{"pageNumber":"2346","pageRowStart":"58625","pageSize":"25","recordCount":184617,"records":[{"id":70032801,"text":"70032801 - 2007 - A chronology of Late-Pleistocene permafrost events in southern New Jersey, eastern USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:24","indexId":"70032801","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3032,"text":"Permafrost and Periglacial Processes","active":true,"publicationSubtype":{"id":10}},"title":"A chronology of Late-Pleistocene permafrost events in southern New Jersey, eastern USA","docAbstract":"Frost fissures, filled with wind-abraded sand and mineral soil, and numerous small-scale non-diastrophic deformations, occur in the near-surface sediments of the Pine Barrens of southern New Jersey. The fissures are the result of thermal-contraction cracking and indicate the previous existence of either permafrost or seasonally-frozen ground. The deformations reflect thermokarst activity that occurred when permafrost degraded, icy layers melted and density-controlled mass displacements occurred in water-saturated sediments. Slopes and surficial materials of the area reflect these cold-climate conditions. Optically-stimulated luminescence permits construction of a tentative Late-Pleistocene permafrost chronology. This indicates Illinoian, Early-Wisconsinan and Late-Wisconsinan episodes of permafrost and/or deep seasonal frost and a Middle-Wisconsinan thermokarst event. Copyright ?? 2007 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Permafrost and Periglacial Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/ppp.572","issn":"10456740","usgsCitation":"French, H., Demitroff, M., Forman, S., and Newell, W.L., 2007, A chronology of Late-Pleistocene permafrost events in southern New Jersey, eastern USA: Permafrost and Periglacial Processes, v. 18, no. 1, p. 49-59, https://doi.org/10.1002/ppp.572.","startPage":"49","endPage":"59","numberOfPages":"11","costCenters":[],"links":[{"id":213868,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/ppp.572"},{"id":241533,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"18","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-02-22","publicationStatus":"PW","scienceBaseUri":"5059e341e4b0c8380cd45eed","contributors":{"authors":[{"text":"French, H.M.","contributorId":26888,"corporation":false,"usgs":true,"family":"French","given":"H.M.","email":"","affiliations":[],"preferred":false,"id":437970,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Demitroff, M.","contributorId":101891,"corporation":false,"usgs":true,"family":"Demitroff","given":"M.","email":"","affiliations":[],"preferred":false,"id":437973,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Forman, S.L.","contributorId":38597,"corporation":false,"usgs":true,"family":"Forman","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":437971,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Newell, Wayne L. wnewell@usgs.gov","contributorId":99114,"corporation":false,"usgs":true,"family":"Newell","given":"Wayne","email":"wnewell@usgs.gov","middleInitial":"L.","affiliations":[],"preferred":false,"id":437972,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70031105,"text":"70031105 - 2007 - Reproductive biology of the violet-chested hummingbird in Venezuela and comparisons with other tropical and temperate hummingbirds","interactions":[],"lastModifiedDate":"2012-03-12T17:21:16","indexId":"70031105","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1318,"text":"Condor","active":true,"publicationSubtype":{"id":10}},"title":"Reproductive biology of the violet-chested hummingbird in Venezuela and comparisons with other tropical and temperate hummingbirds","docAbstract":"We provide details on the breeding biology of the Violet-chested Hummingbird (Sternoclyta cyanopectus) based on 67 nests studied in Yacambu?? National Park, Venezuela, from 2002 through 2006. Clutch size was two white eggs, usually laid every other day. Fresh egg mass (0.95 ?? 0.14 g) was 15% of female mass. Incubation and nestling periods were 20.4 ?? 0.3 and 26.0 ?? 0.4 days, respectively. Nest attentiveness increased from 60% in early incubation to 68% in late incubation. The female spent 50% of her time brooding young nestlings, but ceased brooding by 13 days of age. Only the female fed the young, with a low rate of nest visitation (3.3 trips per hour) that did not increase with age of the young. Growth rate based on nestling mass (K = 0.28) was slow. Daily predation rates decreased across stages and were 0.064 ?? 0.044, 0.033 ?? 0.008, and 0.020 ?? 0.006 during the egg-laying, incubation, and nestling periods, respectively. Most, but not all, life history traits of the Violet-chested Hummingbird were similar to those reported for other tropical and temperate hummingbirds, providing further evidence that this family shows a relatively narrow range of life history variation. ?? The Cooper Ornithological Society 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Condor","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1650/8305.1","issn":"00105422","usgsCitation":"Fierro-Calderon, K., and Martin, T.E., 2007, Reproductive biology of the violet-chested hummingbird in Venezuela and comparisons with other tropical and temperate hummingbirds: Condor, v. 109, no. 3, p. 680-685, https://doi.org/10.1650/8305.1.","startPage":"680","endPage":"685","numberOfPages":"6","costCenters":[],"links":[{"id":211514,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1650/8305.1"},{"id":238813,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"109","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aa8c1e4b0c8380cd85a6b","contributors":{"authors":[{"text":"Fierro-Calderon, Karolina","contributorId":13500,"corporation":false,"usgs":true,"family":"Fierro-Calderon","given":"Karolina","email":"","affiliations":[],"preferred":false,"id":430055,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Martin, T. E.","contributorId":10911,"corporation":false,"usgs":true,"family":"Martin","given":"T.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":430054,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70033159,"text":"70033159 - 2007 - Preface to the Madison declaration and critical synthesis papers on mercury pollution","interactions":[],"lastModifiedDate":"2018-10-17T08:44:17","indexId":"70033159","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":698,"text":"Ambio","active":true,"publicationSubtype":{"id":10}},"title":"Preface to the Madison declaration and critical synthesis papers on mercury pollution","docAbstract":"

No abstract available.

