (DOM) is an important issue in the regulation and operation of groundwater recharge projects. The composition of DOM in various natural surface waters and reclaimed waters used to recharge the alluvial aquifers of the lower Santa Ana River Basin in California was derived primarily from terpenoid hydrocarbons and amino sugars. Lesser amounts of aromatic sulfonate and alkylphenol polyethoxylate metabolites of anionic and neutral surfactants were detected in reclaimed water, and these metabolites persisted in waters of the Santa Ana River, the Prado Wetland, and the recharge basins. Only small amounts of humic substances derived from tannins and lignins were deposited during storm flow periods in the Prado Wetland, but these amounts were responsible for significant increases in disinfection by-product formation potential in these waters. Colloids composed of bacterial cell wall fragments showed large percentage increases in all waters during storm flow periods.
","language":"English","publisher":"Wiley Online","doi":"10.1002/j.1551-8833.2007.tb07960.x","usgsCitation":"Leenheer, J., Aiken, G., Woodside, G., and O’Connor-Patel, K., 2007, DOM in recharge waters of the Santa Ana River Basin: Journal - American Water Works Association, v. 99, no. 6, p. 118-131, https://doi.org/10.1002/j.1551-8833.2007.tb07960.x.","productDescription":"14 p.","startPage":"118","endPage":"131","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":240271,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Santa Ana River Basin","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -117.828369140625,\n 33.71977077483141\n ],\n [\n -116.85607910156249,\n 33.71977077483141\n ],\n [\n -116.85607910156249,\n 34.14363482031264\n ],\n [\n -117.828369140625,\n 34.14363482031264\n ],\n [\n -117.828369140625,\n 33.71977077483141\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"99","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fd51e4b0c8380cd4e787","contributors":{"authors":[{"text":"Leenheer, J.A.","contributorId":75123,"corporation":false,"usgs":true,"family":"Leenheer","given":"J.A.","affiliations":[],"preferred":false,"id":424021,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Aiken, G. R. 0000-0001-8454-0984","orcid":"https://orcid.org/0000-0001-8454-0984","contributorId":14452,"corporation":false,"usgs":true,"family":"Aiken","given":"G. R.","affiliations":[],"preferred":false,"id":424020,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Woodside, G.","contributorId":83406,"corporation":false,"usgs":true,"family":"Woodside","given":"G.","email":"","affiliations":[],"preferred":false,"id":424022,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"O’Connor-Patel, K.","contributorId":97391,"corporation":false,"usgs":true,"family":"O’Connor-Patel","given":"K.","email":"","affiliations":[],"preferred":false,"id":424023,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70029724,"text":"70029724 - 2007 - Genetic diversity of infectious hematopoietic necrosis virus from Feather River and Lake Oroville, California, and virulence of selected isolates for Chinook salmon and rainbow trout","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029724","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2177,"text":"Journal of Aquatic Animal Health","active":true,"publicationSubtype":{"id":10}},"title":"Genetic diversity of infectious hematopoietic necrosis virus from Feather River and Lake Oroville, California, and virulence of selected isolates for Chinook salmon and rainbow trout","docAbstract":"Infectious hematopoietic necrosis virus (IHNV) is a significant pathogen of young salmonid fishes worldwide but particularly within the historical range of the Pacific Northwest and California. In the Sacramento and San Joaquin River drainages of California, IHNV outbreaks in juvenile Chinook salmon Oncorhynchus tshawytscha have been observed regularly at large production hatcheries, including Coleman National Fish Hatchery (established in 1941) and Feather River State Fish Hatchery (FRH; established in 1967), since facility operations began. Recent severe epidemics at the FRH in 1998 and 2000-2002 prompted investigations into the characteristics and potential sources of virus at this facility. Both phylogenetic analyses of a variable portion of the glycoprotein gene and serologic comparisons based on neutralization with three polyclonal rabbit sera were used to characterize 82 IHNV isolates from the Feather River watershed between 1969 and 2004. All isolates examined were in the L genogroup and belonged to one of three serologic groups typical of IHNV from California. The IHNV isolates from the Feather River area demonstrated a maximum nucleotide sequence divergence of 4.0%, and new isolates appeared to emerge from previous isolates rather than by the introduction of more diverse subgroups from exogenous sources. The earliest isolates examined from the watershed formed the subgroup LI, which disappeared coincidently with a temporal shift to new genetic and serologic types of the larger subgroup LII. Experimental challenges demonstrated no significant differences in the virulence for juvenile Chinook salmon and rainbow trout O. mykiss from selected isolates representing the principal types of IHNV found historically and from recent epidemics at FRH. While most isolates were equally virulent for both host species, one isolate was found to be more virulent for Chinook salmon than for rainbow trout. ?? Copyright by the American Fisheries Society 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Aquatic Animal Health","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/H07-003.1","issn":"08997659","usgsCitation":"Bendorf, C., Kelley, G., Yun, S., Kurath, G., Andree, K., and Hedrick, R., 2007, Genetic diversity of infectious hematopoietic necrosis virus from Feather River and Lake Oroville, California, and virulence of selected isolates for Chinook salmon and rainbow trout: Journal of Aquatic Animal Health, v. 19, no. 4, p. 254-269, https://doi.org/10.1577/H07-003.1.","startPage":"254","endPage":"269","numberOfPages":"16","costCenters":[],"links":[{"id":212709,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/H07-003.1"},{"id":240236,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"19","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-12-01","publicationStatus":"PW","scienceBaseUri":"505a1574e4b0c8380cd54e0b","contributors":{"authors":[{"text":"Bendorf, C.M.","contributorId":41215,"corporation":false,"usgs":true,"family":"Bendorf","given":"C.M.","affiliations":[],"preferred":false,"id":424014,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kelley, G.O.","contributorId":47156,"corporation":false,"usgs":true,"family":"Kelley","given":"G.O.","email":"","affiliations":[],"preferred":false,"id":424015,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Yun, S.C.","contributorId":69778,"corporation":false,"usgs":true,"family":"Yun","given":"S.C.","email":"","affiliations":[],"preferred":false,"id":424017,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kurath, Gael 0000-0003-3294-560X gkurath@usgs.gov","orcid":"https://orcid.org/0000-0003-3294-560X","contributorId":100522,"corporation":false,"usgs":true,"family":"Kurath","given":"Gael","email":"gkurath@usgs.gov","affiliations":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"preferred":true,"id":424019,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Andree, K.B.","contributorId":48759,"corporation":false,"usgs":true,"family":"Andree","given":"K.B.","email":"","affiliations":[],"preferred":false,"id":424016,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hedrick, R.P.","contributorId":76431,"corporation":false,"usgs":true,"family":"Hedrick","given":"R.P.","email":"","affiliations":[],"preferred":false,"id":424018,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70029723,"text":"70029723 - 2007 - Flux and age of dissolved organic carbon exported to the Arctic Ocean: A carbon isotopic study of the five largest arctic rivers","interactions":[],"lastModifiedDate":"2018-01-31T10:46:19","indexId":"70029723","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1836,"text":"Global Biogeochemical Cycles","active":true,"publicationSubtype":{"id":10}},"title":"Flux and age of dissolved organic carbon exported to the Arctic Ocean: A carbon isotopic study of the five largest arctic rivers","docAbstract":"The export and Δ14C-age of dissolved organic carbon (DOC) was determined for the Yenisey, Lena, Ob', Mackenzie, and Yukon rivers for 2004–2005. Concentrations of DOC elevate significantly with increasing discharge in these rivers, causing approximately 60% of the annual export to occur during a 2-month period following spring ice breakup. We present a total annual flux from the five rivers of ∼16 teragrams (Tg), and conservatively estimate that the total input of DOC to the Arctic Ocean is 25–36 Tg, which is ∼5–20% greater than previous fluxes. These fluxes are also ∼2.5× greater than temperate rivers with similar watershed sizes and water discharge. Δ14C-DOC shows a clear relationship with hydrology. A small pool of DOC slightly depleted in Δ14C is exported with base flow. The large pool exported with spring thaw is enriched in Δ14C with respect to current-day atmospheric Δ14C-CO2 values. A simple model predicts that ∼50% of DOC exported during the arctic spring thaw is 1–5 years old, ∼25% is 6–10 years in age, and 15% is 11–20 years old. The dominant spring melt period, a historically undersampled period, exports a large amount of young and presumably semilabile DOC to the Arctic Ocean.
