We present the first comprehensive late Quaternary record of North American Great Plains temperature by assessing the behavior of the stable isotopic composition (δ13C) of buried soils. After examining the relationship between the δ13C of topsoil organic matter and July temperature from 61 native prairies within a latitudinal range of 46°–38°N, we applied the resulting regression equation to 64 published δ13C values from buried soils of the same region to construct a temperature curve for the past 12 k.y. Estimated temperatures from 12 to 10 ka (1 k.y. = 1000 14C yr B.P.) fluctuated with a periodicity of ∼1 k.y. with two cool excursions between −4.5 and −3.5 °C and two warmer excursions between −1 and 0 °C, relative to modern. Early Holocene temperatures from ca. 10–7.5 ka were −1.0 to −2.0 °C before rising to +1.0 °C in the middle Holocene between 6.0 and 4.5 ka. After a cool interlude from 4.2 to 2.6 ka, when temperatures dropped to slightly below modern, another warm interval ensued from 2.6 to 1 ka as temperatures increased to ∼+0.5 °C. A final decline in temperature to below modern occurred beginning ca. 0.5 ka. Cooler than present temperatures in the Great Plains indicate telecommunications with cool-water episodes in the Gulf of Mexico and North Atlantic potentially governed by a combination of glacial meltwater pulses and low solar irradiance.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/G23345A.1","issn":"00917613","usgsCitation":"Nordt, L., Von Fischer, J., and Tieszen, L., 2007, Late quaternary temperature record from buried soils of the North American Great Plains: Geology, v. 35, no. 2, p. 159-162, https://doi.org/10.1130/G23345A.1.","productDescription":"4 p.","startPage":"159","endPage":"162","numberOfPages":"4","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":241005,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213384,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/G23345A.1"}],"volume":"35","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4559e4b0c8380cd6723e","contributors":{"authors":[{"text":"Nordt, L.","contributorId":65207,"corporation":false,"usgs":true,"family":"Nordt","given":"L.","email":"","affiliations":[],"preferred":false,"id":438738,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Von Fischer, J.","contributorId":77277,"corporation":false,"usgs":true,"family":"Von Fischer","given":"J.","affiliations":[],"preferred":false,"id":438739,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tieszen, L.","contributorId":22887,"corporation":false,"usgs":true,"family":"Tieszen","given":"L.","email":"","affiliations":[],"preferred":false,"id":438737,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70032965,"text":"70032965 - 2007 - DIN retention-transport through four hydrologically connected zones in a headwater catchment of the Upper Mississippi River","interactions":[],"lastModifiedDate":"2023-10-06T11:10:47.274618","indexId":"70032965","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"DIN retention-transport through four hydrologically connected zones in a headwater catchment of the Upper Mississippi River","docAbstract":"Dissolved inorganic nitrogen (DIN) retention-transport through a headwater catchment was synthesized from studies encompassing four distinct hydrologic zones of the Shingobee River Headwaters near the origin of the Mississippi River. The hydrologic zones included: (1) hillslope ground water (ridge to bankside riparian); (2) alluvial riparian ground water; (3) ground water discharged through subchannel sediments (hyporheic zone); and (4) channel surface water. During subsurface hillslope transport through Zone 1, DIN, primarily nitrate, decreased from ∼3 mg-N/l to <0.1 mg-N/l. Ambient seasonal nitrate:chloride ratios in hillslope flow paths indicated both dilution and biotic processing caused nitrate loss. Biologically available organic carbon controlled biotic nitrate retention during hillslope transport. In the alluvial riparian zone (Zone 2) biologically available organic carbon controlled nitrate depletion although processing of both ambient and amended nitrate was faster during the summer than winter. In the hyporheic zone (Zone 3) and stream surface water (Zone 4) DIN retention was primarily controlled by temperature. Perfusion core studies using hyporheic sediment indicated sufficient organic carbon in bed sediments to retain ground water DIN via coupled nitrification-denitrification. Numerical simulations of seasonal hyporheic sediment nitrification-denitrification rates from perfusion cores adequately predicted surface water ammonium but not nitrate when compared to 5 years of monthly field data (1989-93). Mass balance studies in stream surface water indicated proportionally higher summer than winter N retention. Watershed DIN retention was effective during summer under the current land use of intermittently grazed pasture. However, more intensive land use such as row crop agriculture would decrease nitrate retention efficiency and increase loads to surface water. Understanding DIN retention capacity throughout the system, including special channel features such as sloughs, wetlands and floodplains that provide surface water-ground water connectivity, will be required to develop effective nitrate management strategies.
Anaplasma ovis (Rickettsiales: Anaplasmataceae) is a tick-borne pathogen of sheep, goats and wild ruminants. The genetic diversity of A. ovis strains has not been well characterized due to the lack of sequence information. In this study, we evaluated bighorn sheep (Ovis canadensis) and mule deer (Odocoileus hemionus) from Montana for infection with A. ovis by serology and sequence analysis of the msp4 gene. Antibodies to Anaplasma spp. were detected in 37% and 39% of bighorn sheep and mule deer analyzed, respectively. Four new msp4 genotypes were identified. The A. ovis msp4 sequences identified herein were analyzed together with sequences reported previously for the characterization of the genetic diversity of A. ovis strains in comparison with other Anaplasma spp. The results of these studies demonstrated that although A. ovis msp4 genotypes may vary among geographic regions and between sheep and deer hosts, the variation observed was less than the variation observed between A. marginale and A. phagocytophilum strains. The results reported herein further confirm that A. ovis infection occurs in natural wild ruminant populations in Western United States and that bighorn sheep and mule deer may serve as wildlife reservoirs of A. ovis. ?? 2006.