","largerWorkTitle":"Ambio","language":"English","publisher":"Royal Swedish Academy of Sciences","doi":"10.1579/0044-7447(2007)36[2:PTTMDA]2.0.CO;2","issn":"00447447","usgsCitation":"Hurley, J., Krabbenhoft, D., Wiener, J.G., and Babiarz, C., 2007, Preface to the Madison declaration and critical synthesis papers on mercury pollution: Ambio, v. 36, no. 1, p. 2-2, https://doi.org/10.1579/0044-7447(2007)36[2:PTTMDA]2.0.CO;2.","productDescription":"1 p.","startPage":"2","endPage":"2","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240786,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213185,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1579/0044-7447(2007)36[2:PTTMDA]2.0.CO;2"}],"volume":"36","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8214e4b0c8380cd7b8c4","contributors":{"authors":[{"text":"Hurley, James P.","contributorId":147931,"corporation":false,"usgs":false,"family":"Hurley","given":"James P.","affiliations":[{"id":6913,"text":"Wisconsin Department of Natural Resources","active":true,"usgs":false}],"preferred":false,"id":439627,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Krabbenhoft, David P. 0000-0003-1964-5020 dpkrabbe@usgs.gov","orcid":"https://orcid.org/0000-0003-1964-5020","contributorId":118001,"corporation":false,"usgs":true,"family":"Krabbenhoft","given":"David P.","email":"dpkrabbe@usgs.gov","affiliations":[{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":false,"id":439626,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wiener, James G.","contributorId":93853,"corporation":false,"usgs":false,"family":"Wiener","given":"James","email":"","middleInitial":"G.","affiliations":[{"id":17913,"text":"River Studies Center, University of Wisconsin-La Crosse","active":true,"usgs":false}],"preferred":false,"id":439625,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Babiarz, Christopher L.","contributorId":101822,"corporation":false,"usgs":false,"family":"Babiarz","given":"Christopher L.","affiliations":[],"preferred":false,"id":439628,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70031066,"text":"70031066 - 2007 - A unified equation for calculating methane vapor pressures in the CH4-H2O system with measured Raman shifts","interactions":[],"lastModifiedDate":"2012-03-12T17:21:16","indexId":"70031066","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1759,"text":"Geochimica et Cosmochimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"A unified equation for calculating methane vapor pressures in the CH4-H2O system with measured Raman shifts","docAbstract":"A unified equation has been derived by using all available data for calculating methane vapor pressures with measured Raman shifts of C-H symmetric stretching band (??1) in the vapor phase of sample fluids near room temperature. This equation eliminates discrepancies among the existing data sets and can be applied at any Raman laboratory. Raman shifts of C-H symmetric stretching band of methane in the vapor phase of CH4-H2O mixtures prepared in a high-pressure optical cell were also measured at temperatures between room temperature and 200 ??C, and pressures up to 37 MPa. The results show that the CH4 ??1 band position shifts to higher wavenumber as temperature increases. We also demonstrated that this Raman band shift is a simple function of methane vapor density, and, therefore, when combined with equation of state of methane, methane vapor pressures in the sample fluids at elevated temperatures can be calculated from measured Raman peak positions. This method can be applied to determine the pressure of CH4-bearing systems, such as methane-rich fluid inclusions from sedimentary basins or experimental fluids in hydrothermal diamond-anvil cell or other types of optical cell. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geochimica et Cosmochimica Acta","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.gca.2007.06.004","issn":"00167037","usgsCitation":"Lu, W., Chou, I., Burruss, R., and Song, Y., 2007, A unified equation for calculating methane vapor pressures in the CH4-H2O system with measured Raman shifts: Geochimica et Cosmochimica Acta, v. 71, no. 16, p. 3969-3978, https://doi.org/10.1016/j.gca.2007.06.004.","startPage":"3969","endPage":"3978","numberOfPages":"10","costCenters":[],"links":[{"id":211483,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.gca.2007.06.004"},{"id":238778,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"71","issue":"16","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e60ae4b0c8380cd47111","contributors":{"authors":[{"text":"Lu, W.","contributorId":47576,"corporation":false,"usgs":true,"family":"Lu","given":"W.","email":"","affiliations":[],"preferred":false,"id":429893,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chou, I.-M. 0000-0001-5233-6479","orcid":"https://orcid.org/0000-0001-5233-6479","contributorId":44283,"corporation":false,"usgs":true,"family":"Chou","given":"I.-M.","affiliations":[{"id":245,"text":"Eastern Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":429892,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Burruss, R.C. 0000-0001-6827-804X","orcid":"https://orcid.org/0000-0001-6827-804X","contributorId":99574,"corporation":false,"usgs":true,"family":"Burruss","given":"R.C.","affiliations":[],"preferred":false,"id":429895,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Song, Y.","contributorId":92443,"corporation":false,"usgs":true,"family":"Song","given":"Y.","email":"","affiliations":[],"preferred":false,"id":429894,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70033154,"text":"70033154 - 2007 - Silurian extension in the Upper Connecticut Valley, United States and the origin of middle Paleozoic basins in the Québec embayment","interactions":[],"lastModifiedDate":"2015-04-13T10:10:55","indexId":"70033154","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":732,"text":"American Journal of Science","active":true,"publicationSubtype":{"id":10}},"title":"Silurian extension in the Upper Connecticut Valley, United States and the origin of middle Paleozoic basins in the Québec embayment","docAbstract":"

Pre-Silurian strata of the Bronson Hill arch (BHA) in the Upper Connecticut Valley, NH-VT are host to the latest Ludlow Comerford Intrusive Suite consisting, east to west, of a mafic dike swarm with sheeted dikes, and an intrusive complex. The rocks are mostly mafic but with compositions ranging from gabbro to leucocratic tonalite. The suite is truncated on the west by the Monroe fault, a late Acadian thrust that carries rocks of the BHA westward over Silurian-Devonian strata of the Connecticut Valley-Gaspe?? trough (CVGT). Dikes intrude folded strata with a pre-intrusion metamorphic fabric (Taconian?) but they experienced Acadian deformation. Twenty fractions of zircon and baddeleyite from three sample sites of gabbrodiorite spanning nearly 40 km yield a weighted 207Pb/206Pb age of 419 ?? 1 Ma. Greenschist-facies dikes, sampled over a strike distance of 35 km, were tholeiitic basalts formed by partial melting of asthenospheric mantle, with little or no influence from mantle or crustal lithosphere. The dike chemistry is similar to mid-ocean ridge, within-plate, and back-arc basin basalts. Parent magmas originated in the asthenosphere and were erupted through severely thinned lithosphere adjacent to the CVGT. Extensive middle Paleozoic basins in the internides of the Appalachian orogen are restricted to the Que??bec embayment of the Laurentian rifted margin, and include the CVGT and the Central Maine trough (CMT), separated from the BHA by a Silurian tectonic hinge. The NE-trending Comerford intrusions parallel the CVGT, CMT, and the tectonic hinge, and indicate NW-SE extension. During post-Taconian convergence, the irregular margins of composite Laurentia and Avalon permitted continued collision in Newfoundland (St. Lawrence promontory) and coeval extension in the Que??bec embayment. Extension may be related to hinge retreat of the northwest directed Brunswick subduction complex and rise of the asthenosphere following slab break-off. An alternative hypothesis is that the basins originated as pull-apart basins between northwest-trending, left-stepping, sinistral strike-slip faults along the southern flanks of the New York and St. Lawrence promontories.

","language":"English","publisher":"American Journal of Science","doi":"10.2475/01.2007.07","issn":"00029599","usgsCitation":"Rankin, D., Coish, R., Tucker, R.D., Peng, Z., Wilson, S., and Rouff, A., 2007, Silurian extension in the Upper Connecticut Valley, United States and the origin of middle Paleozoic basins in the Québec embayment: American Journal of Science, v. 307, no. 1, p. 216-264, https://doi.org/10.2475/01.2007.07.","productDescription":"49 p.","startPage":"216","endPage":"264","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":477021,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.2475/01.2007.07","text":"Publisher Index Page"},{"id":240719,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213126,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2475/01.2007.07"}],"volume":"307","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-05-11","publicationStatus":"PW","scienceBaseUri":"505b8f3fe4b08c986b318e02","contributors":{"authors":[{"text":"Rankin, D.W.","contributorId":32579,"corporation":false,"usgs":true,"family":"Rankin","given":"D.W.","email":"","affiliations":[],"preferred":false,"id":439605,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Coish, R.A.","contributorId":48764,"corporation":false,"usgs":true,"family":"Coish","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":439607,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tucker, R. D.","contributorId":43409,"corporation":false,"usgs":false,"family":"Tucker","given":"R.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":439606,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Peng, Z.X.","contributorId":19373,"corporation":false,"usgs":true,"family":"Peng","given":"Z.X.","email":"","affiliations":[],"preferred":false,"id":439603,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Wilson, S. A. 0000-0002-9468-0005","orcid":"https://orcid.org/0000-0002-9468-0005","contributorId":23561,"corporation":false,"usgs":true,"family":"Wilson","given":"S. A.","affiliations":[],"preferred":false,"id":439604,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Rouff, A.A.","contributorId":51987,"corporation":false,"usgs":true,"family":"Rouff","given":"A.A.","email":"","affiliations":[],"preferred":false,"id":439608,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70031068,"text":"70031068 - 2007 - Quantitative PCR detection of Batrachochytrium dendrobatidis DNA from sediments and water","interactions":[],"lastModifiedDate":"2018-10-17T08:26:57","indexId":"70031068","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":"Quantitative PCR detection of Batrachochytrium dendrobatidis DNA from sediments and water","docAbstract":"

