Cenomanian to Campanian rocks of north-central Montana contain shallow economic accumulations of dry natural gas derived from microbial methanogenesis. The methanogens utilized carbon dioxide derived from organic matter in the marginal marine sediments and hydrogen from in situ pore water to generate methane. The most recent USGS assessment of the shallow gas resources of eastern Montana used a petroleum systems approach, identifying the critical components of a petroleum system (source rock, reservoir rock, seal rock, and trap) and their temporal relationships. As a part of this effort, geochemical data from natural gas wells and associated formation waters were used to identify two microbial gas systems and the timing of methanogenesis.
\nTwo microbial gas families are identified in north-central Montana based on stable carbon isotope and gas composition. The Montana Group gas family has heavier δ13C methane values, slightly lighter δD methane values, and a lower carbon dioxide and nitrogen content than the Colorado Group gas family. The two gas families may reflect, in part, the source rock depositional environments, with the Colorado Group rocks representing a more offshore marine depositional environment and the Montana Group rocks representing proximal marine, deltaic and nonmarine depositional environments. Assuming the gas families reflect only source rock characteristics, two microbial petroleum systems can be defined. The first petroleum system, called the Colorado Group microbial gas system, consists of Colorado Group rocks with the shales in the Belle Fourche Formation, Greenhorn Formation, and the Carlile Shale as the presumed source rocks and the interbedded Phillips and Bowdoin sandstones and the Greenhorn Formation limestones as reservoirs. The second petroleum system, called the Montana Group microbial gas system, consists of the Montana Group rocks that include the Gammon Shale and possibly the Claggett Shale as source rocks and the Eagle Sandstone and the Judith River Formation as reservoirs. The Niobrara Formation is tentatively placed in the former system. The geographic extent of the two microbial systems is much larger than the study area and includes an area at least from the Alberta basin to the northwest to the Powder River basin to the southeast. Upper Cretaceous microbial gas accumulations have been recognized along these basin margins at burial depths less than 3000 ft, but have not been recognized within the deeper parts of the basins because subsequent charge of thermogenic oil and gas masks the preexisting microbial gas accumulations.
\nMethanogenesis began soon after the deposition (early-stage methanogenesis) of the Cenomanian to Campanian source sediments, and was either sustained or rejuvenated by episodic meteoric water influx until sometime in the Paleogene. Methanogenesis probably continued until CO2 and hydrogen were depleted or the pore size was compacted to below tolerance levels of the methanogens. The composition of the Montana and Colorado Group gases and coproduced formation water precludes a scenario of late-stage methanogenesis like the Antrim gas system in the Michigan basin. Some portion of the methane charge was originally dissolved in the pore waters, and subsequent reduction in hydrostatic pressure caused the methane to exsolve and migrate into local stratigraphic and structural traps. The critical moment of the microbial gas systems is this timing of exsolution rather than the time of generation (methanogenesis). Other studies suggest that the reduction in hydrostatic pressure may have been caused by multiple geologic events including the lowering of sea level in the Late Cretaceous, and subsequent uplift and erosion events, the youngest of which began about 5 Ma.
","language":"English","publisher":"Rocky Mountain Association of Geologists","publisherLocation":"Denver, CO","usgsCitation":"Lillis, P.G., 2007, Upper cretaceous microbial petroleum systems in north-central Montana: Mountain Geologist, v. 44, no. 1, p. 11-35.","productDescription":"25 p.","startPage":"11","endPage":"35","numberOfPages":"25","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"links":[{"id":241566,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":299336,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://archives.datapages.com/data/mountain-geologist-rmag/data/044/044001/11_rmag-mg440011.htm"}],"country":"United States","state":"Montana","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -113.499755859375,\n 46.521075663842836\n ],\n [\n -113.499755859375,\n 49.009050809382046\n ],\n [\n -106.490478515625,\n 49.009050809382046\n ],\n [\n -106.490478515625,\n 46.521075663842836\n ],\n [\n -113.499755859375,\n 46.521075663842836\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"44","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bbd50e4b08c986b328f6d","contributors":{"authors":[{"text":"Lillis, Paul G. 0000-0002-7508-1699 plillis@usgs.gov","orcid":"https://orcid.org/0000-0002-7508-1699","contributorId":1817,"corporation":false,"usgs":true,"family":"Lillis","given":"Paul","email":"plillis@usgs.gov","middleInitial":"G.","affiliations":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":437661,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70032058,"text":"70032058 - 2007 - Ecology and behavior of the Midget Faded Rattlesnake (Crotalus oreganus concolor) in Wyoming","interactions":[],"lastModifiedDate":"2012-03-12T17:21:28","indexId":"70032058","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2334,"text":"Journal of Herpetology","active":true,"publicationSubtype":{"id":10}},"title":"Ecology and behavior of the Midget Faded Rattlesnake (Crotalus oreganus concolor) in Wyoming","docAbstract":"We conducted a three-year study to describe the ecology and behavior of the Midget Faded Rattlesnake, Crotalus organus concolor. We encountered 426 and telemetered 50 C. o. concolor between 2000 and 2002. We found that their primary diet was lizards (associated with rock outcrops), though they will consume small mammals and birds. They den in aggregations, although in low numbers when compared to other subspecies. Movements and activity ranges were among the largest reported for rattlesnakes. Minimum convex polygon area was 117.8 ha for males, 63.9 ha for nongravid females, and 4.8 ha for gravid females. Mean distances traveled per year were 2122.0 m for males, 1956.0 m for nongravid females, and 296.7 m for gravid and postpartum females. Following emergence from hibernation, they spent several weeks shedding, often in aggregations before migration, and migrations occurred in early summer. Most snakes made straight-line movements to and from discrete summer activity ranges where short, multidirectional movements ensued, although others made multidirectional movements throughout the active season. We observed mating behavior between 21 July and 12 August. Gravid females gave birth during the third week of August. Mean clutch size was 4.17 (range 2-7). We found that the sex ratio was skewed favoring females 1:1.24, and they were sexually dimorphic in size (males SVL = 44.1 cm; females SVL = 40.8 cm). Our data further illustrate the diversity within the large group of Western Rattlesnakes (Crotalus viridis). Copyright 2007 Society for the Study of Amphibians and Reptiles.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Herpetology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1670/0022-1511(2007)41[41:EABOTM]2.0.CO;2","issn":"00221511","usgsCitation":"Parker, J., and Anderson, S., 2007, Ecology and behavior of the Midget Faded Rattlesnake (Crotalus oreganus concolor) in Wyoming: Journal of Herpetology, v. 41, no. 1, p. 41-51, https://doi.org/10.1670/0022-1511(2007)41[41:EABOTM]2.0.CO;2.","startPage":"41","endPage":"51","numberOfPages":"11","costCenters":[],"links":[{"id":214848,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1670/0022-1511(2007)41[41:EABOTM]2.0.CO;2"},{"id":242601,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0564e4b0c8380cd50da6","contributors":{"authors":[{"text":"Parker, J.M.","contributorId":87497,"corporation":false,"usgs":true,"family":"Parker","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":434347,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Anderson, S.H.","contributorId":33667,"corporation":false,"usgs":true,"family":"Anderson","given":"S.H.","email":"","affiliations":[],"preferred":false,"id":434346,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70032055,"text":"70032055 - 2007 - Sensitivity of high-frequency Rayleigh-wave data revisited","interactions":[],"lastModifiedDate":"2012-03-12T17:21:28","indexId":"70032055","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Sensitivity of high-frequency Rayleigh-wave data revisited","docAbstract":"Rayleigh-wave phase velocity of a layered earth model is a function of frequency and four groups of earth properties: P-wave velocity, S-wave velocity (Vs), density, and thickness of layers. Analysis of the Jacobian matrix (or the difference method) provides a measure of dispersion curve sensitivity to earth properties. Vs is the dominant influence for the fundamental mode (Xia et al., 1999) and higher modes (Xia et al., 2003) of dispersion curves in a high frequency range (>2 Hz) followed by layer thickness. These characteristics are the foundation of determining S-wave velocities by inversion of Rayleigh-wave data. More applications of surface-wave techniques show an anomalous velocity layer such as a high-velocity layer (HVL) or a low-velocity layer (LVL) commonly exists in near-surface materials. Spatial location (depth) of an anomalous layer is usually the most important information that surface-wave techniques are asked to provide. Understanding and correctly defining the sensitivity of high-frequency Rayleigh-wave data due to depth of an anomalous velocity layer are crucial in applying surface-wave techniques to obtain a Vs profile and/or determine the depth of an anomalous layer. Because depth is not a direct earth property of a layered model, changes in depth will result in changes in other properties. Modeling results show that sensitivity at a given depth calculated by the difference method is dependent on the Vs difference (contrast) between an anomalous layer and surrounding layers. The larger the contrast is, the higher the sensitivity due to depth of the layer. Therefore, the Vs contrast is a dominant contributor to sensitivity of Rayleigh-wave data due to depth of an anomalous layer. Modeling results also suggest that the most sensitive depth for an HVL is at about the middle of the depth to the half-space, but for an LVL it is near the ground surface. ?? 2007 Society of Exploration Geophysicists.","largerWorkTitle":"SEG Technical Program Expanded Abstracts","language":"English","doi":"10.1190/1.2792614","issn":"10523812","usgsCitation":"Xia, J., Miller, R., and Ivanov, J., 2007, Sensitivity of high-frequency Rayleigh-wave data revisited, in SEG Technical Program Expanded Abstracts, v. 26, no. 1, p. 1142-1146, https://doi.org/10.1190/1.2792614.","startPage":"1142","endPage":"1146","numberOfPages":"5","costCenters":[],"links":[{"id":214781,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1190/1.2792614"},{"id":242532,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-09-14","publicationStatus":"PW","scienceBaseUri":"505b8d30e4b08c986b3182c1","contributors":{"authors":[{"text":"Xia, J.","contributorId":63513,"corporation":false,"usgs":true,"family":"Xia","given":"J.","email":"","affiliations":[],"preferred":false,"id":434337,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Miller, R. D.","contributorId":92693,"corporation":false,"usgs":true,"family":"Miller","given":"R. D.","affiliations":[],"preferred":false,"id":434338,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ivanov, J.","contributorId":107068,"corporation":false,"usgs":true,"family":"Ivanov","given":"J.","email":"","affiliations":[],"preferred":false,"id":434339,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70032054,"text":"70032054 - 2007 - Survey trends of North American shorebirds: Population declines or shifting distributions?","interactions":[],"lastModifiedDate":"2018-03-29T14:01:13","indexId":"70032054","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2190,"text":"Journal of Avian Biology","active":true,"publicationSubtype":{"id":10}},"title":"Survey trends of North American shorebirds: Population declines or shifting distributions?","docAbstract":"We analyzed data from two surveys of fall migrating shorebirds in central and eastern North America to estimate annual trends in means per survey and to determine whether trends indicate a change in population size or might have been caused by other factors. The analysis showed a broad decline in means per survey in Atlantic Canada and the northeastern United States (North Atlantic region). For example, 9 of 9 significant trends in this region were <1 (P=0.004), and the mean, annual rate of change among 30 species was 0.9783, a decline of −2.17% per year (P<0.001). Trends in the midwestern United States (Midwest region) showed no clear pattern. The mean among 29 species was 1.0090 (P=0.35). Only 4 of the trends were significant. Several hypotheses were evaluated to identify causes of the declining means per survey in the North Atlantic region. The most likely hypothesis appears to be a decline in the breeding populations that supply migrants to the North Atlantic region, but a change in movements, for example passing through the region more quickly in recent years, cannot be excluded as an explanation. Further surveys of arctic breeding areas coupled with analysis of long‐term survey data from western North America would be helpful in determining whether the declines found in this analysis are also occurring in other areas.
