{"pageNumber":"968","pageRowStart":"24175","pageSize":"25","recordCount":40811,"records":[{"id":70030029,"text":"70030029 - 2007 - Effect of bedrock permeability on subsurface stormflow and the water balance of a trenched hillslope at the Panola Mountain Research Watershed, Georgia, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:36","indexId":"70030029","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1924,"text":"Hydrological Processes","active":true,"publicationSubtype":{"id":10}},"title":"Effect of bedrock permeability on subsurface stormflow and the water balance of a trenched hillslope at the Panola Mountain Research Watershed, Georgia, USA","docAbstract":"The effect of bedrock permeability on subsurface stormflow initiation and the hillslope water balance is poorly understood. Previous hillslope hydrological studies at the Panola Mountain Research Watershed (PMRW), Georgia, USA, have assumed that the bedrock underlying the trenched hillslope is effectively impermeable. This paper presents a series of sprinkling experiments where we test the bedrock impermeability hypothesis at the PMRW. Specifically, we quantify the bedrock permeability effects on hillslope subsurface stormflow generation and the hillslope water balance at the PMRW. Five sprinkling experiments were performed by applying 882-1676 mm of rainfall over a ???5.5 m ?? 12 m area on the lower hillslope during ???8 days. In addition to water input and output captured at the trench, we measured transpiration in 14 trees on the slope to close the water balance. Of the 193 mm day-1 applied during the later part of the sprinkling experiments when soil moisture changes were small, < 14 mm day-1 was collected at the trench and <4 mm day-1 was transpired by the trees, with residual bedrock leakage of > 175 mm day-1 (91%). Bedrock moisture was measured at three locations downslope of the water collection system in the trench. Bedrock moisture responded quickly to precipitation in early spring. Peak tracer breakthrough in response to natural precipitation in the bedrock downslope from the trench was delayed only 2 days relative to peak tracer arrival in subsurface stormflow at the trench. Leakage to bedrock influences subsurface stormflow at the storm time-scale and also the water balance of the hillslope. This has important implications for the age and geochemistry of the water and thus how one models this hillslope and watershed. Copyright ?? 2006 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrological Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/hyp.6265","issn":"08856087","usgsCitation":"Tromp-van, M.H., Peters, N., and McDonnell, J.J., 2007, Effect of bedrock permeability on subsurface stormflow and the water balance of a trenched hillslope at the Panola Mountain Research Watershed, Georgia, USA: Hydrological Processes, v. 21, no. 6, p. 750-769, https://doi.org/10.1002/hyp.6265.","startPage":"750","endPage":"769","numberOfPages":"20","costCenters":[],"links":[{"id":213101,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.6265"},{"id":240692,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"21","issue":"6","noUsgsAuthors":false,"publicationDate":"2006-09-22","publicationStatus":"PW","scienceBaseUri":"505a05c2e4b0c8380cd50f43","contributors":{"authors":[{"text":"Tromp-van, Meerveld H. J. H. J.","contributorId":54710,"corporation":false,"usgs":true,"family":"Tromp-van","given":"Meerveld","suffix":"H. J.","email":"","middleInitial":"H. J.","affiliations":[],"preferred":false,"id":425391,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Peters, N.E.","contributorId":33332,"corporation":false,"usgs":true,"family":"Peters","given":"N.E.","email":"","affiliations":[],"preferred":false,"id":425390,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McDonnell, Jeffery J. 0000-0002-3880-3162","orcid":"https://orcid.org/0000-0002-3880-3162","contributorId":62723,"corporation":false,"usgs":false,"family":"McDonnell","given":"Jeffery","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":425392,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030033,"text":"70030033 - 2007 - Evidence for prosauropod dinosaur gastroliths in the Bull Run Formation (Upper Triassic, Norian) of Virginia","interactions":[],"lastModifiedDate":"2018-03-06T14:49:12","indexId":"70030033","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1965,"text":"Ichnos: An International Journal for Plant and Animal Traces","onlineIssn":"1563-5236","printIssn":"1042-0940","active":true,"publicationSubtype":{"id":10}},"title":"Evidence for prosauropod dinosaur gastroliths in the Bull Run Formation (Upper Triassic, Norian) of Virginia","docAbstract":"<p>Definitive criteria for distinguishing gastroliths from sedimentary clasts are lacking for many depositional settings, and many reported occurrences of gastroliths either cannot be verified or have been refuted. We discuss four occurrences of gastrolith-like stones (category 6 exoliths) not found within skeletal remains from the Upper Triassic Bull Run Formation of northern Virginia, USA. Despite their lack of obvious skeletal association, the most parsimonious explanation for several characteristics of these stones is their prolonged residence in the gastric mills of large animals. These characteristics include 1) typical gastrolith microscopic surface texture, 2) evidence of pervasive surface wear on many of these stones that has secondarily removed variable amounts of thick weathering rinds typically found on these stones, and 3) a width/length-ratio modal peak for these stones that is more strongly developed than in any population of fluvial or fanglomerate stones of any age found in this region. When taken together, these properties of the stones can be explained most parsimoniously by animal ingestion and gastric-mill abrasion. The size of these stones indicates the animals that swallowed them were large, and the best candidate is a prosauropod dinosaur, possibly an ancestor of the Early Jurassic gastrolith-producing prosauropod<span>&nbsp;</span><i>Massospondylus</i><span>&nbsp;</span>or<span>&nbsp;</span><i>Ammosaurus</i>.</p><p>Skeletal evidence for Upper Triassic prosauropods is lacking in the Newark Supergroup basins; footprints (<i>Agrestipus hottoni</i><span>&nbsp;</span>and<span>&nbsp;</span><i>Eubrontes</i><span>&nbsp;</span>isp.) from the Bull Run Formation in the Culpeper basin previously ascribed to prosauropods are now known to be underprints (<i>Brachychirotherium parvum</i>) of an aetosaur and underprints (<i>Kayentapus minor</i>) of a ceratosaur. The absence of prosauropod skeletal remains or footprints in all but the uppermost (upper Rhaetian) Triassic rocks of the Newark Supergroup is puzzling because prosauropod remains are abundant elsewhere in the world in Upper Triassic (Carnian, Norian, and lower Rhaetian) continental strata. The apparent scarcity of prosauropods in Upper Triassic strata of the Newark Supergroup is interpreted as an artifact of ecological partitioning, created by the habitat range and dietary preferences of phytosaurs and by the preservational biases at that time within the lithofacies of the Newark Supergroup basins.</p>","language":"English","publisher":"Taylor & Francis","doi":"10.1080/10420940601050030","usgsCitation":"Weems, R.E., Culp, M.J., and Wings, O., 2007, Evidence for prosauropod dinosaur gastroliths in the Bull Run Formation (Upper Triassic, Norian) of Virginia: Ichnos: An International Journal for Plant and Animal Traces, v. 14, no. 3-4, p. 271-295, https://doi.org/10.1080/10420940601050030.","productDescription":"25 p.","startPage":"271","endPage":"295","costCenters":[],"links":[{"id":240221,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Virginia","volume":"14","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d50e4b0c8380cd52f3f","contributors":{"authors":[{"text":"Weems, Robert E. 0000-0002-1907-7804 rweems@usgs.gov","orcid":"https://orcid.org/0000-0002-1907-7804","contributorId":2663,"corporation":false,"usgs":true,"family":"Weems","given":"Robert","email":"rweems@usgs.gov","middleInitial":"E.","affiliations":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true},{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"preferred":true,"id":425404,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Culp, Michelle J.","contributorId":80083,"corporation":false,"usgs":false,"family":"Culp","given":"Michelle","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":425406,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wings, Oliver","contributorId":49604,"corporation":false,"usgs":false,"family":"Wings","given":"Oliver","email":"","affiliations":[],"preferred":false,"id":425405,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030038,"text":"70030038 - 2007 - Development of the California Current during the past 12,000 yr based on diatoms and silicoflagellates","interactions":[],"lastModifiedDate":"2022-12-05T17:49:12.10361","indexId":"70030038","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2996,"text":"Palaeogeography, Palaeoclimatology, Palaeoecology","printIssn":"0031-0182","active":true,"publicationSubtype":{"id":10}},"title":"Development of the California Current during the past 12,000 yr based on diatoms and silicoflagellates","docAbstract":"<p><span>Detailed diatom and silicoflagellates records in three cores from the offshore region of southern Oregon to central California reveal the evolution of the northern part of the California Current during the past 12,000&nbsp;yr. The early Holocene, prior to ∼</span><span>&nbsp;</span><span>9&nbsp;ka, was characterized by relatively warm sea surface temperatures (SST), owing to enhanced northerly flow of the subtropical waters comparable to the modern Davidson Current. Progressive strengthening of the North Pacific High lead to intensification of the southward flow of the California Current at ∼</span><span>&nbsp;</span><span>8&nbsp;ka, resulting in increased coastal upwelling and relatively cooler SST which persisted until ∼</span><span>&nbsp;</span><span>5&nbsp;ka. Reduced southward flow of the California Current between ∼</span><span>&nbsp;</span><span>4.8&nbsp;ka and 3.6&nbsp;ka may have been responsible for a period of decreased upwelling. Modern seasonal oceanographic cycles, as evidenced by increased spring–early summer coastal upwelling and warming of early fall SST evolved between 3.5 and 3.2&nbsp;ka. Widespread occurrence of paleoceanographic and paleoclimatic change between ∼</span><span>&nbsp;</span><span>3.5–3.0&nbsp;ka&nbsp;along the eastern margins of the North Pacific was likely a response to increasing ENSO variability in the tropical Pacific.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.palaeo.2006.12.009","usgsCitation":"Barron, J.A., and Bukry, D., 2007, Development of the California Current during the past 12,000 yr based on diatoms and silicoflagellates: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 248, no. 3-4, p. 313-338, https://doi.org/10.1016/j.palaeo.2006.12.009.","productDescription":"26 p.","startPage":"313","endPage":"338","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"links":[{"id":240292,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California, Oregon","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -123.134765625,\n              43.58039085560784\n            ],\n            [\n              -124.5849609375,\n              43.70759350405294\n            ],\n            [\n              -124.76074218749999,\n              42.293564192170095\n            ],\n            [\n              -124.62890625,\n              41.50857729743935\n            ],\n            [\n              -124.5849609375,\n              39.36827914916014\n            ],\n            [\n              -122.51953124999999,\n              36.27970720524017\n            ],\n            [\n              -121.46484375,\n              35.06597313798418\n            ],\n            [\n              -120.05859375,\n              36.13787471840729\n            ],\n            [\n              -121.640625,\n              37.43997405227057\n            ],\n            [\n              -123.00292968749999,\n              40.51379915504413\n            ],\n            [\n              -123.134765625,\n              43.58039085560784\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"248","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0068e4b0c8380cd4f751","contributors":{"authors":[{"text":"Barron, John A. 0000-0002-9309-1145 jbarron@usgs.gov","orcid":"https://orcid.org/0000-0002-9309-1145","contributorId":2222,"corporation":false,"usgs":true,"family":"Barron","given":"John","email":"jbarron@usgs.gov","middleInitial":"A.