The fungal pathogen Batrachochytrium dendrobatidis (Bd) causes chytridiomycosis, a disease implicated in amphibian declines on 5 continents. Polymerase chain reaction (PCR) primer sets exist with which amphibians can be tested for this disease, and advances in sampling techniques allow non-invasive testing of animals. We developed filtering and PCR based quantitative methods by modifying existing PCR assays to detect Bd DNA in water and sediments, without the need for testing amphibians; we tested the methods at 4 field sites. The SYBR based assay using Boyle primers (SYBR/Boyle assay) and the Taqman based assay using Wood primers performed similarly with samples generated in the laboratory (Bd spiked filters), but the SYBR/Boyle assay detected Bd DNA in more field samples. We detected Bd DNA in water from 3 of 4 sites tested, including one pond historically negative for chytridiomycosis. Zoospore equivalents in sampled water ranged from 19 to 454 l-1 (nominal detection limit is 10 DNA copies, or about 0.06 zoospore). We did not detect DNA of Bd from sediments collected at any sites. Our filtering and amplification methods provide a new tool to investigate critical aspects of Bd in the environment.

","language":"English","publisher":"Inter-Research","doi":"10.3354/dao01831","issn":"01775103","usgsCitation":"Kirshtein, J.D., Anderson, C., Wood, J., Longcore, J.E., and Voytek, M.A., 2007, Quantitative PCR detection of Batrachochytrium dendrobatidis DNA from sediments and water: Diseases of Aquatic Organisms, v. 77, no. 1, p. 11-15, https://doi.org/10.3354/dao01831.","productDescription":"5 p.","startPage":"11","endPage":"15","numberOfPages":"5","costCenters":[{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":487663,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3354/dao01831","text":"Publisher Index Page"},{"id":238780,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211484,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3354/dao01831"}],"volume":"77","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a91f9e4b0c8380cd8059d","contributors":{"authors":[{"text":"Kirshtein, Julie D.","contributorId":26033,"corporation":false,"usgs":true,"family":"Kirshtein","given":"Julie","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":429899,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Anderson, Chauncey W. 0000-0002-1016-3781 chauncey@usgs.gov","orcid":"https://orcid.org/0000-0002-1016-3781","contributorId":1151,"corporation":false,"usgs":true,"family":"Anderson","given":"Chauncey W.","email":"chauncey@usgs.gov","affiliations":[{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true}],"preferred":false,"id":429898,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wood, J.S.","contributorId":43974,"corporation":false,"usgs":true,"family":"Wood","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":429900,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Longcore, Joyce E.","contributorId":67464,"corporation":false,"usgs":true,"family":"Longcore","given":"Joyce","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":429902,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Voytek, Mary A.","contributorId":91943,"corporation":false,"usgs":true,"family":"Voytek","given":"Mary","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":429901,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70031069,"text":"70031069 - 2007 - Tectonic uplift, threshold hillslopes, and denudation rates in a developing mountain range","interactions":[],"lastModifiedDate":"2012-03-12T17:21:16","indexId":"70031069","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":"Tectonic uplift, threshold hillslopes, and denudation rates in a developing mountain range","docAbstract":"Studies across a broad range of drainage basins have established a positive correlation between mean slope gradient and denudation rates. It has been suggested, however, that this relationship breaks down for catchments where slopes are at their threshold angle of stability because, in such cases, denudation is controlled by the rate of tectonic uplift through the rate of channel incision and frequency of slope failure. This mechanism is evaluated for the San Bernardino Mountains, California, a nascent range that incorporates both threshold hill-slopes and remnants of pre-uplift topography. Concentrations of in situ-produced cosmogenic 10Be in alluvial sediments are used to quantify catchment-wide denudation rates and show a broadly linear relationship with mean slope gradient up to ???30??: above this value denudation rates vary substantially for similar mean slope gradients. We propose that this decoupling in the slope gradient-denudation rate relationship marks the emergence of threshold topography and coincides with the transition from transport-limited to detachment-limited denudation. The survival in the San Bernardino Mountains of surfaces formed prior to uplift provides information on the topographic evolution of the range, in particular the transition from slope-gradient-dependent rates of denudation to a regime where denudation rates are controlled by rates of tectonic uplift. This type of transition may represent a general model for the denudational response to orogenic uplift and topographic evolution during the early stages of mountain building. ?? 2007 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/G23641A.1","issn":"00917613","usgsCitation":"Binnie, S., Phillips, W., Summerfield, M., and Fifield, L., 2007, Tectonic uplift, threshold hillslopes, and denudation rates in a developing mountain range: Geology, v. 35, no. 8, p. 743-746, https://doi.org/10.1130/G23641A.1.","startPage":"743","endPage":"746","numberOfPages":"4","costCenters":[],"links":[{"id":211512,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/G23641A.1"},{"id":238811,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"35","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba482e4b08c986b3203c9","contributors":{"authors":[{"text":"Binnie, S.A.","contributorId":43975,"corporation":false,"usgs":true,"family":"Binnie","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":429904,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Phillips, W.M.","contributorId":49332,"corporation":false,"usgs":true,"family":"Phillips","given":"W.M.","email":"","affiliations":[],"preferred":false,"id":429906,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Summerfield, M.A.","contributorId":18970,"corporation":false,"usgs":true,"family":"Summerfield","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":429903,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fifield, L.K.","contributorId":47575,"corporation":false,"usgs":true,"family":"Fifield","given":"L.K.","email":"","affiliations":[],"preferred":false,"id":429905,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70032951,"text":"70032951 - 2007 - Effects of population increase on cui-ui growth and maturation","interactions":[],"lastModifiedDate":"2012-03-12T17:21:39","indexId":"70032951","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3624,"text":"Transactions of the American Fisheries Society","active":true,"publicationSubtype":{"id":10}},"title":"Effects of population increase on cui-ui growth and maturation","docAbstract":"Cui-ui Chasmistes cujus is endemic to Pyramid Lake, Nevada. The cui-ui population declined during much of the 20th century as a result of water diversion and the formation of a shallow and virtually impassable delta at the mouth of the Truckee River, its spawning habitat. The population increased more than 10-fold to more than 1 million adults after access to the river was restored, creating a period of relatively higher density. This change presented the opportunity to test intraspecific density effects on cui-ui age and length at maturity and on growth. We also compared the year-class structure of the adult population before and after improved access. At low density, cui-ui mean age at maturation was 9.2 years for males and 9.6 for females; at high density, it was significantly higher: 11.8 years for males and 12.0 for females. There was no significant change in mean fork length at maturity related to population increase. Growth patterns differed between high and low density, the low-density fish growing faster than high-density fish before their respective mean age of maturity; past their mean age at maturity, high-density fish grew significantly faster than low-density fish. Fish in both density periods reached similar lengths by about 19-20 years of age. Year-class structure for both density periods consisted of strong year-classes, which predominated the adult population for several years.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Transactions of the American Fisheries Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/T05-199.1","issn":"00028487","usgsCitation":"Scoppettone, G., and Rissler, P., 2007, Effects of population increase on cui-ui growth and maturation: Transactions of the American Fisheries Society, v. 136, no. 2, p. 331-340, https://doi.org/10.1577/T05-199.1.","startPage":"331","endPage":"340","numberOfPages":"10","costCenters":[],"links":[{"id":213145,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/T05-199.1"},{"id":240741,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"136","issue":"2","noUsgsAuthors":false,"publicationDate":"2011-01-09","publicationStatus":"PW","scienceBaseUri":"505a0787e4b0c8380cd51734","contributors":{"authors":[{"text":"Scoppettone, G.G.","contributorId":22793,"corporation":false,"usgs":true,"family":"Scoppettone","given":"G.G.","email":"","affiliations":[],"preferred":false,"id":438675,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rissler, P.H.","contributorId":47539,"corporation":false,"usgs":true,"family":"Rissler","given":"P.H.","affiliations":[],"preferred":false,"id":438676,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70032958,"text":"70032958 - 2007 - Olivine friction at the base of oceanic seismogenic zones","interactions":[],"lastModifiedDate":"2012-03-12T17:21:37","indexId":"70032958","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2314,"text":"Journal of Geophysical Research B: Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Olivine friction at the base of oceanic seismogenic zones","docAbstract":"We investigate the strength and frictional behavior of olivine aggregates at temperatures and effective confining pressures similar to those at the base of the seismogenic zone on a typical ridge transform fault. Triaxial compression tests were conducted on dry olivine powder (grain size ???60 ??m) at effective confining pressures between 50 and 300 MPa (using Argon as a pore fluid), temperatures between 600??C and 1000??C, and axial displacement rates from 0.06 to 60 ??m/s (axial strain rates from 3 ?? 10-6 to 3 ?? 10-3 s-1). Yielding shows a negative pressure dependence, consistent with predictions for shear enhanced compaction and with the observation that samples exhibit compaction during the initial stages of the experiments. A combination of mechanical data and microstructural observations demonstrate that deformation was accommodated by frictional processes. Sample strengths were pressure-dependent and nearly independent of temperature. Localized shear zones formed in initially homogeneous aggregates early in the experiments. The frictional response to changes in loading rate is well described by rate and state constitutive laws, with a transition from velocity-weakening to velocity-strengthening at 1000??C. Microstructural observations and physical models indicate that plastic yielding of asperities at high temperatures and low axial strain rates stabilizes frictional sliding. Extrapolation of our experimental data to geologic strain rates indicates that a transition from velocity weakening to velocity strengthening occurs at approximately 600??C, consistent with the focal depths of earthquakes in the oceanic lithosphere. Copyright 2007 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research B: Solid Earth","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2006JB004301","issn":"01480227","usgsCitation":"Boettcher, M., Hirth, G., and Evans, B.M., 2007, Olivine friction at the base of oceanic seismogenic zones: Journal of Geophysical Research B: Solid Earth, v. 112, no. 1, https://doi.org/10.1029/2006JB004301.","costCenters":[],"links":[{"id":477029,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006jb004301","text":"Publisher Index Page"},{"id":213267,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2006JB004301"},{"id":240876,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"112","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-31","publicationStatus":"PW","scienceBaseUri":"505a6d6be4b0c8380cd7511f","contributors":{"authors":[{"text":"Boettcher, M.S.","contributorId":58847,"corporation":false,"usgs":true,"family":"Boettcher","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":438704,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hirth, G.","contributorId":88957,"corporation":false,"usgs":true,"family":"Hirth","given":"G.","email":"","affiliations":[],"preferred":false,"id":438705,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Evans, B. M.","contributorId":107872,"corporation":false,"usgs":false,"family":"Evans","given":"B.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":438706,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70032930,"text":"70032930 - 2007 - Diversity of terrestrial avifauna in response to distance from the shoreline of the Salton Sea","interactions":[],"lastModifiedDate":"2023-09-08T11:18:43.845764","indexId":"70032930","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2183,"text":"Journal of Arid Environments","active":true,"publicationSubtype":{"id":10}},"title":"Diversity of terrestrial avifauna in response to distance from the shoreline of the Salton Sea","docAbstract":"