","language":"English","publisher":"AGU","doi":"10.1029/2007GB002934","issn":"08866236","usgsCitation":"Raymond, P., McClelland, J., Holmes, R., Zhulidov, A., Mull, K., Peterson, B.J., Striegl, R.G., Aiken, G., and Gurtovaya, T., 2007, Flux and age of dissolved organic carbon exported to the Arctic Ocean: A carbon isotopic study of the five largest arctic rivers: Global Biogeochemical Cycles, v. 21, no. 4, https://doi.org/10.1029/2007GB002934.","costCenters":[],"links":[{"id":240235,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212708,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007GB002934"}],"volume":"21","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-11-02","publicationStatus":"PW","scienceBaseUri":"505a12a7e4b0c8380cd543b0","contributors":{"authors":[{"text":"Raymond, P.A.","contributorId":62013,"corporation":false,"usgs":true,"family":"Raymond","given":"P.A.","affiliations":[],"preferred":false,"id":424010,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McClelland, J.W.","contributorId":62015,"corporation":false,"usgs":true,"family":"McClelland","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":424011,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Holmes, R.M.","contributorId":66485,"corporation":false,"usgs":true,"family":"Holmes","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":424012,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Zhulidov, A.V.","contributorId":60020,"corporation":false,"usgs":true,"family":"Zhulidov","given":"A.V.","email":"","affiliations":[],"preferred":false,"id":424009,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mull, K.","contributorId":17045,"corporation":false,"usgs":true,"family":"Mull","given":"K.","email":"","affiliations":[],"preferred":false,"id":424006,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Peterson, B. J.","contributorId":53749,"corporation":false,"usgs":false,"family":"Peterson","given":"B.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":424008,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Striegl, Robert G. 0000-0002-8251-4659 rstriegl@usgs.gov","orcid":"https://orcid.org/0000-0002-8251-4659","contributorId":1630,"corporation":false,"usgs":true,"family":"Striegl","given":"Robert","email":"rstriegl@usgs.gov","middleInitial":"G.","affiliations":[{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":false,"id":424013,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Aiken, G. R. 0000-0001-8454-0984","orcid":"https://orcid.org/0000-0001-8454-0984","contributorId":14452,"corporation":false,"usgs":true,"family":"Aiken","given":"G. R.","affiliations":[],"preferred":false,"id":424005,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Gurtovaya, T.Y.","contributorId":53604,"corporation":false,"usgs":true,"family":"Gurtovaya","given":"T.Y.","email":"","affiliations":[],"preferred":false,"id":424007,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}} ,{"id":70029720,"text":"70029720 - 2007 - Modern benthic ostracodes from Lutzow-Holm Bay, East Antarctica: paleoceanographic, paleobiogeographic, and evolutionary significance","interactions":[],"lastModifiedDate":"2015-04-06T10:52:22","indexId":"70029720","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2735,"text":"Micropaleontology","active":true,"publicationSubtype":{"id":10}},"title":"Modern benthic ostracodes from Lutzow-Holm Bay, East Antarctica: paleoceanographic, paleobiogeographic, and evolutionary significance","docAbstract":"Seventy-three ostracode species from 38 genera were recovered from the 55 surface sediment samples in Lützow-Holm Bay, northeastern Antarctica. We investigated bathymetric and geographic distributions of modern benthic ostracode species in the bay and compared this fauna with published modern and fossil ostracode data of Antarctic and southern South American regions. The results show: (1) Four biotopes and three sub-biotopes are recognized based on Q-mode cluster analysis, which suggest distributions of modern ostracodes are mainly controlled by water-mass structure, ice scouring, and light availability. (2) Comparison between the Lützow-Holm Bay fauna and other ostracode faunas from Antarctica and southern South America shows high endemism and homogeneity of Antarctic ostracode fauna, suggesting in situ evolution of most extant Antarctic species. (3) Most species are endemic to the Antarctica, a few species also inhabit South American waters.