","language":"English","publisher":"Elselvier","doi":"10.1016/j.vetmic.2006.09.011","issn":"03781135","usgsCitation":"de la Fuente, J., Atkinson, M., Naranjo, V., Fernandez de Mera, I.G., Mangold, A., Keating, K., and Kocan, K.M., 2007, Sequence analysis of the msp4 gene of Anaplasma ovis strains: Veterinary Microbiology, v. 119, no. 2-4, p. 375-381, https://doi.org/10.1016/j.vetmic.2006.09.011.","productDescription":"7 p.","startPage":"375","endPage":"381","numberOfPages":"7","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":213160,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.vetmic.2006.09.011"},{"id":240757,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"119","issue":"2-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8d47e4b08c986b318314","contributors":{"authors":[{"text":"de la Fuente, J.","contributorId":76922,"corporation":false,"usgs":true,"family":"de la Fuente","given":"J.","affiliations":[],"preferred":false,"id":439892,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Atkinson, M.W.","contributorId":41224,"corporation":false,"usgs":true,"family":"Atkinson","given":"M.W.","email":"","affiliations":[],"preferred":false,"id":439887,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Naranjo, V.","contributorId":43175,"corporation":false,"usgs":true,"family":"Naranjo","given":"V.","email":"","affiliations":[],"preferred":false,"id":439889,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fernandez de Mera, I. G.","contributorId":78158,"corporation":false,"usgs":true,"family":"Fernandez de Mera","given":"I.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":439893,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mangold, A.J.","contributorId":62838,"corporation":false,"usgs":true,"family":"Mangold","given":"A.J.","email":"","affiliations":[],"preferred":false,"id":439891,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Keating, K.A.","contributorId":44500,"corporation":false,"usgs":true,"family":"Keating","given":"K.A.","email":"","affiliations":[],"preferred":false,"id":439890,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Kocan, K. M.","contributorId":41779,"corporation":false,"usgs":true,"family":"Kocan","given":"K.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":439888,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"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.
","language":"English","publisher":"Elsevier","doi":"10.1016/j.marmicro.2006.08.003","issn":"03778398","usgsCitation":"Barron, J.A., and Bukry, D., 2007, Solar forcing of Gulf of California climate during the past 2000 yr suggested by diatoms and silicoflagellates: Marine Micropaleontology, v. 62, no. 2, p. 115-139, https://doi.org/10.1016/j.marmicro.2006.08.003.","productDescription":"25 p.","startPage":"115","endPage":"139","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":240713,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States, Mexico","state":"California","otherGeospatial":"Gulf of California","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -107.40234375,\n 24.287026865376436\n ],\n [\n -109.00634765625,\n 25.58208527870072\n ],\n [\n -109.48974609375,\n 25.819671943904044\n ],\n [\n -109.22607421875,\n 26.27371402440643\n ],\n [\n -109.4677734375,\n 26.686729520004036\n ],\n [\n -109.8193359375,\n 26.745610382199022\n ],\n [\n -109.9951171875,\n 27.00040800352175\n ],\n [\n -110.63232421875,\n 27.332735136859146\n ],\n [\n -110.5224609375,\n 27.800209937418252\n ],\n [\n -110.9619140625,\n 27.89734922968426\n ],\n [\n -111.42333984375,\n 28.22697003891834\n ],\n [\n -112.12646484375,\n 28.806173508854776\n ],\n [\n -112.4560546875,\n 29.49698759653577\n ],\n [\n -113.0712890625,\n 30.600093873550072\n ],\n [\n -113.09326171875,\n 31.203404950917395\n ],\n [\n -113.75244140624999,\n 31.541089879585808\n ],\n [\n -114.169921875,\n 31.484893386890164\n ],\n [\n -114.7412109375,\n 31.690781806136822\n ],\n [\n -114.873046875,\n 31.052933985705163\n ],\n [\n -114.67529296874999,\n 30.44867367928756\n ],\n [\n -114.6533203125,\n 29.954934549656144\n ],\n [\n -114.0380859375,\n 29.53522956294847\n ],\n [\n -113.02734374999999,\n 28.51696944040106\n ],\n [\n -112.69775390625,\n 27.68352808378776\n ],\n [\n -112.2802734375,\n 27.332735136859146\n ],\n [\n -111.884765625,\n 26.88288045572338\n ],\n [\n -111.33544921874999,\n 26.37218544169559\n ],\n [\n -111.3134765625,\n 25.819671943904044\n ],\n [\n -110.72021484375,\n 24.84656534821976\n ],\n [\n -110.654296875,\n 24.246964554300924\n ],\n [\n -110.23681640625,\n 24.347096633808512\n ],\n [\n -109.70947265625,\n 23.725011735951796\n ],\n [\n -109.2919921875,\n 23.28171917560002\n ],\n [\n -107.40234375,\n 24.287026865376436\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"62","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9235e4b08c986b319d7a","contributors":{"authors":[{"text":"Barron, John A. 0000-0002-9309-1145 jbarron@usgs.gov","orcid":"https://orcid.org/0000-0002-9309-1145","contributorId":2222,"corporation":false,"usgs":true,"family":"Barron","given":"John","email":"jbarron@usgs.gov","middleInitial":"A.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":439129,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bukry, David 0000-0003-4540-890X","orcid":"https://orcid.org/0000-0003-4540-890X","contributorId":30980,"corporation":false,"usgs":true,"family":"Bukry","given":"David","affiliations":[],"preferred":false,"id":439128,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70033188,"text":"70033188 - 2007 - Seismoelectric imaging of shallow targets","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70033188","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1808,"text":"Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"Seismoelectric imaging of shallow targets","docAbstract":"We have undertaken a series of controlled field experiments to develop seismoelectric experimental methods for near-surface applications and to improve our understanding of seismoelectric phenomena. In a set of off-line geometry surveys (source separated from the receiver line), we place seismic sources and electrode array receivers on opposite sides of a man-made target (two sand-filled trenches) to record separately two previously documented seismoelectric modes: (1) the electromagnetic interface response signal created at the target and (2) the coseismic electric fields located within a compressional seismic wave. With the seismic source point in the center of a linear electrode array, we identify the previously undocumented seismoelectric direct field, and the Lorentz field of the metal hammer plate moving in the earth's magnetic field. We place the seismic source in the center of a circular array of electrodes (radial and circumferential orientations) to analyze the source-related direct and Lorentz fields and to establish that these fields can be understood in terms of simple analytical models. Using an off-line geometry, we create a multifold, 2D image of our trenches as dipping layers, and we also produce a complementary synthetic image through numerical modeling. These images demonstrate that off-line geometry (e.g., crosswell) surveys offer a particularly promising application of the seismoelectric method because they effectively separate the interface response signal from the (generally much stronger) coseismic and source-related fields. ?? 