Short-term instability in the behaviour of a small, meandering alluvial channel is identified from the relation between sinuosity and either floodplain slope or channel slope within 17 reaches along an 81-kilometre section of the Belle Fourche River in western South Dakota. In reaches 1 to 4 and 11 to 17 the channel is relatively stable and sinuosity varies inversely with channel slope. In reaches 5 to 10, sinuosity is positively related to floodplain slope. Sinuosity increases markedly in reaches 5, 6, and 7 (which are immediately downstream from a discontinuity in the long profile of the floodplain) in association with an increase in floodplain slope. Immediately upstream from the discontinuity, bankfull channel depth and sinuosity decrease and the area of the floodplain reworked by meander migration between 1939 and 1981 increases, in association with a decrease in floodplain slope. Channel behaviour in reaches 5 to 10 is best explained as a consequence of neotectonic activity, as indicated by changes in elevation recorded along geodetic survey lines that cross lineaments that may delimit the eastern boundary of the Black Hills uplift. Sinuosity acts as a barometer of the effects of neotectonic activity on alluvial channels. Initial indications of channel and floodplain instability due to neotectonic activity may be derived from evidence of anomalously active channel migration, as documented from photographic or topographic sources.
","language":"English","publisher":"Wiley","doi":"10.1002/esp.3290160304","usgsCitation":"Gomez, B., and Marron, D.C., 1991, Neotectonic effects on sinuosity and channel migration, Belle Fourche River, Western South Dakota: Earth Surface Processes and Landforms, v. 16, no. 3, p. 227-235, https://doi.org/10.1002/esp.3290160304.","productDescription":"8 p. ","startPage":"227","endPage":"235","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":338084,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"South Dakota","otherGeospatial":"Belle Fourche River","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -103.34564208984375,\n 44.620287898534244\n ],\n [\n -103.32298278808594,\n 44.61637785698343\n ],\n [\n -103.21517944335938,\n 44.5435052132082\n ],\n [\n -103.11012268066405,\n 44.4190688110522\n ],\n [\n -103.02978515625,\n 44.38865427337759\n ],\n [\n -103.01193237304688,\n 44.422011314236634\n ],\n [\n -103.05587768554686,\n 44.476910857223224\n ],\n [\n -103.15887451171875,\n 44.61784415342067\n ],\n [\n -103.260498046875,\n 44.65839700490685\n ],\n [\n -103.37860107421875,\n 44.66865287227321\n ],\n [\n -103.52073669433594,\n 44.68476556953855\n ],\n [\n -103.623046875,\n 44.681348099056066\n ],\n [\n -103.71231079101562,\n 44.687694669498015\n ],\n [\n -103.78578186035156,\n 44.70868221820806\n ],\n [\n -103.79814147949219,\n 44.69111176558736\n ],\n [\n -103.77342224121092,\n 44.66767620116954\n ],\n [\n -103.70750427246094,\n 44.64423115768092\n ],\n [\n -103.63334655761719,\n 44.63445959194018\n ],\n [\n -103.34564208984375,\n 44.620287898534244\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"16","issue":"3","noUsgsAuthors":false,"publicationDate":"2006-07-25","publicationStatus":"PW","scienceBaseUri":"58d38d61e4b0236b68f98f80","contributors":{"authors":[{"text":"Gomez, Basil","contributorId":65475,"corporation":false,"usgs":true,"family":"Gomez","given":"Basil","email":"","affiliations":[],"preferred":false,"id":685715,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Marron, Donna C.","contributorId":6900,"corporation":false,"usgs":true,"family":"Marron","given":"Donna","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":685716,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70185490,"text":"70185490 - 1991 - Sampling design for groundwater solute transport: Tests of methods and analysis of Cape Cod tracer test data","interactions":[],"lastModifiedDate":"2018-02-27T11:36:12","indexId":"70185490","displayToPublicDate":"1991-05-01T00:00:00","publicationYear":"1991","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":"Sampling design for groundwater solute transport: Tests of methods and analysis of Cape Cod tracer test data","docAbstract":"Tests of a one-dimensional sampling design methodology on measurements of bromide concentration collected during the natural gradient tracer test conducted by the U.S. Geological Survey on Cape Cod, Massachusetts, demonstrate its efficacy for field studies of solute transport in groundwater and the utility of one-dimensional analysis. The methodology was applied