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":425420,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bukry, David 0000-0003-4540-890X","orcid":"https://orcid.org/0000-0003-4540-890X","contributorId":30980,"corporation":false,"usgs":true,"family":"Bukry","given":"David","affiliations":[],"preferred":false,"id":425419,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030039,"text":"70030039 - 2007 - Simple predictions of maximum transport rate in unsaturated soil and rock","interactions":[],"lastModifiedDate":"2018-10-17T09:16:27","indexId":"70030039","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Simple predictions of maximum transport rate in unsaturated soil and rock","docAbstract":"<p><span>In contrast with the extreme variability expected for water and contaminant fluxes in the unsaturated zone, evidence from 64 field tests of preferential flow indicates that the maximum transport speed&nbsp;</span><i>V</i><sub>max</sub><span>, adjusted for episodicity of infiltration, deviates little from a geometric mean of 13 m/d. A model based on constant‐speed travel during infiltration pulses of actual or estimated duration can predict<span>&nbsp;</span></span><i>V</i><sub>max</sub><span><span>&nbsp;</span>with approximate order‐of‐magnitude accuracy, irrespective of medium or travel distance, thereby facilitating such problems as the prediction of worst‐case contaminant traveltimes. The lesser variability suggests that preferential flow is subject to rate‐limiting mechanisms analogous to those that impose a terminal velocity on objects in free fall and to rate‐compensating mechanisms analogous to Le Chatlier's principle. A critical feature allowing such mechanisms to dominate may be the presence of interfacial boundaries confined by neither solid material nor capillary forces.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006WR005372","usgsCitation":"Nimmo, J.R., 2007, Simple predictions of maximum transport rate in unsaturated soil and rock: Water Resources Research, v. 43, no. 5, W05426; 11 p., https://doi.org/10.1029/2006WR005372.","productDescription":"W05426; 11 p.","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":477005,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006wr005372","text":"Publisher Index Page"},{"id":240293,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"5","noUsgsAuthors":false,"publicationDate":"2007-05-22","publicationStatus":"PW","scienceBaseUri":"505b8f6ee4b08c986b318f17","contributors":{"authors":[{"text":"Nimmo, John R. 0000-0001-8191-1727 jrnimmo@usgs.gov","orcid":"https://orcid.org/0000-0001-8191-1727","contributorId":757,"corporation":false,"usgs":true,"family":"Nimmo","given":"John","email":"jrnimmo@usgs.gov","middleInitial":"R.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":425421,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70030047,"text":"70030047 - 2007 - Thermal criteria for early life stage development of the winged mapleleaf mussel (Quadrilla fragosa)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:09","indexId":"70030047","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":737,"text":"American Midland Naturalist","active":true,"publicationSubtype":{"id":10}},"title":"Thermal criteria for early life stage development of the winged mapleleaf mussel (Quadrilla fragosa)","docAbstract":"The winged mapleleaf mussel [Quadrula fragosa (Conrad)] is a Federal endangered species. Controlled propagation to aid in recovering this species has been delayed because host fishes for its parasitic glochidia (larvae) are unknown. This study identified blue catfish [Ictaluris furcatus (Lesueur)] and confirmed channel catfish [Ictaluris punctatus (Rafinesque)] as suitable hosts. The time required for glochidia to metamorphose and for peak juvenile excystment to begin was water temperature dependent and ranged from 28 to 37 d in a constant thermal regime (19 C); totaled 70 d in a varied thermal regime (12-19 C); and ranged 260 to 262 d in simulated natural thermal regimes (0-21 C). We developed a quantitative model that describes the thermal-temporal relation and used it to empirically estimate the species-specific low-temperature threshold for development of glochidia into juveniles on channel catfish (9.26 C) and the cumulative temperature units of development required to achieve peak excystment of juveniles from blue catfish (383 C???d) and channel catfish (395 C???d). Long-term tests simulated the development of glochidia into juveniles in natural thermal regimes and consistently affirmed the validity of these estimates, as well as provided evidence for a thermal cue (17-20 C) that presumably is needed to trigger peak juvenile excystment. These findings substantiate our model and provide an approach that could be used to determine corresponding thermal criteria for early life development of other mussel species. These data can be used to improve juvenile mussel production in propagation programs designed to help recover imperiled species and may also be useful in detecting temporal climatic changes within a watershed.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Midland Naturalist","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1674/0003-0031(2007)157[297:TCFELS]2.0.CO;2","issn":"00030031","usgsCitation":"Steingraeber, M., Bartsch, M., Kalas, J., and Newton, T., 2007, Thermal criteria for early life stage development of the winged mapleleaf mussel (Quadrilla fragosa): American Midland Naturalist, v. 157, no. 2, p. 297-311, https://doi.org/10.1674/0003-0031(2007)157[297:TCFELS]2.0.CO;2.","startPage":"297","endPage":"311","numberOfPages":"15","costCenters":[],"links":[{"id":212874,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1674/0003-0031(2007)157[297:TCFELS]2.0.CO;2"},{"id":240433,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"157","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb21ae4b08c986b3255d2","contributors":{"authors":[{"text":"Steingraeber, M.T.","contributorId":106192,"corporation":false,"usgs":true,"family":"Steingraeber","given":"M.T.","email":"","affiliations":[],"preferred":false,"id":425456,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bartsch, M.R.","contributorId":42908,"corporation":false,"usgs":true,"family":"Bartsch","given":"M.R.","email":"","affiliations":[],"preferred":false,"id":425453,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kalas, J.E.","contributorId":49607,"corporation":false,"usgs":true,"family":"Kalas","given":"J.E.","affiliations":[],"preferred":false,"id":425454,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Newton, T.J.","contributorId":104428,"corporation":false,"usgs":true,"family":"Newton","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":425455,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030048,"text":"70030048 - 2007 - Unconventional shale-gas systems: The Mississippian Barnett Shale of north-central Texas as one model for thermogenic shale-gas assessment","interactions":[],"lastModifiedDate":"2012-03-12T17:21:09","indexId":"70030048","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":701,"text":"American Association of Petroleum Geologists Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Unconventional shale-gas systems: The Mississippian Barnett Shale of north-central Texas as one model for thermogenic shale-gas assessment","docAbstract":"Shale-gas resource plays can be distinguished by gas type and system characteristics. The Newark East gas field, located in the Fort Worth Basin, Texas, is defined by thermogenic gas production from low-porosity and low-permeability Barnett Shale. The Barnett Shale gas system, a self-contained source-reservoir system, has generated large amounts of gas in the key productive areas because of various characteristics and processes, including (1) excellent original organic richness and generation potential; (2) primary and secondary cracking of kerogen and retained oil, respectively; (3) retention of oil for cracking to gas by adsorption; (4) porosity resulting from organic matter decomposition; and (5) brittle mineralogical composition. The calculated total gas in place (GIP) based on estimated ultimate recovery that is based on production profiles and operator estimates is about 204 bcf/section (5.78 ?? 109 m3/1.73 ?? 104 m3). We estimate that the Barnett Shale has a total generation potential of about 609 bbl of oil equivalent/ac-ft or the equivalent of 3657 mcf/ac-ft (84.0 m3/m3). Assuming a thickness of 350 ft (107 m) and only sufficient hydrogen for partial cracking of retained oil to gas, a total generation potential of 820 bcf/section is estimated. Of this potential, approximately 60% was expelled, and the balance was retained for secondary cracking of oil to gas, if sufficient thermal maturity was reached. Gas storage capacity of the Barnett Shale at typical reservoir pressure, volume, and temperature conditions and 6% porosity shows a maximum storage capacity of 540 mcf/ac-ft or 159 scf/ton. Copyright ?? 2007. The American Association of Petroleum Geologists. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Association of Petroleum Geologists Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1306/12190606068","issn":"01491423","usgsCitation":"Jarvie, D., Hill, R., Ruble, T., and Pollastro, R.M., 2007, Unconventional shale-gas systems: The Mississippian Barnett Shale of north-central Texas as one model for thermogenic shale-gas assessment: American Association of Petroleum Geologists Bulletin, v. 91, no. 4, p. 475-499, https://doi.org/10.1306/12190606068.","startPage":"475","endPage":"499","numberOfPages":"25","costCenters":[],"links":[{"id":212875,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1306/12190606068"},{"id":240434,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bbc2ee4b08c986b328aae","contributors":{"authors":[{"text":"Jarvie, D.M.","contributorId":69768,"corporation":false,"usgs":true,"family":"Jarvie","given":"D.M.","email":"","affiliations":[],"preferred":false,"id":425459,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hill, R.J.","contributorId":92850,"corporation":false,"usgs":true,"family":"Hill","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":425460,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ruble, T.E.","contributorId":30402,"corporation":false,"usgs":true,"family":"Ruble","given":"T.E.","email":"","affiliations":[],"preferred":false,"id":425458,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Pollastro, R. M.","contributorId":6809,"corporation":false,"usgs":true,"family":"Pollastro","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":425457,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030050,"text":"70030050 - 2007 - Glacier changes in southeast Alaska and northwest British Columbia and contribution to sea level rise","interactions":[],"lastModifiedDate":"2012-03-12T17:21:09","indexId":"70030050","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2318,"text":"Journal of Geophysical Research F: Earth Surface","active":true,"publicationSubtype":{"id":10}},"title":"Glacier changes in southeast Alaska and northwest British Columbia and contribution to sea level rise","docAbstract":"The digital elevation model (DEM) from the 2000 Shuttle Radar Topography Mission (SRTM) was differenced from a composite DEM based on air photos dating from 1948 to 1987 to detennine glacier volume changes in southeast Alaska and adjoining Canada. SRTM accuracy was assessed at ??5 in through comparison with airborne laser altimetry and control locations measured with GPS. Glacier surface elevations lowered over 95% of the 14,580 km2 glacier-covered area analyzed, with some glaciers thinning as much as 640 in. A combination of factors have contributed to this wastage, including calving retreats of tidewater and lacustrine glaciers and climate change. Many glaciers in this region are particularly sensitive to climate change, as they have large areas at low elevations. However, several tidewater glaciers that had historically undergone calving retreats are now expanding and appear to be in the advancing stage of the tidewater glacier cycle. The net average rate of ice loss is estimated at 16.7 ?? 