Large aquatic bodies influence surrounding terrestrial ecosystems by providing water and nutrients. In arid landscapes, the increased primary productivity that results may greatly enhance vertebrate biodiversity. The Salton Sea, a large saline lake in the Colorado Desert of southern California, provides nutrients in the form of hundreds of thousands of dead fish carcasses, brine flies, and chemical compounds through windborne salt sea spray. We performed point counts for landbirds and shorebirds monthly or every other month between March 2001 and February 2002 across a sampling grid of 35 points along the west edge of Salton Sea. We found that avian diversity (numbers of species and numbers per species) was dependent on proximity to the Sea. Diversity was at a maximum nearest the shore, and was significantly lower away from the Sea's edge, at all surveyed distances up to 1 km from the shore. Cover by the dominant shrubs on the study site also corresponded to proximity to the water's edge. Whereas one may hypothesize that the avian diversity patterns are caused by these differences in vegetation structure, our data did not support this. Future studies should further investigate this potential correlation between vegetation and bird patterns. Until more is understood about the relationship between elevated avian diversity and the physical environment of the land-shore interface, our results suggest that the Sea's surface be stabilized near its present level. Future management schemes at the Salton Sea that include reductions of water sources should be carefully analyzed, so as to not jeopardize the terrestrial avifauna at this unique ecosystem.

","language":"English","publisher":"Elsevier","doi":"10.1016/j.jaridenv.2006.07.012","issn":"01401963","usgsCitation":"Mendelsohn, M., Boarman, W., Fisher, R., and Hathaway, S., 2007, Diversity of terrestrial avifauna in response to distance from the shoreline of the Salton Sea: Journal of Arid Environments, v. 68, no. 4, p. 574-587, https://doi.org/10.1016/j.jaridenv.2006.07.012.","productDescription":"14 p.","startPage":"574","endPage":"587","numberOfPages":"14","costCenters":[],"links":[{"id":240971,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"68","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0352e4b0c8380cd50423","contributors":{"authors":[{"text":"Mendelsohn, M.B.","contributorId":68676,"corporation":false,"usgs":true,"family":"Mendelsohn","given":"M.B.","email":"","affiliations":[],"preferred":false,"id":438589,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boarman, W.I.","contributorId":73523,"corporation":false,"usgs":true,"family":"Boarman","given":"W.I.","email":"","affiliations":[],"preferred":false,"id":438590,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fisher, Robert N. 0000-0002-2956-3240","orcid":"https://orcid.org/0000-0002-2956-3240","contributorId":51675,"corporation":false,"usgs":true,"family":"Fisher","given":"Robert N.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":438587,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hathaway, S.A.","contributorId":56990,"corporation":false,"usgs":true,"family":"Hathaway","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":438588,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70032933,"text":"70032933 - 2007 - Annual modulation of seismicity along the San Andreas Fault near Parkfield, CA","interactions":[],"lastModifiedDate":"2023-10-03T11:09:53.453459","indexId":"70032933","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":"Annual modulation of seismicity along the San Andreas Fault near Parkfield, CA","docAbstract":"

We analyze seismic data from the San Andreas Fault (SAF) near Parkfield, California, to test for annual modulation in seismicity rates. We use statistical analyses to show that seismicity is modulated with an annual period in the creeping section of the fault and a semiannual period in the locked section of the fault. Although the exact mechanism for seasonal triggering is undetermined, it appears that stresses associated with the hydrologic cycle are sufficient to fracture critically stressed rocks either through pore‐pressure diffusion or crustal loading/unloading. These results shed additional light on the state of stress along the SAF, indicating that hydrologically induced stress perturbations of ∼2 kPa may be sufficient to trigger earthquakes.