to design of sparse two-dimensional networks of fully screened wells typical of those often used in engineering practice. In one-dimensional analysis, designs consist of the downstream distances to rows of wells oriented perpendicular to the groundwater flow direction and the timing of sampling to be carried out on each row. The power of a sampling design is measured by its effectiveness in simultaneously meeting objectives of model discrimination, parameter estimation, and cost minimization. One-dimensional models of solute transport, differing in processes affecting the solute and assumptions about the structure of the flow field, were considered for description of tracer cloud migration. When fitting each model using nonlinear regression, additive and multiplicative error forms were allowed for the residuals which consist of both random and model errors. The one-dimensional single-layer model of a nonreactive solute with multiplicative error was judged to be the best of those tested. Results show the efficacy of the methodology in designing sparse but powerful sampling networks. Designs that sample five rows of wells at five or fewer times in any given row performed as well for model discrimination as the full set of samples taken up to eight times in a given row from as many as 89 rows. Also, designs for parameter estimation judged to be good by the methodology were as effective in reducing the variance of parameter estimates as arbitrary designs with many more samples. Results further showed that estimates of velocity and longitudinal dispersivity in one-dimensional models based on data from only five rows of fully screened wells each sampled five or fewer times were practically equivalent to values determined from moments analysis of the complete three-dimensional set of 29,285 samples taken during 16 sampling times.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/90WR02657","usgsCitation":"Knopman, D.S., Voss, C.I., and Garabedian, S.P., 1991, Sampling design for groundwater solute transport: Tests of methods and analysis of Cape Cod tracer test data: Water Resources Research, v. 27, no. 5, p. 925-949, https://doi.org/10.1029/90WR02657.","productDescription":"25 p. ","startPage":"925","endPage":"949","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":338085,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"5","noUsgsAuthors":false,"publicationDate":"2008-01-08","publicationStatus":"PW","scienceBaseUri":"58d38d61e4b0236b68f98f7e","contributors":{"authors":[{"text":"Knopman, Debra S.","contributorId":51472,"corporation":false,"usgs":true,"family":"Knopman","given":"Debra","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":685719,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Voss, Clifford I. 0000-0001-5923-2752 cvoss@usgs.gov","orcid":"https://orcid.org/0000-0001-5923-2752","contributorId":1559,"corporation":false,"usgs":true,"family":"Voss","given":"Clifford","email":"cvoss@usgs.gov","middleInitial":"I.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":685720,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Garabedian, Stephen P.","contributorId":91090,"corporation":false,"usgs":true,"family":"Garabedian","given":"Stephen","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":685721,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70016712,"text":"70016712 - 1991 - Prospects for eruption prediction in near real-time","interactions":[],"lastModifiedDate":"2025-05-29T17:07:05.269703","indexId":"70016712","displayToPublicDate":"1991-04-25T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2840,"text":"Nature","active":true,"publicationSubtype":{"id":10}},"title":"Prospects for eruption prediction in near real-time","docAbstract":"The 'materials science' method for eruption prediction1–3 arises from the application of a general law governing the failure of materials: Ω⊙−α Ω¨ − A = 0, where A and α are empirical constants, and Ω is an observable quantity such as ground deformation, seismicity or gas emission. This law leads to the idea of the 'inverse-rate' plot, in which the time of failure can be estimated by extrapolation of the curve of Ω−1 versus time to a pre-deter-mined intercept. Here we suggest that this method can be combined with real-time seismic amplitude monitoring to provide a tool for near-real-time eruption prediction, and we demonstrate how it might have been used to predict two dome-growth episodes at Mount St Helens volcano in 1985 and 1986, and two explosive eruptions at Redoubt volcano in 1989–90.