4.4 km3/yr, equivalent to a global sea level rise contribution of 0.04 ?? 0.01 mm/yr. Copyright 2007 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research F: Earth Surface","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2006JF000586","issn":"01480227","usgsCitation":"Larsen, C., Motyka, R., Arendt, A., Echelmeyer, K., and Geissler, P., 2007, Glacier changes in southeast Alaska and northwest British Columbia and contribution to sea level rise: Journal of Geophysical Research F: Earth Surface, v. 112, no. 1, https://doi.org/10.1029/2006JF000586.","costCenters":[],"links":[{"id":477126,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006jf000586","text":"Publisher Index Page"},{"id":240467,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212902,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2006JF000586"}],"volume":"112","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-02-24","publicationStatus":"PW","scienceBaseUri":"505a2914e4b0c8380cd5a66a","contributors":{"authors":[{"text":"Larsen, C.F.","contributorId":96091,"corporation":false,"usgs":true,"family":"Larsen","given":"C.F.","email":"","affiliations":[],"preferred":false,"id":425468,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Motyka, R.J.","contributorId":49594,"corporation":false,"usgs":true,"family":"Motyka","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":425466,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Arendt, A.A.","contributorId":99379,"corporation":false,"usgs":false,"family":"Arendt","given":"A.A.","email":"","affiliations":[{"id":12920,"text":"Applied Physics Laboratory, University of Washington","active":true,"usgs":false}],"preferred":false,"id":425469,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Echelmeyer, K.A.","contributorId":11781,"corporation":false,"usgs":true,"family":"Echelmeyer","given":"K.A.","email":"","affiliations":[],"preferred":false,"id":425465,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Geissler, P.E.","contributorId":67636,"corporation":false,"usgs":true,"family":"Geissler","given":"P.E.","email":"","affiliations":[],"preferred":false,"id":425467,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030052,"text":"70030052 - 2007 - A multi-scale examination of stopover habitat use by birds","interactions":[],"lastModifiedDate":"2012-03-12T17:21:09","indexId":"70030052","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"A multi-scale examination of stopover habitat use by birds","docAbstract":"Most of our understanding of habitat use by migrating land birds comes from studies conducted at single, small spatial scales, which may overemphasize the importance of intrinsic habitat factors, such as food availability, in shaping migrant distributions. We believe that a multi-scale approach is essential to assess the influence of factors that control en route habitat use. We determined the relative importance of eight variables, each operating at a habitat-patch, landscape, or regional spatial scale, in explaining the differential use of hardwood forests by Nearctic-Neotropical land birds during migration. We estimated bird densities through transect surveys at sites near the Mississippi coast during spring and autumn migration within landscapes with variable amounts of hardwood forest cover. At a regional scale, migrant density increased with proximity to the coast, which was of moderate importance in explaining bird densities, probably due to constraints imposed on migrants when negotiating the Gulf of Mexico. The amount of hardwood forest cover at a landscape scale was positively correlated with arthropod abundance and had the greatest importance in explaining densities of all migrants, as a group, during spring, and of insectivorous migrants during autumn. Among landscape scales ranging from 500 m to 10 km radius, the densities of migrants were, on average, most strongly and positively related to the amount of hardwood forest cover within a 5 km radius. We suggest that hardwood forest cover at this scale may be an indicator of habitat quality that migrants use as a cue when landing at the end of a migratory flight. At the patch scale, direct measures of arthropod abundance and plant community composition were also important in explaining migrant densities, whereas habitat structure was of little importance. The relative amount of fleshy-fruited trees was positively related and was the most important variable explaining frugivorous migrant density during autumn. Although constraints extrinsic to habitat had a moderate role in explaining migrant distributions, our results are consistent with the view that food availability is the ultimate factor shaping the distributions of birds during stopover. ?? 2007 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/06-1871.1","issn":"00129658","usgsCitation":"Buler, J., Moore, F., and Woltmann, S., 2007, A multi-scale examination of stopover habitat use by birds: Ecology, v. 88, no. 7, p. 1789-1802, https://doi.org/10.1890/06-1871.1.","startPage":"1789","endPage":"1802","numberOfPages":"14","costCenters":[],"links":[{"id":212934,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/06-1871.1"},{"id":240502,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"88","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e48be4b0c8380cd466e8","contributors":{"authors":[{"text":"Buler, J.J.","contributorId":13039,"corporation":false,"usgs":true,"family":"Buler","given":"J.J.","email":"","affiliations":[],"preferred":false,"id":425475,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Moore, F.R.","contributorId":48762,"corporation":false,"usgs":true,"family":"Moore","given":"F.R.","email":"","affiliations":[],"preferred":false,"id":425477,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Woltmann, S.","contributorId":47588,"corporation":false,"usgs":true,"family":"Woltmann","given":"S.","affiliations":[],"preferred":false,"id":425476,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030054,"text":"70030054 - 2007 - Intertidal sand body migration along a megatidal coast, Kachemak Bay, Alaska","interactions":[],"lastModifiedDate":"2023-08-03T11:29:15.58499","indexId":"70030054","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2318,"text":"Journal of Geophysical Research F: Earth Surface","active":true,"publicationSubtype":{"id":10}},"title":"Intertidal sand body migration along a megatidal coast, Kachemak Bay, Alaska","docAbstract":"<div class=\" metis-abstract\"><div class=\"article-section__content en main\"><p><span class=\"paraNumber\">[1]<span>&nbsp;</span></span>Using a digital video-based Argus Beach Monitoring System (ABMS) on the north shore of Kachemak Bay in south central Alaska, we document the timing and magnitude of alongshore migration of intertidal sand bed forms over a cobble substrate during a 22-month observation period. Two separate sediment packages (sand bodies) of 1–2 m amplitude and ∼200 m wavelength, consisting of well-sorted sand, were observed to travel along shore at annually averaged rates of 278 m/yr (0.76 m/d) and 250 m/yr (0.68 m/d), respectively. Strong seasonality in migration rates was shown by the contrast of rapid winter and slow summer transport. Though set in a megatidal environment, data indicate that sand body migration is driven by eastward propagating wind waves as opposed to net westward directed tidal currents. Greatest weekly averaged rates of movement, exceeding 6 m/d, coincided with wave heights exceeding 2 m suggesting a correlation of wave height and sand body migration. Because Kachemak Bay is partially enclosed, waves responsible for sediment entrainment and transport are locally generated by winds that blow across lower Cook Inlet from the southwest, the direction of greatest fetch. Our estimates of sand body migration translate to a littoral transport rate between 4,400–6,300 m<sup>3</sup>/yr. Assuming an enclosed littoral cell, minimal riverine sediment contributions, and a sea cliff sedimentary fraction of 0.05, we estimate long-term local sea cliff retreat rates of 9–14 cm/yr. Applying a numerical model of wave energy dissipation to the temporally variable beach morphology suggests that sand bodies are responsible for enhancing wave energy dissipation by ∼13% offering protection from sea cliff retreat.</p></div></div>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006JF000487","issn":"01480227","usgsCitation":"Adams, P., Ruggiero, P., Schoch, G., and Gelfenbaum, G., 2007, Intertidal sand body migration along a megatidal coast, Kachemak Bay, Alaska: Journal of Geophysical Research F: Earth Surface, v. 112, no. 2, 19 p., https://doi.org/10.1029/2006JF000487.","productDescription":"19 p.","costCenters":[],"links":[{"id":477151,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006jf000487","text":"Publisher Index Page"},{"id":240534,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Kachemak Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -152.2563599974111,\n              59.992038494693674\n            ],\n            [\n              -152.2563599974111,\n              59.23101933680425\n            ],\n            [\n              -150.67500723123885,\n              59.23101933680425\n            ],\n            [\n              -150.67500723123885,\n              59.992038494693674\n            ],\n            [\n              -152.2563599974111,\n              59.992038494693674\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"112","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-04-19","publicationStatus":"PW","scienceBaseUri":"505a3db4e4b0c8380cd63788","contributors":{"authors":[{"text":"Adams, P.N.","contributorId":32721,"corporation":false,"usgs":true,"family":"Adams","given":"P.N.","email":"","affiliations":[],"preferred":false,"id":425484,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ruggiero, P.","contributorId":25995,"corporation":false,"usgs":true,"family":"Ruggiero","given":"P.","affiliations":[],"preferred":false,"id":425483,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schoch, G.C.","contributorId":101879,"corporation":false,"usgs":true,"family":"Schoch","given":"G.C.","email":"","affiliations":[],"preferred":false,"id":425486,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gelfenbaum, G.","contributorId":72429,"corporation":false,"usgs":true,"family":"Gelfenbaum","given":"G.","email":"","affiliations":[],"preferred":false,"id":425485,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030061,"text":"70030061 - 2007 - A multiple-approach radiometric age estimate for the Rotoiti and Earthquake Flat eruptions, New Zealand, with implications for the MIS 4/3 boundary","interactions":[],"lastModifiedDate":"2023-08-02T11:10:15.786658","indexId":"70030061","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3219,"text":"Quaternary Science Reviews","active":true,"publicationSubtype":{"id":10}},"title":"A multiple-approach radiometric age estimate for the Rotoiti and Earthquake Flat eruptions, New Zealand, with implications for the MIS 4/3 boundary","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-serif\"><div id=\"aep-abstract-id12\" class=\"abstract author\"><div id=\"aep-abstract-sec-id13\"><p>Pyroclastic fall deposits of the paired Rotoiti and Earthquake Flat eruptions from the Taupo Volcanic Zone (New Zealand) combine to form a widespread isochronous horizon over much of northern New Zealand and the southwest Pacific. This horizon is important for correlating climatic and environmental changes during the Last Glacial period, but has been the subject of numerous disparate age estimates between 35.1±2.8 and 71±6&nbsp;ka (all errors are 1&nbsp;s.d.), obtained by a variety of techniques. A potassium–argon (K–Ar) age of 64±4&nbsp;ka was previously determined on bracketing lavas at Mayor Island volcano, offshore from the Taupo Volcanic Zone. We present a new, more-precise<span>&nbsp;</span><sup>40</sup>Ar/<sup>39</sup>Ar age determination on a lava flow on Mayor Island, that shortly post-dates the Rotoiti/Earthquake Flat fall deposits, of 58.5±1.1&nbsp;ka. This value, coupled with existing ages from underlying lavas, yield a new estimate for the age of the combined eruptions of 61.0±1.4&nbsp;ka, which is consistent with U–Th disequilibrium model-age data for zircons from the Rotoiti deposits. Direct<span>&nbsp;</span><sup>40</sup>Ar/<sup>39</sup>Ar age determinations of plagioclase and biotite from the Rotoiti and Earthquake Flat eruption products yield variable values between 49.6±2.8 and 125.3±10.0&nbsp;ka, with the scatter attributed to low radiogenic Ar yields, and/or alteration, and/or inheritance of xenocrystic material with inherited Ar. Rotoiti/Earthquake Flat fall deposits occur in New Zealand in association with palynological indicators of mild climate, attributed to Marine Isotope Stage (MIS) 3 and thus used to suggest an age that is post-59&nbsp;ka. The natures of the criteria used to define the MIS 4/3 boundary in the Northern and Southern hemispheres, however, imply that the new 61&nbsp;ka age for the Rotoiti/Earthquake Flat eruption deposits will provide the inverse, namely, a more accurate isochronous marker for correlating diverse changes across the MIS 4/3 boundary in the southwest Pacific.