","language":"English","publisher":"Micropaleontology Project","doi":"10.2113/gsmicropal.53.6.469","issn":"00262803","usgsCitation":"Yasuhara, M., Kato, M., Ikeya, N., and Seto, K., 2007, Modern benthic ostracodes from Lutzow-Holm Bay, East Antarctica: paleoceanographic, paleobiogeographic, and evolutionary significance: Micropaleontology, v. 53, no. 6, p. 469-496, https://doi.org/10.2113/gsmicropal.53.6.469.","productDescription":"28 p.","startPage":"469","endPage":"496","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":240169,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":268483,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gsmicropal.53.6.469"}],"otherGeospatial":"Lutzow-Holm Bay, Antarctica","volume":"53","issue":"6","noUsgsAuthors":false,"publicationDate":"2009-08-10","publicationStatus":"PW","scienceBaseUri":"505a5c91e4b0c8380cd6fdb2","contributors":{"authors":[{"text":"Yasuhara, Moriaki","contributorId":37935,"corporation":false,"usgs":true,"family":"Yasuhara","given":"Moriaki","affiliations":[],"preferred":false,"id":423994,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kato, Masako","contributorId":25105,"corporation":false,"usgs":false,"family":"Kato","given":"Masako","email":"","affiliations":[],"preferred":false,"id":423993,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ikeya, Noriyuki","contributorId":101026,"corporation":false,"usgs":true,"family":"Ikeya","given":"Noriyuki","email":"","affiliations":[],"preferred":false,"id":423996,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Seto, Koji","contributorId":93689,"corporation":false,"usgs":true,"family":"Seto","given":"Koji","email":"","affiliations":[],"preferred":false,"id":423995,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70029717,"text":"70029717 - 2007 - Latin hypercube approach to estimate uncertainty in ground water vulnerability","interactions":[],"lastModifiedDate":"2012-03-12T17:21:39","indexId":"70029717","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Latin hypercube approach to estimate uncertainty in ground water vulnerability","docAbstract":"A methodology is proposed to quantify prediction uncertainty associated with ground water vulnerability models that were developed through an approach that coupled multivariate logistic regression with a geographic information system (GIS). This method uses Latin hypercube sampling (LHS) to illustrate the propagation of input error and estimate uncertainty associated with the logistic regression predictions of ground water vulnerability. Central to the proposed method is the assumption that prediction uncertainty in ground water vulnerability models is a function of input error propagation from uncertainty in the estimated logistic regression model coefficients (model error) and the values of explanatory variables represented in the GIS (data error). Input probability distributions that represent both model and data error sources of uncertainty were simultaneously sampled using a Latin hypercube approach with logistic regression calculations of probability of elevated nonpoint source contaminants in ground water. The resulting probability distribution represents the prediction intervals and associated uncertainty of the ground water vulnerability predictions. The method is illustrated through a ground water vulnerability assessment of the High Plains regional aquifer. Results of the LHS simulations reveal significant prediction uncertainties that vary spatially across the regional aquifer. Additionally, the proposed method enables a spatial deconstruction of the prediction uncertainty that can lead to improved prediction of ground water vulnerability. ?? 2007 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2006.00298.x","issn":"0017467X","usgsCitation":"Gurdak, J., McCray, J., Thyne, G., and Qi, S., 2007, Latin hypercube approach to estimate uncertainty in ground water vulnerability: Ground Water, v. 45, no. 3, p. 348-361, https://doi.org/10.1111/j.1745-6584.2006.00298.x.","startPage":"348","endPage":"361","numberOfPages":"14","costCenters":[],"links":[{"id":213084,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2006.00298.x"},{"id":240673,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-03-20","publicationStatus":"PW","scienceBaseUri":"505a4580e4b0c8380cd6738a","contributors":{"authors":[{"text":"Gurdak, J.J.","contributorId":35119,"corporation":false,"usgs":true,"family":"Gurdak","given":"J.J.","email":"","affiliations":[],"preferred":false,"id":423983,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McCray, J.E.","contributorId":31985,"corporation":false,"usgs":true,"family":"McCray","given":"J.E.","affiliations":[],"preferred":false,"id":423982,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Thyne, G.","contributorId":20983,"corporation":false,"usgs":true,"family":"Thyne","given":"G.","affiliations":[],"preferred":false,"id":423981,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Qi, S.L.","contributorId":76140,"corporation":false,"usgs":true,"family":"Qi","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":423984,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70029715,"text":"70029715 - 2007 - A method for improving predictions of bed-load discharges to reservoirs","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70029715","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2594,"text":"Lakes and Reservoirs: Research and Management","active":true,"publicationSubtype":{"id":10}},"title":"A method for improving predictions of bed-load discharges to reservoirs","docAbstract":"Effective management options for mitigating the loss of reservoir water storage capacity to sedimentation depend on improved predictions of bed-load discharges into the reservoirs. Most predictions of bed-load discharges, however, are based on the assumption that the rates of bed-load sediment availability equal the transport capacity of the flow, ignoring the spatio-temporal variability of the sediment supply. This paper develops a semiquantitative method to characterize bed-load sediment transport in alluvial channels, assuming a channel reach is non-supply limited when the bed-load discharge of a given sediment particle-size class is functionally related to the energy that is available to transport that fraction of the total bed-load. The method was applied to 22 alluvial stream channels in the USA to determine whether a channel reach had a supply-limited or non-supply-limited bed-load transport regime. The non-supply-limited transport regime was further subdivided into two groups on the basis of statistical tests. The results indicated the pattern of bed-load sediment transport in alluvial channels depends on the complete spectrum of sediment particle sizes available for transport rather than individual particle-size fractions represented by one characteristic particle size. The application of the method developed in this paper should assist reservoir managers in selecting bed-load sediment transport equations to improve predictions of bed-load discharge in alluvial streams, thereby significantly increasing the efficiency of management options for maintaining the storage capacity of waterbodies. ?? 2007 Blackwell Publishing Asia Pty Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Lakes and Reservoirs: Research and Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1440-1770.2007.00324.x","issn":"13205331","usgsCitation":"Lopes, V., Osterkamp, W.R., and Bravo-Espinosa, M., 2007, A method for improving predictions of bed-load discharges to reservoirs: Lakes and Reservoirs: Research and Management, v. 12, no. 2, p. 59-72, https://doi.org/10.1111/j.1440-1770.2007.00324.x.","startPage":"59","endPage":"72","numberOfPages":"14","costCenters":[],"links":[{"id":213058,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1440-1770.2007.00324.x"},{"id":240642,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"12","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-07-04","publicationStatus":"PW","scienceBaseUri":"5059e453e4b0c8380cd465a7","contributors":{"authors":[{"text":"Lopes, V.L.","contributorId":84963,"corporation":false,"usgs":true,"family":"Lopes","given":"V.L.","email":"","affiliations":[],"preferred":false,"id":423976,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Osterkamp, W. R.","contributorId":46044,"corporation":false,"usgs":true,"family":"Osterkamp","given":"W.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":423975,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bravo-Espinosa, M.","contributorId":31561,"corporation":false,"usgs":true,"family":"Bravo-Espinosa","given":"M.","email":"","affiliations":[],"preferred":false,"id":423974,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70029712,"text":"70029712 - 2007 - Nitrate dynamics within the Pajaro River, a nutrient-rich, losing stream","interactions":[],"lastModifiedDate":"2023-08-09T11:21:29.048891","indexId":"70029712","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":"Nitrate dynamics within the Pajaro River, a nutrient-rich, losing stream","docAbstract":"The major ion chemistry of water from an 11.42-km reach of the Pajaro River, a losing stream in central coastal California, shows a consistent pattern of higher concentrations during the 2nd (dry) half of the water year. Most solutes are conserved during flow along the reach, but [NO3−] decreases by ~30% and is accompanied by net loss of channel discharge and extensive surface–subsurface exchange. The corresponding net NO3− uptake length is 37 ± 13 km (42 ± 12 km when normalized to the conservative solute Cl−), and the areal NO3− uptake rate is 0.5 μmol m−2 s−1. The observed reduction in [NO3−] along the reach results from one or more internal sinks, not dilution by ground water, hill-slope water, or other water inputs. Observed reductions in [NO3−] and channel discharge along the experimental reach result in a net loss of 200–400 kg/d of NO3−-N, ~50% of the input load. High-resolution (temporal and spatial) sampling indicates that most of the NO3− loss occurs along the lower part of the reach, where there is the greatest seepage loss and surface–subsurface exchange of water. Stable isotopes of NO3−, total dissolved P concentrations, and streambed chemical profiles suggest that denitrification is the most significant NO3− sink along the reach. Denitrification efficiency, as expressed through downstream enrichment in 15N-NO3−, varies considerably during the water year. When discharge is greater (typically earlier in the water year), denitrification is least efficient and downstream enrichment in 15N-NO3− is greatest. When discharge is lower, denitrification in the streambed appears to occur with greater efficiency, resulting in lower downstream enrichment in 15N-NO3−.