","language":"English","publisher":"WIley","doi":"10.1111/j.2007.0908-8857.03698.x","usgsCitation":"Bart, J., Brown, S., Harrington, B.A., and Morrison, R., 2007, Survey trends of North American shorebirds: Population declines or shifting distributions?: Journal of Avian Biology, v. 38, no. 1, p. 73-82, https://doi.org/10.1111/j.2007.0908-8857.03698.x.","productDescription":"10 p.","startPage":"73","endPage":"82","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":242531,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"38","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-25","publicationStatus":"PW","scienceBaseUri":"505ba2a0e4b08c986b31f839","contributors":{"authors":[{"text":"Bart, Jonathan jon_bart@usgs.gov","contributorId":57025,"corporation":false,"usgs":true,"family":"Bart","given":"Jonathan","email":"jon_bart@usgs.gov","affiliations":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"preferred":false,"id":434335,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brown, Stephen","contributorId":40096,"corporation":false,"usgs":true,"family":"Brown","given":"Stephen","affiliations":[],"preferred":false,"id":434336,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Harrington, Brian A.","contributorId":58989,"corporation":false,"usgs":true,"family":"Harrington","given":"Brian","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":434333,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Morrison, R.I. Guy","contributorId":52003,"corporation":false,"usgs":true,"family":"Morrison","given":"R.I. Guy","affiliations":[],"preferred":false,"id":434334,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70032053,"text":"70032053 - 2007 - Evolutionary history of the ABCB2 genomic region in teleosts","interactions":[],"lastModifiedDate":"2012-03-12T17:21:28","indexId":"70032053","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1383,"text":"Developmental and Comparative Immunology","active":true,"publicationSubtype":{"id":10}},"title":"Evolutionary history of the ABCB2 genomic region in teleosts","docAbstract":"Gene duplication, silencing and translocation have all been implicated in shaping the unique genomic architecture of the teleost MH regions. Previously, we demonstrated that trout possess five unlinked regions encoding MH genes. One of these regions harbors ABCB2 which in all other vertebrate classes is found in the MHC class II region. In this study, we sequenced a BAC contig for the trout ABCB2 region. Analysis of this region revealed the presence of genes homologous to those located in the human class II (ABCB2, BRD2, ??DAA), extended class II (RGL2, PHF1, SYGP1) and class III (PBX2, Notch-L) regions. The organization and syntenic relationships of this region were then compared to similar regions in humans, Tetraodon and zebrafish to learn more about the evolutionary history of this region. Our analysis indicates that this region was generated during the teleost-specific duplication event while also providing insight about potential MH paralogous regions in teleosts. ?? 2006 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Developmental and Comparative Immunology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.dci.2006.07.010","issn":"0145305X","usgsCitation":"Palti, Y., Rodriguez, M., Gahr, S., and Hansen, J., 2007, Evolutionary history of the ABCB2 genomic region in teleosts: Developmental and Comparative Immunology, v. 31, no. 5, p. 483-498, https://doi.org/10.1016/j.dci.2006.07.010.","startPage":"483","endPage":"498","numberOfPages":"16","costCenters":[],"links":[{"id":214749,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.dci.2006.07.010"},{"id":242499,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"31","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d91e4b0c8380cd530b8","contributors":{"authors":[{"text":"Palti, Y.","contributorId":105081,"corporation":false,"usgs":true,"family":"Palti","given":"Y.","affiliations":[],"preferred":false,"id":434331,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rodriguez, M.F.","contributorId":75769,"corporation":false,"usgs":true,"family":"Rodriguez","given":"M.F.","email":"","affiliations":[],"preferred":false,"id":434329,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gahr, S.A.","contributorId":103889,"corporation":false,"usgs":true,"family":"Gahr","given":"S.A.","affiliations":[],"preferred":false,"id":434330,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hansen, J.D.","contributorId":107880,"corporation":false,"usgs":true,"family":"Hansen","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":434332,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70032030,"text":"70032030 - 2007 - Foraging patterns of Caspian terns and double-crested cormorants in the Columbia River estuary","interactions":[],"lastModifiedDate":"2021-06-07T17:37:46.705487","indexId":"70032030","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2900,"text":"Northwest Science","onlineIssn":"2161-9859","printIssn":"0029-344X","active":true,"publicationSubtype":{"id":10}},"title":"Foraging patterns of Caspian terns and double-crested cormorants in the Columbia River estuary","docAbstract":"We examined spatial and temporal foraging patterns of Caspian terns and double-crested cormorants nesting in the Columbia River estuary, to potentially identify circumstances where juvenile salmonids listed under the U.S. Endangered Species Act might be more vulnerable to predation by these avian piscivores. Data were collected during the 1998 and 1999 breeding seasons, using point count surveys of foraging birds at 40 sites along the river's banks, and using aerial strip transect counts throughout the estuary for terns. In 1998, terns selected tidal flats and sites with roosting beaches nearby for foraging, making greater use of the marine/mixing zone of the estuary later in the season, particularly areas near the ocean jetties. In 1999, cormorants selected foraging sites in freshwater along the main channel with pile dikes present, particularly early in the season. Foraging trends in the other year for each species were generally similar to the above but usually not significant. During aerial surveys we observed 50% of foraging and commuting terns within 8 km of the Rice Island colony, and ≤ 5% of activity occurred ≥ 27 km from this colony in both years. Disproportionately greater cormorant foraging activity at pile dikes may indicate greater vulnerability of salmonids to predation at those features. Colony relocations to sites at sufficient distance from areas of relatively high salmonid abundance may be a straightforward means of reducing impacts of avian predation on salmonids than habitat alterations within the Columbia River estuary, at least for terns.