","language":"English","publisher":"Springer Nature","doi":"10.1038/350695a0","issn":"00280836","usgsCitation":"Voight, B., and Cornelius, R.R., 1991, Prospects for eruption prediction in near real-time: Nature, v. 350, no. 6320, p. 695-698, https://doi.org/10.1038/350695a0.","productDescription":"4 p.","startPage":"695","endPage":"698","costCenters":[],"links":[{"id":224799,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Washington","otherGeospatial":"Mount St. Helens","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -122.29306253215135,\n 46.27326279023282\n ],\n [\n -122.29306253215135,\n 46.17151850775056\n ],\n [\n -122.06669011450889,\n 46.17151850775056\n ],\n [\n -122.06669011450889,\n 46.27326279023282\n ],\n [\n -122.29306253215135,\n 46.27326279023282\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"350","issue":"6320","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8f58e4b0c8380cd7f6ec","contributors":{"authors":[{"text":"Voight, B.","contributorId":16575,"corporation":false,"usgs":true,"family":"Voight","given":"B.","affiliations":[],"preferred":false,"id":374286,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cornelius, Reinold R.","contributorId":88092,"corporation":false,"usgs":true,"family":"Cornelius","given":"Reinold","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":374287,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70126456,"text":"70126456 - 1991 - A whale of a new species","interactions":[],"lastModifiedDate":"2014-09-23T10:56:01","indexId":"70126456","displayToPublicDate":"1991-04-18T10:52:27","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2840,"text":"Nature","active":true,"publicationSubtype":{"id":10}},"title":"A whale of a new species","docAbstract":"No abstract available.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Nature","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Macmillan Journals Ltd","publisherLocation":"London","doi":"10.1038/350560a0","usgsCitation":"Ralls, K., and Brownell, R.L., 1991, A whale of a new species: Nature, v. 350, no. 560, 1 p., https://doi.org/10.1038/350560a0.","productDescription":"1 p.","numberOfPages":"1","costCenters":[],"links":[{"id":488280,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1038/350560a0","text":"Publisher Index Page"},{"id":294306,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":294305,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1038/350560a0"}],"volume":"350","issue":"560","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5422bb0be4b08312ac7ceed3","contributors":{"authors":[{"text":"Ralls, Katharine","contributorId":43691,"corporation":false,"usgs":true,"family":"Ralls","given":"Katharine","email":"","affiliations":[],"preferred":false,"id":502051,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brownell, Robert L. Jr.","contributorId":62948,"corporation":false,"usgs":true,"family":"Brownell","given":"Robert","suffix":"Jr.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":502052,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70125952,"text":"70125952 - 1991 - Xerus rutilus","interactions":[],"lastModifiedDate":"2025-05-09T15:59:29.431885","indexId":"70125952","displayToPublicDate":"1991-04-12T11:35:52","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2654,"text":"Mammalian Species","active":true,"publicationSubtype":{"id":10}},"title":"Xerus rutilus","docAbstract":"No abstract available.","language":"English","publisher":"American Society of Mammalogists","doi":"10.2307/3504277","usgsCitation":"O'Shea, T., 1991, Xerus rutilus: Mammalian Species, v. 370, p. 1-5, https://doi.org/10.2307/3504277.","productDescription":"5 p.","startPage":"1","endPage":"5","costCenters":[],"links":[{"id":488272,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.2307/3504277","text":"Publisher Index Page"},{"id":294135,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"370","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"541bf466e4b0e96537ddf932","contributors":{"authors":[{"text":"O'Shea, T. J. 0000-0002-0758-9730","orcid":"https://orcid.org/0000-0002-0758-9730","contributorId":50100,"corporation":false,"usgs":true,"family":"O'Shea","given":"T. J.","affiliations":[],"preferred":false,"id":501760,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70125936,"text":"70125936 - 1991 - Platyrrhinus helleri","interactions":[],"lastModifiedDate":"2025-05-09T15:56:09.67422","indexId":"70125936","displayToPublicDate":"1991-04-12T10:34:53","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2654,"text":"Mammalian Species","active":true,"publicationSubtype":{"id":10}},"title":"Platyrrhinus helleri","docAbstract":"No abstract available.","language":"English","publisher":"American Society of Mammalogists","doi":"10.2307/3504092","usgsCitation":"Ferrell, C., and Wilson, D.E., 1991, Platyrrhinus helleri: Mammalian Species, v. 373, p. 1-5, https://doi.org/10.2307/3504092.","productDescription":"5 p.","startPage":"1","endPage":"5","costCenters":[],"links":[{"id":503816,"rank":2,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://zotero.org/groups/5435545/items/XI24I6VV","text":"External