","language":"English","publisher":"University of Chicago Press","doi":"10.1899/0887-3593(2007)26[191:NDWTPR]2.0.CO;2","issn":"08873593","usgsCitation":"Ruehl, C., Fisher, A., Los, H.M., Wankel, S.D., Wheat, C., Kendall, C., Hatch, C., and Shennan, C., 2007, Nitrate dynamics within the Pajaro River, a nutrient-rich, losing stream: Journal of the North American Benthological Society, v. 26, no. 2, p. 191-206, https://doi.org/10.1899/0887-3593(2007)26[191:NDWTPR]2.0.CO;2.","productDescription":"16 p.","startPage":"191","endPage":"206","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240609,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Pajaro River","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -122.98626284071494,\n 37.37078225360888\n ],\n [\n -122.98626284071494,\n 35.694360455569424\n ],\n [\n -119.69177791118913,\n 35.694360455569424\n ],\n [\n -119.69177791118913,\n 37.37078225360888\n ],\n [\n -122.98626284071494,\n 37.37078225360888\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"26","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a669ee4b0c8380cd72ea2","contributors":{"authors":[{"text":"Ruehl, C.R.","contributorId":30826,"corporation":false,"usgs":true,"family":"Ruehl","given":"C.R.","affiliations":[],"preferred":false,"id":423964,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fisher, A.T.","contributorId":51528,"corporation":false,"usgs":true,"family":"Fisher","given":"A.T.","email":"","affiliations":[],"preferred":false,"id":423966,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Los, Huertos M.","contributorId":92872,"corporation":false,"usgs":true,"family":"Los","given":"Huertos","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":423969,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wankel, Scott D.","contributorId":98076,"corporation":false,"usgs":true,"family":"Wankel","given":"Scott","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":423970,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Wheat, C.G.","contributorId":59249,"corporation":false,"usgs":true,"family":"Wheat","given":"C.G.","email":"","affiliations":[],"preferred":false,"id":423967,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Kendall, Carol 0000-0002-0247-3405 ckendall@usgs.gov","orcid":"https://orcid.org/0000-0002-0247-3405","contributorId":1462,"corporation":false,"usgs":true,"family":"Kendall","given":"Carol","email":"ckendall@usgs.gov","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":423965,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Hatch, C.E.","contributorId":11402,"corporation":false,"usgs":true,"family":"Hatch","given":"C.E.","email":"","affiliations":[],"preferred":false,"id":423963,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Shennan, C.","contributorId":65671,"corporation":false,"usgs":true,"family":"Shennan","given":"C.","email":"","affiliations":[],"preferred":false,"id":423968,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70029710,"text":"70029710 - 2007 - Evidence for terrigenic SF6 in groundwater from basaltic aquifers, Jeju Island, Korea: Implications for groundwater dating","interactions":[],"lastModifiedDate":"2018-10-16T09:55:18","indexId":"70029710","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":"Evidence for terrigenic SF6 in groundwater from basaltic aquifers, Jeju Island, Korea: Implications for groundwater dating","docAbstract":"Measurements of the concentrations of dichlorodifluoromethane (CFC-12), tritium (3H), and sulfur hexafluoride (SF6) in groundwater from basaltic aquifers in Jeju Island, Korea, demonstrate a terrigenic source of SF6. Using a lumped-parameter dispersion model, groundwater was identified as young water (<15 years), old water with negligible CFC-12 and 3H, and binary mixtures of the two. Model calculations using dispersion models and binary mixing based on 3H and CFC-12 concentrations demonstrate a non-atmospheric excess of SF6 relative to CFC-12 and 3H concentrations for more than half of the samples. The non-atmospheric excess SF6 may have originated from terrigenic sources in relict volcanic fluids, which could have acquired SF6 from granites and basement rocks of the island during volcanic activity. Local excess anthropogenic sources of SF6 are unlikely. The SF6 age is biased young relative to the CFC-12 age, typically up to 20 years and as high as 30 years. This age bias is more pronounced in samples of groundwater older than 15 years. The presence of terrigenic SF6 can affect the entire dating range for groundwater in mixtures that contain a fraction of old water.