","language":"English","publisher":"BioOne Complete","doi":"10.3955/0029-344X-81.2.91","usgsCitation":"Lyons, D., Roby, D., and Collis, K., 2007, Foraging patterns of Caspian terns and double-crested cormorants in the Columbia River estuary: Northwest Science, v. 81, no. 2, p. 91-103, https://doi.org/10.3955/0029-344X-81.2.91.","productDescription":"13 p.","startPage":"91","endPage":"103","costCenters":[{"id":517,"text":"Oregon Cooperative Fish and Wildlife Research Unit","active":false,"usgs":true}],"links":[{"id":242659,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Oregon, Washington","otherGeospatial":"Columbia River estuary","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -124.10705566406249,\n 46.22260258751594\n ],\n [\n -124.00680541992188,\n 46.224502800461025\n ],\n [\n -123.90930175781249,\n 46.22260258751594\n ],\n [\n -123.90930175781249,\n 46.3127900695348\n ],\n [\n -124.10705566406249,\n 46.3127900695348\n ],\n [\n -124.10705566406249,\n 46.22260258751594\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"81","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1300e4b0c8380cd5449e","contributors":{"authors":[{"text":"Lyons, Donald E.","contributorId":20119,"corporation":false,"usgs":true,"family":"Lyons","given":"Donald E.","affiliations":[],"preferred":false,"id":434222,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Roby, D.D. 0000-0001-9844-0992","orcid":"https://orcid.org/0000-0001-9844-0992","contributorId":70944,"corporation":false,"usgs":true,"family":"Roby","given":"D.D.","affiliations":[],"preferred":false,"id":434223,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Collis, K.","contributorId":90910,"corporation":false,"usgs":true,"family":"Collis","given":"K.","email":"","affiliations":[],"preferred":false,"id":434224,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70032028,"text":"70032028 - 2007 - Bora event variability and the role of air-sea feedback","interactions":[],"lastModifiedDate":"2012-03-12T17:21:27","indexId":"70032028","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2315,"text":"Journal of Geophysical Research C: Oceans","active":true,"publicationSubtype":{"id":10}},"title":"Bora event variability and the role of air-sea feedback","docAbstract":"A two-way interacting high resolution numerical simulation of the Adriatic Sea using the Navy Coastal Ocean Model (NCOM) and Coupled Ocean/ Atmosphere Mesoscale Prediction System (COAMPS??) was conducted to improve forecast momentum and heat flux fields, and to evaluate surface flux field differences for two consecutive bora events during February 2003. (COAMPS?? is a registered trademark of the Naval Research Laboratory.) The strength, mean positions and extensions of the bora jets, and the atmospheric conditions driving them varied considerably between the two events. Bora 1 had 62% stronger heat flux and 51% larger momentum flux than bora 2. The latter displayed much greater diurnal variability characterized by inertial oscillations and the early morning strengthening of a west Adriatic barrier jet, beneath which a stronger west Adriatic ocean current developed. Elsewhere, surface ocean current differences between the two events were directly related to differences in wind stress curl generated by the position and strength of the individual bora jets. The mean heat flux bias was reduced by 72%, and heat flux RMSE reduced by 30% on average at four instrumented over-water sites in the two-way coupled simulation relative to the uncoupled control. Largest reductions in wind stress were found in the bora jets, while the biggest reductions in heat flux were found along the north and west coasts of the Adriatic. In bora 2, SST gradients impacted the wind stress curl along the north and west coasts, and in bora 1 wind stress curl was sensitive to the Istrian front position and strength. The two-way coupled simulation produced diminished surface current speeds of ???12% over the northern Adriatic during both bora compared with a one-way coupled simulation. Copyright 2007 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research C: Oceans","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2006JC003726","issn":"01480227","usgsCitation":"Pullen, J., Doyle, J., Haack, T., Dorman, C., Signell, R.P., and Lee, C., 2007, Bora event variability and the role of air-sea feedback: Journal of Geophysical Research C: Oceans, v. 112, no. 3, https://doi.org/10.1029/2006JC003726.","costCenters":[],"links":[{"id":477170,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hdl.handle.net/1912/3671","text":"External Repository"},{"id":242629,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214873,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2006JC003726"}],"volume":"112","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-02-13","publicationStatus":"PW","scienceBaseUri":"5059f20fe4b0c8380cd4afb1","contributors":{"authors":[{"text":"Pullen, J.","contributorId":34339,"corporation":false,"usgs":true,"family":"Pullen","given":"J.","email":"","affiliations":[],"preferred":false,"id":434215,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Doyle, J.D.","contributorId":67917,"corporation":false,"usgs":true,"family":"Doyle","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":434217,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Haack, T.","contributorId":89366,"corporation":false,"usgs":true,"family":"Haack","given":"T.","email":"","affiliations":[],"preferred":false,"id":434219,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dorman, C.","contributorId":25781,"corporation":false,"usgs":true,"family":"Dorman","given":"C.","email":"","affiliations":[],"preferred":false,"id":434214,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Signell, R. P.","contributorId":89147,"corporation":false,"usgs":true,"family":"Signell","given":"R.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":434218,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Lee, C.M.","contributorId":40031,"corporation":false,"usgs":true,"family":"Lee","given":"C.M.","email":"","affiliations":[],"preferred":false,"id":434216,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70032024,"text":"70032024 - 2007 - Scaling local species-habitat relations to the larger landscape with a hierarchical spatial count model","interactions":[],"lastModifiedDate":"2012-03-12T17:21:28","indexId":"70032024","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2602,"text":"Landscape Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Scaling local species-habitat relations to the larger landscape with a hierarchical spatial count model","docAbstract":"Much of what is known about avian species-habitat relations has been derived from studies of birds at local scales. It is entirely unclear whether the relations observed at these scales translate to the larger landscape in a predictable linear fashion. We derived habitat models and mapped predicted abundances for three forest bird species of eastern North America using bird counts, environmental variables, and hierarchical models applied at three spatial scales. Our purpose was to understand habitat associations at multiple spatial scales and create predictive abundance maps for purposes of conservation planning at a landscape scale given the constraint that the variables used in this exercise were derived from local-level studies. Our models indicated a substantial influence of landscape context for all species, many of which were counter to reported associations at finer spatial extents. We found land cover composition provided the greatest contribution to the relative explained variance in counts for all three species; spatial structure was second in importance. No single spatial scale dominated any model, indicating that these species are responding to factors at multiple spatial scales. For purposes of conservation planning, areas of predicted high abundance should be investigated to evaluate the conservation potential of the landscape in their general vicinity. In addition, the models and spatial patterns of abundance among species suggest locations where conservation actions may benefit more than one species. ?? 2006 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Landscape Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10980-006-9005-2","issn":"09212973","usgsCitation":"Thogmartin, W., and Knutson, M.G., 2007, Scaling local species-habitat relations to the larger landscape with a hierarchical spatial count model: Landscape Ecology, v. 22, no. 1, p. 61-75, https://doi.org/10.1007/s10980-006-9005-2.","startPage":"61","endPage":"75","numberOfPages":"15","costCenters":[],"links":[{"id":214813,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10980-006-9005-2"},{"id":242565,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"22","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-06-14","publicationStatus":"PW","scienceBaseUri":"505b8716e4b08c986b3162e3","contributors":{"authors":[{"text":"Thogmartin, W.E. 0000-0002-2384-4279","orcid":"https://orcid.org/0000-0002-2384-4279","contributorId":26392,"corporation":false,"usgs":true,"family":"Thogmartin","given":"W.E.","affiliations":[],"preferred":false,"id":434201,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Knutson, M. G.","contributorId":55375,"corporation":false,"usgs":false,"family":"Knutson","given":"M.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":434202,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70032022,"text":"70032022 - 2007 - Influence of tectonic folding on rockfall susceptibility, American Fork Canyon, Utah, USA","interactions":[],"lastModifiedDate":"2013-02-21T20:40:23","indexId":"70032022","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2824,"text":"Natural Hazards and Earth System Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Influence of tectonic folding on rockfall susceptibility, American Fork Canyon, Utah, USA","docAbstract":"We examine rockfall susceptibility of folded strata in the Sevier fold-thrust belt exposed in American Fork Canyon in north-central Utah. Large-scale geologic mapping, talus production data, rock-mass-quality measurements, and historical rockfall data indicate that rockfall susceptibility is correlated with limb dip and curvature of the folded, cliff-forming Mississippian limestones. On fold limbs, rockfall susceptibility increases as dip increases. This relation is controlled by several factors, including an increase in adverse dip conditions and apertures of discontinuities, and shearing by flexural slip during folding that has reduced the friction angles of discontinuities by smoothing surface asperities. Susceptibility is greater in fold hinge zones than on adjacent limbs primarily because there are greater numbers of discontinuities in hinge zones. We speculate that susceptibility increases in hinge zones as fold curvature becomes tighter.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Natural Hazards and Earth System Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"European Geosciences Union","doi":"10.5194/nhess-7-1-2007","issn":"15618633","usgsCitation":"Coe, J.A., and Harp, E.L., 2007, Influence of tectonic folding on rockfall susceptibility, American Fork Canyon, Utah, USA: Natural Hazards and Earth System Sciences, v. 7, no. 1, p. 1-14, https://doi.org/10.5194/nhess-7-1-2007.","startPage":"1","endPage":"14","numberOfPages":"14","costCenters":[],"links":[{"id":477202,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.5194/nhess-7-1-2007","text":"Publisher Index Page"},{"id":242530,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":267915,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.5194/nhess-7-1-2007"}],"volume":"7","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-10","publicationStatus":"PW","scienceBaseUri":"505a3b84e4b0c8380cd625e0","contributors":{"authors":[{"text":"Coe, J. A.","contributorId":8867,"corporation":false,"usgs":true,"family":"Coe","given":"J.