","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006GL028634","issn":"00948276","usgsCitation":"Christiansen, L., Hurwitz, S., and Ingebritsen, S.E., 2007, Annual modulation of seismicity along the San Andreas Fault near Parkfield, CA: Geophysical Research Letters, v. 34, no. 4, L04306, 5 p., https://doi.org/10.1029/2006GL028634.","productDescription":"L04306, 5 p.","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":487027,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006gl028634","text":"Publisher Index Page"},{"id":241004,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -121.38955997594803,\n 36.45406645165268\n ],\n [\n -121.38955997594803,\n 35.478200079045834\n ],\n [\n -119.6894256986042,\n 35.478200079045834\n ],\n [\n -119.6894256986042,\n 36.45406645165268\n ],\n [\n -121.38955997594803,\n 36.45406645165268\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"34","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-02-23","publicationStatus":"PW","scienceBaseUri":"5059ec29e4b0c8380cd490e5","contributors":{"authors":[{"text":"Christiansen, L.B.","contributorId":37952,"corporation":false,"usgs":true,"family":"Christiansen","given":"L.B.","email":"","affiliations":[],"preferred":false,"id":438597,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hurwitz, Shaul 0000-0001-5142-6886 shaulh@usgs.gov","orcid":"https://orcid.org/0000-0001-5142-6886","contributorId":2169,"corporation":false,"usgs":true,"family":"Hurwitz","given":"Shaul","email":"shaulh@usgs.gov","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":438598,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ingebritsen, Steven E. 0000-0001-6917-9369 seingebr@usgs.gov","orcid":"https://orcid.org/0000-0001-6917-9369","contributorId":818,"corporation":false,"usgs":true,"family":"Ingebritsen","given":"Steven","email":"seingebr@usgs.gov","middleInitial":"E.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":438596,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70033045,"text":"70033045 - 2007 - The application of satellite differential SAR interferometry-derived ground displacements in hydrogeology","interactions":[],"lastModifiedDate":"2019-09-06T11:13:44","indexId":"70033045","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":"The application of satellite differential SAR interferometry-derived ground displacements in hydrogeology","docAbstract":"The application of satellite differential synthetic aperture radar (SAR) interferometry, principally coherent (InSAR) and to a lesser extent, persistent-scatterer (PSI) techniques to hydrogeologic studies has improved capabilities to map, monitor, analyze, and simulate groundwater flow, aquifer-system compaction and land subsidence. A number of investigations over the previous decade show how the spatially detailed images of ground displacements measured with InSAR have advanced hydrogeologic understanding, especially when a time series of images is used in conjunction with histories of changes in water levels and management practices. Important advances include: (1) identifying structural or lithostratigraphic boundaries (e.g. faults or transitional facies) of groundwater flow and deformation; (2) defining the material and hydraulic heterogeneity of deforming aquifer-systems; (3) estimating system properties (e.g. storage coefficients and hydraulic conductivities); and (4) constraining numerical models of groundwater flow, aquifer-system compaction, and land subsidence. As a component of an integrated approach to hydrogeologic monitoring and characterization of unconsolidated alluvial groundwater basins differential SAR interferometry contributes unique information that can facilitate improved management of groundwater resources. Future satellite SAR missions specifically designed for differential interferometry will enhance these contributions. ?? Springer-Verlag 2006.","largerWorkTitle":"Hydrogeology Journal","language":"English","doi":"10.1007/s10040-006-0121-5","issn":"14312174","usgsCitation":"Galloway, D., and Hoffmann, J., 2007, The application of satellite differential SAR interferometry-derived ground displacements in hydrogeology: Hydrogeology Journal, v. 15, no. 1, p. 133-154, https://doi.org/10.1007/s10040-006-0121-5.","startPage":"133","endPage":"154","numberOfPages":"22","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":35860,"text":"Ohio-Kentucky-Indiana Water Science Center","active":true,"usgs":true}],"links":[{"id":477168,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.460.3997","text":"External Repository"},{"id":241185,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213551,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10040-006-0121-5"}],"volume":"15","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-11-30","publicationStatus":"PW","scienceBaseUri":"505ba9c5e4b08c986b3224da","contributors":{"authors":[{"text":"Galloway, D. L. 0000-0003-0904-5355","orcid":"https://orcid.org/0000-0003-0904-5355","contributorId":31383,"corporation":false,"usgs":true,"family":"Galloway","given":"D. L.","affiliations":[{"id":35860,"text":"Ohio-Kentucky-Indiana Water Science Center","active":true,"usgs":true}],"preferred":false,"id":439108,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hoffmann, J.","contributorId":43530,"corporation":false,"usgs":true,"family":"Hoffmann","given":"J.","affiliations":[],"preferred":false,"id":439109,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70033223,"text":"70033223 - 2007 - The influence of major dams on hydrology through the drainage network of the Sacramento River basin, California","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70033223","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3301,"text":"River Research and Applications","active":true,"publicationSubtype":{"id":10}},"title":"The influence of major dams on hydrology through the drainage network of the Sacramento River basin, California","docAbstract":"This paper reports basinwide patterns of hydrograph alteration via statistical and graphical analysis from a network of long-term streamflow gauges located various distances downstream of major dams and confluences in the Sacramento River basin in California, USA. Streamflow data from 10 gauging stations downstream of major dams were divided into hydrologic series corresponding to the periods before and after dam construction. Pre- and post-dam flows were compared with respect to hydrograph characteristics representing frequency, magnitude and shape: annual flood peak, annual flow trough, annual flood volume, time to flood peak, flood drawdown time and interarrival time. The use of such a suite of characteristics within a statistical and graphical framework allows for generalising distinct strategies of flood control operation that can be identified without any a priori knowledge of operations rules. Dam operation is highly dependent on the ratio of reservoir capacity to annual flood volume (impounded runoff index). Dams with high values of this index generally completely cut off flood peaks thus reducing time to peak, drawdown time and annual flood volume. Those with low values conduct early and late flow releases to extend the hydrograph, increasing time to peak, drawdown time and annual flood volume. The analyses reveal minimal flood control benefits from foothill dams in the lower Sacramento River (i.e. dissipation of the down-valley flood control signal). The lower part of the basin is instead reliant on a weir and bypass system to control lowland flooding. Data from a control gauge (i.e. with no upstream dams) suggest a background signature of global climate change expressed as shortened flood hydrograph falling limbs and lengthened flood interarrival times at low exceedence probabilities. This research has implications for flood control, water resource management, aquatic and riparian ecosystems and for rehabilitation strategies involving flow alteration and/or manipulation of sediment supplies. Copyright ?? 2006 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"River Research and Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/rra.968","issn":"15351459","usgsCitation":"Singer, M., 2007, The influence of major dams on hydrology through the drainage network of the Sacramento River basin, California: River Research and Applications, v. 23, no. 1, p. 55-72, https://doi.org/10.1002/rra.968.","startPage":"55","endPage":"72","numberOfPages":"18","costCenters":[],"links":[{"id":213187,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/rra.968"},{"id":240790,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-10-26","publicationStatus":"PW","scienceBaseUri":"505bad2de4b08c986b323a2a","contributors":{"authors":[{"text":"Singer, M.B.","contributorId":67274,"corporation":false,"usgs":true,"family":"Singer","given":"M.B.","email":"","affiliations":[],"preferred":false,"id":439906,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70033052,"text":"70033052 - 2007 - North to Alaska: Evidence for conveyor belt transport of Dungeness crab larvae along the west coast of the United States and Canada","interactions":[],"lastModifiedDate":"2018-05-06T11:49:03","indexId":"70033052","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":"North to Alaska: Evidence for conveyor belt transport of Dungeness crab larvae along the west coast of the United States and Canada","docAbstract":"