","language":"English","publisher":"Elsevier","doi":"10.1016/j.jhydrol.2007.03.011","issn":"00221694","usgsCitation":"Koh, D., Plummer, N., Busenberg, E., and Kim, Y., 2007, Evidence for terrigenic SF6 in groundwater from basaltic aquifers, Jeju Island, Korea: Implications for groundwater dating: Journal of Hydrology, v. 339, no. 1-2, p. 93-104, https://doi.org/10.1016/j.jhydrol.2007.03.011.","productDescription":"12 p.","startPage":"93","endPage":"104","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240576,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212998,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2007.03.011"}],"country":"South Korea","otherGeospatial":"Jeju Island","volume":"339","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d54e4b0c8380cd52f5b","contributors":{"authors":[{"text":"Koh, Dong-Chan","contributorId":167733,"corporation":false,"usgs":false,"family":"Koh","given":"Dong-Chan","email":"","affiliations":[{"id":24820,"text":"Korea Institute of Geoscience and Mineral Resources","active":true,"usgs":false}],"preferred":false,"id":423955,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Plummer, Niel 0000-0002-4020-1013 nplummer@usgs.gov","orcid":"https://orcid.org/0000-0002-4020-1013","contributorId":190100,"corporation":false,"usgs":true,"family":"Plummer","given":"Niel","email":"nplummer@usgs.gov","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":423954,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Busenberg, Eurybiades ebusenbe@usgs.gov","contributorId":2271,"corporation":false,"usgs":true,"family":"Busenberg","given":"Eurybiades","email":"ebusenbe@usgs.gov","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":423953,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kim, Yongje","contributorId":203716,"corporation":false,"usgs":false,"family":"Kim","given":"Yongje","email":"","affiliations":[],"preferred":false,"id":423952,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70029708,"text":"70029708 - 2007 - Occurrence and genetic typing of infectious hematopoietic necrosis virus in Kamchatka, Russia","interactions":[],"lastModifiedDate":"2021-05-21T18:10:03.80378","indexId":"70029708","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1396,"text":"Diseases of Aquatic Organisms","active":true,"publicationSubtype":{"id":10}},"title":"Occurrence and genetic typing of infectious hematopoietic necrosis virus in Kamchatka, Russia","docAbstract":"Infectious hematopoietic necrosis virus (IHNV) is a well known rhabdoviral pathogen of salmonid fish in North America that has become established in Asia and Europe. On the Pacific coast of Russia, IHNV was first detected in hatchery sockeye from the Kamchatka Peninsula in 2001. Results of virological examinations of over 10 000 wild and cultured salmonid fish from Kamchatka during 1996 to 2005 revealed IHNV in several sockeye salmon Oncorhynchus nerka populations. The virus was isolated from spawning adults and from juveniles undergoing epidemics in both hatchery and wild sockeye populations from the Bolshaya watershed. No virus was detected in 2 other water-sheds, or in species other than sockeye salmon. Genetic typing of 8 virus isolates by seguence analysis of partial glycoprotein and nucleocapsid genes revealed that they were genetically homogeneous and fell within the U genogroup of IHNV. In phylogenetic analyses, the Russian IHNV sequences were indistinguishable from the sequences of North American U genogroup isolates that occur throughout Alaska, British Columbia, Washington, and Oregon. The high similarity, and in some cases identity, between Russian and North American IHNV isolates suggests virus transmission or exposure to a common viral reservoir in the North Pacific Ocean. Inter-Research 2007.
","language":"English","publisher":"Inter-Research","doi":"10.3354/dao075001","usgsCitation":"Rudakova, S., Kurath, G., and Bochkova, E., 2007, Occurrence and genetic typing of infectious hematopoietic necrosis virus in Kamchatka, Russia: Diseases of Aquatic Organisms, v. 75, no. 1, p. 1-11, https://doi.org/10.3354/dao075001.","productDescription":"12 p.","startPage":"1","endPage":"11","costCenters":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"links":[{"id":477088,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3354/dao075001","text":"Publisher Index Page"},{"id":240544,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Russia","otherGeospatial":"Kamchatka","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n 158.02734375,\n 49.61070993807422\n ],\n [\n 164.8828125,\n 49.61070993807422\n ],\n [\n 164.8828125,\n 62.67414334669093\n ],\n [\n 158.02734375,\n 62.67414334669093\n ],\n [\n 158.02734375,\n 49.61070993807422\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"75","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6b6ae4b0c8380cd7469a","contributors":{"authors":[{"text":"Rudakova, S.L.","contributorId":101087,"corporation":false,"usgs":true,"family":"Rudakova","given":"S.L.","affiliations":[],"preferred":false,"id":423944,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kurath, Gael 0000-0003-3294-560X gkurath@usgs.gov","orcid":"https://orcid.org/0000-0003-3294-560X","contributorId":100522,"corporation":false,"usgs":true,"family":"Kurath","given":"Gael","email":"gkurath@usgs.gov","affiliations":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"preferred":true,"id":423943,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bochkova, E.V.","contributorId":63626,"corporation":false,"usgs":true,"family":"Bochkova","given":"E.V.","email":"","affiliations":[],"preferred":false,"id":423942,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70029706,"text":"70029706 - 2007 - Isotopic characterization of three groundwater recharge sources and inferences for selected aquifers in the upper Klamath Basin of Oregon and California, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70029706","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":"Isotopic characterization of three groundwater recharge sources and inferences for selected aquifers in the upper Klamath Basin of Oregon and California, USA","docAbstract":"Stable isotope (??D and ??18O) signatures of three principal groundwater recharge areas in the 21,000-km2 upper Klamath Basin are used to infer recharge sources for aquifers in the interior parts of the basin. Two of the principal recharge areas, the Cascade Range on the western and southern margin of the basin and uplands along the eastern margin, are defined by mean annual precipitation that exceeds approximately 60 cm. A third recharge area coincides with the extensive irrigation canal system in the south central part of the basin. The stable isotope signature for Cascade Range groundwater falls near the global meteoric water line (GMWL). The stable isotope signature for the groundwater of the eastern basin uplands also falls near the GMWL, but is depleted in heavy isotopes relative to the Cascade Range groundwater. The stable isotope signature for water from the irrigation canal system deviates from the GMWL in a manner indicative of fractionation by evaporation. Groundwater provenance was previously unknown for two aquifers of interest: that supplying deep (225-792 m), large-capacity irrigation wells along the Oregon-California border, and that of the geothermal system near Klamath Falls. Groundwater produced by the deep irrigation wells along the Oregon-California border appears to be a mixture of eastern-basin groundwater and water with an evaporative isotopic signature. The component with an evaporative isotopic signature appears in some places to consist of infiltrated irrigation water. Chloride data suggest that much of the component with the evaporative isotopic signature may be coming from an adjacent subbasin. After accounting for the 18O shift common in geothermal waters, isotope data suggest that the geothermal groundwater in the upper Klamath Basin may emanate from the eastern basin uplands. Findings demonstrate that stable isotope and chloride data can illuminate certain details of a regional groundwater flow system in a complex geologic setting where other hydrologic data are ambiguous. ?? 