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":434196,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harp, E. L.","contributorId":59026,"corporation":false,"usgs":true,"family":"Harp","given":"E.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":434197,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031994,"text":"70031994 - 2007 - Soil nutrients influence spatial distributions of tropical trees species","interactions":[],"lastModifiedDate":"2012-03-12T17:21:27","indexId":"70031994","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3165,"text":"Proceedings of the National Academy of Sciences of the United States of America","active":true,"publicationSubtype":{"id":10}},"title":"Soil nutrients influence spatial distributions of tropical trees species","docAbstract":"The importance of niche vs. neutral assembly mechanisms in structuring tropical tree communities remains an important unsettled question in community ecology [Bell G (2005) Ecology 86:1757-1770]. There is ample evidence that species distributions are determined by soils and habitat factors at landscape (<104 km2) and regional scales. At local scales (<1 km2), however, habitat factors and species distributions show comparable spatial aggregation, making it difficult to disentangle the importance of niche and dispersal processes. In this article, we test soil resource-based niche assembly at a local scale, using species and soil nutrient distributions obtained at high spatial resolution in three diverse neotropical forest plots in Colombia (La Planada), Ecuador (Yasuni), and Panama (Barro Colorado Island). Using spatial distribution maps of >0.5 million individual trees of 1,400 species and 10 essential plant nutrients, we used Monte Carlo simulations of species distributions to test plant-soil associations against null expectations based on dispersal assembly. We found that the spatial distributions of 36-51% of tree species at these sites show strong associations to soil nutrient distributions. Neutral dispersal assembly cannot account for these plant-soil associations or the observed niche breadths of these species. These results indicate that belowground resource availability plays an important role in the assembly of tropical tree communities at local scales and provide the basis for future investigations on the mechanisms of resource competition among tropical tree species. ?? 2007 by The National Academy of Sciences of the USA.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Proceedings of the National Academy of Sciences of the United States of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1073/pnas.0604666104","issn":"00278424","usgsCitation":"John, R., Dalling, J., Harms, K., Yavitt, J., Stallard, R., Mirabello, M., Hubbell, S., Valencia, R., Navarrete, H., Vallejo, M., and Foster, R., 2007, Soil nutrients influence spatial distributions of tropical trees species: Proceedings of the National Academy of Sciences of the United States of America, v. 104, no. 3, p. 864-869, https://doi.org/10.1073/pnas.0604666104.","startPage":"864","endPage":"869","numberOfPages":"6","costCenters":[],"links":[{"id":477169,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://www.ncbi.nlm.nih.gov/pmc/articles/1783405","text":"External Repository"},{"id":214846,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1073/pnas.0604666104"},{"id":242598,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"104","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-01-16","publicationStatus":"PW","scienceBaseUri":"505b9210e4b08c986b319c8e","contributors":{"authors":[{"text":"John, R.","contributorId":27689,"corporation":false,"usgs":true,"family":"John","given":"R.","email":"","affiliations":[],"preferred":false,"id":434034,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dalling, J.W.","contributorId":103103,"corporation":false,"usgs":true,"family":"Dalling","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":434042,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Harms, K.E.","contributorId":58856,"corporation":false,"usgs":true,"family":"Harms","given":"K.E.","email":"","affiliations":[],"preferred":false,"id":434037,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Yavitt, J.B.","contributorId":96495,"corporation":false,"usgs":true,"family":"Yavitt","given":"J.B.","affiliations":[],"preferred":false,"id":434041,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Stallard, R.F.","contributorId":30247,"corporation":false,"usgs":true,"family":"Stallard","given":"R.F.","email":"","affiliations":[],"preferred":false,"id":434035,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Mirabello, M.","contributorId":91316,"corporation":false,"usgs":true,"family":"Mirabello","given":"M.","email":"","affiliations":[],"preferred":false,"id":434040,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Hubbell, S.P.","contributorId":77376,"corporation":false,"usgs":true,"family":"Hubbell","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":434039,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Valencia, R.","contributorId":64909,"corporation":false,"usgs":true,"family":"Valencia","given":"R.","email":"","affiliations":[],"preferred":false,"id":434038,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Navarrete, H.","contributorId":12704,"corporation":false,"usgs":true,"family":"Navarrete","given":"H.","email":"","affiliations":[],"preferred":false,"id":434032,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Vallejo, M.","contributorId":49622,"corporation":false,"usgs":true,"family":"Vallejo","given":"M.","email":"","affiliations":[],"preferred":false,"id":434036,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Foster, R.B.","contributorId":21360,"corporation":false,"usgs":true,"family":"Foster","given":"R.B.","email":"","affiliations":[],"preferred":false,"id":434033,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}} ,{"id":70031993,"text":"70031993 - 2007 - Possible refugia in the Alexander Archipelago of southeastern Alaska during the late Wisconsin glaciation","interactions":[],"lastModifiedDate":"2012-03-12T17:21:27","indexId":"70031993","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1168,"text":"Canadian Journal of Earth Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Possible refugia in the Alexander Archipelago of southeastern Alaska during the late Wisconsin glaciation","docAbstract":"The interpretation of the extent of late Wisconsin glaciation in southeastern Alaska has varied between geologists and biologists. Maps and reports of the region prepared by geologists commonly indicated that late Wisconsin ice extended as a large uniform front west to the edge of the continental shelf. However, the distribution of plants and animals in the region has led many biologists to suggest that there may have been ice-free areas that served as refugia during the late Wisconsin. Based on analyses of aerial photographs, topographic maps, and bathymetric charts, in conjunction with a review of previous literature and reconnaissance fieldwork throughout the region, this study presents data supporting a limited ice extent in the Alexander Archipelago during the late Wisconsin and identifies possible ice-free areas that may have served as refugia. These areas include (1) the Fairweather Ground, (2) the Herbert Graves Island area, (3) the western coast of southern Baranof Island and adjacent continental shelf, (4) Coronation Island and the adjacent continental shelf, (5) the Warren Island area, (6) the continental shelf from west of Heceta Island to Forrester Island in the south, (7) parts of the west coast of southern Dall Island, and (8) lowland areas in southern Prince of Wales Island. The identification of these possible refugia has bearing on the recolonization of the Alexander Archipelago, as they could have served as centers of biotic dispersal upon regional deglaciation and as stepping stones for early humans with a maritime tradition entering the western hemisphere from Asia. ?? 2007 NRC Canada.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Canadian Journal of Earth Sciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1139/E06-081","issn":"00084077","usgsCitation":"Carrara, P., Ager, T.A., and Baichtal, J., 2007, Possible refugia in the Alexander Archipelago of southeastern Alaska during the late Wisconsin glaciation: Canadian Journal of Earth Sciences, v. 44, no. 2, p. 229-244, https://doi.org/10.1139/E06-081.","startPage":"229","endPage":"244","numberOfPages":"16","costCenters":[],"links":[{"id":214845,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1139/E06-081"},{"id":242597,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"44","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7e36e4b0c8380cd7a3dc","contributors":{"authors":[{"text":"Carrara, P. E.","contributorId":33727,"corporation":false,"usgs":true,"family":"Carrara","given":"P. E.","affiliations":[],"preferred":false,"id":434029,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ager, T. A.","contributorId":88386,"corporation":false,"usgs":true,"family":"Ager","given":"T.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":434030,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Baichtal, J.F.","contributorId":94777,"corporation":false,"usgs":true,"family":"Baichtal","given":"J.F.","email":"","affiliations":[],"preferred":false,"id":434031,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031991,"text":"70031991 - 2007 - Ground-penetrating radar: A tool for monitoring bridge scour","interactions":[],"lastModifiedDate":"2012-03-12T17:21:27","indexId":"70031991","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1574,"text":"Environmental & Engineering Geoscience","printIssn":"1078-7275","active":true,"publicationSubtype":{"id":10}},"title":"Ground-penetrating radar: A tool for monitoring bridge scour","docAbstract":"Ground-penetrating radar (GPR) data were acquired across shallow streams and/or drainage ditches at 10 bridge sites in Missouri by maneuvering the antennae across the surface of the water and riverbank from the bridge deck, manually or by boat. The acquired two-dimensional and three-dimensional data sets accurately image the channel bottom, demonstrating that the GPR tool can be used to estimate and/or monitor water depths in shallow fluvial environments. The study results demonstrate that the GPR tool is a safe and effective tool for measuring and/or monitoring scour in proximity to bridges. The technique can be used to safely monitor scour at assigned time intervals during peak flood stages, thereby enabling owners to take preventative action prior to potential failure. The GPR tool can also be used to investigate depositional and erosional patterns over time, thereby elucidating these processes on a local scale. In certain instances, in-filled scour features can also be imaged and mapped. This information may be critically important to those engaged in bridge design. GPR has advantages over other tools commonly employed for monitoring bridge scour (reflection seismic profiling, echo sounding, and electrical conductivity probing). The tool doesn't need to be coupled to the water, can be moved rapidly across (or above) the surface of a stream, and provides an accurate depth-structure model of the channel bottom and subchannel bottom sediments. The GPR profiles can be extended across emerged sand bars or onto the shore.