We propose and evaluate the hypothesis that Dungeness crab (Cancer magister) larvae from the northwestern coast of the United States and Canada can be transported northward to southeastern Alaska. Larvae collected in southeastern Alaska during May and June 1997–2004 had abundances and stages that varied seasonally, interannually, and spatially. An unexpected presence of late-stage larvae in spring raises a question regarding their origin, and the most plausible explanation is that they hatched off the northern Washington and British Columbia coasts and were transported to southeastern Alaska. Buoy drift tracks support the hypothesis that larvae released off the northern Washington and British Columbia coasts during the peak hatching season can be physically transported to southeastern Alaska, arriving as late-stage larvae in May and June, when local larvae are only beginning to hatch. A northward spring progression of monthly mean 7°C SST isotherms and phytoplankton blooms provide further evidence that environmental conditions are conducive for larval growth and metabolism during the transport period. The proposed larval transport suggests possible unidirectional gene flow between southern and northern populations of Dungeness crabs in southeastern Alaska.

","language":"English","publisher":"ASLO","doi":"10.4319/lo.2007.52.1.0248","issn":"00243590","usgsCitation":"Park, W., Douglas, D., and Shirley, T.C., 2007, North to Alaska: Evidence for conveyor belt transport of Dungeness crab larvae along the west coast of the United States and Canada: Limnology and Oceanography, v. 52, no. 1, p. 248-256, https://doi.org/10.4319/lo.2007.52.1.0248.","productDescription":"9 p.","startPage":"248","endPage":"256","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":476977,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.4319/lo.2007.52.1.0248","text":"Publisher Index Page"},{"id":240747,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"52","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-16","publicationStatus":"PW","scienceBaseUri":"505a6826e4b0c8380cd73637","contributors":{"authors":[{"text":"Park, W.","contributorId":25764,"corporation":false,"usgs":true,"family":"Park","given":"W.","email":"","affiliations":[],"preferred":false,"id":439170,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Douglas, David C. 0000-0003-0186-1104 ddouglas@usgs.gov","orcid":"https://orcid.org/0000-0003-0186-1104","contributorId":150115,"corporation":false,"usgs":true,"family":"Douglas","given":"David C.","email":"ddouglas@usgs.gov","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":439169,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Shirley, Thomas C.","contributorId":17409,"corporation":false,"usgs":false,"family":"Shirley","given":"Thomas","email":"","middleInitial":"C.","affiliations":[{"id":12548,"text":"University of Alaska Fairbanks, School of Fisheries and Ocean Sciences","active":true,"usgs":false}],"preferred":false,"id":439168,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70033148,"text":"70033148 - 2007 - Estimating biomass of submersed vegetation using a simple rake sampling technique","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70033148","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Estimating biomass of submersed vegetation using a simple rake sampling technique","docAbstract":"We evaluated the use of a simple rake sampling technique for predicting the biomass of submersed aquatic vegetation. Vegetation sampled from impounded areas of the Mississippi River using a rake sampling technique, was compared with vegetation harvested from 0.33-m2 quadrats. The resulting data were used to model the relationship between rake indices and vegetation biomass (total and for individual species). We constructed linear regression models using log-transformed biomass data for sites sampled in 1999 and 2000. Data collected in 2001 were used to validate the resulting models. The coefficient of determination (R 2) for predicting total biomass was 0.82 and ranged from 0.59 (Potamogeton pectinatus) to 0.89 (Ceratophyllum demersum) for individual species. Application of the model to estimate total submersed aquatic vegetation is illustrated using data collected independent of this study. The accuracy and precision of the models tested indicate that the rake method data may be used to predict total vegetation biomass and biomass of selected species; however, the method should be tested in other regions, in other plant communities, and on other species. ?? 2006 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-006-0284-z","issn":"00188158","usgsCitation":"Kenow, K., Lyon, J., Hines, R.K., and Elfessi, A., 2007, Estimating biomass of submersed vegetation using a simple rake sampling technique: Hydrobiologia, v. 575, no. 1, p. 447-454, https://doi.org/10.1007/s10750-006-0284-z.","startPage":"447","endPage":"454","numberOfPages":"8","costCenters":[],"links":[{"id":213530,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-0284-z"},{"id":241160,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"575","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-09-01","publicationStatus":"PW","scienceBaseUri":"505a0b0ee4b0c8380cd52543","contributors":{"authors":[{"text":"Kenow, K.P.","contributorId":18302,"corporation":false,"usgs":true,"family":"Kenow","given":"K.P.","affiliations":[],"preferred":false,"id":439573,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lyon, J.E.","contributorId":46649,"corporation":false,"usgs":true,"family":"Lyon","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":439576,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hines, R. K.","contributorId":27819,"corporation":false,"usgs":true,"family":"Hines","given":"R.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":439574,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Elfessi, A.","contributorId":46467,"corporation":false,"usgs":true,"family":"Elfessi","given":"A.","affiliations":[],"preferred":false,"id":439575,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70033161,"text":"70033161 - 2007 - The impact of floods and storms on the acoustic reflectivity of the inner continental shelf: A modeling assessment","interactions":[],"lastModifiedDate":"2023-10-06T11:48:59.450669","indexId":"70033161","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1333,"text":"Continental Shelf Research","active":true,"publicationSubtype":{"id":10}},"title":"The impact of floods and storms on the acoustic reflectivity of the inner continental shelf: A modeling assessment","docAbstract":"

Flood deposition and storm reworking of sediments on the inner shelf can change the mixture of grain sizes on the seabed and thus its porosity, bulk density, bulk compressional velocity and reflectivity. Whether these changes are significant enough to be detectable by repeat sub-bottom sonar surveys, however, is uncertain. Here the question is addressed through numerical modeling. Episodic flooding of a large versus small river over the course of a century are modeled with HYDROTREND using the drainage basin characteristics of the Po and Pescara Rivers (respectively). A similarly long stochastic record of storms offshore of both rivers is simulated from the statistics of a long-term mooring recording of waves in the western Adriatic Sea. These time series are then input to the stratigraphic model SEDFLUX2D, which simulates flood deposition and storm reworking on the inner shelf beyond the river mouths. Finally, annual changes in seabed reflectivity across these shelf regions are computed from bulk densities output by SEDFLUX2D and compressional sound speeds computed from mean seafloor grain size using the analytical model of Buckingham [1997. Theory of acoustic attenuation, dispersion, and pulse propagation in unconsolidated granular materials including marine sediments. Journal of the Acoustical Society of America 102, 2579–2596; 1998. Theory of compressional and shear waves in fluidlike marine sediments. Journal of the Acoustical Society of America 103, 288–299; 2000. Wave propagation, stress relaxation, and grain-tograin shearing in saturated, unconsolidated marine sediments. Journal of the Acoustical Society of America 108, 2796–2815]. The modeling predicts reflectivities that change from <12 dB for sands on the innermost shelf to >9 dB for muds farther offshore, values that agree with reflectivity measurements for these sediment types. On local scales of ∼100 m, however, maximum changes in reflectivity are <0.5 dB. So are most annual changes in reflectivity over all water depths modeled (i.e., 0–35 m). Given that signal differences need to be ⩾2–3 dB to be resolved, the results suggest that grain-size induced changes in reflectivity caused by floods and storms will rarely be detectable by most current sub-bottom sonars.