2007 Society of Exploration Geophysicists.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1190/1.2428267","issn":"00168033","usgsCitation":"Haines, S., Pride, S., Klemperer, S., and Biondi, B., 2007, Seismoelectric imaging of shallow targets: Geophysics, v. 72, no. 2, https://doi.org/10.1190/1.2428267.","costCenters":[],"links":[{"id":213159,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1190/1.2428267"},{"id":240756,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"72","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8bc9e4b08c986b317aa5","contributors":{"authors":[{"text":"Haines, S.S. 0000-0003-2611-8165","orcid":"https://orcid.org/0000-0003-2611-8165","contributorId":33402,"corporation":false,"usgs":true,"family":"Haines","given":"S.S.","affiliations":[],"preferred":false,"id":439746,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pride, S.R.","contributorId":77348,"corporation":false,"usgs":true,"family":"Pride","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":439749,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Klemperer, S.L.","contributorId":52734,"corporation":false,"usgs":true,"family":"Klemperer","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":439748,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Biondi, B.","contributorId":36368,"corporation":false,"usgs":true,"family":"Biondi","given":"B.","email":"","affiliations":[],"preferred":false,"id":439747,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70033124,"text":"70033124 - 2007 - Evaluation and comparison of gross primary production estimates for the Northern Great Plains grasslands","interactions":[],"lastModifiedDate":"2018-02-21T15:40:52","indexId":"70033124","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3254,"text":"Remote Sensing of Environment","printIssn":"0034-4257","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation and comparison of gross primary production estimates for the Northern Great Plains grasslands","docAbstract":"Two spatially-explicit estimates of gross primary production (GPP) are available for the Northern Great Plains. An empirical piecewise regression (PWR) GPP model was developed from flux tower measurements to map carbon flux across the region. The Moderate Resolution Imaging Spectrometer (MODIS) GPP model is a process-based model that uses flux tower data to calibrate its parameters. Verification and comparison of the regional PWR GPP and the global MODIS GPP are important for the modeling of grassland carbon flux. This study compared GPP estimates from PWR and MODIS models with five towers in the grasslands. Among them, PWR GPP and MODIS GPP showed a good agreement with tower-based GPP at three towers. The global MODIS GPP, however, did not agree well with tower-based GPP at two other towers, probably because of the insensitivity of MODIS model to regional ecosystem and climate change and extreme soil moisture conditions. Cross-validation indicated that the PWR model is relatively robust for predicting regional grassland GPP. However, the PWR model should include a wide variety of flux tower data as the training data sets to obtain more accurate results.
In addition, GPP maps based on the PWR and MODIS models were compared for the entire region. In the northwest and south, PWR GPP was much higher than MODIS GPP. These areas were characterized by the higher water holding capacity with a lower proportion of C4 grasses in the northwest and a higher proportion of C4 grasses in the south. In the central and southeastern regions, PWR GPP was much lower than MODIS GPP under complicated conditions with generally mixed C3/C4 grasses. The analysis indicated that the global MODIS GPP model has some limitations on detecting moisture stress, which may have been caused by the facts that C3 and C4 grasses are not distinguished, water stress is driven by vapor pressure deficit (VPD) from coarse meteorological data, and MODIS land cover data are unable to differentiate the sub-pixel cropland components.
","language":"English","publisher":"Elsevier","doi":"10.1016/j.rse.2006.08.012","issn":"00344257","usgsCitation":"Zhang, L., Wylie, B.K., Loveland, T.R., Fosnight, E.A., Tieszen, L.L., Ji, L., and Gilmanov, T., 2007, Evaluation and comparison of gross primary production estimates for the Northern Great Plains grasslands: Remote Sensing of Environment, v. 106, no. 2, p. 173-189, https://doi.org/10.1016/j.rse.2006.08.012.","productDescription":"17 p.","startPage":"173","endPage":"189","numberOfPages":"17","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":240817,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213213,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.rse.2006.08.012"}],"volume":"106","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0c05e4b0c8380cd529d7","contributors":{"authors":[{"text":"Zhang, Li","contributorId":98139,"corporation":false,"usgs":true,"family":"Zhang","given":"Li","affiliations":[],"preferred":false,"id":439467,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wylie, Bruce K. 0000-0002-7374-1083 wylie@usgs.gov","orcid":"https://orcid.org/0000-0002-7374-1083","contributorId":750,"corporation":false,"usgs":true,"family":"Wylie","given":"Bruce","email":"wylie@usgs.gov","middleInitial":"K.","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true},{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"preferred":true,"id":439469,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Loveland, Thomas R. 0000-0003-3114-6646 loveland@usgs.gov","orcid":"https://orcid.org/0000-0003-3114-6646","contributorId":140256,"corporation":false,"usgs":true,"family":"Loveland","given":"Thomas","email":"loveland@usgs.gov","middleInitial":"R.","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":false,"id":439471,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fosnight, Eugene A. 0000-0002-8557-3697 fosnight@usgs.gov","orcid":"https://orcid.org/0000-0002-8557-3697","contributorId":2961,"corporation":false,"usgs":true,"family":"Fosnight","given":"Eugene","email":"fosnight@usgs.gov","middleInitial":"A.","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":true,"id":439468,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Tieszen, Larry L. tieszen@usgs.gov","contributorId":2831,"corporation":false,"usgs":true,"family":"Tieszen","given":"Larry","email":"tieszen@usgs.gov","middleInitial":"L.","affiliations":[],"preferred":true,"id":439466,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Ji, Lei 0000-0002-6133-1036 lji@usgs.gov","orcid":"https://orcid.org/0000-0002-6133-1036","contributorId":2832,"corporation":false,"usgs":true,"family":"Ji","given":"Lei","email":"lji@usgs.gov","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":false,"id":439472,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Gilmanov, Tagir","contributorId":6351,"corporation":false,"usgs":true,"family":"Gilmanov","given":"Tagir","affiliations":[],"preferred":false,"id":439470,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70033123,"text":"70033123 - 2007 - Physical and temporal isolation of mountain headwater streams in the western Mojave Desert, Southern California","interactions":[],"lastModifiedDate":"2012-03-12T17:21:34","indexId":"70033123","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"Physical and temporal isolation of mountain headwater streams in the western Mojave Desert, Southern California","docAbstract":"Streams draining mountain headwater areas of the western Mojave Desert are commonly physically isolated from downstream hydrologic systems such as springs, playa lakes, wetlands, or larger streams and rivers by stream reaches that are dry much of the time. The physical isolation of surface flow in these streams may be broken for brief periods after rainfall or snowmelt when runoff is sufficient to allow flow along the entire stream reach. Despite the physical isolation of surface flow in these streams, they are an integral part of the hydrologic cycle. Water infiltrated from headwater streams moves through the unsaturated zone to recharge the underlying ground-water system and eventually discharges to support springs, streamflow, isolated wetlands, or native vegetation. Water movement through thick unsaturated zones may require several hundred years and subsequent movement through the underlying ground-water systems may require many thousands of years - contributing to the temporal isolation of mountain headwater streams. ?? 2007 American Water Resources Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of the American Water Resources Association","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1752-1688.2007.00004.x","issn":"1093474X","usgsCitation":"Izbicki, J., 2007, Physical and temporal isolation of mountain headwater streams in the western Mojave Desert, Southern California: Journal of the American Water Resources Association, v. 43, no. 1, p. 26-40, https://doi.org/10.1111/j.1752-1688.2007.00004.x.","startPage":"26","endPage":"40","numberOfPages":"15","costCenters":[],"links":[{"id":240784,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213184,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1752-1688.2007.00004.x"}],"volume":"43","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-26","publicationStatus":"PW","scienceBaseUri":"505a7a91e4b0c8380cd78f94","contributors":{"authors":[{"text":"Izbicki, J. A. 0000-0003-0816-4408","orcid":"https://orcid.org/0000-0003-0816-4408","contributorId":28244,"corporation":false,"usgs":true,"family":"Izbicki","given":"J. A.","affiliations":[],"preferred":false,"id":439465,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70033122,"text":"70033122 - 2007 - A field test of the centrifugal community organization model using psammophilic gerbils in Israel's southern coastal plain","interactions":[],"lastModifiedDate":"2012-03-12T17:21:34","indexId":"70033122","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1604,"text":"Evolutionary Ecology Research","active":true,"publicationSubtype":{"id":10}},"title":"A field test of the centrifugal community organization model using psammophilic gerbils in Israel's southern coastal plain","docAbstract":"Background: An optimal habitat selection model called centrifugal community organization (CCO) predicts that species, although they have the same primary habitat, may co-exist owing to their ability to use different secondary habitats. Goal: Test the predictions of CCO with field experiments. Species: The Egyptian sand gerbil (40 g), Gerbillus pyramidum, and Allenby's gerbil (25 g), G. andersoni allenbyi. Site: Ashdod sand dunes in the southern coastal plain of Israel. Three sandy habitats are present: shifting, semi-stabilized, and stabilized sand. Gerbils occupied all three habitats. Methods: We surveyed rodent abundance, activity levels, and foraging behaviour while experimentally removing G. pyramidum. Results: Three predictions of the CCO model were supported. Both species did best in the semi-stabilized habitat. However, they differed in their secondary habitats. Gerbillus pyramidum preferred the shifting sand habitat, whereas G. a. allenbyi preferred the stabilized habitat. Habitat selection by both species depended on density. However, in contrast to CCO, G. pyramidum dominated the core habitat and excluded G. a. allenbyi. We term this variant of CCO, 'asymmetric CCO'. Conclusions: The fundamental feature of CCO appears valid: co-existence may result not because of what each competing species does best, but because of what they do as a back-up. But in contrast to the prediction of the original CCO model, all dynamic traces of interaction can vanish if the system includes interference competition. ?? 2007 Gideon Wasserberg.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Evolutionary Ecology Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"15220613","usgsCitation":"Wasserberg, G., Kotler, B., Morris, D., and Abramsky, Z., 2007, A field test of the centrifugal community organization model using psammophilic gerbils in Israel's southern coastal plain: Evolutionary Ecology Research, v. 9, no. 2, p. 299-311.","startPage":"299","endPage":"311","numberOfPages":"13","costCenters":[],"links":[{"id":240783,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"9","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e3d7e4b0c8380cd46256","contributors":{"authors":[{"text":"Wasserberg, Gideon","contributorId":31185,"corporation":false,"usgs":true,"family":"Wasserberg","given":"Gideon","email":"","affiliations":[],"preferred":false,"id":439461,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kotler, B.P.","contributorId":33908,"corporation":false,"usgs":true,"family":"Kotler","given":"B.P.","affiliations":[],"preferred":false,"id":439462,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Morris, D.W.","contributorId":94078,"corporation":false,"usgs":true,"family":"Morris","given":"D.W.","email":"","affiliations":[],"preferred":false,"id":439464,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Abramsky, Z.","contributorId":88928,"corporation":false,"usgs":true,"family":"Abramsky","given":"Z.","email":"","affiliations":[],"preferred":false,"id":439463,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"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":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":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":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":70033121,"text":"70033121 - 2007 - Home range characteristics of Mexican Spotted Owls in the canyonlands of Utah","interactions":[],"lastModifiedDate":"2017-11-25T13:53:18","indexId":"70033121","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2442,"text":"Journal of Raptor Research","active":true,"publicationSubtype":{"id":10}},"title":"Home range characteristics of Mexican Spotted Owls in the canyonlands of Utah","docAbstract":"We studied home-range characteristics of adult Mexican Spotted Owls (Strix occidentalis lucida) in southern Utah. Twenty-eight adult owls were radio-tracked using a ground-based telemetry system during 1991-95. Five males and eight females molted tail feathers and dropped transmitters within 4 wk. We estimated cumulative home ranges for 15 Spotted Owls (12 males, 3 females). The mean estimate of cumulative home-range size was not statistically different between the minimum convex polygon and adaptive kernel (AK) 95% isopleth. Both estimators yielded relatively high SD, and male and female range sizes varied widely. For 12 owls tracked during both the breeding and nonbreeding seasons, the mean size of the AK 95% nonbreeding home range was 49% larger than the breeding home-range size. The median AK 75% bome-range isopleth (272 ha) we observed was similar in size to Protected Activity Centers (PACs) recommended by a recovery team. Our results lend support to the PAC concept and we support continued use of PACs to conserve Spotted Owl habitat in Utah. ?? 