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.2006.12.008","issn":"00221694","usgsCitation":"Palmer, P., Gannett, M.W., and Hinkle, S., 2007, Isotopic characterization of three groundwater recharge sources and inferences for selected aquifers in the upper Klamath Basin of Oregon and California, USA: Journal of Hydrology, v. 336, no. 1-2, p. 17-29, https://doi.org/10.1016/j.jhydrol.2006.12.008.","startPage":"17","endPage":"29","numberOfPages":"13","costCenters":[],"links":[{"id":212943,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2006.12.008"},{"id":240512,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"336","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3f9be4b0c8380cd64661","contributors":{"authors":[{"text":"Palmer, P.C.","contributorId":86972,"corporation":false,"usgs":true,"family":"Palmer","given":"P.C.","email":"","affiliations":[],"preferred":false,"id":423937,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gannett, M. W.","contributorId":75569,"corporation":false,"usgs":true,"family":"Gannett","given":"M.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":423936,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hinkle, S.R.","contributorId":74778,"corporation":false,"usgs":true,"family":"Hinkle","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":423935,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70029705,"text":"70029705 - 2007 - Recent climate trends and implications for water resources in the Catskill Mountain region, New York, USA","interactions":[],"lastModifiedDate":"2016-08-17T11:54:12","indexId":"70029705","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":"Recent climate trends and implications for water resources in the Catskill Mountain region, New York, USA","docAbstract":"Climate scientists have concluded that the earth’s surface air temperature warmed by 0.6 °C during the 20th century, and that warming induced by increasing concentrations of greenhouse gases is likely to continue in the 21st century, accompanied by changes in the hydrologic cycle. Climate change has important implications in the Catskill region of southeastern New York State, because the region is a source of water supply for New York City. We used the non-parametric Mann–Kendall test to evaluate annual, monthly, and multi-month trends in air temperature, precipitation amount, stream runoff, and potential evapotranspiration (PET) in the region during 1952–2005 based on data from 9 temperature sites, 12 precipitation sites, and 8 stream gages. A general pattern of warming temperatures and increased precipitation, runoff, and PET is evident in the region. Regional annual mean air temperature increased significantly by 0.6 °C per 50 years during the period; the greatest increases and largest number of significant upward trends were in daily minimum air temperature. Daily maximum air temperature showed the greatest increase during February through April, whereas minimum air temperature showed the greatest increase during May through September. Regional mean precipitation increased significantly by 136 mm per 50 years, nearly double that of the regional mean increase in runoff, which was not significant. Regional mean PET increased significantly by 19 mm per 50 years, about one-seventh that of the increase in precipitation amount, and broadly consistent with increased runoff during 1952–2005, despite the lack of significance in the mean regional runoff trend. Peak snowmelt as approximated by the winter–spring center of volume of stream runoff generally shifted from early April at the beginning of the record to late March at the end of the record, consistent with a decreasing trend in April runoff and an increasing trend in maximum March air temperature. This change indicates an increased supply of water to reservoirs earlier in the year. Additionally, the supply of water to reservoirs at the beginning of winter is greater as indicated by the timing of the greatest increases in precipitation and runoff—both occurred during summer and fall. The future balance between changes in air temperature and changes in the timing and amount of precipitation in the region will have important implications for the available water supply in the region.
","language":"English","publisher":"Elsevier","doi":"10.1016/j.jhydrol.2006.12.019","issn":"00221694","usgsCitation":"Burns, D.A., Klaus, J., and McHale, M.R., 2007, Recent climate trends and implications for water resources in the Catskill Mountain region, New York, USA: Journal of Hydrology, v. 336, no. 1-2, p. 155-170, https://doi.org/10.1016/j.jhydrol.2006.12.019.","productDescription":"16 p.","startPage":"155","endPage":"170","numberOfPages":"16","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":240479,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"New York","otherGeospatial":"Catskill region","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -75.3607177734375,\n 42.004407212963585\n ],\n [\n -75.3277587890625,\n 41.96357478222518\n ],\n [\n -75.26184082031249,\n 41.93088998442502\n ],\n [\n -75.2508544921875,\n 41.87774145109676\n ],\n [\n -75.1959228515625,\n 41.85319643776675\n ],\n [\n -75.157470703125,\n 41.84501267270692\n ],\n [\n -75.1080322265625,\n 41.832735062152615\n ],\n [\n -75.1025390625,\n 41.78769700539063\n ],\n [\n -75.047607421875,\n 41.73852846935917\n ],\n [\n -75.05859375,\n 41.66060124302088\n ],\n [\n -75.05859375,\n 41.60722821271717\n ],\n [\n -75.03662109375,\n 41.549700145132725\n ],\n [\n -74.9871826171875,\n 41.492120839687786\n ],\n [\n -74.937744140625,\n 41.47154438707647\n ],\n [\n -74.8883056640625,\n 41.45507852101139\n ],\n [\n -74.8388671875,\n 41.430371882652814\n ],\n [\n -74.77294921875,\n 41.42625319507272\n ],\n [\n -74.7344970703125,\n 41.413895564677304\n ],\n [\n -74.7015380859375,\n 41.372686481864655\n ],\n [\n -74.68505859374999,\n 41.35207214451295\n ],\n [\n -74.50927734375,\n 41.281934557995356\n ],\n [\n -74.3719482421875,\n 41.33970040774419\n ],\n [\n -74.102783203125,\n 41.430371882652814\n ],\n [\n -73.85009765625,\n 41.51680395810118\n ],\n [\n -73.7841796875,\n 41.590796851056005\n ],\n [\n -73.7017822265625,\n 41.70982942509964\n ],\n [\n -73.6468505859375,\n 41.83682786072714\n ],\n [\n -73.6138916015625,\n 42.04521345501039\n ],\n [\n -73.6688232421875,\n 42.313877566161864\n ],\n [\n -73.707275390625,\n 42.45588764197166\n ],\n [\n -73.7841796875,\n 42.742978093466434\n ],\n [\n -73.8885498046875,\n 42.867912483915305\n ],\n [\n -74.1522216796875,\n 42.93631775765237\n ],\n [\n -74.498291015625,\n 42.93631775765237\n ],\n [\n -74.86083984375,\n 42.93631775765237\n ],\n [\n -75.1409912109375,\n 42.81555136172695\n ],\n [\n -75.25634765625,\n 42.68243539838623\n ],\n [\n -75.35522460937499,\n 42.459940352216556\n ],\n [\n -75.3607177734375,\n 42.004407212963585\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"336","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a95f0e4b0c8380cd81d0b","contributors":{"authors":[{"text":"Burns, Douglas A. 0000-0001-6516-2869","orcid":"https://orcid.org/0000-0001-6516-2869","contributorId":29450,"corporation":false,"usgs":true,"family":"Burns","given":"Douglas","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":423932,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Klaus, Julian","contributorId":173770,"corporation":false,"usgs":false,"family":"Klaus","given":"Julian","email":"","affiliations":[{"id":7107,"text":"Univ. of