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental and Engineering Geoscience","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/gseegeosci.13.1.1","issn":"10787275","usgsCitation":"Anderson, N., Ismael, A., and Thitimakorn, T., 2007, Ground-penetrating radar: A tool for monitoring bridge scour: Environmental & Engineering Geoscience, v. 13, no. 1, p. 1-10, https://doi.org/10.2113/gseegeosci.13.1.1.","startPage":"1","endPage":"10","numberOfPages":"10","costCenters":[],"links":[{"id":214810,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gseegeosci.13.1.1"},{"id":242562,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"13","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2b74e4b0c8380cd5b9c1","contributors":{"authors":[{"text":"Anderson, N.L.","contributorId":55129,"corporation":false,"usgs":true,"family":"Anderson","given":"N.L.","email":"","affiliations":[],"preferred":false,"id":434022,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ismael, A.M.","contributorId":88168,"corporation":false,"usgs":true,"family":"Ismael","given":"A.M.","email":"","affiliations":[],"preferred":false,"id":434024,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Thitimakorn, T.","contributorId":75770,"corporation":false,"usgs":true,"family":"Thitimakorn","given":"T.","email":"","affiliations":[],"preferred":false,"id":434023,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031971,"text":"70031971 - 2007 - Modelingevapotranspirationina sub-tropical climate","interactions":[],"lastModifiedDate":"2012-03-12T17:21:26","indexId":"70031971","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2257,"text":"Journal of Environmental Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Modelingevapotranspirationina sub-tropical climate","docAbstract":"Evapotranspiration (ET) loss is estimated at about 80-85% of annual precipitation in South Florida. Accurate prediction of ET is important during and beyond the implementation of the Comprehensive Everglades Restoration Plan (CERP). In the USDA's Everglades Agro-Hydrology Model (EAHM) the soil water intake is linked with the soil water redistribution, soil evaporation, plant transpiration, subsurface lateral flow and subsurface drainage to calculate daily root zone soil water content. Hydrometeorological data from three sites with different soil moisture content and vegetal cover were used to evaluate the EAHM ET routine. In general, the EAHM water balance sub-model simulated the daily ET with acceptable accuracy in the area with standing water (Everglades) while using the Penman method. However, in the area with grass cover, there was a discrepancy between the model simulated and measured ET using either the Penman or the Priestley-Taylor method. The results indicated that in the region with two distinct climate patterns: dry (low humidity, more wind, and less precipitation) and wet (high humidity, less wind and more rainfall) such as South Florida, a combination method like Penman should be used for prediction of daily ET. However, in order to improve the predictability of the ET methods, information about surface albedo is needed for land surfaces with grass vegetation during the growing season.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Environmental Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"10583912","usgsCitation":"Savabi, M., Cochrane, T., German, E., Ikiz, C., and Cockshutt, N., 2007, Modelingevapotranspirationina sub-tropical climate: Journal of Environmental Hydrology, v. 15, p. 1-15.","startPage":"1","endPage":"15","numberOfPages":"15","costCenters":[],"links":[{"id":242789,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5c5ee4b0c8380cd6fc35","contributors":{"authors":[{"text":"Savabi, M.R.","contributorId":25376,"corporation":false,"usgs":true,"family":"Savabi","given":"M.R.","email":"","affiliations":[],"preferred":false,"id":433947,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cochrane, T.A.","contributorId":42447,"corporation":false,"usgs":true,"family":"Cochrane","given":"T.A.","email":"","affiliations":[],"preferred":false,"id":433948,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"German, E.","contributorId":45133,"corporation":false,"usgs":true,"family":"German","given":"E.","affiliations":[],"preferred":false,"id":433950,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ikiz, C.","contributorId":101901,"corporation":false,"usgs":true,"family":"Ikiz","given":"C.","email":"","affiliations":[],"preferred":false,"id":433951,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cockshutt, N.","contributorId":43187,"corporation":false,"usgs":true,"family":"Cockshutt","given":"N.","email":"","affiliations":[],"preferred":false,"id":433949,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70031969,"text":"70031969 - 2007 - Surface drifter derived circulation in the northern and middle Adriatic Sea: Response to wind regime and season","interactions":[],"lastModifiedDate":"2012-03-12T17:21:26","indexId":"70031969","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2315,"text":"Journal of Geophysical Research C: Oceans","active":true,"publicationSubtype":{"id":10}},"title":"Surface drifter derived circulation in the northern and middle Adriatic Sea: Response to wind regime and season","docAbstract":"More than 120 satellite-tracked drifters were deployed in the northern and middle Adriatic (NMA) Sea between September 2002 and November 2003, with the purpose of studying the surface circulation at mesoscale to seasonal scale in relation to wind forcing, river runoff, and bottom topography. Pseudo-Eulerian and Lagrangian statistics were calculated from the low-pass-filtered drifter velocity data between September 2002 and December 2003. The structure of the mean circulation is determined with unprecedented high horizontal resolution by the new data. In particular, mean currents, velocity variance, and kinetic energy levels are shown to be maximal in the Western Adriatic Current (WAC). Separating data into seasons, we found that the mean kinetic energy is maximal in fall, with high values also in winter, while it is significantly weaker in summer. High-resolution Local Area Model Italy winds were used to relate the drifter velocities to the wind fields. The surface currents appear to be significantly influenced by the winds. The mean flow during the northeasterly bora regime shows an intensification of the across-basin recirculating currents. In addition, the WAC is strongly intensified both in intensity and in its offshore lateral extension. In the southeasterly sirocco regime, northward flow without recirculation dominates in the eastern half of the basin, while during northwesterly maestro the WAC is enhanced. Separating the data into low and high Po River discharge rates for low-wind conditions shows that the WAC and the velocity fluctuations in front of the Po delta are stronger for high Po River runoff. Lagrangian covariance, diffusivity, and integral time and space scales are larger in the along-basin direction and are maximal in the southern portion of the WAC. Copyright 2006 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research C: Oceans","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2005JC003177","issn":"01480227","usgsCitation":"Ursella, L., Poulain, P., and Signell, R.P., 2007, Surface drifter derived circulation in the northern and middle Adriatic Sea: Response to wind regime and season: Journal of Geophysical Research C: Oceans, v. 112, no. 3, https://doi.org/10.1029/2005JC003177.","costCenters":[],"links":[{"id":487040,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2005jc003177","text":"Publisher Index Page"},{"id":214994,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2005JC003177"},{"id":242757,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"112","issue":"3","noUsgsAuthors":false,"publicationDate":"2006-12-15","publicationStatus":"PW","scienceBaseUri":"505b9fa5e4b08c986b31e74b","contributors":{"authors":[{"text":"Ursella, L.","contributorId":55658,"corporation":false,"usgs":true,"family":"Ursella","given":"L.","email":"","affiliations":[],"preferred":false,"id":433931,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Poulain, P.-M.","contributorId":81230,"corporation":false,"usgs":true,"family":"Poulain","given":"P.-M.","email":"","affiliations":[],"preferred":false,"id":433932,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Signell, R. P.","contributorId":89147,"corporation":false,"usgs":true,"family":"Signell","given":"R.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":433933,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031966,"text":"70031966 - 2007 - Incorporating availability for detection in estimates of bird abundance","interactions":[],"lastModifiedDate":"2017-05-08T12:58:12","indexId":"70031966","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3544,"text":"The Auk","onlineIssn":"1938-4254","printIssn":"0004-8038","active":true,"publicationSubtype":{"id":10}},"title":"Incorporating availability for detection in estimates of bird abundance","docAbstract":"Several bird-survey methods have been proposed that provide an estimated detection probability so that bird-count statistics can be used to estimate bird abundance. However, some of these estimators adjust counts of birds observed by the probability that a bird is detected and assume that all birds are available to be detected at the time of the survey. We marked male Henslow's Sparrows (Ammodramus henslowii) and Grasshopper Sparrows (A. savannarum) and monitored their behavior during May-July 2002 and 2003 to estimate the proportion of time they were available for detection. We found that the availability of Henslow's Sparrows declined in late June to <10% for 5- or 10-min point counts when a male had to sing and be visible to the observer; but during 20 May-19 June, males were available for detection 39.1% (SD = 27.3) of the time for 5-min point counts and 43.9% (SD = 28.9) of the time for 10-min point counts (n = 54). We detected no temporal changes in availability for Grasshopper Sparrows, but estimated availability to be much lower for 5-min point counts (10.3%, SD = 12.2) than for 10-min point counts (19.2%, SD = 22.3) when males had to be visible and sing during the sampling period (n = 80). For distance sampling, we estimated the availability of Henslow's Sparrows to be 44.2% (SD = 29.0) and the availability of Grasshopper Sparrows to be 20.6% (SD = 23.5). We show how our estimates of availability can be incorporated in the abundance and variance estimators for distance sampling and modify the abundance and variance estimators for the double-observer method. Methods that directly estimate availability from bird counts but also incorporate detection probabilities need further development and will be important for obtaining unbiased estimates of abundance for these species.