2007 The Raptor Research Foundation, Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Raptor Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.3356/0892-1016(2007)41[10:HRCOMS]2.0.CO;2","issn":"08921016","usgsCitation":"Willey, D., and van Riper, C., 2007, Home range characteristics of Mexican Spotted Owls in the canyonlands of Utah: Journal of Raptor Research, v. 41, no. 1, p. 10-15, https://doi.org/10.3356/0892-1016(2007)41[10:HRCOMS]2.0.CO;2.","startPage":"10","endPage":"15","numberOfPages":"6","costCenters":[],"links":[{"id":477164,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3356/0892-1016(2007)41[10:hrcoms]2.0.co;2","text":"Publisher Index Page"},{"id":240752,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213155,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3356/0892-1016(2007)41[10:HRCOMS]2.0.CO;2"}],"volume":"41","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3206e4b0c8380cd5e464","contributors":{"authors":[{"text":"Willey, D.W.","contributorId":19739,"corporation":false,"usgs":true,"family":"Willey","given":"D.W.","email":"","affiliations":[],"preferred":false,"id":439459,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"van Riper, Charles III 0000-0003-1084-5843 charles_van_riper@usgs.gov","orcid":"https://orcid.org/0000-0003-1084-5843","contributorId":169488,"corporation":false,"usgs":true,"family":"van Riper","given":"Charles","suffix":"III","email":"charles_van_riper@usgs.gov","affiliations":[{"id":568,"text":"Southwest Biological Science Center","active":true,"usgs":true}],"preferred":false,"id":439460,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"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":70182107,"text":"70182107 - 2007 - Near-shore and offshore habitat use by endangered, juvenile Lost River and shortnose suckers in Upper Klamath Lake, Oregon. Annual report 2004","interactions":[],"lastModifiedDate":"2017-02-16T11:33:13","indexId":"70182107","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":1,"text":"Federal Government Series"},"title":"Near-shore and offshore habitat use by endangered, juvenile Lost River and shortnose suckers in Upper Klamath Lake, Oregon. Annual report 2004","docAbstract":"No abstract available
","language":"English","publisher":"U.S. Bureau of Reclamation","usgsCitation":"Hendrixson, H., Herring, B., Burdick, S.M., and VanderKooi, S.P., 2007, Near-shore and offshore habitat use by endangered, juvenile Lost River and shortnose suckers in Upper Klamath Lake, Oregon. Annual report 2004.","costCenters":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"links":[{"id":335707,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58a6c83ae4b025c4642862be","contributors":{"authors":[{"text":"Hendrixson, H.A.","contributorId":73424,"corporation":false,"usgs":true,"family":"Hendrixson","given":"H.A.","email":"","affiliations":[],"preferred":false,"id":669622,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Herring, B.L","contributorId":177894,"corporation":false,"usgs":false,"family":"Herring","given":"B.L","email":"","affiliations":[],"preferred":false,"id":669623,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Burdick, S. M.","contributorId":78043,"corporation":false,"usgs":true,"family":"Burdick","given":"S.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":669624,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"VanderKooi, S. P.","contributorId":12587,"corporation":false,"usgs":true,"family":"VanderKooi","given":"S.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":669625,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70032923,"text":"70032923 - 2007 - Ecological linkages between headwaters and downstream ecosystems: Transport of organic matter, invertebrates, and wood down headwater channels","interactions":[],"lastModifiedDate":"2012-03-12T17:21:37","indexId":"70032923","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"Ecological linkages between headwaters and downstream ecosystems: Transport of organic matter, invertebrates, and wood down headwater channels","docAbstract":"Headwater streams make up a large proportion of the total length and watershed area of fluvial networks, and are partially characterized by the large volume of organic matter (large wood, detritus, and dissolved organic matter) and invertebrate inputs from the riparian forest, relative to stream size. Much of those inputs are exported to downstream reaches through time where they potentially subsidize river communities. The relative rates, timing, and conversion processes that carry inputs from small streams to downstream reaches are reasonably well quantified. For example, larger particles are converted to smaller particles, which are more easily exported. Also, dissolved organic matter and surface biofilms are converted to larger particles which can be more easily intercepted by consumers. However, the quality of these materials as it affects biological activity downstream is not well known, nor is the extent to which timing permits biological use of those particles. These ecological unknowns need to be resolved. Further, land uses may disrupt and diminish material transport to downstream reaches by removing sources (e.g., forest harvest), by affecting transport and decomposition processes (e.g., flow regulation, irrigation, changes in biotic communities), and by altering mechanisms of storage within headwaters (e.g., channelization). We present conceptual models of energy and nutrient fluxes that outline small stream processes and pathways important to downstream communities, and we identify informational gaps that, if filled, could significantly advance the understanding of linkages between headwater streams and larger rivers. The models, based on empirical evidence and best professional judgment, suggest that navigable waters are significantly influenced by headwater streams through hydrological and ecological connectivities, and land use can dramatically influence these natural connectivities, impacting downstream riverine ecosystems. ?? 