Repository"},{"id":294120,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"373","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"541bf449e4b0e96537ddf7f0","contributors":{"authors":[{"text":"Ferrell, C.S.","contributorId":79204,"corporation":false,"usgs":true,"family":"Ferrell","given":"C.S.","email":"","affiliations":[],"preferred":false,"id":501730,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilson, Don E.","contributorId":22254,"corporation":false,"usgs":true,"family":"Wilson","given":"Don","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":501729,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70016575,"text":"70016575 - 1991 - Magellan: Radar performance and data products","interactions":[],"lastModifiedDate":"2025-09-19T15:45:18.006354","indexId":"70016575","displayToPublicDate":"1991-04-12T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Magellan: Radar performance and data products","docAbstract":"The Magellan Venus orbiter carries only one scientific instrument: a 12.6-centimeter wavelength radar system shared among three data-taking modes. The synthetic-aperture mode images radar echoes from the Venus surface at a resolution of between 120 and 300 meters, depending on spacecraft altitude. In the altimetric mode, relative height measurement accuracies may approach 5 meters, depending on the terrain's roughness, although orbital uncertainties place a floor of about 50 meters on the absolute uncertainty. In areas of extremely rough topography, accuracy is limited by the inherent line-of-sight radar resolution of about 88 meters. The maximum elevation observed to date, corresponding to a planetary radius of 6062 kilometers, lies within Maxwell Mons. When used as a thermal emission radiometer, the system can determine surface emissivities to an absolute accuracy of about 0.02. Mosaicked and archival digital data products will be released in compact disk (CDROM) format.
","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.252.5003.260","issn":"00368075","usgsCitation":"Pettengill, G., Ford, P., Johnson, W., Raney, R., and Soderblom, L.A., 1991, Magellan: Radar performance and data products: Science, v. 252, no. 5003, p. 260-265, https://doi.org/10.1126/science.252.5003.260.","productDescription":"6 p.","startPage":"260","endPage":"265","costCenters":[],"links":[{"id":223016,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"252","issue":"5003","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4b2de4b0c8380cd69349","contributors":{"authors":[{"text":"Pettengill, G.H.","contributorId":43899,"corporation":false,"usgs":true,"family":"Pettengill","given":"G.H.","email":"","affiliations":[],"preferred":false,"id":373936,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ford, P.G.","contributorId":62342,"corporation":false,"usgs":true,"family":"Ford","given":"P.G.","email":"","affiliations":[],"preferred":false,"id":373937,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Johnson, W.T.K.","contributorId":27174,"corporation":false,"usgs":true,"family":"Johnson","given":"W.T.K.","email":"","affiliations":[],"preferred":false,"id":373934,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Raney, R.K.","contributorId":27613,"corporation":false,"usgs":true,"family":"Raney","given":"R.K.","email":"","affiliations":[],"preferred":false,"id":373935,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Soderblom, Laurence A. 0000-0002-0917-853X lsoderblom@usgs.gov","orcid":"https://orcid.org/0000-0002-0917-853X","contributorId":2721,"corporation":false,"usgs":true,"family":"Soderblom","given":"Laurence","email":"lsoderblom@usgs.gov","middleInitial":"A.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":373933,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70016574,"text":"70016574 - 1991 - Impact craters on Venus: Initial analysis from Magellan","interactions":[],"lastModifiedDate":"2025-09-19T16:02:11.003383","indexId":"70016574","displayToPublicDate":"1991-04-12T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Impact craters on Venus: Initial analysis from Magellan","docAbstract":"Magellan radar images of 15 percent of the planet show 135 craters of probable impact origin. Craters more than 15 km across tend to contain central peaks, multiple central peaks, and peak rings. Many craters smaller than 15 km exhibit multiple floors or appear in clusters; these phenomena are attributed to atmospheric breakup of incoming meteoroids. Additionally, the atmosphere appears to have prevented the formation of primary impact craters smaller than about 3 km and produced a deficiency in the number of craters smaller than about 25 km across. Ejecta is found at greater distances than that predicted by simple ballistic emplacement, and the distal ends of some ejecta deposits are lobate. These characteristics may represent surface flows of material initially entrained in the atmosphere. Many craters are surrounded by zones of low radar albedo whose origin may have been deformation of the surface by the shock or pressure wave associated with the incoming meteoroid. Craters are absent from several large areas such as a 5 million square kilometer region around Sappho Patera, where the most likely explanation for the dearth of craters is volcanic resurfacing. There is apparently a spectrum of surface ages on Venus ranging approximately from 0 to 800 million years, and therefore Venus must be a geologically active planet.