</p></div></div></div>","language":"English","publisher":"Elseiver","doi":"10.1016/j.quascirev.2007.04.017","issn":"02773791","usgsCitation":"Wilson, C.J., Rhoades, D., Lanphere, M.A., Calvert, A., Houghton, B.F., Weaver, S., and Cole, J.W., 2007, A multiple-approach radiometric age estimate for the Rotoiti and Earthquake Flat eruptions, New Zealand, with implications for the MIS 4/3 boundary: Quaternary Science Reviews, v. 26, no. 13-14, p. 1861-1870, https://doi.org/10.1016/j.quascirev.2007.04.017.","productDescription":"10 p.","startPage":"1861","endPage":"1870","numberOfPages":"10","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":240659,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"New Zealand","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"MultiPolygon\",\"coordinates\":[[[[173.02037,-40.91905],[173.24723,-41.332],[173.95841,-40.9267],[174.24759,-41.34916],[174.24852,-41.77001],[173.87645,-42.23318],[173.22274,-42.97004],[172.71125,-43.37229],[173.08011,-43.85334],[172.30858,-43.86569],[171.45293,-44.24252],[171.18514,-44.8971],[170.6167,-45.90893],[169.83142,-46.35577],[169.33233,-46.64124],[168.41135,-46.61994],[167.76374,-46.2902],[166.67689,-46.21992],[166.50914,-45.8527],[167.04642,-45.11094],[168.30376,-44.12397],[168.94941,-43.93582],[169.66781,-43.55533],[170.52492,-43.03169],[171.12509,-42.51275],[171.56971,-41.76742],[171.94871,-41.51442],[172.09723,-40.9561],[172.79858,-40.49396],[173.02037,-40.91905]]],[[[174.61201,-36.1564],[175.33662,-37.2091],[175.3576,-36.52619],[175.80889,-36.79894],[175.95849,-37.55538],[176.7632,-37.88125],[177.43881,-37.96125],[178.01035,-37.57982],[178.51709,-37.69537],[178.27473,-38.58281],[177.97046,-39.16634],[177.20699,-39.14578],[176.93998,-39.44974],[177.03295,-39.87994],[176.88582,-40.06598],[176.50802,-40.60481],[176.01244,-41.28962],[175.23957,-41.68831],[175.0679,-41.42589],[174.65097,-41.28182],[175.22763,-40.45924],[174.90016,-39.90893],[173.82405,-39.50885],[173.85226,-39.1466],[174.5748,-38.79768],[174.74347,-38.02781],[174.69702,-37.38113],[174.29203,-36.71109],[174.319,-36.53482],[173.841,-36.12198],[173.05417,-35.23713],[172.63601,-34.52911],[173.00704,-34.45066],[173.5513,-35.00618],[174.32939,-35.2655],[174.61201,-36.1564]]]]},\"properties\":{\"name\":\"New Zealand\"}}]}","volume":"26","issue":"13-14","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e48ee4b0c8380cd4670b","contributors":{"authors":[{"text":"Wilson, C. J. N.","contributorId":22096,"corporation":false,"usgs":true,"family":"Wilson","given":"C.","email":"","middleInitial":"J. N.","affiliations":[],"preferred":false,"id":425556,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rhoades, D.A.","contributorId":45121,"corporation":false,"usgs":true,"family":"Rhoades","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":425559,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lanphere, M. A.","contributorId":35298,"corporation":false,"usgs":true,"family":"Lanphere","given":"M.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":425557,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Calvert, A.T.","contributorId":49969,"corporation":false,"usgs":true,"family":"Calvert","given":"A.T.","email":"","affiliations":[],"preferred":false,"id":425560,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Houghton, Bruce F. 0000-0002-7532-9770","orcid":"https://orcid.org/0000-0002-7532-9770","contributorId":140077,"corporation":false,"usgs":false,"family":"Houghton","given":"Bruce","email":"","middleInitial":"F.","affiliations":[{"id":13351,"text":"University of Hawaii Cooperative Studies Unit","active":true,"usgs":false},{"id":6977,"text":"University of Hawai`i at Hilo","active":true,"usgs":false}],"preferred":false,"id":425558,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Weaver, S.D.","contributorId":20914,"corporation":false,"usgs":true,"family":"Weaver","given":"S.D.","email":"","affiliations":[],"preferred":false,"id":425555,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Cole, J. W.","contributorId":81315,"corporation":false,"usgs":true,"family":"Cole","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":425561,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70030068,"text":"70030068 - 2007 - Proximate composition, energetic value, and relative abundance of prey fish from the inshore eastern Bering Sea: Implications for piscivorous predators","interactions":[],"lastModifiedDate":"2018-08-19T20:08:52","indexId":"70030068","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3093,"text":"Polar Biology","active":true,"publicationSubtype":{"id":10}},"title":"Proximate composition, energetic value, and relative abundance of prey fish from the inshore eastern Bering Sea: Implications for piscivorous predators","docAbstract":"<p><span>Changing ocean conditions and subsequent shifts in forage fish communities have been linked to numerical declines of some piscivorous marine birds and mammals in the North Pacific. However, limited information about fish communities is available for some regions, including nearshore waters of the eastern Bering Sea, where many piscivores reside. We determined proximate composition and energetic value of a suite of potential forage fish collected from an estuary on the Yukon-Kuskokwim Delta, Alaska, during 2002 and 2003. Across species, energy density ranged from 14.5 to 20.7&nbsp;kJ&nbsp;g</span><span>&minus;1&nbsp;</span><span>dry mass and varied primarily as a function of lipid content. Total energy content was strongly influenced by body length and we provide species-specific predictive models of total energy based on this relationship; some models may be improved further by incorporating year and date effects. Based on observed energetic differences, we conclude that variation in fish size, quantity, and species composition of the prey community could have important consequences for piscivorous predators.</span></p>","language":"English","publisher":"Springer","doi":"10.1007/s00300-006-0227-1","issn":"07224060","usgsCitation":"Ball, J., Esler, D., and Schmutz, J.A., 2007, Proximate composition, energetic value, and relative abundance of prey fish from the inshore eastern Bering Sea: Implications for piscivorous predators: Polar Biology, v. 30, no. 6, p. 699-708, https://doi.org/10.1007/s00300-006-0227-1.","productDescription":"10 p.","startPage":"699","endPage":"708","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":240224,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212699,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00300-006-0227-1"}],"volume":"30","issue":"6","noUsgsAuthors":false,"publicationDate":"2006-11-08","publicationStatus":"PW","scienceBaseUri":"505a8fbae4b0c8380cd7f912","contributors":{"authors":[{"text":"Ball, J.R.","contributorId":76136,"corporation":false,"usgs":true,"family":"Ball","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":425583,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Esler, Daniel 0000-0001-5501-4555 desler@usgs.gov","orcid":"https://orcid.org/0000-0001-5501-4555","contributorId":5465,"corporation":false,"usgs":true,"family":"Esler","given":"Daniel","email":"desler@usgs.gov","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":12437,"text":"Simon Fraser University, Centre for Wildlife Ecology","active":true,"usgs":false}],"preferred":true,"id":425581,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schmutz, Joel A. 0000-0002-6516-0836 jschmutz@usgs.gov","orcid":"https://orcid.org/0000-0002-6516-0836","contributorId":1805,"corporation":false,"usgs":true,"family":"Schmutz","given":"Joel","email":"jschmutz@usgs.gov","middleInitial":"A.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":425582,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029920,"text":"70029920 - 2007 - Modeling of gas generation from the Barnett Shale, Fort Worth Basin, Texas","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029920","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":701,"text":"American Association of Petroleum Geologists Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Modeling of gas generation from the Barnett Shale, Fort Worth Basin, Texas","docAbstract":"The generative gas potential of the Mississippian Barnett Shale in the Fort Worth Basin, Texas, was quantitatively evaluated by sealed gold-tube pyrolysis. Kinetic parameters for gas generation and vitrinite reflectance (Ro) changes were calculated from pyrolysis data and the results used to estimate the amount of gas generated from the Barnett Shale at geologic heating rates. Using derived kinetics for Ro evolution and gas generation, quantities of hydrocarbon gas generated at Ro ??? 1.1% are about 230 L/t (7.4 scf/t) and increase to more that 5800 L/t (186 scf/t) at Ro ??? 2.0% for a sample with an initial total organic carbon content of 5.5% and Ro = 0.44%. The volume of shale gas generated will depend on the organic richness, thickness, and thermal maturity of the shale and also the amount of petroleum that is retained in the shale during migration. Gas that is reservoired in shales appears to be generated from the cracking of kerogen and petroleum that is retained in shales, and that cracking of the retained petroleum starts by Ro ??? 1.1%. This result suggests that the cracking of petroleum retained in source rocks occurs at rates that are faster than what is predicted for conventional siliciclastic and carbonate reservoirs, and that contact of retained petroleum with kerogen and shale mineralogy may be a critical factor in shale-gas generation. Shale-gas systems, together with overburden, can be considered complete petroleum systems, although the processes of petroleum migration, accumulation, and trap formation are different from what is defined for conventional petroleum systems. Copyright ?? 2007. The American Association of Petroleum Geologists. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Association of Petroleum Geologists Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1306/12060606063","issn":"01491423","usgsCitation":"Hill, R., Zhang, E., Katz, B., and Tang, Y., 2007, Modeling of gas generation from the Barnett Shale, Fort Worth Basin, Texas: American Association of Petroleum Geologists Bulletin, v. 91, no. 4, p. 501-521, https://doi.org/10.1306/12060606063.","startPage":"501","endPage":"521","numberOfPages":"21","costCenters":[],"links":[{"id":212981,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1306/12060606063"},{"id":240557,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5c13e4b0c8380cd6f9f5","contributors":{"authors":[{"text":"Hill, R.J.","contributorId":92850,"corporation":false,"usgs":true,"family":"Hill","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":424911,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Zhang, E.","contributorId":26144,"corporation":false,"usgs":true,"family":"Zhang","given":"E.","email":"","affiliations":[],"preferred":false,"id":424909,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Katz, B.J.","contributorId":27265,"corporation":false,"usgs":true,"family":"Katz","given":"B.J.","email":"","affiliations":[],"preferred":false,"id":424910,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Tang, Y.","contributorId":104199,"corporation":false,"usgs":true,"family":"Tang","given":"Y.","affiliations":[],"preferred":false,"id":424912,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029916,"text":"70029916 - 2007 - The Northern end of the Dead Sea Basin: Geometry from reflection seismic evidence","interactions":[],"lastModifiedDate":"2017-11-18T10:02:07","indexId":"70029916","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3525,"text":"Tectonophysics","active":true,"publicationSubtype":{"id":10}},"title":"The Northern end of the Dead Sea Basin: Geometry from reflection seismic evidence","docAbstract":"Recently released reflection seismic lines from the Eastern side of the Jordan River north of the Dead Sea were interpreted by using borehole data and incorporated with the previously published seismic lines of the eastern side of the Jordan River. For the first time, the lines from the eastern side of the Jordan River were combined with the published reflection seismic lines from the western side of the Jordan River. In the complete cross sections, the inner deep basin is strongly asymmetric toward the Jericho Fault supporting the interpretation of this segment of the fault as the long-lived and presently active part of the Dead Sea Transform. There is no indication for a shift of the depocenter toward a hypothetical eastern major fault with time, as recently suggested. Rather, the north-eastern margin of the deep basin takes the form of a large flexure, modestly faulted. In the N-S-section along its depocenter, the floor of the basin at its northern end appears to deepen continuously by roughly 0.5??km over 10??km distance, without evidence of a transverse fault. The asymmetric and gently-dipping shape of the basin can be explained by models in which the basin is located outside the area of overlap between en-echelon strike-slip faults. ?? 2007 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Tectonophysics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.tecto.2007.02.007","issn":"00401951","usgsCitation":"Al-Zoubi, A., Heinrichs, T., Qabbani, I., and ten Brink, U., 2007, The Northern end of the Dead Sea Basin: Geometry from reflection seismic evidence: Tectonophysics, v. 434, no. 1-4, p. 55-69, https://doi.org/10.1016/j.tecto.2007.02.007.","productDescription":"15 p.","startPage":"55","endPage":"69","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":240493,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Israel, Jordan, Palestine","otherGeospatial":"Dead Sea","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              35.321044921875,\n              31.344254455668054\n            ],\n            [\n              35.68359375,\n              31.344254455668054\n            ],\n            [\n              35.68359375,\n              31.83089906339438\n            ],\n            [\n              35.321044921875,\n              31.83089906339438\n            ],\n            [\n              35.321044921875,\n              31.344254455668054\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"434","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba85ee4b08c986b321ba1","contributors":{"authors":[{"text":"Al-Zoubi, A. S.","contributorId":94454,"corporation":false,"usgs":true,"family":"Al-Zoubi","given":"A. S.","affiliations":[],"preferred":false,"id":424892,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Heinrichs, T.","contributorId":24999,"corporation":false,"usgs":true,"family":"Heinrichs","given":"T.","email":"","affiliations":[],"preferred":false,"id":424889,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Qabbani, I.","contributorId":85388,"corporation":false,"usgs":true,"family":"Qabbani","given":"I.","email":"","affiliations":[],"preferred":false,"id":424891,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"ten Brink, Uri S. 0000-0001-6858-3001 utenbrink@usgs.gov","orcid":"https://orcid.org/0000-0001-6858-3001","contributorId":127560,"corporation":false,"usgs":true,"family":"ten Brink","given":"Uri S.","email":"utenbrink@usgs.gov","affiliations":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true},{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":424890,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029914,"text":"70029914 - 2007 - Predicting the potential distribution of invasive exotic species using GIS and information-theoretic approaches: A case of ragweed (Ambrosia artemisiifolia L.) distribution in China","interactions":[],"lastModifiedDate":"2017-04-14T13:21:52","indexId":"70029914","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1235,"text":"Chinese Science Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Predicting the potential distribution of invasive exotic species using GIS and information-theoretic approaches: A case of ragweed (Ambrosia artemisiifolia L.) distribution in China","docAbstract":"Invasive exotic species pose a growing threat to the economy, public health, and ecological integrity of nations worldwide. Explaining and predicting the spatial distribution of invasive exotic species is of great importance to prevention and early warning efforts. We are investigating the potential distribution of invasive exotic species, the environmental factors that influence these distributions, and the ability to predict them using statistical and information-theoretic approaches. For some species, detailed presence/absence occurrence data are available, allowing the use of a variety of standard statistical techniques. However, for most species, absence data are not available. Presented with the challenge of developing a model based on presence-only information, we developed an improved logistic regression approach using Information Theory and Frequency Statistics to produce a relative suitability map. This paper generated a variety of distributions of ragweed (Ambrosia artemisiifolia L.) from logistic regression models applied to herbarium specimen location data and a suite of GIS layers including climatic, topographic, and land cover information. Our logistic regression model was based on Akaike's Information Criterion (AIC) from a suite of ecologically reasonable predictor variables. Based on the results we provided a new Frequency Statistical method to compartmentalize habitat-suitability in the native range. Finally, we used the model and the compartmentalized criterion developed in native ranges to \"project\" a potential distribution onto the exotic ranges to build habitat-suitability maps. ?? Science in China Press 2007.","language":"English","publisher":"Springer","doi":"10.1007/s11434-007-0192-2","issn":"10016538","usgsCitation":"Hao, C., LiJun, C., and Albright, T.P., 2007, Predicting the potential distribution of invasive exotic species using GIS and information-theoretic approaches: A case of ragweed (Ambrosia artemisiifolia L.) distribution in China: Chinese Science Bulletin, v. 52, no. 9, p. 1223-1230, https://doi.org/10.1007/s11434-007-0192-2.","productDescription":"8 p.","startPage":"1223","endPage":"1230","numberOfPages":"8","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":240459,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212894,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11434-007-0192-2"}],"volume":"52","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a81d4e4b0c8380cd7b769","contributors":{"authors":[{"text":"Hao, Chen","contributorId":89306,"corporation":false,"usgs":true,"family":"Hao","given":"Chen","email":"","affiliations":[],"preferred":false,"id":424880,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"LiJun, Chen","contributorId":95241,"corporation":false,"usgs":true,"family":"LiJun","given":"Chen","email":"","affiliations":[],"preferred":false,"id":424881,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Albright, Thomas P.","contributorId":78114,"corporation":false,"usgs":true,"family":"Albright","given":"Thomas","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":424879,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029913,"text":"70029913 - 2007 - Automated classifications of topography from DEMs by an unsupervised nested-means algorithm and a three-part geometric signature","interactions":[],"lastModifiedDate":"2023-08-25T11:46:22.779709","indexId":"70029913","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1801,"text":"Geomorphology","active":true,"publicationSubtype":{"id":10}},"title":"Automated classifications of topography from DEMs by an unsupervised nested-means algorithm and a three-part geometric signature","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-gulliver text-s\"><div id=\"aep-abstract-id20\" class=\"abstract author\"><div id=\"aep-abstract-sec-id21\"><p>An iterative procedure that implements the classification of continuous topography as a problem in digital image-processing automatically divides an area into categories of surface form; three taxonomic criteria–slope gradient, local convexity, and surface texture–are calculated from a square-grid digital elevation model (DEM). The sequence of programmed operations combines twofold-partitioned maps of the three variables converted to greyscale images, using the mean of each variable as the dividing threshold. To subdivide increasingly subtle topography, grid cells sloping at less than mean gradient of the input DEM are classified by designating mean values of successively lower-sloping subsets of the study area (nested means) as taxonomic thresholds, thereby increasing the number of output categories from the minimum 8 to 12 or 16. Program output is exemplified by 16 topographic types for the world at 1-km spatial resolution (SRTM30 data), the Japanese Islands at 270&nbsp;m, and part of Hokkaido at 55&nbsp;m. Because the procedure is unsupervised and reflects frequency distributions of the input variables rather than pre-set criteria, the resulting classes are undefined and must be calibrated empirically by subsequent analysis. Maps of the example classifications reflect physiographic regions, geological structure, and landform as well as slope materials and processes; fine-textured terrain categories tend to correlate with erosional topography or older surfaces, coarse-textured classes with areas of little dissection. In Japan the resulting classes approximate landform types mapped from airphoto analysis, while in the Americas they create map patterns resembling Hammond's terrain types or surface-form classes; SRTM30 output for the United States compares favorably with Fenneman's physical divisions. Experiments are suggested for further developing the method; the Arc/Info AML and the map of terrain classes for the world are available as online downloads.