2007 American Water Resources Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of the American Water Resources Association","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1752-1688.2007.00007.x","issn":"1093474X","usgsCitation":"Wipfli, M., Richardson, J., and Naiman, R., 2007, Ecological linkages between headwaters and downstream ecosystems: Transport of organic matter, invertebrates, and wood down headwater channels: Journal of the American Water Resources Association, v. 43, no. 1, p. 72-85, https://doi.org/10.1111/j.1752-1688.2007.00007.x.","startPage":"72","endPage":"85","numberOfPages":"14","costCenters":[],"links":[{"id":213232,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1752-1688.2007.00007.x"},{"id":240837,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-26","publicationStatus":"PW","scienceBaseUri":"505a0558e4b0c8380cd50d78","contributors":{"authors":[{"text":"Wipfli, M.S.","contributorId":51963,"corporation":false,"usgs":true,"family":"Wipfli","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":438540,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Richardson, J.S.","contributorId":80642,"corporation":false,"usgs":true,"family":"Richardson","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":438541,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Naiman, R.J.","contributorId":14354,"corporation":false,"usgs":true,"family":"Naiman","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":438539,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70033578,"text":"70033578 - 2007 - Organic contaminants in onsite wastewater treatment systems","interactions":[],"lastModifiedDate":"2012-03-12T17:21:33","indexId":"70033578","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Organic contaminants in onsite wastewater treatment systems","docAbstract":"Wastewater from thirty onsite wastewater treatment systems was sampled during a reconnaissance field study to quantify bulk parameters and the occurrence of organic wastewater contaminants including endocrine disrupting compounds in treatment systems representing a variety of wastewater sources and treatment processes and their receiving environments. Bulk parameters ranged in concentrations representative of the wide variety of wastewater sources (residential vs. non-residential). Organic contaminants such as sterols, surfactant metabolites, antimicrobial agents, stimulants, metal-chelating agents, and other consumer product chemicals, measured by gas chromatography/mass spectrometry were detected frequently in onsite system wastewater. Wastewater composition was unique between source type likely due to differences in source water and chemical usage. Removal efficiencies varied by engineered treatment type and physicochemical properties of the contaminant, resulting in discharge to the soil treatment unit at ecotoxicologically-relevant concentrations. Organic wastewater contaminants were detected less frequently and at lower concentrations in onsite system receiving environments. Understanding the occurrence and fate of organic wastewater contaminants in onsite wastewater treatment systems will aid in minimizing risk to ecological and human health.","largerWorkTitle":"ASABE - Individual and Small Community Sewage Systems XI, Proceedings of the 11th National Symposium","conferenceTitle":"11th National Symposium on Individual and Small Community Sewage Systems","conferenceDate":"20 October 2007 through 24 October 2007","conferenceLocation":"Warwick, RI","language":"English","usgsCitation":"Conn, K., Siegrist, R., Barber, L.B., and Brown, G., 2007, Organic contaminants in onsite wastewater treatment systems, in ASABE - Individual and Small Community Sewage Systems XI, Proceedings of the 11th National Symposium, Warwick, RI, 20 October 2007 through 24 October 2007.","numberOfPages":"1","costCenters":[],"links":[{"id":242088,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6f9fe4b0c8380cd75bb6","contributors":{"authors":[{"text":"Conn, K.E.","contributorId":64433,"corporation":false,"usgs":true,"family":"Conn","given":"K.E.","email":"","affiliations":[],"preferred":false,"id":441515,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Siegrist, R.L.","contributorId":54005,"corporation":false,"usgs":true,"family":"Siegrist","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":441513,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Barber, L. B.","contributorId":64602,"corporation":false,"usgs":true,"family":"Barber","given":"L.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":441516,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Brown, G.K.","contributorId":62362,"corporation":false,"usgs":true,"family":"Brown","given":"G.K.","email":"","affiliations":[],"preferred":false,"id":441514,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70033606,"text":"70033606 - 2007 - Effects of habitat management treatments on plant community composition and biomass in a Montane wetland","interactions":[],"lastModifiedDate":"2020-09-10T18:58:21.304105","indexId":"70033606","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3750,"text":"Wetlands","onlineIssn":"1943-6246","printIssn":"0277-5212","active":true,"publicationSubtype":{"id":10}},"title":"Effects of habitat management treatments on plant community composition and biomass in a Montane wetland","docAbstract":"Grazing and burning are commonly applied practices that can impact the diversity and biomass of wetland plant communities. We evaluated the vegetative response of wetlands and adjacent upland grasslands to four treatment regimes (continuous idle, fall prescribed burning followed by idle, annual fall cattle grazing, and rotation of summer grazing and idle) commonly used by the U.S. Fish and Wildlife Service. Our study area was Grays Lake, a large, montane wetland in southeastern Idaho that is bordered by extensive wet meadows. We identified seven plant cover types, representing the transition from dry meadow to deep wetland habitats: mixed deep marsh, spikerush slough, Baltic rush (Juncus balticus), moist meadow, alkali, mesic meadow, and dry meadow. We compared changes in community composition and total aboveground biomass of each plant cover type between 1998, when all units had been idled for three years, and 1999 (1 yr post-treatment) and 2000 (2 yr post-treatment). Analysis using non-metric multidimensional scaling indicated that compositional changes varied among cover types, treatments, and years following treatment. Treatment-related changes in community composition were greatest in mixed deep marsh, Baltic rush, and mesic meadow. In mixed deep marsh and Baltic rush, grazing and associated trampling contributed to changes in the plant community toward more open water and aquatic species and lower dominance of Baltic rush; grazing and trampling also seemed to contribute to increased cover in mesic meadow. Changing hydrological conditions, from multiple years of high water to increasing drought, was an important factor influencing community composition and may have interacted with management treatments. Biomass differed among treatments and between years within cover types. In the wettest cover types, fall burning and grazing rotation treatments had greater negative impact on biomass than the idle treatment, but in drier cover types, summer grazing stimulated biomass production. Our results illustrate the spatial and temporal complexity of the transition between dry meadow and wetland habitats, and variable interactions among plant communities, treatments, and annual wetland conditions.