","language":"English","publisher":"Elsevier","doi":"10.1016/j.csr.2005.12.018","issn":"02784343","usgsCitation":"Pratson, L.F., Hutton, E.W., Kettner, A., Syvitski, J., Hill, P., George, D., and Milligan, T., 2007, The impact of floods and storms on the acoustic reflectivity of the inner continental shelf: A modeling assessment: Continental Shelf Research, v. 27, no. 3-4, p. 542-559, https://doi.org/10.1016/j.csr.2005.12.018.","productDescription":"18 p.","startPage":"542","endPage":"559","numberOfPages":"18","costCenters":[],"links":[{"id":240853,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bace7e4b08c986b32381e","contributors":{"authors":[{"text":"Pratson, Lincoln F.","contributorId":105885,"corporation":false,"usgs":false,"family":"Pratson","given":"Lincoln","email":"","middleInitial":"F.","affiliations":[{"id":7135,"text":"Lamont Doherty Earth Observatory, Columbia University, Palisades, NY","active":true,"usgs":false},{"id":27331,"text":"Duke University, Durham, NC","active":true,"usgs":false}],"preferred":false,"id":439637,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hutton, E. W. H.","contributorId":20940,"corporation":false,"usgs":true,"family":"Hutton","given":"E.","email":"","middleInitial":"W. H.","affiliations":[],"preferred":false,"id":439631,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kettner, A.J.","contributorId":26521,"corporation":false,"usgs":true,"family":"Kettner","given":"A.J.","affiliations":[],"preferred":false,"id":439632,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Syvitski, J.P.M.","contributorId":91222,"corporation":false,"usgs":true,"family":"Syvitski","given":"J.P.M.","email":"","affiliations":[],"preferred":false,"id":439636,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hill, P.S.","contributorId":48683,"corporation":false,"usgs":true,"family":"Hill","given":"P.S.","email":"","affiliations":[],"preferred":false,"id":439634,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"George, D.A.","contributorId":43897,"corporation":false,"usgs":true,"family":"George","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":439633,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Milligan, T.G.","contributorId":87366,"corporation":false,"usgs":true,"family":"Milligan","given":"T.G.","email":"","affiliations":[],"preferred":false,"id":439635,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70033053,"text":"70033053 - 2007 - SHRIMP U-Pb evidence for a Late Silurian age of metasedimentary rocks in the Merrimack and Putnam-Nashoba terranes, eastern New England","interactions":[],"lastModifiedDate":"2012-03-12T17:21:39","indexId":"70033053","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":732,"text":"American Journal of Science","active":true,"publicationSubtype":{"id":10}},"title":"SHRIMP U-Pb evidence for a Late Silurian age of metasedimentary rocks in the Merrimack and Putnam-Nashoba terranes, eastern New England","docAbstract":"U-Pb ages of detrital, metamorphic, and magmatic zircon and metamorphic monazite and titanite provide evidence for the ages of deposition and metamorphism of metasedimentary rocks from the Merrimack and Putnam-Nashoba terranes of eastern New England. Rocks from these terranes are interpreted here as having been deposited in the middle Paleozoic above Neoproterozoic basement of the Gander terrane and juxtaposed by Late Paleozoic thrusting in thin, fault-bounded slices. The correlative Hebron and Berwick formations (Merrimack terrane) and Tatnic Hill Formation (Putnam-Nashoba terrane), contain detrital zircons with Mesoproterozoic, Ordovician, and Silurian age populations. On the basis of the age of the youngest detrital zircon population (???425 Ma), the Hebron, Berwick and Tatnic Hill formations are no older than Late Silurian (Wenlockian). The minimum deposition ages of the Hebron and Berwick are constrained by ages of cross-cutting plutons (414 ?? 3 and 418 ?? 2 Ma, respectively). The Tatnic Hill Formation must be older than the oldest metamorphic monazite and zircon (???407 Ma). Thus, all three of these units were deposited between ???425 and 418 Ma, probably in the Ludlovian. Age populations of detrital zircons suggest Laurentian and Ordovician arc provenance to the west. High grade metamorphism of the Tatnic Hill Formation soon after deposition probably requires that sedimentation and burial occurred in a fore-arc environment, whereas time-equivalent calcareous sediments of the Hebron and Berwick formations probably originated in a back-arc setting. In contrast to age data from the Berwick Formation, the Kittery Formation contains primarily Mesoproterozoic detrital zircons; only 2 younger grains were identified. The absence of a significant Ordovician population, in addition to paleocurrent directions from the east and structural data indicating thrusting, suggest that the Kittery was derived from peri-Gondwanan sources and deposited in the Fredericton Sea. Thus, the Kittery should not be considered part of the Laurentian-derived Merrimack terrane; it more likely correlates with the early Silurian Fredericton terrane of northeastern New England and Maritime Canada.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Journal of Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2475/01.2007.05","issn":"00029599","usgsCitation":"Wintsch, R., Aleinikoff, J.N., Walsh, G., Bothner, W.A., Hussey, A., and Fanning, C., 2007, SHRIMP U-Pb evidence for a Late Silurian age of metasedimentary rocks in the Merrimack and Putnam-Nashoba terranes, eastern New England: American Journal of Science, v. 307, no. 1, p. 119-167, https://doi.org/10.2475/01.2007.05.","startPage":"119","endPage":"167","numberOfPages":"49","costCenters":[],"links":[{"id":476967,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://hdl.handle.net/1885/28000","text":"External Repository"},{"id":213180,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2475/01.2007.05"},{"id":240779,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"307","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-05-11","publicationStatus":"PW","scienceBaseUri":"505aaf46e4b0c8380cd874c0","contributors":{"authors":[{"text":"Wintsch, R. P.","contributorId":104921,"corporation":false,"usgs":false,"family":"Wintsch","given":"R. P.","affiliations":[{"id":13366,"text":"Indiana University, Bloomington, Indiana, USA","active":true,"usgs":false}],"preferred":false,"id":439176,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Aleinikoff, J. N. 0000-0003-3494-6841","orcid":"https://orcid.org/0000-0003-3494-6841","contributorId":75132,"corporation":false,"usgs":true,"family":"Aleinikoff","given":"J.","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":439172,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Walsh, G. J. 0000-0003-4264-8836","orcid":"https://orcid.org/0000-0003-4264-8836","contributorId":47409,"corporation":false,"usgs":true,"family":"Walsh","given":"G. J.","affiliations":[],"preferred":false,"id":439171,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bothner, Wallace A.","contributorId":80270,"corporation":false,"usgs":true,"family":"Bothner","given":"Wallace","email":"","middleInitial":"A.","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":439173,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hussey, A. M.","contributorId":95691,"corporation":false,"usgs":false,"family":"Hussey","given":"A. M.","affiliations":[],"preferred":false,"id":439175,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Fanning, C.M.","contributorId":82434,"corporation":false,"usgs":true,"family":"Fanning","given":"C.M.","email":"","affiliations":[],"preferred":false,"id":439174,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70033055,"text":"70033055 - 2007 - Global impacts of conversions from natural to agricultural ecosystems on water resources: Quantity versus quality","interactions":[],"lastModifiedDate":"2018-04-03T13:12:05","indexId":"70033055","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Global impacts of conversions from natural to agricultural ecosystems on water resources: Quantity versus quality","docAbstract":"