","language":"English","publisher":"American Ornithological Society","doi":"10.1642/0004-8038(2007)124[96:IAFDIE]2.0.CO;2","issn":"00048038","usgsCitation":"Diefenbach, D., Marshall, M., Mattice, J., and Brauning, D., 2007, Incorporating availability for detection in estimates of bird abundance: The Auk, v. 124, no. 1, p. 96-106, https://doi.org/10.1642/0004-8038(2007)124[96:IAFDIE]2.0.CO;2.","productDescription":"11 p.","startPage":"96","endPage":"106","costCenters":[],"links":[{"id":242721,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"124","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a39e6e4b0c8380cd61a92","contributors":{"authors":[{"text":"Diefenbach, Duane R. 0000-0001-5111-1147","orcid":"https://orcid.org/0000-0001-5111-1147","contributorId":106592,"corporation":false,"usgs":true,"family":"Diefenbach","given":"Duane R.","affiliations":[],"preferred":false,"id":433919,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Marshall, M.R.","contributorId":82427,"corporation":false,"usgs":true,"family":"Marshall","given":"M.R.","email":"","affiliations":[],"preferred":false,"id":433918,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mattice, J.A.","contributorId":12705,"corporation":false,"usgs":true,"family":"Mattice","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":433916,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Brauning, D.W.","contributorId":45129,"corporation":false,"usgs":true,"family":"Brauning","given":"D.W.","email":"","affiliations":[],"preferred":false,"id":433917,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70031965,"text":"70031965 - 2007 - Prioritizing bottomland hardwood forest sites for protection and augmentation","interactions":[],"lastModifiedDate":"2019-09-30T12:01:24","indexId":"70031965","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2821,"text":"Natural Areas Journal","active":true,"publicationSubtype":{"id":10}},"title":"Prioritizing bottomland hardwood forest sites for protection and augmentation","docAbstract":"Bottomland hardwood forest has been greatly diminished by conversion to agriculture. Less than 25% of the pre-Columbian bottomland hardwood forests remain in the southeastern United States. Because of the valuable ecological and hydrological functions performed by these forests, their conservation and restoration has been a high priority. Part of these restoration efforts has focused on developing tools that can be used for both assessments at the landscape level and policy implementation at the local level. The distribution of bottomland hardwood forests in the Cache and White River watersheds in eastern Arkansas were examined using existing GIS databases. Criteria were developed to select areas that should be conserved or augmented for wildlife habitat. Over 67% of the study area was classified as agriculture, with bottomland hardwood forest the next largest habitat class. The thickness of a forest fragment was defined as the radius of the largest circle that can be inscribed in a fragment. Thickness was used in three ways. First, individual forest fragments were identified and selected based on ecological function using criteria we established. Second, individual fragments that were too small to support interior species, but large enough that if moderately augmented they could recover that function, were identified and selected. These augmentable fragments were further prioritized by adjacency to habitat that might be suitable for reforestation, namely agriculture. Third, watersheds were prioritized for conservation and augmentation based on the size and distributions of forest fragment thickness and area within each watershed.","language":"English","publisher":"Natural Areas Association","doi":"10.3375/0885-8608(2007)27[72:PBHFSF]2.0.CO;2","issn":"08858608","usgsCitation":"Carter, J., and Biagas, J., 2007, Prioritizing bottomland hardwood forest sites for protection and augmentation: Natural Areas Journal, v. 27, no. 1, p. 72-82, https://doi.org/10.3375/0885-8608(2007)27[72:PBHFSF]2.0.CO;2.","productDescription":"11 p.","startPage":"72","endPage":"82","numberOfPages":"11","costCenters":[{"id":455,"text":"National Wetlands Research Center","active":true,"usgs":true}],"links":[{"id":242688,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Arkansas","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -92.197265625,\n 33.89321737944089\n ],\n [\n -90.087890625,\n 33.89321737944089\n ],\n [\n -90.087890625,\n 36.16892253622743\n ],\n [\n -92.197265625,\n 36.16892253622743\n ],\n [\n -92.197265625,\n 33.89321737944089\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"27","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8c71e4b0c8380cd7e6bc","contributors":{"authors":[{"text":"Carter, J. 0000-0003-0110-0284 carterj@usgs.gov","orcid":"https://orcid.org/0000-0003-0110-0284","contributorId":81839,"corporation":false,"usgs":true,"family":"Carter","given":"J.","email":"carterj@usgs.gov","affiliations":[{"id":455,"text":"National Wetlands Research Center","active":true,"usgs":true}],"preferred":true,"id":433915,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Biagas, J. 0000-0001-5548-1970","orcid":"https://orcid.org/0000-0001-5548-1970","contributorId":51558,"corporation":false,"usgs":true,"family":"Biagas","given":"J.","affiliations":[],"preferred":false,"id":433914,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031745,"text":"70031745 - 2007 - Spatial and temporal migration patterns of Wilson's Warbler (Wilsonia pusilla) in the southwest as revealed by stable isotopes","interactions":[],"lastModifiedDate":"2017-11-25T13:54:37","indexId":"70031745","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3544,"text":"The Auk","onlineIssn":"1938-4254","printIssn":"0004-8038","active":true,"publicationSubtype":{"id":10}},"title":"Spatial and temporal migration patterns of Wilson's Warbler (Wilsonia pusilla) in the southwest as revealed by stable isotopes","docAbstract":"We used stable hydrogen isotopes (δD) to identify the breeding locations of Wilson’s Warbler (Wilsonia pusilla) migrating through five sites spanning a cross-section of the species’ southwestern migration route during the springs of 2003 and 2004. Determining the temporal and spatial patterns of migration and degree of population segregation during migration is critical to understanding long-term population trends of migrant birds. At all five migration sites, we found a significant negative relationship between the date Wilson’s Warblers passed through the sampling station and δD values of their feathers. These data were consistent with a pattern of “leap-frog” migration, in which individuals that bred the previous season at southern latitudes migrated through migration stations earlier than individuals that had previously bred at more northern latitudes. We documented that this pattern was consistent across sites and in multiple years. This finding corroborates previous research conducted on Wilson’s Warbler during the fall migration. In addition, mean δD values became more negative across sampling stations from west to east, with the mean δD values at each station corresponding to different geographic regions of the Wilson’s Warblers’ western breeding range. These data indicate that Wilson’s Warblers passing through each station represented a specific regional subset of the entire Wilson’s Warbler western breeding range. As a result, habitat alterations at specific areas across the east-west expanse of the bird’s migratory route in the southwestern United States could differentially affect Wilson’s Warblers at different breeding areas. This migration information is critical for management of Neotropical migrants, especially in light of the rapid changes presently occurring over the southwestern landscape.
","language":"English","publisher":"American Ornithological Society","doi":"10.1642/0004-8038(2007)124[162:SATMPO]2.0.CO;2","issn":"00048038","usgsCitation":"Paxton, K., van Riper, C., Theimer, T., and Paxton, E.H., 2007, Spatial and temporal migration patterns of Wilson's Warbler (Wilsonia pusilla) in the southwest as revealed by stable isotopes: The Auk, v. 124, no. 1, p. 162-175, https://doi.org/10.1642/0004-8038(2007)124[162:SATMPO]2.0.CO;2.","productDescription":"14 p.","startPage":"162","endPage":"175","costCenters":[],"links":[{"id":477143,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1642/0004-8038(2007)124[162:satmpo]2.0.co;2","text":"Publisher Index Page"},{"id":239775,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"124","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b943ce4b08c986b31a95a","contributors":{"authors":[{"text":"Paxton, K.L.","contributorId":78547,"corporation":false,"usgs":true,"family":"Paxton","given":"K.L.","email":"","affiliations":[],"preferred":false,"id":432947,"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":432946,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Theimer, T.C.","contributorId":31580,"corporation":false,"usgs":true,"family":"Theimer","given":"T.C.","affiliations":[],"preferred":false,"id":432945,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Paxton, E. H.","contributorId":16798,"corporation":false,"usgs":true,"family":"Paxton","given":"E.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":432944,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70031743,"text":"70031743 - 2007 - Chronology of Miocene-Pliocene deposits at Split Mountain Gorge, Southern California: A record of regional tectonics and Colorado River evolution","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031743","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":"Chronology of Miocene-Pliocene deposits at Split Mountain Gorge, Southern California: A record of regional tectonics and Colorado River evolution","docAbstract":"Late Miocene to early Pliocene deposit at Split Mountain Gorge, California, preserve a record of basinal response to changes in regional tectonics, paleogeography, and evolution of the Colorado River. The base of the Elephant Trees Formation, magnetostratigraphically dated as 8.1 ?? 0.4 Ma, provides the earliest well-dated record of extension in the southwestern Salton Trough. The oldest marine sediments are ca. 6.3 Ma. The nearly synchronous timing of marine incursion in the Salton Trough and northern Gulf of California region supports a model for localization of Pacific-North America plate motion in the Gulf ca. 6 Ma. The first appearance of Colorado River sand at the Miocene-Pliocene boundary (5.33 Ma) suggests rapid propagation of the river to the Salton Trough, and supports a lake-spillover hypothesis for initiation of the lower Colorado River. ?? 2007 Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/G23139A.1","issn":"00917613","usgsCitation":"Dorsey, R., Fluette, A., McDougall, K., Housen, B., Janecke, S.U., Axen, G., and Shirvell, C., 2007, Chronology of Miocene-Pliocene deposits at Split Mountain Gorge, Southern California: A record of regional tectonics and Colorado River evolution: Geology, v. 35, no. 1, p. 57-60, https://doi.org/10.1130/G23139A.1.","startPage":"57","endPage":"60","numberOfPages":"4","costCenters":[],"links":[{"id":239742,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212279,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/G23139A.1"}],"volume":"35","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f5f6e4b0c8380cd4c4fc","contributors":{"authors":[{"text":"Dorsey, R.J.","contributorId":45115,"corporation":false,"usgs":true,"family":"Dorsey","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":432935,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fluette, A.","contributorId":15832,"corporation":false,"usgs":true,"family":"Fluette","given":"A.","email":"","affiliations":[],"preferred":false,"id":432932,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McDougall, K.","contributorId":106260,"corporation":false,"usgs":true,"family":"McDougall","given":"K.","email":"","affiliations":[],"preferred":false,"id":432937,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Housen, B.A.","contributorId":37958,"corporation":false,"usgs":true,"family":"Housen","given":"B.A.","affiliations":[],"preferred":false,"id":432933,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Janecke, S. U.","contributorId":42296,"corporation":false,"usgs":true,"family":"Janecke","given":"S.","email":"","middleInitial":"U.","affiliations":[],"preferred":false,"id":432934,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Axen, G.J.","contributorId":10052,"corporation":false,"usgs":true,"family":"Axen","given":"G.J.","affiliations":[],"preferred":false,"id":432931,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Shirvell, C.R.","contributorId":62830,"corporation":false,"usgs":true,"family":"Shirvell","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":432936,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70031741,"text":"70031741 - 2007 - The geology of asbestos in the United States and its practical applications","interactions":[],"lastModifiedDate":"2022-03-23T16:38:57.747672","indexId":"70031741","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1574,"text":"Environmental & Engineering Geoscience","printIssn":"1078-7275","active":true,"publicationSubtype":{"id":10}},"title":"The geology of asbestos in the United States and its practical applications","docAbstract":"Recently, naturally occurring asbestos (NOA) has drawn the attention of numerous health and regulatory agencies and citizen groups. NOA can be released airborne by (1) the disturbance of asbestos-bearing bedrocks through human activities or natural weathering, and (2) the mining and milling of some mineral deposits in which asbestos occurs as an accessory mineral(s). Because asbestos forms in specific rock types and geologic conditions, this information can be used to focus on areas with the potential to contain asbestos, rather than devoting effort to areas with minimal NOA potential. All asbestos minerals contain magnesium, silica, and water as essential constituents, and some also contain major iron and/or calcium. Predictably, the geologic environments that host asbestos are enriched in these components. Most asbestos deposits form by metasomatic replacement of magnesium-rich rocks. Asbestos-forming environments typically display shear or