","language":"English","publisher":"Springer","doi":"10.1672/0277-5212(2007)27[570:EOHMTO]2.0.CO;2","usgsCitation":"Austin, J.E., Keough, J.R., and Pyle, W., 2007, Effects of habitat management treatments on plant community composition and biomass in a Montane wetland: Wetlands, v. 27, no. 3, p. 570-587, https://doi.org/10.1672/0277-5212(2007)27[570:EOHMTO]2.0.CO;2.","productDescription":"18 p.","startPage":"570","endPage":"587","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":241987,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Idaho","otherGeospatial":"Gray's Lake","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -111.4320945739746,\n 42.995482339084376\n ],\n [\n -111.37870788574219,\n 42.995482339084376\n ],\n [\n -111.37870788574219,\n 43.04593448499866\n ],\n [\n -111.4320945739746,\n 43.04593448499866\n ],\n [\n -111.4320945739746,\n 42.995482339084376\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"27","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a070ae4b0c8380cd51522","contributors":{"authors":[{"text":"Austin, Jane E. 0000-0001-8775-2210 jaustin@usgs.gov","orcid":"https://orcid.org/0000-0001-8775-2210","contributorId":146411,"corporation":false,"usgs":true,"family":"Austin","given":"Jane","email":"jaustin@usgs.gov","middleInitial":"E.","affiliations":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":441643,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Keough, Janet R.","contributorId":49300,"corporation":false,"usgs":true,"family":"Keough","given":"Janet","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":441645,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pyle, W.H.","contributorId":52518,"corporation":false,"usgs":true,"family":"Pyle","given":"W.H.","email":"","affiliations":[],"preferred":false,"id":441644,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70033116,"text":"70033116 - 2007 - The energy radiated by the 26 December 2004 Sumatra-Andaman earthquake estimated from 10-minute P-wave windows","interactions":[],"lastModifiedDate":"2012-03-12T17:21:23","indexId":"70033116","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"The energy radiated by the 26 December 2004 Sumatra-Andaman earthquake estimated from 10-minute P-wave windows","docAbstract":"The rupture process of the Mw 9.1 Sumatra-Andaman earthquake lasted for approximately 500 sec, nearly twice as long as the teleseismic time windows between the P and PP arrival times generally used to compute radiated energy. In order to measure the P waves radiated by the entire earthquake, we analyze records that extend from the P-wave to the S-wave arrival times from stations at distances ?? >60??. These 8- to 10-min windows contain the PP, PPP, and ScP arrivals, along with other multiply reflected phases. To gauge the effect of including these additional phases, we form the spectral ratio of the source spectrum estimated from extended windows (between TP and TS) to the source spectrum estimated from normal windows (between TP and TPP). The extended windows are analyzed as though they contained only the P-pP-sP wave group. We analyze four smaller earthquakes that occurred in the vicinity of the Mw 9.1 mainshock, with similar depths and focal mechanisms. These smaller events range in magnitude from an Mw 6.0 aftershock of 9 January 2005 to the Mw 8.6 Nias earthquake that occurred to the south of the Sumatra-Andaman earthquake on 28 March 2005. We average the spectral ratios for these four events to obtain a frequency-dependent operator for the extended windows. We then correct the source spectrum estimated from the extended records of the 26 December 2004 mainshock to obtain a complete or corrected source spectrum for the entire rupture process (???600 sec) of the great Sumatra-Andaman earthquake. Our estimate of the total seismic energy radiated by this earthquake is 1.4 ?? 1017 J. When we compare the corrected source spectrum for the entire earthquake to the source spectrum from the first ???250 sec of the rupture process (obtained from normal teleseismic windows), we find that the mainshock radiated much more seismic energy in the first half of the rupture process than in the second half, especially over the period range from 3 sec to 40 sec.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the Seismological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1785/0120050623","issn":"00371106","usgsCitation":"Choy, G.L., and Boatwright, J., 2007, The energy radiated by the 26 December 2004 Sumatra-Andaman earthquake estimated from 10-minute P-wave windows: Bulletin of the Seismological Society of America, v. 97, no. 1 A SUPPL., https://doi.org/10.1785/0120050623.","costCenters":[],"links":[{"id":241225,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213587,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120050623"}],"volume":"97","issue":"1 A SUPPL.","noUsgsAuthors":false,"publicationDate":"2007-01-01","publicationStatus":"PW","scienceBaseUri":"505babcbe4b08c986b323097","contributors":{"authors":[{"text":"Choy, G. L. 0000-0002-0217-5555","orcid":"https://orcid.org/0000-0002-0217-5555","contributorId":78322,"corporation":false,"usgs":true,"family":"Choy","given":"G.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":439440,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boatwright, J.","contributorId":87297,"corporation":false,"usgs":true,"family":"Boatwright","given":"J.","email":"","affiliations":[],"preferred":false,"id":439441,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70030850,"text":"70030850 - 2007 - The oxygen-18 isotope approach for measuring aquatic metabolism in high-productivity waters","interactions":[],"lastModifiedDate":"2018-10-16T09:13:56","indexId":"70030850","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":"The oxygen-18 isotope approach for measuring aquatic metabolism in high-productivity waters","docAbstract":"We examined the utility of δ18O2 measurements in estimating gross primary production (P), community respiration (R), and net metabolism (P : R) through diel cycles in a productive agricultural stream located in the midwestern U.S.A. Large diel swings in O2(±200 µmol L−1) were accompanied by large diel variation in δ18O2 (±10‰). Simultaneous gas transfer measurements and laboratory‐derived isotopic fractionation factors for O2during respiration (αr) were used in conjunction with the diel monitoring of O2 and δ18O2to calculate P, R, and P :R using three independent isotope‐based methods. These estimates were compared to each other and against the traditional “open‐channel diel O2‐change” technique that lacked δ18O2. A principal advantage of the δ18O2 measurements was quantification of diel variation in R, which increased by up to 30% during the day, and the diel pattern in R was variable and not necessarily predictable from assumed temperature effects on R. The P, R, and P :R estimates calculated using the isotope‐based approaches showed high sensitivity to the assumed system fractionation factor (αr). The optimum modeled ar values (0.986‐0.989) were roughly consistent with the laboratory‐derived values, but larger (i.e., less fractionation) than αr values typically reported for enzyme‐limited respiration in open water environments. Because of large diel variation in O2, P :R could not be estimated by directly applying the typical steady‐state solution to the O2 and 18O‐O2 mass balance equations in the absence of gas transfer data. Instead, our results indicate that a modified steady‐state solution (the daily mean value approach) could be used with time‐averaged O2 and δ18O2 measurements to calculate P :R independent of gas transfer. This approach was applicable under specifically defined, net heterotrophic conditions. The diel cycle of increasing daytime R and decreasing nighttime R was only partially explained by temperature variation, but could be consistent with the diel production/consumption of labile dissolved organic carbon from photosynthesis.