</p></div></div></div>","language":"English","publisher":"Elsevier","doi":"10.1016/j.geomorph.2006.09.012","issn":"0169555X","usgsCitation":"Iwahashi, J., and Pike, R., 2007, Automated classifications of topography from DEMs by an unsupervised nested-means algorithm and a three-part geometric signature: Geomorphology, v. 86, no. 3-4, p. 409-440, https://doi.org/10.1016/j.geomorph.2006.09.012.","productDescription":"32 p.","startPage":"409","endPage":"440","numberOfPages":"32","costCenters":[],"links":[{"id":240458,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"86","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059eef2e4b0c8380cd4a062","contributors":{"authors":[{"text":"Iwahashi, J.","contributorId":85778,"corporation":false,"usgs":true,"family":"Iwahashi","given":"J.","email":"","affiliations":[],"preferred":false,"id":424878,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pike, R.J.","contributorId":72814,"corporation":false,"usgs":true,"family":"Pike","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":424877,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029910,"text":"70029910 - 2007 - Regression models for estimating coseismic landslide displacement","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029910","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1517,"text":"Engineering Geology","active":true,"publicationSubtype":{"id":10}},"title":"Regression models for estimating coseismic landslide displacement","docAbstract":"Newmark's sliding-block model is widely used to estimate coseismic slope performance. Early efforts to develop simple regression models to estimate Newmark displacement were based on analysis of the small number of strong-motion records then available. The current availability of a much larger set of strong-motion records dictates that these regression equations be updated. Regression equations were generated using data derived from a collection of 2270 strong-motion records from 30 worldwide earthquakes. The regression equations predict Newmark displacement in terms of (1) critical acceleration ratio, (2) critical acceleration ratio and earthquake magnitude, (3) Arias intensity and critical acceleration, and (4) Arias intensity and critical acceleration ratio. These equations are well constrained and fit the data well (71% < R2 < 88%), but they have standard deviations of about 0.5 log units, such that the range defined by the mean ?? one standard deviation spans about an order of magnitude. These regression models, therefore, are not recommended for use in site-specific design, but rather for regional-scale seismic landslide hazard mapping or for rapid preliminary screening of sites. ?? 2007 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Engineering Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.enggeo.2007.01.013","issn":"00137952","usgsCitation":"Jibson, R., 2007, Regression models for estimating coseismic landslide displacement: Engineering Geology, v. 91, no. 2-4, p. 209-218, https://doi.org/10.1016/j.enggeo.2007.01.013.","startPage":"209","endPage":"218","numberOfPages":"10","costCenters":[],"links":[{"id":212840,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.enggeo.2007.01.013"},{"id":240392,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"2-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"50e4a5cee4b0e8fec6cdc006","contributors":{"authors":[{"text":"Jibson, R.W.","contributorId":8467,"corporation":false,"usgs":true,"family":"Jibson","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":424866,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70029906,"text":"70029906 - 2007 - Relative influence of streamflows in assessing temporal variability in stream habitat","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029906","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"Relative influence of streamflows in assessing temporal variability in stream habitat","docAbstract":"The effects of streamflows on temporal variation in stream habitat were analyzed from the data collected 6-11 years apart at 38 sites across the United States. Multiple linear regression was used to assess the variation in habitat caused by streamflow at the time of sampling and high flows between sampling. In addition to flow variables, the model also contained geomorphic and land use factors. The regression model was statistically significant (p < 0.05; R 2 = 0.31-0.46) for 5 of 14 habitat variables: mean wetted stream depth, mean bankfull depth, mean wetted stream width, coefficient of variation of wetted stream width, and the percent frequency of bank erosion. High flows between samples accounted for about 16% of the total variation in the frequency of bank erosion. Streamflow at the time of sampling was the main source of variation in mean stream depth and contributed to the variation in mean stream width and the frequency of bank erosion. Urban land use (population change) accounted for over 20% of the total variation in mean bankfull depth, 15% of the total variation in the coefficient of variation of stream width, and about 10% of the variation in mean stream width. ?? 2007 American Water Resources Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of the American Water Resources Association","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1752-1688.2007.00051.x","issn":"1093474X","usgsCitation":"Goldstein, R.M., Meador, M.R., and Ruhl, K., 2007, Relative influence of streamflows in assessing temporal variability in stream habitat: Journal of the American Water Resources Association, v. 43, no. 3, p. 642-650, https://doi.org/10.1111/j.1752-1688.2007.00051.x.","startPage":"642","endPage":"650","numberOfPages":"9","costCenters":[],"links":[{"id":240354,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212810,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1752-1688.2007.00051.x"}],"volume":"43","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-05-07","publicationStatus":"PW","scienceBaseUri":"505aa68ce4b0c8380cd84ef6","contributors":{"authors":[{"text":"Goldstein, R. M.","contributorId":98305,"corporation":false,"usgs":true,"family":"Goldstein","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":424849,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Meador, M. R.","contributorId":74400,"corporation":false,"usgs":true,"family":"Meador","given":"M.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":424847,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ruhl, K.E.","contributorId":92869,"corporation":false,"usgs":true,"family":"Ruhl","given":"K.E.","email":"","affiliations":[],"preferred":false,"id":424848,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029904,"text":"70029904 - 2007 - Assessment of exploration bias in data-driven predictive models and the estimation of undiscovered resources","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029904","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2832,"text":"Natural Resources Research","onlineIssn":"1573-8981","printIssn":"1520-7439","active":true,"publicationSubtype":{"id":10}},"title":"Assessment of exploration bias in data-driven predictive models and the estimation of undiscovered resources","docAbstract":"The spatial distribution of discovered resources may not fully mimic the distribution of all such resources, discovered and undiscovered, because the process of discovery is biased by accessibility factors (e.g., outcrops, roads, and lakes) and by exploration criteria. In data-driven predictive models, the use of training sites (resource occurrences) biased by exploration criteria and accessibility does not necessarily translate to a biased predictive map. However, problems occur when evidence layers correlate with these same exploration factors. These biases then can produce a data-driven model that predicts known occurrences well, but poorly predicts undiscovered resources. Statistical assessment of correlation between evidence layers and map-based exploration factors is difficult because it is difficult to quantify the \"degree of exploration.\" However, if such a degree-of-exploration map can be produced, the benefits can be enormous. Not only does it become possible to assess this correlation, but it becomes possible to predict undiscovered, instead of discovered, resources. Using geothermal systems in Nevada, USA, as an example, a degree-of-exploration model is created, which then is resolved into purely explored and unexplored equivalents, each occurring within coextensive study areas. A weights-of-evidence (WofE) model is built first without regard to the degree of exploration, and then a revised WofE model is calculated for the \"explored fraction\" only. Differences in the weights between the two models provide a correlation measure between the evidence and the degree of exploration. The data used to build the geothermal evidence layers are perceived to be independent of degree of exploration. Nevertheless, the evidence layers correlate with exploration because exploration has preferred the same favorable areas identified by the evidence patterns. In this circumstance, however, the weights for the \"explored\" WofE model minimize this bias. Using these revised weights, posterior probability is extrapolated into unexplored areas to estimate undiscovered deposits. ?? International Association for Mathematical Geology 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Natural Resources Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11053-007-9037-6","issn":"15207439","usgsCitation":"Coolbaugh, M., Raines, G.L., and Zehner, R.E., 2007, Assessment of exploration bias in data-driven predictive models and the estimation of undiscovered resources: Natural Resources Research, v. 16, no. 2, p. 199-207, https://doi.org/10.1007/s11053-007-9037-6.","startPage":"199","endPage":"207","numberOfPages":"9","costCenters":[],"links":[{"id":212780,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11053-007-9037-6"},{"id":240318,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-05-16","publicationStatus":"PW","scienceBaseUri":"5059ee2ee4b0c8380cd49beb","contributors":{"authors":[{"text":"Coolbaugh, M.F.","contributorId":55034,"corporation":false,"usgs":true,"family":"Coolbaugh","given":"M.F.","affiliations":[],"preferred":false,"id":424841,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Raines, G. L.","contributorId":90720,"corporation":false,"usgs":true,"family":"Raines","given":"G.","middleInitial":"L.","affiliations":[],"preferred":false,"id":424843,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zehner, R. E.","contributorId":67933,"corporation":false,"usgs":true,"family":"Zehner","given":"R.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":424842,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029899,"text":"70029899 - 2007 - A post-Calumet shoreline along southern Lake Michigan","interactions":[],"lastModifiedDate":"2012-03-12T17:21:09","indexId":"70029899","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2411,"text":"Journal of Paleolimnology","active":true,"publicationSubtype":{"id":10}},"title":"A post-Calumet shoreline along southern Lake Michigan","docAbstract":"The southern shore of Lake Michigan is the type area for many of ancestral Lake Michigan's late Pleistocene lake phases, but coastal deposits and features of the Algonquin phase of northern Lake Michigan, Lake Huron, and Lake Superior are not recognized in the area. Isostatic rebound models suggest that Algonquin phase deposits should be 100 m or more below modern lake level. A relict shoreline, however, exists along the lakeward margin of the Calumet Beach that was erosional west of Deep River and depositional east of the river. For this post-Calumet shoreline, the elevation of basal foreshore deposits east of Deep River and the base of the scarp west of Deep River indicate a slightly westward dipping water plane that is centered at ???184 m above mean sea level. Basal foreshore elevations also indicate that lake level fell ???2 m during the development of the shoreline. The pooled mean of radiocarbon dates from the surface of the peat below post-Calumet shoreline foreshore deposits indicate that the lake transgressed over the peat at 10,560 ?? 70 years B.P. Pollen assemblages from the peat are consistent with this age. The elevation and age of the post-Calumet shoreline are similar to the Main Algonquin phase of Lake Huron. Recent isostatic rebound models do not adequately address a high-elevation Algonquin-age shoreline along the southern shore of Lake Michigan, but the Goldthwait (1908) hinge-line model does. ?? 