evidence for a significant influx of silica-rich hydrothermal fluids. Asbestos-forming processes can be driven by regional metamorphism, contact metamorphism, or magmatic hydrothermal systems. Thus, asbestos deposits of all sizes and styles are typically hosted by magnesium-rich rocks (often also iron-rich) that were altered by a metamorphic or magmatic process. Rock types known to host asbestos include serpentinites, altered ultramafic and some mafic rocks, dolomitic marbles and metamorphosed dolostones, metamorphosed iron formations, and alkalic intrusions and carbonatites. Other rock types appear unlikely to contain asbestos. These geologic insights can be used by the mining industry, regulators, land managers, and others to focus attention on the critical locales most likely to contain asbestos.","language":"English","publisher":"Association of Environmental and Engineering Geologists","doi":"10.2113/gseegeosci.13.1.55","usgsCitation":"Van Gosen, B.S., 2007, The geology of asbestos in the United States and its practical applications: Environmental & Engineering Geoscience, v. 13, no. 1, p. 55-68, https://doi.org/10.2113/gseegeosci.13.1.55.","productDescription":"14 p.","startPage":"55","endPage":"68","numberOfPages":"14","ipdsId":"IP-014447","costCenters":[{"id":218,"text":"Denver Federal Center","active":false,"usgs":true}],"links":[{"id":239677,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"geometry\": {\n 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S. 0000-0003-4214-3811","orcid":"https://orcid.org/0000-0003-4214-3811","contributorId":97907,"corporation":false,"usgs":true,"family":"Van Gosen","given":"B.","middleInitial":"S.","affiliations":[],"preferred":false,"id":432927,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70031738,"text":"70031738 - 2007 - Morphological variation of siscowet lake trout in Lake Superior","interactions":[],"lastModifiedDate":"2016-04-29T10:43:51","indexId":"70031738","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":"Morphological variation of siscowet lake trout in Lake Superior","docAbstract":"Historically, Lake Superior has contained many morphologically distinct forms of the lake trout Salvelinus namaycush that have occupied specific depths and locations and spawned at specific times of the year. Today, as was probably the case historically, the siscowet morphotype is the most abundant. Recent interest in harvesting siscowets to extract oil containing omega-3 fatty acids will require additional knowledge of the biology and stock structure of these lightly exploited populations. The objective of this study was to determine whether shape differences exist among siscowet populations across Lake Superior and whether these shape differences can be used to infer stock structure. Morphometric analysis (truss protocol) was used to differentiate among siscowets sampled from 23 locations in Lake Superior. We analyzed 31 distance measurements among 14 anatomical landmarks taken from digital images of fish recorded in the field. Cluster analysis of size-corrected data separated fish into three geographic groups: The Isle Royale, eastern (Michigan), and western regions (Michigan). Finer scales of stock structure were also suggested. Discriminant function analysis demonstrated that head measurements contributed to most of the observed variation. Cross-validation classification rates indicated that 67–71% of individual fish were correctly classified to their region of capture. This is the first study to present shape differences associated with location within a lake trout morphotype in Lake Superior.
","language":"English","publisher":"Taylor & Francis","doi":"10.1577/T06-098.1","issn":"00028487","usgsCitation":"Bronte, C., and Moore, S., 2007, Morphological variation of siscowet lake trout in Lake Superior: Transactions of the American Fisheries Society, v. 136, no. 2, p. 509-517, https://doi.org/10.1577/T06-098.1.","productDescription":"9 p.","startPage":"509","endPage":"517","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":240155,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212639,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/T06-098.1"}],"volume":"136","issue":"2","noUsgsAuthors":false,"publicationDate":"2011-01-09","publicationStatus":"PW","scienceBaseUri":"505a5e46e4b0c8380cd70909","contributors":{"authors":[{"text":"Bronte, C.R.","contributorId":20100,"corporation":false,"usgs":true,"family":"Bronte","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":432919,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Moore, S.A.","contributorId":103397,"corporation":false,"usgs":true,"family":"Moore","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":432920,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031733,"text":"70031733 - 2007 - Toward a transport-based analysis of nutrient spiraling and uptake in streams","interactions":[],"lastModifiedDate":"2023-12-07T16:44:26.266653","indexId":"70031733","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2622,"text":"Limnology and Oceanography: Methods","active":true,"publicationSubtype":{"id":10}},"title":"Toward a transport-based analysis of nutrient spiraling and uptake in streams","docAbstract":"Nutrient addition experiments are designed to study the cycling of nutrients in stream ecosystems where hydrologic and nonhydrologic processes determine nutrient fate. Because of the importance of hydrologic processes in stream ecosystems, a conceptual model known as nutrient spiraling is frequently employed. A central part of the nutrient spiraling approach is the determination of uptake length (Sw), the average distance traveled by dissolved nutrients in the water column before uptake. Although the nutrient spiraling concept has been an invaluable tool in stream ecology, the current practice of estimating uptake length from steady‐state nutrient data using linear regression (called here the “Sw approach”) presents a number of limitations. These limitations are identified by comparing the exponential Sw equation with analytical solutions of a stream solute transport model. This comparison indicates that (1) Sw is an aggregate measure of uptake that does not distinguish between main channel and storage zone processes, (2) Sw is an integrated measure of numerous hydrologic and nonhydrologic processes—this process integration may lead to difficulties in interpretation when comparing estimates of Sw, and (3) estimates of uptake velocity and areal uptake rate (vf and U) based on Sw are not independent of system hydrology. Given these findings, a transport‐based approach to nutrient spiraling is presented for steady‐state and time‐series data sets. The transport‐based approach for time‐series data sets is suggested for future research on nutrient uptake as it provides a number of benefits, including the ability to (1) separately quantify main channel and storage zone uptake, (2) quantify specific hydrologic and nonhydrologic processes using various model parameters (process separation), (3) estimate uptake velocities and areal uptake rates that are independent of hydrologic effects, and (4) use shortterm, non‐plateau nutrient additions such that the effects of regeneration and mineralization are minimized. In summary, the transport‐based, time‐series approach provides a means of estimating traditional measures of nutrient uptake (Sw, vf , U) while providing additional information on the location and magnitude of uptake (main channel versus storage zone). Application of the transport‐based approach to time‐series data from Green Creek, Antarctica, indicates that the bulk of nitrate uptake (~74% to 100%) occurred within the main channel where benthic uptake by algal mats is a likely process. Substantial uptake (~26%) also occurred in the storage zone of one reach, where uptake is attributed to the microbial community.
","language":"English","publisher":"ASLO","doi":"10.4319/lom.2007.5.50","usgsCitation":"Runkel, R.L., 2007, Toward a transport-based analysis of nutrient spiraling and uptake in streams: Limnology and Oceanography: Methods, v. 5, no. 1, p. 50-62, https://doi.org/10.4319/lom.2007.5.50.","productDescription":"13 p.","startPage":"50","endPage":"62","numberOfPages":"13","costCenters":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240083,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-22","publicationStatus":"PW","scienceBaseUri":"505bb5b2e4b08c986b326834","contributors":{"authors":[{"text":"Runkel, Robert L. 0000-0003-3220-481X runkel@usgs.gov","orcid":"https://orcid.org/0000-0003-3220-481X","contributorId":685,"corporation":false,"usgs":true,"family":"Runkel","given":"Robert","email":"runkel@usgs.gov","middleInitial":"L.","affiliations":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"preferred":true,"id":432902,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70031721,"text":"70031721 - 2007 - Northeast Kansas well tests oil, gas possibilities in Precambrian rocks","interactions":[],"lastModifiedDate":"2018-02-18T13:45:10","indexId":"70031721","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2941,"text":"Oil & Gas Journal","printIssn":"0030-1388","active":true,"publicationSubtype":{"id":10}},"title":"Northeast Kansas well tests oil, gas possibilities in Precambrian rocks","docAbstract":"Tests for oil and gas prospects in Precambrian rocks in Northeast Kansas is currently being undertaken by WTW Operating LLC. It drilled in late 2005 the no.1 Wilson well with a depth of 5,772ft, 1,826ft into the Precambrian basement on a venture testing the possibility of oil and gas in the crystalline rocks. The basin extends northeast into Nebraska and Iowa and is a shallow cratonic basin filled with Paleozoic segments. The rocks have been previously though as not a potential for oil and gas due to the rocks' crystalline and nonporous character with the exception of the Midcontinent rift system (MRS). Later, though, small quantities of oil have been produced on the Central Kansas uplift from granite wash while the wells also produced low-Btu with swabbing operations. The recovered gas contained considerable nonflammable components of nitrogen, carbon dioxide and helium which equates to a low btu content of 283.","language":"English","publisher":"PennWell Corporation","publisherLocation":"Tulsa, OK","usgsCitation":"Merriam, D.F., Newell, K., Doveton, J., Magnuson, L., Lollar, B., and Waggoner, W., 2007, Northeast Kansas well tests oil, gas possibilities in Precambrian rocks: Oil & Gas Journal, v. 105, no. 35, p. 54-58.","productDescription":"5 p.","startPage":"54","endPage":"58","costCenters":[],"links":[{"id":239875,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":351771,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://www.ogj.com/articles/print/volume-105/issue-35/exploration-development/northeast-kansas-well-tests-oil-gas-possibilities-in-precambrian-rocks.html"}],"country":"United States","state":"Kansas","volume":"105","issue":"35","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a682ce4b0c8380cd73659","contributors":{"authors":[{"text":"Merriam, D. F.","contributorId":63175,"corporation":false,"usgs":true,"family":"Merriam","given":"D.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":432855,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Newell, K.D.","contributorId":76473,"corporation":false,"usgs":true,"family":"Newell","given":"K.D.","email":"","affiliations":[],"preferred":false,"id":432856,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Doveton, J.H.","contributorId":30237,"corporation":false,"usgs":true,"family":"Doveton","given":"J.H.","email":"","affiliations":[],"preferred":false,"id":432854,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Magnuson, L.M.","contributorId":16974,"corporation":false,"usgs":true,"family":"Magnuson","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":432852,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lollar, B.S.","contributorId":24532,"corporation":false,"usgs":true,"family":"Lollar","given":"B.S.","email":"","affiliations":[],"preferred":false,"id":432853,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Waggoner, W.M.","contributorId":6666,"corporation":false,"usgs":true,"family":"Waggoner","given":"W.M.","email":"","affiliations":[],"preferred":false,"id":432851,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70031719,"text":"70031719 - 2007 - Intra- and interlaboratory variability in acute toxicity tests with glochidia and juveniles of freshwater mussels (Unionidae)","interactions":[],"lastModifiedDate":"2016-06-01T16:52:21","indexId":"70031719","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Intra- and interlaboratory variability in acute toxicity tests with glochidia and juveniles of freshwater mussels (Unionidae)","docAbstract":"The present study evaluated the performance and variability in acute toxicity tests with glochidia and newly transformed juvenile mussels using the standard methods outlined in American Society for Testing and Materials (ASTM). Multiple 48-h toxicity tests with glochidia and 96-h tests with juvenile mussels were conducted within a single laboratory and among five laboratories. All tests met the test acceptability requirements (e.g., ???90% control survival). Intralaboratory tests were conducted over two consecutive mussel-spawning seasons with mucket (Actinonaias ligamentina) or fatmucket (Lampsilis siliquoidea) using copper, ammonia, or chlorine as a toxicant. For the glochidia of both species, the variability of intralaboratory median effective concentrations (EC50s) for the three toxicants, expressed as the coefficient of variation (CV), ranged from 14 to 27% in 24-h exposures and from 13 to 36% in 48-h exposures. The intralaboratory CV of copper EC50s for juvenile fatmucket was 24% in 48-h exposures and 13% in 96-h exposures. Interlaboratory tests were conducted with fatmucket glochidia and juveniles by five laboratories using copper as a toxicant. The interlaboratory CV of copper EC50s for glochidia was 13% in 24-h exposures and 24% in 48-h exposures, and the interlaboratory CV for juveniles was 22% in 48-h exposures and 42% in 96-h exposures. The high completion success and the overall low variability in test results indicate that the test methods have acceptable precision and can be performed routinely. ?? 2007 SETAC.