Past land use changes have greatly impacted global water resources, with often opposing effects on water quantity and quality. Increases in rain‐fed cropland (460%) and pastureland (560%) during the past 300 years from forest and grasslands decreased evapotranspiration and increased recharge (two orders of magnitude) and streamflow (one order of magnitude). However, increased water quantity degraded water quality by mobilization of salts, salinization caused by shallow water tables, and fertilizer leaching into underlying aquifers that discharge to streams. Since the 1950s, irrigated agriculture has expanded globally by 174%, accounting for ∼90% of global freshwater consumption. Irrigation based on surface water reduced streamflow and raised water tables resulting in waterlogging in many areas (China, India, and United States). Marked increases in groundwater‐fed irrigation in the last few decades in these areas has lowered water tables (≤1 m/yr) and reduced streamflow. Degradation of water quality in irrigated areas has resulted from processes similar to those in rain‐fed agriculture: salt mobilization, salinization in waterlogged areas, and fertilizer leaching. Strategies for remediating water resource problems related to agriculture often have opposing effects on water quantity and quality. Long time lags (decades to centuries) between land use changes and system response (e.g., recharge, streamflow, and water quality), particularly in semiarid regions, mean that the full impact of land use changes has not been realized in many areas and remediation to reverse impacts will also take a long time. Future land use changes should consider potential impacts on water resources, particularly trade‐offs between water, salt, and nutrient balances, to develop sustainable water resources to meet human and ecosystem needs.

","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006WR005486","usgsCitation":"Scanlon, B., Jolly, I., Sophocleous, M., and Zhang, L., 2007, Global impacts of conversions from natural to agricultural ecosystems on water resources: Quantity versus quality: Water Resources Research, v. 43, no. 3, Article W03437; 18 p., https://doi.org/10.1029/2006WR005486.","productDescription":"Article W03437; 18 p.","costCenters":[],"links":[{"id":476966,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006wr005486","text":"Publisher Index Page"},{"id":240846,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-03-27","publicationStatus":"PW","scienceBaseUri":"505a294be4b0c8380cd5a821","contributors":{"authors":[{"text":"Scanlon, Bridget R.","contributorId":74093,"corporation":false,"usgs":true,"family":"Scanlon","given":"Bridget R.","affiliations":[],"preferred":false,"id":439184,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jolly, Ian","contributorId":56859,"corporation":false,"usgs":false,"family":"Jolly","given":"Ian","email":"","affiliations":[],"preferred":false,"id":439183,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sophocleous, Marios","contributorId":77673,"corporation":false,"usgs":true,"family":"Sophocleous","given":"Marios","affiliations":[],"preferred":false,"id":439181,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Zhang, Lu","contributorId":105238,"corporation":false,"usgs":true,"family":"Zhang","given":"Lu","email":"","affiliations":[],"preferred":false,"id":439182,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70032733,"text":"70032733 - 2007 - Effect of glyphosate rate and spray volume on control of giant Salvinia","interactions":[],"lastModifiedDate":"2012-03-12T17:21:23","indexId":"70032733","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2180,"text":"Journal of Aquatic Plant Management","active":true,"publicationSubtype":{"id":10}},"title":"Effect of glyphosate rate and spray volume on control of giant Salvinia","docAbstract":"[No abstract available]","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Aquatic Plant Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"01466623","usgsCitation":"Nelson, L., Glomski, L., and Gladwin, D., 2007, Effect of glyphosate rate and spray volume on control of giant Salvinia: Journal of Aquatic Plant Management, v. 45, no. JAN., p. 58-61.","startPage":"58","endPage":"61","numberOfPages":"4","costCenters":[],"links":[{"id":241601,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"JAN.","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a05e3e4b0c8380cd50fe8","contributors":{"authors":[{"text":"Nelson, L.S.","contributorId":97714,"corporation":false,"usgs":true,"family":"Nelson","given":"L.S.","email":"","affiliations":[],"preferred":false,"id":437670,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Glomski, L.M.","contributorId":107110,"corporation":false,"usgs":true,"family":"Glomski","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":437671,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gladwin, D.N.","contributorId":40562,"corporation":false,"usgs":true,"family":"Gladwin","given":"D.N.","email":"","affiliations":[],"preferred":false,"id":437669,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70033050,"text":"70033050 - 2007 - Solar forcing of Gulf of California climate during the past 2000 yr suggested by diatoms and silicoflagellates","interactions":[],"lastModifiedDate":"2023-10-06T11:57:48.507091","indexId":"70033050","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2673,"text":"Marine Micropaleontology","active":true,"publicationSubtype":{"id":10}},"title":"Solar forcing of Gulf of California climate during the past 2000 yr suggested by diatoms and silicoflagellates","docAbstract":"

High-resolution records of the past 2000 yr are compared in a north–south transect (28° N to 24° N) of three cores from the eastern slopes of the Guaymas, Carmen, and Pescadero Basins of the Gulf of California (hereafter referred to as the “Gulf”). Evenly-spaced samples from the varved sediments in each core allow sample resolution ranging from ∼ 16 to ∼ 37 yr.

Diatoms and silicoflagellates capture the seasonal variation between a late fall to early spring period of high biosiliceous productivity, that is driven by northwest winds, and a summer period of warmer, more stratified waters during which these winds slacken and/or reverse direction (monsoonal flow). As these winds decrease, tropical waters enter the Gulf and spread northward. Individual samples represent a composite of 7 to 23 yr of deposition and are assumed to record the relative dominance of the winter vs. summer floral components.

Intervals of enhanced summer incursion of tropical waters, alternating with periods of increased late fall to early spring biosiliceous productivity are recorded in all three cores. Regularly spaced cycles (∼ 100 yr duration) of Octactis pulchra, a silicoflagellate proxy for lower SST and high productivity, and Azpeitia nodulifera, a tropical diatom, occur between ∼ A.D. 400 and ∼ 1700 in the more nearshore Carmen Basin core, NH01-21 (26.3° N), suggesting a possible solar influence on coastal upwelling.

Cores BAM80 E-17 (27.9° N) and NH01-26 (24.3° N) contain longer-duration cycles of diatoms and silicoflagellates. The early part of Medieval Climate Anomaly (∼ A.D. 900 to 1200) is characterized by two periods of reduced productivity (warmer SST) with an intervening high productivity (cool) interval centered at ∼ A.D. 1050. Reduced productivity and higher SST also characterize the record of the last ∼ 100 to 200 yr in these cores. Solar variability appears to be driving productivity cycles, as intervals of increased radiocarbon production (sunspot minima) correlate with intervals of enhanced productivity. It is proposed that increased winter cooling of the atmosphere above southwest U.S. during sunspot minima causes intensification of the northwest winds that blow down the Gulf during the late fall to early spring, leading to intensified overturn of surface waters and enhanced productivity.

A new silicoflagellate species, Dictyocha franshepardii Bukry, is described and illustrated.

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2007 - Risk-targeted versus current seismic design maps for the conterminous United States","interactions":[],"lastModifiedDate":"2018-02-16T10:16:04","indexId":"70045059","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Risk-targeted versus current seismic design maps for the conterminous United States","docAbstract":"The probabilistic portions of the seismic design maps in the NEHRP Provisions (FEMA, 2003/2000/1997), and in the International Building Code (ICC, 2006/2003/2000) and ASCE Standard 7-05 (ASCE, 2005a), provide ground motion values from the USGS that have a 2% probability of being exceeded in 50 years. 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In support of the 2009 update of the NEHRP Provisions currently being conducted by the Building Seismic Safety Council (BSSC), herein we provide examples of the adjusted ground motions for a selected target collapse probability (or target risk). 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