","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.252.5003.288","issn":"00368075","usgsCitation":"Phillips, R., Arvidson, R., Boyce, J.M., Campbell, D., Guest, J.E., Schaber, G.G., and Soderblom, L.A., 1991, Impact craters on Venus: Initial analysis from Magellan: Science, v. 252, no. 5003, p. 288-297, https://doi.org/10.1126/science.252.5003.288.","productDescription":"10 p.","startPage":"288","endPage":"297","costCenters":[],"links":[{"id":223015,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"252","issue":"5003","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a38ace4b0c8380cd61653","contributors":{"authors":[{"text":"Phillips, R.J.","contributorId":93174,"corporation":false,"usgs":true,"family":"Phillips","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":373931,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Arvidson, R. E.","contributorId":46666,"corporation":false,"usgs":true,"family":"Arvidson","given":"R. E.","affiliations":[],"preferred":false,"id":373928,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Boyce, J. M.","contributorId":85952,"corporation":false,"usgs":true,"family":"Boyce","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":373930,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Campbell, D.B.","contributorId":35753,"corporation":false,"usgs":true,"family":"Campbell","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":373927,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Guest, J. E.","contributorId":98749,"corporation":false,"usgs":true,"family":"Guest","given":"J.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":373932,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Schaber, Gerald G.","contributorId":12511,"corporation":false,"usgs":true,"family":"Schaber","given":"Gerald","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":373929,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Soderblom, Laurence A. 0000-0002-0917-853X lsoderblom@usgs.gov","orcid":"https://orcid.org/0000-0002-0917-853X","contributorId":2721,"corporation":false,"usgs":true,"family":"Soderblom","given":"Laurence","email":"lsoderblom@usgs.gov","middleInitial":"A.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":373926,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70016722,"text":"70016722 - 1991 - Venus volcanism: Initial analysis from Magellan data","interactions":[],"lastModifiedDate":"2025-09-19T15:56:21.158735","indexId":"70016722","displayToPublicDate":"1991-04-12T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Venus volcanism: Initial analysis from Magellan data","docAbstract":"Magellan images confirm that volcanism is widespread and has been fundamentally important in the formation and evolution of the crust of Venus. High-resolution imaging data reveal evidence for intrusion (dike formation and cryptodomes) and extrusion (a wide range of lava flows). Also observed are thousands of small shield volcanoes, larger edifices up to several hundred kilometers in diameter, massive outpourings of lavas, and local pyroclastic deposits. Although most features are consistent with basaltic compositions, a number of large pancake-like domes are morphologically similar to rhyolite-dacite domes on Earth. Flows and sinuous channels with lengths of many hundreds of kilometers suggest that extremely high effusion rates or very fluid magmas (perhaps komatiites) may be present. Volcanism is evident in various tectonic settings (coronae, linear extensional and compressional zones, mountain belts, upland rises, highland plateaus, and tesserae). Volcanic resurfacing rates appear to be low (less than 2 km3/yr) but the significance of dike formation and intrusions, and the mode of crustal formation and loss remain to be established.