","language":"English","publisher":"ASLO","doi":"10.4319/lo.2007.52.4.1439","issn":"00243590","usgsCitation":"Tobias, C., Bohlke, J.K., and Harvey, J.W., 2007, The oxygen-18 isotope approach for measuring aquatic metabolism in high-productivity waters: Limnology and Oceanography, v. 52, no. 4, p. 1439-1453, https://doi.org/10.4319/lo.2007.52.4.1439.","productDescription":"15 p.","startPage":"1439","endPage":"1453","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":477139,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.4319/lo.2007.52.4.1439","text":"Publisher Index Page"},{"id":238996,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"52","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-07-31","publicationStatus":"PW","scienceBaseUri":"505bae7ae4b08c986b324114","contributors":{"authors":[{"text":"Tobias, Craig R.","contributorId":23410,"corporation":false,"usgs":false,"family":"Tobias","given":"Craig R.","affiliations":[{"id":32398,"text":"University of North Carolina Wilmington","active":true,"usgs":false}],"preferred":false,"id":428934,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bohlke, John Karl 0000-0001-5693-6455 jkbohlke@usgs.gov","orcid":"https://orcid.org/0000-0001-5693-6455","contributorId":127841,"corporation":false,"usgs":true,"family":"Bohlke","given":"John","email":"jkbohlke@usgs.gov","middleInitial":"Karl","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":false,"id":428936,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Harvey, Judson W. 0000-0002-2654-9873 jwharvey@usgs.gov","orcid":"https://orcid.org/0000-0002-2654-9873","contributorId":1796,"corporation":false,"usgs":true,"family":"Harvey","given":"Judson","email":"jwharvey@usgs.gov","middleInitial":"W.","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":428935,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70180392,"text":"70180392 - 2007 - USGS national surveys and analysis projects: Preliminary compilation of integrated geological datasets for the United States: A section in Digital mapping techniques '06 - Workshop proceedings","interactions":[{"subject":{"id":70180392,"text":"70180392 - 2007 - USGS national surveys and analysis projects: Preliminary compilation of integrated geological datasets for the United States: A section in Digital mapping techniques '06 - Workshop proceedings","indexId":"70180392","publicationYear":"2007","noYear":false,"title":"USGS national surveys and analysis projects: Preliminary compilation of integrated geological datasets for the United States: A section in Digital mapping techniques '06 - Workshop proceedings"},"predicate":"IS_PART_OF","object":{"id":81245,"text":"ofr20071285 - 2007 - Digital mapping techniques '06 - Workshop proceedings","indexId":"ofr20071285","publicationYear":"2007","noYear":false,"title":"Digital mapping techniques '06 - Workshop proceedings"},"id":1}],"isPartOf":{"id":81245,"text":"ofr20071285 - 2007 - Digital mapping techniques '06 - Workshop proceedings","indexId":"ofr20071285","publicationYear":"2007","noYear":false,"title":"Digital mapping techniques '06 - Workshop proceedings"},"lastModifiedDate":"2017-01-30T08:30:56","indexId":"70180392","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1285","title":"USGS national surveys and analysis projects: Preliminary compilation of integrated geological datasets for the United States: A section in Digital mapping techniques '06 - Workshop proceedings","docAbstract":"The growth in the use of Geographic Information Systems (GIS) has highlighted the need for regional and national digital geologic maps attributed with age and rock type information. Such spatial data can be conveniently used to generate derivative maps for purposes that include mineral-resource assessment, metallogenic studies, tectonic studies, human health and environmental research.
In 1997, the United States Geological Survey’s Mineral Resources Program initiated an effort to develop national digital databases for use in mineral resource and environmental assessments. One primary activity of this effort was to compile a national digital geologic map database, utilizing state geologic maps, to support mineral resource studies in the range of 1:250,000- to 1:1,000,000-scale. Over the course of the past decade, state databases were prepared using a common standard for the database structure, fields, attributes, and data dictionaries. As of late 2006, standardized geological map databases for all conterminous (CONUS) states have been available on-line as USGS Open-File Reports. For Alaska and Hawaii, new state maps are being prepared, and the preliminary work for Alaska is being released as a series of 1:500,000-scale regional compilations. See below for a list of all published databases.
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