2006 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Paleolimnology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10933-006-9046-1","issn":"09212728","usgsCitation":"Capps, D., Thompson, T., and Booth, R., 2007, A post-Calumet shoreline along southern Lake Michigan: Journal of Paleolimnology, v. 37, no. 3, p. 395-409, https://doi.org/10.1007/s10933-006-9046-1.","startPage":"395","endPage":"409","numberOfPages":"15","costCenters":[],"links":[{"id":212720,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10933-006-9046-1"},{"id":240248,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"37","issue":"3","noUsgsAuthors":false,"publicationDate":"2006-12-13","publicationStatus":"PW","scienceBaseUri":"5059e4e5e4b0c8380cd469e0","contributors":{"authors":[{"text":"Capps, D.K.","contributorId":62833,"corporation":false,"usgs":true,"family":"Capps","given":"D.K.","email":"","affiliations":[],"preferred":false,"id":424821,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thompson, T.A.","contributorId":73226,"corporation":false,"usgs":true,"family":"Thompson","given":"T.A.","email":"","affiliations":[],"preferred":false,"id":424822,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Booth, R.K.","contributorId":47122,"corporation":false,"usgs":true,"family":"Booth","given":"R.K.","email":"","affiliations":[],"preferred":false,"id":424820,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029898,"text":"70029898 - 2007 - Global warming and climate forcing by recent albedo changes on Mars","interactions":[],"lastModifiedDate":"2012-03-12T17:21:09","indexId":"70029898","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2840,"text":"Nature","active":true,"publicationSubtype":{"id":10}},"title":"Global warming and climate forcing by recent albedo changes on Mars","docAbstract":"For hundreds of years, scientists have tracked the changing appearance of Mars, first by hand drawings and later by photographs. Because of this historical record, many classical albedo patterns have long been known to shift in appearance over time. Decadal variations of the martian surface albedo are generally attributed to removal and deposition of small amounts of relatively bright dust on the surface. Large swaths of the surface (up to 56 million km2) have been observed to darken or brighten by 10 per cent or more. It is unknown, however, how these albedo changes affect wind circulation, dust transport and the feedback between these processes and the martian climate. Here we present predictions from a Mars general circulation model, indicating that the observed interannual albedo alterations strongly influence the martian environment. Results indicate enhanced wind stress in recently darkened areas and decreased wind stress in brightened areas, producing a positive feedback system in which the albedo changes strengthen the winds that generate the changes. The simulations also predict a net annual global warming of surface air temperatures by ???0.65 K, enhancing dust lifting by increasing the likelihood of dust devil generation. The increase in global dust lifting by both wind stress and dust devils may affect the mechanisms that trigger large dust storm initiation, a poorly understood phenomenon, unique to Mars. In addition, predicted increases in summertime air temperatures at high southern latitudes would contribute to the rapid and steady scarp retreat that has been observed in the south polar residual ice for the past four Mars years. Our results suggest that documented albedo changes affect recent climate change and large-scale weather patterns on Mars, and thus albedo variations are a necessary component of future atmospheric and climate studies. ??2007 Nature Publishing Group.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Nature","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1038/nature05718","issn":"00280836","usgsCitation":"Fenton, L., Geissler, P., and Haberle, R., 2007, Global warming and climate forcing by recent albedo changes on Mars: Nature, v. 446, no. 7136, p. 646-649, https://doi.org/10.1038/nature05718.","startPage":"646","endPage":"649","numberOfPages":"4","costCenters":[],"links":[{"id":240213,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212688,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1038/nature05718"}],"volume":"446","issue":"7136","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2964e4b0c8380cd5a8eb","contributors":{"authors":[{"text":"Fenton, L.K.","contributorId":102189,"corporation":false,"usgs":true,"family":"Fenton","given":"L.K.","affiliations":[],"preferred":false,"id":424819,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Geissler, P.E.","contributorId":67636,"corporation":false,"usgs":true,"family":"Geissler","given":"P.E.","email":"","affiliations":[],"preferred":false,"id":424817,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Haberle, R.M.","contributorId":94461,"corporation":false,"usgs":true,"family":"Haberle","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":424818,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029894,"text":"70029894 - 2007 - Deriving a light use efficiency model from eddy covariance flux data for predicting daily gross primary production across biomes","interactions":[],"lastModifiedDate":"2017-04-12T16:04:03","indexId":"70029894","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":681,"text":"Agricultural and Forest Meteorology","active":true,"publicationSubtype":{"id":10}},"title":"Deriving a light use efficiency model from eddy covariance flux data for predicting daily gross primary production across biomes","docAbstract":"<p><span>The quantitative simulation of gross primary production (GPP) at various spatial and temporal scales has been a major challenge in quantifying the global carbon cycle. We developed a light use efficiency (LUE) daily GPP model from eddy covariance (EC) measurements. The model, called EC-LUE, is driven by only four variables: normalized difference vegetation index (NDVI), photosynthetically active radiation (PAR), air temperature, and the Bowen ratio of sensible to latent heat flux (used to calculate moisture stress). The EC-LUE model relies on two assumptions: First, that the fraction of absorbed PAR (fPAR) is a linear function of NDVI; Second, that the realized light use efficiency, calculated from a biome-independent invariant potential LUE, is controlled by air temperature or soil moisture, whichever is most limiting. The EC-LUE model was calibrated and validated using 24,349 daily GPP estimates derived from 28 eddy covariance flux towers from the AmeriFlux and EuroFlux networks, covering a variety of forests, grasslands and savannas. The model explained 85% and 77% of the observed variations of daily GPP for all the calibration and validation sites, respectively. A comparison with GPP calculated from the Moderate Resolution Imaging Spectroradiometer (MODIS) indicated that the EC-LUE model predicted GPP that better matched tower data across these sites. The realized LUE was predominantly controlled by moisture conditions throughout the growing season, and controlled by temperature only at the beginning and end of the growing season. The EC-LUE model is an alternative approach that makes it possible to map daily GPP over large areas because (1) the potential LUE is invariant across various land cover types and (2) all driving forces of the model can be derived from remote sensing data or existing climate observation networks.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.agrformet.2006.12.001","issn":"01681923","usgsCitation":"Yuan, W., Liu, S., Zhou, G., Tieszen, L., Baldocchi, D., Bernhofer, C., Gholz, H., Goldstein, A.H., Goulden, M.L., Hollinger, D., Hu, Y., Law, B.E., Stoy, P., Vesala, T., and Wofsy, S., 2007, Deriving a light use efficiency model from eddy covariance flux data for predicting daily gross primary production across biomes: Agricultural and Forest Meteorology, v. 143, no. 3-4, p. 189-207, https://doi.org/10.1016/j.agrformet.2006.12.001.","productDescription":"19 p.","startPage":"189","endPage":"207","numberOfPages":"19","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":476983,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://escholarship.org/uc/item/0nv498zp","text":"External Repository"},{"id":240683,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213094,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.agrformet.2006.12.001"}],"volume":"143","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fedee4b0c8380cd4ef81","contributors":{"authors":[{"text":"Yuan, W.","contributorId":35955,"corporation":false,"usgs":true,"family":"Yuan","given":"W.","email":"","affiliations":[],"preferred":false,"id":424791,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Liu, S.","contributorId":93170,"corporation":false,"usgs":true,"family":"Liu","given":"S.","affiliations":[],"preferred":false,"id":424798,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhou, G.","contributorId":12604,"corporation":false,"usgs":true,"family":"Zhou","given":"G.","email":"","affiliations":[],"preferred":false,"id":424786,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Tieszen, L.L.","contributorId":24046,"corporation":false,"usgs":true,"family":"Tieszen","given":"L.L.","email":"","affiliations":[],"preferred":false,"id":424789,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Baldocchi, D.","contributorId":40368,"corporation":false,"usgs":true,"family":"Baldocchi","given":"D.","affiliations":[],"preferred":false,"id":424793,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Bernhofer, C.","contributorId":37964,"corporation":false,"usgs":true,"family":"Bernhofer","given":"C.","email":"","affiliations":[],"preferred":false,"id":424792,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Gholz, H.","contributorId":107938,"corporation":false,"usgs":true,"family":"Gholz","given":"H.","email":"","affiliations":[],"preferred":false,"id":424799,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Goldstein, Allen H.","contributorId":7452,"corporation":false,"usgs":true,"family":"Goldstein","given":"Allen","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":424785,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Goulden, M. L.","contributorId":35095,"corporation":false,"usgs":false,"family":"Goulden","given":"M.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":424790,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Hollinger, D.Y.","contributorId":86567,"corporation":false,"usgs":true,"family":"Hollinger","given":"D.Y.","email":"","affiliations":[],"preferred":false,"id":424797,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Hu, Y.","contributorId":68474,"corporation":false,"usgs":true,"family":"Hu","given":"Y.","email":"","affiliations":[],"preferred":false,"id":424796,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Law, B. E.","contributorId":17586,"corporation":false,"usgs":true,"family":"Law","given":"B.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":424787,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Stoy, Paul C.","contributorId":60860,"corporation":false,"usgs":true,"family":"Stoy","given":"Paul C.","affiliations":[],"preferred":false,"id":424795,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Vesala, T.","contributorId":21355,"corporation":false,"usgs":true,"family":"Vesala","given":"T.","affiliations":[],"preferred":false,"id":424788,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Wofsy, S.C.","contributorId":44699,"corporation":false,"usgs":true,"family":"Wofsy","given":"S.C.","email":"","affiliations":[],"preferred":false,"id":424794,"contributorType":{"id":1,"text":"Authors"},"rank":16}]}}