","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.252.5003.276","issn":"00368075","usgsCitation":"Head, J., Campbell, D., Elachi, C., Guest, J.E., Mckenzie, D., Saunders, R., Schaber, G.G., and Schubert, G., 1991, Venus volcanism: Initial analysis from Magellan data: Science, v. 252, no. 5003, p. 276-288, https://doi.org/10.1126/science.252.5003.276.","productDescription":"13 p.","startPage":"276","endPage":"288","costCenters":[],"links":[{"id":224985,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"252","issue":"5003","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc212e4b08c986b32a8e9","contributors":{"authors":[{"text":"Head, J.W.","contributorId":67982,"corporation":false,"usgs":true,"family":"Head","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":374312,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Campbell, D.B.","contributorId":35753,"corporation":false,"usgs":true,"family":"Campbell","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":374310,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Elachi, C.","contributorId":104606,"corporation":false,"usgs":false,"family":"Elachi","given":"C.","affiliations":[],"preferred":false,"id":374316,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Guest, J. E.","contributorId":98749,"corporation":false,"usgs":true,"family":"Guest","given":"J.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":374315,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mckenzie, D.P.","contributorId":84914,"corporation":false,"usgs":true,"family":"Mckenzie","given":"D.P.","email":"","affiliations":[],"preferred":false,"id":374314,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Saunders, R.S.","contributorId":14437,"corporation":false,"usgs":true,"family":"Saunders","given":"R.S.","email":"","affiliations":[],"preferred":false,"id":374309,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Schaber, Gerald G.","contributorId":12511,"corporation":false,"usgs":true,"family":"Schaber","given":"Gerald","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":374313,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Schubert, Gerald","contributorId":172425,"corporation":false,"usgs":false,"family":"Schubert","given":"Gerald","email":"","affiliations":[],"preferred":false,"id":374311,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70016629,"text":"70016629 - 1991 - Mantle phase changes and deep-earthquake faulting in subducting lithosphere","interactions":[],"lastModifiedDate":"2025-09-19T15:41:40.998571","indexId":"70016629","displayToPublicDate":"1991-04-12T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Mantle phase changes and deep-earthquake faulting in subducting lithosphere","docAbstract":"Inclined zones of earthquakes are the primary expression of lithosphere subduction. A distinct deep population of subduction-zone earthquakes occurs at depths of 350 to 690 kilometers. At those depths ordinary brittle fracture and frictional sliding, the faulting processes of shallow earthquakes, are not expected. A fresh understanding of these deep earthquakes comes from developments in several areas of experimental and theoretical geophysics, including the discovery and characterization of transformational faulting, a shear instability connected with localized phase transformations under nonhydrostatic stress. These developments support the hypothesis that deep earthquakes represent transformational faulting in a wedge of olivine-rich peridotite that is likely to persist metastably in coldest plate interiors to depths as great as 690 km. Predictions based on this deep structure of mantle phase changes are consistent with the global depth distribution of deep earthquakes, the maximum depths of earthquakes in individual subductions zones, and key source characteristics of deep events.
","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.252.5003.216","issn":"00368075","usgsCitation":"Kirby, S.H., Durham, W., and Stern, L., 1991, Mantle phase changes and deep-earthquake faulting in subducting lithosphere: Science, v. 252, no. 5003, p. 216-225, https://doi.org/10.1126/science.252.5003.216.","productDescription":"10 p.","startPage":"216","endPage":"225","costCenters":[],"links":[{"id":225120,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"252","issue":"5003","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4cd6e4b0c8380cd69f2d","contributors":{"authors":[{"text":"Kirby, Stephen H. 0000-0003-1636-4688 skirby@usgs.gov","orcid":"https://orcid.org/0000-0003-1636-4688","contributorId":2752,"corporation":false,"usgs":true,"family":"Kirby","given":"Stephen","email":"skirby@usgs.gov","middleInitial":"H.