Freiburg, Germany","active":true,"usgs":false}],"preferred":false,"id":423934,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McHale, Michael R. 0000-0003-3780-1816 mmchale@usgs.gov","orcid":"https://orcid.org/0000-0003-3780-1816","contributorId":1735,"corporation":false,"usgs":true,"family":"McHale","given":"Michael","email":"mmchale@usgs.gov","middleInitial":"R.","affiliations":[{"id":474,"text":"New York Water Science Center","active":true,"usgs":true}],"preferred":true,"id":423933,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70029704,"text":"70029704 - 2007 - Return to the wild: Translocation as a tool in conservation of the desert tortoise (Gopherus agassizii)","interactions":[],"lastModifiedDate":"2019-11-11T13:24:18","indexId":"70029704","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1015,"text":"Biological Conservation","active":true,"publicationSubtype":{"id":10}},"title":"Return to the wild: Translocation as a tool in conservation of the desert tortoise (Gopherus agassizii)","docAbstract":"Translocation could be used as a tool in conservation of the threatened Mojave Desert Tortoise (Gopherus agassizii) by moving individuals from harm's way and into areas where they could contribute to conservation of the species. Numerous factors may affect the success of translocations, including the conditions experienced by tortoises in holding facilities while awaiting translocation. The tortoises available for our translocation study had been provided supplemental water during their years spent in a captive holding facility, potentially inducing carelessness in water conservation. In addition to generally investigating the efficacy of translocation, we compared the effects of continuing with the effects of ceasing the holding facility's water supplementation regimen. After exposure to one of the two water regimens, all tortoises were given the opportunity to hydrate immediately prior to release. We examined behavior, body mass, carapace length, movement, and mortality of tortoises for two activity seasons following release to the wild. Water supplementation was correlated with high rates of carapace growth and distant movements by males after release. Lengthy movements following translocation may be problematic for conservation planning, but this should be evaluated in light of the goals and circumstances of each translocation project. Although the mortality rate was 21.4% in 1997, data suggest that drought conditions at the site rather than the translocation itself negatively affected the tortoises. None of the tortoises died during their second season at the site. Our results indicate that translocation should be considered a useful tool in conservation of the Desert Tortoise.
","language":"English","publisher":"Elsevier Science","doi":"10.1016/j.biocon.2006.11.022","issn":"00063207","usgsCitation":"Field, K., Tracy, C., Medica, P., Marlow, R., and Corn, P., 2007, Return to the wild: Translocation as a tool in conservation of the desert tortoise (Gopherus agassizii): Biological Conservation, v. 136, no. 2, p. 232-245, https://doi.org/10.1016/j.biocon.2006.11.022.","productDescription":"14 p.","startPage":"232","endPage":"245","numberOfPages":"14","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":240478,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212913,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.biocon.2006.11.022"}],"country":"United States","state":"Nevada","otherGeospatial":"Mojave 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\"}}]}","volume":"136","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aac2de4b0c8380cd86bd1","contributors":{"authors":[{"text":"Field, K.J.","contributorId":30451,"corporation":false,"usgs":true,"family":"Field","given":"K.J.","affiliations":[],"preferred":false,"id":423928,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tracy, C.R.","contributorId":73524,"corporation":false,"usgs":true,"family":"Tracy","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":423930,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Medica, P.A.","contributorId":77079,"corporation":false,"usgs":true,"family":"Medica","given":"P.A.","email":"","affiliations":[],"preferred":false,"id":423931,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Marlow, R.W.","contributorId":20276,"corporation":false,"usgs":true,"family":"Marlow","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":423927,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Corn, P.S.","contributorId":63751,"corporation":false,"usgs":true,"family":"Corn","given":"P.S.","affiliations":[],"preferred":false,"id":423929,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70029703,"text":"70029703 - 2007 - Biological uptake of polychlorinated biphenyls by Macoma balthica from sediment amended with activated carbon","interactions":[],"lastModifiedDate":"2023-08-22T11:16:52.003308","indexId":"70029703","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Biological uptake of polychlorinated biphenyls by Macoma balthica from sediment amended with activated carbon","docAbstract":"This work characterizes the efficacy of activated carbon amendment in reducing polychlorinated biphenyl (PCB) bioavailability to clams (Macoma balthica) from field-contaminated sediment (Hunters Point Naval Shipyard, San Francisco Bay, CA, USA). Test methods were developed for the use of clams to investigate the effects of sediment amendment on biological uptake. Sediment was mixed with activated carbon for one month. Bioaccumulation tests (28 d) were employed to assess the relationships between carbon dose and carbon particle size on observed reductions in clam biological uptake of PCBs. Extraction and cleanup protocols were developed for the clam tissue. Efficacy of activated carbon treatment was found to increase with both increasing carbon dose and decreasing carbon particle size. Average reductions in bioaccumulation of 22, 64, and 84% relative to untreated Hunters Point sediment were observed for carbon amendments of 0.34, 1.7, and 3.4%, respectively. Average bioaccumulation reductions of 41, 73, and 89% were observed for amendments (dose = 1.7% dry wt) with carbon particles of 180 to 250, 75 to 180, and 25 to 75 μm, respectively, in diameter, indicating kinetic phenomena in these tests. Additionally, a biodynamic model quantifying clam PCB uptake from water and sediment as well as loss through elimination provided a good fit of experimental data. Model predictions suggest that the sediment ingestion route contributed 80 to 95% of the PCB burdens in the clams.
Coupled measurements of nitrate (NO3−), nitrogen (N), and oxygen (O) isotopic composition (δ15NNO3 and δ18ONO3) were made in surface waters of Monterey Bay to investigate multiple N cycling processes occurring within surface waters. Profiles collected throughout the year at three sites exhibit a wide range of values, suggesting simultaneous and variable influence of both phytoplankton NO3− assimilation and nitrification within the euphotic zone. Specifically, increases in δ18ONO3 were consistently greater than those in δ15NNO3. A coupled isotope steady state box model was used to estimate the amount of NO3− supplied by nitrification in surface waters relative to that supplied from deeper water. The model highlights the importance of the branching reaction during ammonium (NH4+) consumption, in which NH4+ either serves as a substrate for regenerated production or for nitrification. Our observations indicate that a previously unrecognized proportion of nitrate‐based productivity, on average 15 to 27%, is supported by nitrification in surface waters and should not be considered new production. This work also highlights the need for a better understanding of isotope effects of NH4+ oxidation, NH4+ assimilation, and NO3− assimilation in marine environments.