","language":"English","publisher":"Wiley","doi":"10.1897/06-520R.1","issn":"07307268","usgsCitation":"Wang, N., Augspurger, T., Barnhart, M., Bidwell, J.R., Cope, W., Dwyer, F., Geis, S., Greer, I., Ingersoll, C., Kane, C., May, T., Neves, R.J., Newton, T., Roberts, A., and Whites, D., 2007, Intra- and interlaboratory variability in acute toxicity tests with glochidia and juveniles of freshwater mussels (Unionidae): Environmental Toxicology and Chemistry, v. 26, no. 10, p. 2029-2035, https://doi.org/10.1897/06-520R.1.","productDescription":"7 p.","startPage":"2029","endPage":"2035","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"links":[{"id":477181,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1897/06-520r.1","text":"Publisher Index Page"},{"id":239839,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212366,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/06-520R.1"}],"volume":"26","issue":"10","noUsgsAuthors":false,"publicationDate":"2007-10-01","publicationStatus":"PW","scienceBaseUri":"505a3db9e4b0c8380cd637ba","contributors":{"authors":[{"text":"Wang, N.","contributorId":81615,"corporation":false,"usgs":true,"family":"Wang","given":"N.","email":"","affiliations":[],"preferred":false,"id":432841,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Augspurger, T.","contributorId":81844,"corporation":false,"usgs":false,"family":"Augspurger","given":"T.","email":"","affiliations":[],"preferred":false,"id":432842,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Barnhart, M.C.","contributorId":107410,"corporation":false,"usgs":true,"family":"Barnhart","given":"M.C.","affiliations":[],"preferred":false,"id":432847,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bidwell, Joseph R.","contributorId":105122,"corporation":false,"usgs":true,"family":"Bidwell","given":"Joseph","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":432846,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cope, W.G.","contributorId":71918,"corporation":false,"usgs":true,"family":"Cope","given":"W.G.","email":"","affiliations":[],"preferred":false,"id":432839,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Dwyer, F.J.","contributorId":107818,"corporation":false,"usgs":true,"family":"Dwyer","given":"F.J.","email":"","affiliations":[],"preferred":false,"id":432848,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Geis, S.","contributorId":90112,"corporation":false,"usgs":true,"family":"Geis","given":"S.","email":"","affiliations":[],"preferred":false,"id":432844,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Greer, I.E.","contributorId":70182,"corporation":false,"usgs":true,"family":"Greer","given":"I.E.","email":"","affiliations":[],"preferred":false,"id":432838,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Ingersoll, C.G. 0000-0003-4531-5949","orcid":"https://orcid.org/0000-0003-4531-5949","contributorId":56338,"corporation":false,"usgs":true,"family":"Ingersoll","given":"C.G.","affiliations":[],"preferred":false,"id":432837,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Kane, C.M.","contributorId":20140,"corporation":false,"usgs":true,"family":"Kane","given":"C.M.","email":"","affiliations":[],"preferred":false,"id":432834,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"May, T.W.","contributorId":75878,"corporation":false,"usgs":true,"family":"May","given":"T.W.","email":"","affiliations":[],"preferred":false,"id":432840,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Neves, R. J.","contributorId":30936,"corporation":false,"usgs":true,"family":"Neves","given":"R.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":432835,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Newton, T.J.","contributorId":104428,"corporation":false,"usgs":true,"family":"Newton","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":432845,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Roberts, A.D.","contributorId":87757,"corporation":false,"usgs":true,"family":"Roberts","given":"A.D.","email":"","affiliations":[],"preferred":false,"id":432843,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Whites, D.W.","contributorId":52367,"corporation":false,"usgs":true,"family":"Whites","given":"D.W.","affiliations":[],"preferred":false,"id":432836,"contributorType":{"id":1,"text":"Authors"},"rank":15}]}} ,{"id":70031710,"text":"70031710 - 2007 - Evidence of widespread natural reproduction by lake trout Salvelinus namaycush in the Michigan waters of Lake Huron","interactions":[],"lastModifiedDate":"2016-04-28T13:39:56","indexId":"70031710","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2330,"text":"Journal of Great Lakes Research","active":true,"publicationSubtype":{"id":10}},"title":"Evidence of widespread natural reproduction by lake trout Salvelinus namaycush in the Michigan waters of Lake Huron","docAbstract":"Localized natural reproduction of lake trout Salvelinus namaycush in Lake Huron has occurred since the 1980s near Thunder Bay, Michigan. During 2004–2006, USGS spring and fall bottom trawl surveys captured 63 wild juvenile lake trout at depths ranging from 37–73 m at four of five ports in the Michigan waters of the main basin of Lake Huron, more than five times the total number captured in the previous 30-year history of the surveys. Relatively high catches of wild juvenile lake trout in bottom trawls during 2004–2006 suggest that natural reproduction by lake trout has increased and occurred throughout the Michigan waters of the main basin. Increased catches of wild juvenile lake trout in the USGS fall bottom trawl survey were coincident with a drastic decline in alewife abundance, but data were insufficient to determine what mechanism may be responsible for increased natural reproduction by lake trout. We recommend further monitoring of juvenile lake trout abundance and research into early life history of lake trout in Lake Huron.
","language":"English","publisher":"International Association for Great Lakes Research","doi":"10.3394/0380-1330(2007)33[917:EOWNRB]2.0.CO;2","issn":"03801330","usgsCitation":"Riley, S., He, J., Johnson, J., O’Brien, T.P., and Schaeffer, J., 2007, Evidence of widespread natural reproduction by lake trout Salvelinus namaycush in the Michigan waters of Lake Huron: Journal of Great Lakes Research, v. 33, no. 4, p. 917-921, https://doi.org/10.3394/0380-1330(2007)33[917:EOWNRB]2.0.CO;2.","productDescription":"5 p.","startPage":"917","endPage":"921","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":239710,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212250,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3394/0380-1330(2007)33[917:EOWNRB]2.0.CO;2"}],"volume":"33","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d70e4b0c8380cd53007","contributors":{"authors":[{"text":"Riley, S.C.","contributorId":71378,"corporation":false,"usgs":true,"family":"Riley","given":"S.C.","email":"","affiliations":[],"preferred":false,"id":432792,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"He, J.X.","contributorId":7901,"corporation":false,"usgs":true,"family":"He","given":"J.X.","email":"","affiliations":[],"preferred":false,"id":432788,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Johnson, J.E.","contributorId":44857,"corporation":false,"usgs":true,"family":"Johnson","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":432791,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"O’Brien, T. P.","contributorId":22146,"corporation":false,"usgs":true,"family":"O’Brien","given":"T.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":432789,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Schaeffer, J.S.","contributorId":42688,"corporation":false,"usgs":true,"family":"Schaeffer","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":432790,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ]}