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":374076,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Durham, W.B.","contributorId":72135,"corporation":false,"usgs":true,"family":"Durham","given":"W.B.","email":"","affiliations":[],"preferred":false,"id":374077,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Stern, L.A.","contributorId":38293,"corporation":false,"usgs":true,"family":"Stern","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":374075,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70210206,"text":"70210206 - 1991 - Basin and range crustal and upper mantle structure, northwest to central Nevada","interactions":[],"lastModifiedDate":"2020-05-20T14:33:31.39634","indexId":"70210206","displayToPublicDate":"1991-04-10T09:27:04","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2314,"text":"Journal of Geophysical Research B: Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Basin and range crustal and upper mantle structure, northwest to central Nevada","docAbstract":"We present an interpretation of the crustal and uppermost mantle structure of the Basin and Range of northwestern Nevada based on seismic refraction/wide‐angle reflection, near‐vertical reflection, and gravity data. In comparison to most previous estimates, we find that the crust is somewhat thicker (32–36 km versus 22–30 km), and the uppermost mantle velocity is somewhat higher (8.0 km/s versus 7.3–7.9 km/s). Along our transects, the crust is thinnest (32 km) in the Carson Sink‐Buena Vista Valley region and increases by 2–4 km to the west and east, respectively. There is considerable complexity throughout the crust where velocities range from of 2.5 km/s at the surface to 7.4 km/s in the lowermost crust. Variations in velocity and structure of the upper crustal layers reveal apparent basement velocity depressions (areas of lower velocities extending up to 10 km in depth) that underlie some surface ranges as well as the basins. The middle crust rises from about 20 km beneath central Nevada to within 12 km of the surface beneath the area of thinnest crust and is characterized by a modest (∼0.1 km/s) change in velocity and low‐velocity gradients. These midcrustal layers mark the onset of high crustal reflectivity and the apparent limiting depth to which Basin and Range faults can be traced in near‐vertical reflection profiles, suggesting that these midcrustal layers represent the transition between the brittle and ductile zones of the crust. The lower crust is more structurally complex, with layers thickening and thinning in a systematic manner with the upper crustal layers; generally, where there are velocity depressions in the upper crust, the lower crust is thickest and shallowest. The geometry of these lower crustal layers (derived from refraction modeling) coincides with changes in the crustal reflectivity, determined from the Consortium of Continental Reflection Profiling reflection data. The lower crustal layer is unusually high in velocity (7.4 km/s) and is likely the layer identified as mantle in some previous studies. We do not identify the 7.4 km/s layer as mantle because (1) there is an underlying layer with a velocity (8.0 km/s) that is more consistent with the worldwide average velocity for the upper mantle, and (2) the 7.4 km/s layer does not correspond to the “reflection” Moho. Gravity modeling and comparison to existing seismic models show a general consensus in many aspects with respect to crustal structure. This new model forms the basis for speculation on some of the processes associated with rifting of the Basin and Range Province. One such process, lithospheric magmatism, is inferred from the strong attenuation of transmitted seismic waves, which occurs at the same interface at which high‐amplitude, bright spot reflections originate. Unlike previous models, the overall structure and velocity of the crust and uppermost mantle of our new model are similar to other regions worldwide which have undergone high degrees of extension.
Reduction of the soluble, oxidized form of uranium, U(VI), to insoluble U(IV) is an important mechanism for the immobilization of uranium in aquatic sediments and for the formation of some uranium ores1–10. U(VI) reduction has generally been regarded as an abiological reaction in which sulphide, molecular hydrogen or organic compounds function as the reductant1,2,5,11. Microbial involvement in U(VI) reduction has been considered to be limited to indirect effects, such as microbial metabolism providing the reduced compounds for abiological U(VI) reduction and microbial cell walls providing a surface to stimulate abiological U(VI) reduction1,12,13. We report here, however, that dissimilatory Fe(III)-reducing microorganisms can obtain energy for growth by electron transport to U(VI). This novel form of microbial metabolism can be much faster than commonly cited abiological mechanisms for U(VI) reduction. Not only do these findings expand the known potential terminal electron acceptors for microbial energy transduction, they offer a likely explanation for the deposition of uranium in aquatic sediments and aquifers, and suggest a method for biological remediation of environments contaminated with uranium.