Mining-impacted streams have been shown to undergo diel (24-h) fluctuations in concentrations of major and trace elements. Fisher Creek in south-central Montana, USA receives acid rock drainage (ARD) from natural and mining-related sources. A previous diel field study found substantial changes in dissolved metal concentrations at three sites with differing pH regimes during a 24-h period in August 2002. The current work discusses follow-up field sampling of Fisher Creek as well as field and laboratory experiments that examine in greater detail the underlying processes involved in the observed diel concentration changes. The field experiments employed in-stream chambers that were either transparent or opaque to light, filled with stream water and sediment (cobbles coated with hydrous Fe and Al oxides), and placed in the stream to maintain the same temperature. Three sets of laboratory experiments were performed: (1) equilibration of a Cu(II) and Zn(II) containing solution with Fisher Creek stream sediment at pH 6.9 and different temperatures; (2) titration of Fisher Creek water from pH 3.1 to 7 under four different isothermal conditions; and (3) analysis of the effects of temperature on the interaction of an Fe(II) containing solution with Fisher Creek stream sediment under non-oxidizing conditions. Results of these studies are consistent with a model in which Cu, Fe(II), and to a lesser extent Zn, are adsorbed or co-precipitated with hydrous Fe and Al oxides as the pH of Fisher Creek increases from 5.3 to 7.0. The extent of metal attenuation is strongly temperature-dependent, being more pronounced in warm vs. cold water. Furthermore, the sorption/co-precipitation process is shown to be irreversible; once the Cu, Zn, and Fe(II) are removed from solution in warm water, a decrease in temperature does not release the metals back to the water column.
","language":"English","publisher":"Springer","doi":"10.1007/s11270-006-9297-5","usgsCitation":"Parker, S.R., Gammons, C.H., Jones, C.A., and Nimick, D.A., 2007, Role of hydrous iron oxide formation in attenuation and diel cycling of dissolved trace metals in a stream affected by acid rock drainage: Water, Air, & Soil Pollution, v. 181, no. 1-4, p. 247-263, https://doi.org/10.1007/s11270-006-9297-5.","productDescription":"17 p.","startPage":"247","endPage":"263","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240209,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Montana","otherGeospatial":"Fisher Creek","volume":"181","issue":"1-4","noUsgsAuthors":false,"publicationDate":"2006-12-08","publicationStatus":"PW","scienceBaseUri":"505aae55e4b0c8380cd87090","contributors":{"authors":[{"text":"Parker, Stephen R.","contributorId":140802,"corporation":false,"usgs":false,"family":"Parker","given":"Stephen","email":"","middleInitial":"R.","affiliations":[{"id":13574,"text":"Montana Tech of the University of Montana, Butte, MT","active":true,"usgs":false}],"preferred":false,"id":424517,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gammons, Chris","contributorId":140801,"corporation":false,"usgs":false,"family":"Gammons","given":"Chris","affiliations":[{"id":13574,"text":"Montana Tech of the University of Montana, Butte, MT","active":true,"usgs":false}],"preferred":false,"id":424516,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jones, Clain A.","contributorId":69917,"corporation":false,"usgs":false,"family":"Jones","given":"Clain","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":424518,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nimick, David A. dnimick@usgs.gov","contributorId":421,"corporation":false,"usgs":true,"family":"Nimick","given":"David","email":"dnimick@usgs.gov","middleInitial":"A.","affiliations":[{"id":573,"text":"Special Applications Science Center","active":true,"usgs":true},{"id":5050,"text":"WY-MT Water Science Center","active":true,"usgs":true}],"preferred":true,"id":424519,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70029726,"text":"70029726 - 2007 - Comparative growth and consumption potential of rainbow trout and humpback chub in the Colorado River, Grand Canyon, Arizona, under different temperature scenarios","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029726","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3451,"text":"Southwestern Naturalist","active":true,"publicationSubtype":{"id":10}},"title":"Comparative growth and consumption potential of rainbow trout and humpback chub in the Colorado River, Grand Canyon, Arizona, under different temperature scenarios","docAbstract":"We used bioenergetics models for humpback chub, Gila cypha, and rainbow trout, Oncorhynchus mykiss, to examine how warmer water temperatures in the Colorado River, Grand Canyon, Arizona, through a proposed selective withdrawal system (SWS) at Glen Canyon Dam, would affect growth, consumption, and predation rates. Consumption by the rainbow trout population was at least 10 times higher than by the smaller humpback chub population. Water temperature increases of 6??C during autumn increased growth of humpback chub and likely increased their survival by reducing the time vulnerable to predation. Water temperature increases caused by drought in 2005 did not alter humpback chub growth as much as the SWS. Increased temperatures might cause changes to the invertebrate community and the distribution and abundance of other warmwater nonnative fishes. The implications on the entire aquatic community need to be considered before any management action that includes increasing water temperatures is implemented.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Southwestern Naturalist","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1894/0038-4909(2007)52[234:CGACPO]2.0.CO;2","issn":"00384909","usgsCitation":"Paukert, C., and Petersen, J., 2007, Comparative growth and consumption potential of rainbow trout and humpback chub in the Colorado River, Grand Canyon, Arizona, under different temperature scenarios: Southwestern Naturalist, v. 52, no. 2, p. 234-242, https://doi.org/10.1894/0038-4909(2007)52[234:CGACPO]2.0.CO;2.","startPage":"234","endPage":"242","numberOfPages":"9","costCenters":[],"links":[{"id":240272,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212737,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1894/0038-4909(2007)52[234:CGACPO]2.0.CO;2"}],"volume":"52","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f81be4b0c8380cd4ceaa","contributors":{"authors":[{"text":"Paukert, C.P.","contributorId":10151,"corporation":false,"usgs":true,"family":"Paukert","given":"C.P.","email":"","affiliations":[],"preferred":false,"id":424024,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Petersen, J.H.","contributorId":72154,"corporation":false,"usgs":true,"family":"Petersen","given":"J.H.","email":"","affiliations":[],"preferred":false,"id":424025,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ]}