,{"id":70029892,"text":"70029892 - 2007 - Free zinc ion and dissolved orthophosphate effects on phytoplankton from Coeur d'Alene Lake, Idaho","interactions":[],"lastModifiedDate":"2023-08-25T12:07:25.166789","indexId":"70029892","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Free zinc ion and dissolved orthophosphate effects on phytoplankton from Coeur d'Alene Lake, Idaho","docAbstract":"<p>Coeur d'Alene Lake in northern Idaho is fed by two major rivers:  the Coeur d'Alene River from the east and the St. Joe River from the south, with the Spokane River as its outlet to the north. This phosphorus-limited lake has been subjected to decades of mining (primarily for zinc and silver) and other anthropogenic inputs. A 32 full-factorial experimental design was used to examine the interactive effects of free (uncomplexed) zinc ion and dissolved-orthophosphate concentrations on phytoplankton that were isolated from two sites along a longitudinal zinc-concentration gradient in Coeur d'Alene Lake. The two sites displayed different dominant taxa. Chlorella minutissima, a dominant species near the southern St. Joe River inlet, exhibited greater sensitivity to free Zn ions than Asterionella formosa, collected nearer the Coeur d'Alene River mouth with elevated dissolved-zinc concentrations. Empirical phytoplankton-response models were generated to describe phytoplankton growth in response to remediation strategies in the surrounding watershed. If dissolved Zn can be reduced in the water column from &gt;500 nM (i.e., current concentrations near and down stream of the Coeur d'Alene River plume) to &lt;3 nM (i.e., concentrations near the southern St. Joe River inlet) such that the lake is truly phosphorus limited, management of phosphorus inputs by surrounding communities will ultimately determine the limnologic state of the lake.</p>","language":"English","publisher":"American Chemical Society","doi":"10.1021/es062923l","issn":"0013936X","usgsCitation":"Kuwabara, J.S., Topping, B.R., Woods, P.F., and Carter, J.L., 2007, Free zinc ion and dissolved orthophosphate effects on phytoplankton from Coeur d'Alene Lake, Idaho: Environmental Science & Technology, v. 41, no. 8, p. 2811-2817, https://doi.org/10.1021/es062923l.","productDescription":"7 p.","startPage":"2811","endPage":"2817","numberOfPages":"7","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240650,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Idaho","otherGeospatial":"Coeur d'Alene Lake","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -116.81625366210938,\n              47.68018294648414\n            ],\n            [\n              -116.707763671875,\n              47.66538735632654\n            ],\n            [\n              -116.64596557617188,\n              47.635783590864854\n            ],\n            [\n              -116.64321899414062,\n              47.61079236060622\n            ],\n            [\n              -116.7572021484375,\n              47.61264397257417\n            ],\n            [\n   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Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":424758,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Topping, Brent R. 0000-0002-7887-4221 btopping@usgs.gov","orcid":"https://orcid.org/0000-0002-7887-4221","contributorId":1484,"corporation":false,"usgs":true,"family":"Topping","given":"Brent","email":"btopping@usgs.gov","middleInitial":"R.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":424760,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Woods, Paul F.","contributorId":82273,"corporation":false,"usgs":true,"family":"Woods","given":"Paul","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":424759,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Carter, James L. 0000-0002-0104-9776 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,{"id":70029888,"text":"70029888 - 2007 - Forward model nonlinearity versus inverse model nonlinearity","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029888","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Forward model nonlinearity versus inverse model nonlinearity","docAbstract":"The issue of concern is the impact of forward model nonlinearity on the nonlinearity of the inverse model. The question posed is, \"Does increased nonlinearity in the head solution (forward model) always result in increased nonlinearity in the inverse solution (estimation of hydraulic conductivity)?\" It is shown that the two nonlinearities are separate, and it is not universally true that increased forward model nonlinearity increases inverse model nonlinearity. ?? 2007 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2007.00372.x","issn":"0017467X","usgsCitation":"Mehl, S., 2007, Forward model nonlinearity versus inverse model nonlinearity: Ground Water, v. 45, no. 6, p. 791-794, https://doi.org/10.1111/j.1745-6584.2007.00372.x.","startPage":"791","endPage":"794","numberOfPages":"4","costCenters":[],"links":[{"id":212980,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2007.00372.x"},{"id":240555,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a137de4b0c8380cd5468b","contributors":{"authors":[{"text":"Mehl, S.","contributorId":20114,"corporation":false,"usgs":true,"family":"Mehl","given":"S.","affiliations":[],"preferred":false,"id":424742,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70029886,"text":"70029886 - 2007 - The relationship between productivities of salmonids and forest stands in northern California watersheds","interactions":[],"lastModifiedDate":"2013-03-24T15:08:02","indexId":"70029886","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3744,"text":"Western Journal of Applied Forestry","active":true,"publicationSubtype":{"id":10}},"title":"The relationship between productivities of salmonids and forest stands in northern California watersheds","docAbstract":"Productivities of resident salmonids and upland and riporian forests in 22 small watersheds of coastal northern California were estimated and compared to determine whether: 1) upland site productivity predicted riparian site productivity; 2) either upland or riparian site productivity predicted salmonid productivity; and 3) other parameters explained more of the variance in salmonid productivity. Upland and riparian site productivities were estimated using Site Index values for redwood (Sequoia sempervirens) and red alder (Alnus rubra), respectively. Salmonid productivity was indexed by back-calculated length at age 1 of the largest individuals sampled and by total biomass. Upland and riparian site indices were correlated, but neither factor contributed to the best approximating models of salmonid productivity. Total salmonid biomass was best described by a positive relationship with drainage area. Length of dominant fish was best described by a positive relationship with percentage of hardwoods within riparian areas, which may result from nutrient and/or litter subsidies provided by red older. The inability of forest productivity to predict salmon productivity may reflect insufficient variation in independent variables, limitations of the indices, and the operation of other factors affecting salmonid production. The lack of an apparent relationship between upland conifer and salmonid productivity suggests that management of land for timber productivity and component streams for salmonid production in these sites will require separate, albeit integrated, management strategies.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Western Journal of Applied Forestry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"08856095","usgsCitation":"Frazey, S., and Wilzbach, M., 2007, The relationship between productivities of salmonids and forest stands in northern California watersheds: Western Journal of Applied Forestry, v. 22, no. 2, p. 73-80.","startPage":"73","endPage":"80","numberOfPages":"8","costCenters":[],"links":[{"id":240524,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269924,"type":{"id":11,"text":"Document"},"url":"https://www.humboldt.edu/cuca/documents/publications/WJAF07.pdf"}],"volume":"22","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505baf1be4b08c986b324559","contributors":{"authors":[{"text":"Frazey, S.L.","contributorId":93705,"corporation":false,"usgs":true,"family":"Frazey","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":424737,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilzbach, M.A.","contributorId":48505,"corporation":false,"usgs":true,"family":"Wilzbach","given":"M.A.","affiliations":[],"preferred":false,"id":424736,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029878,"text":"70029878 - 2007 - Development and implementation of a Bayesian-based aquifer vulnerability assessment in Florida","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029878","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2832,"text":"Natural Resources Research","onlineIssn":"1573-8981","printIssn":"1520-7439","active":true,"publicationSubtype":{"id":10}},"title":"Development and implementation of a Bayesian-based aquifer vulnerability assessment in Florida","docAbstract":"The Florida Aquifer Vulnerability Assessment (FAVA) was designed to provide a tool for environmental, regulatory, resource management, and planning professionals to facilitate protection of groundwater resources from surface sources of contamination. The FAVA project implements weights-of-evidence (WofE), a data-driven, Bayesian-probabilistic model to generate a series of maps reflecting relative aquifer vulnerability of Florida's principal aquifer systems. The vulnerability assessment process, from project design to map implementation is described herein in reference to the Floridan aquifer system (FAS). The WofE model calculates weighted relationships between hydrogeologic data layers that influence aquifer vulnerability and ambient groundwater parameters in wells that reflect relative degrees of vulnerability. Statewide model input data layers (evidential themes) include soil hydraulic conductivity, density of karst features, thickness of aquifer confinement, and hydraulic head difference between the FAS and the watertable. Wells with median dissolved nitrogen concentrations exceeding statistically established thresholds serve as training points in the WofE model. The resulting vulnerability map (response theme) reflects classified posterior probabilities based on spatial relationships between the evidential themes and training points. The response theme is subjected to extensive sensitivity and validation testing. Among the model validation techniques is calculation of a response theme based on a different water-quality indicator of relative recharge or vulnerability: dissolved oxygen. Successful implementation of the FAVA maps was facilitated by the overall project design, which included a needs assessment and iterative technical advisory committee input and review. Ongoing programs to protect Florida's springsheds have led to development of larger-scale WofE-based vulnerability assessments. Additional applications of the maps include land-use planning amendments and prioritization of land purchases to protect groundwater resources. ?? International Association for Mathematical Geology 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Natural Resources Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11053-007-9038-5","issn":"15207439","usgsCitation":"Arthur, J.D., Wood, H., Baker, A., Cichon, J., and Raines, G.L., 2007, Development and implementation of a Bayesian-based aquifer vulnerability assessment in Florida: Natural Resources Research, v. 16, no. 2, p. 93-107, https://doi.org/10.1007/s11053-007-9038-5.","startPage":"93","endPage":"107","numberOfPages":"15","costCenters":[],"links":[{"id":212867,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11053-007-9038-5"},{"id":240425,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-06-02","publicationStatus":"PW","scienceBaseUri":"505a0024e4b0c8380cd4f5ea","contributors":{"authors":[{"text":"Arthur, J. D.","contributorId":67924,"corporation":false,"usgs":true,"family":"Arthur","given":"J.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":424705,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wood, H.A.R.","contributorId":10623,"corporation":false,"usgs":true,"family":"Wood","given":"H.A.R.","email":"","affiliations":[],"preferred":false,"id":424703,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Baker, A.E.","contributorId":54022,"corporation":false,"usgs":true,"family":"Baker","given":"A.E.","email":"","affiliations":[],"preferred":false,"id":424704,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cichon, J.R.","contributorId":68115,"corporation":false,"usgs":true,"family":"Cichon","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":424706,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Raines, G. L.","contributorId":90720,"corporation":false,"usgs":true,"family":"Raines","given":"G.","middleInitial":"L.","affiliations":[],"preferred":false,"id":424707,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
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