","language":"English","publisher":"Springer Nature","doi":"10.1038/350413a0","issn":"00280836","usgsCitation":"Lovley, D.R., Phillips, E.J., Gorby, Y., and Landa, E.R., 1991, Microbial reduction of uranium: Nature, v. 350, no. 6317, p. 413-416, https://doi.org/10.1038/350413a0.","productDescription":"4 p.","startPage":"413","endPage":"416","costCenters":[],"links":[{"id":225172,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"350","issue":"6317","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a565de4b0c8380cd6d540","contributors":{"authors":[{"text":"Lovley, Derek R.","contributorId":107852,"corporation":false,"usgs":true,"family":"Lovley","given":"Derek","middleInitial":"R.","affiliations":[],"preferred":false,"id":374083,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Phillips, Elizabeth J.P.","contributorId":37475,"corporation":false,"usgs":true,"family":"Phillips","given":"Elizabeth","middleInitial":"J.P.","affiliations":[],"preferred":false,"id":374080,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gorby, Y.A.","contributorId":64815,"corporation":false,"usgs":true,"family":"Gorby","given":"Y.A.","affiliations":[],"preferred":false,"id":374081,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Landa, E. R.","contributorId":100002,"corporation":false,"usgs":true,"family":"Landa","given":"E.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":374082,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70209351,"text":"70209351 - 1991 - U–Pb geochronology of Late Cretaceous and early Tertiary plutons in the northern Coast Mountains batholith","interactions":[],"lastModifiedDate":"2020-04-01T13:57:37","indexId":"70209351","displayToPublicDate":"1991-04-01T13:49:11","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1168,"text":"Canadian Journal of Earth Sciences","active":true,"publicationSubtype":{"id":10}},"title":"U–Pb geochronology of Late Cretaceous and early Tertiary plutons in the northern Coast Mountains batholith","docAbstract":"U–Pb geochronologic studies demonstrate that steeply dipping, sheetlike tonalitic plutons along the western margin of the northern Coast Mountains batholith were emplaced between ~83 and ~57 (perhaps ~55) Ma. Less elongate tonalitic–granodioritic bodies in central portions of the batholith yield ages of 59–58 Ma, coeval with younger phases of the tonalitic sheets. Large granite–granodiorite bodies in central and eastern portions of the batholith were emplaced at 51–48 Ma. Trends in ages suggest that the tonalitic bodies generally become younger southeastward and that, at the latitude of Juneau, plutonism migrated northeastward across the batholith at ~0.9 km/Ma. Variations in the age, shape, location, and degree of fabric development among the various plutons indicate that Late Cretaceous – Paleocene tonalitic bodies were emplaced into a steeply dipping, dip-slip shear zone that was active along the western margin of the batholith. Postkinematic Eocene plutons were emplaced at shallow crustal levels. Inherited zircon components in these plutons range in age from mid-Paleozoic to Early Proterozoic and are coeval with detrital zircons in adjacent metasedimentary rocks. These old zircons, combined with evolved Nd isotopic signatures for most plutons, record assimilation of continental crustal or supracrustal rocks during the generation and (or) ascent of the plutons.
","language":"English","publisher":"Canadian Science Publishing","doi":"10.1139/e91-082","usgsCitation":"Gehrels, G., McClelland, W.C., Sampson, S., Jonathan, P.P., and Brew, D.A., 1991, U–Pb geochronology of Late Cretaceous and early Tertiary plutons in the northern Coast Mountains batholith: Canadian Journal of Earth Sciences, v. 28, no. 6, p. 899-911, https://doi.org/10.1139/e91-082.","productDescription":"13 p.","startPage":"899","endPage":"911","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":373718,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Northern Coast Mountains","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -135.087890625,\n 59.5343180010956\n ],\n [\n -138.076171875,\n 58.53959476664049\n ],\n [\n -133.2421875,\n 54.16243396806779\n ],\n [\n -129.814453125,\n 55.27911529201561\n ],\n [\n -135.087890625,\n 59.5343180010956\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"28","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Gehrels, G.E.","contributorId":211571,"corporation":false,"usgs":false,"family":"Gehrels","given":"G.E.","email":"","affiliations":[{"id":7042,"text":"University of Arizona","active":true,"usgs":false}],"preferred":false,"id":786249,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McClelland, W. C.","contributorId":147243,"corporation":false,"usgs":false,"family":"McClelland","given":"W.","email":"","middleInitial":"C.","affiliations":[{"id":6768,"text":"University of Iowa","active":true,"usgs":false}],"preferred":false,"id":786250,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sampson, S.D.","contributorId":20144,"corporation":false,"usgs":true,"family":"Sampson","given":"S.D.","email":"","affiliations":[],"preferred":false,"id":786251,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jonathan, Patchett P.","contributorId":85323,"corporation":false,"usgs":true,"family":"Jonathan","given":"Patchett","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":786252,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Brew, David A. dbrew@usgs.gov","contributorId":3244,"corporation":false,"usgs":true,"family":"Brew","given":"David","email":"dbrew@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":786253,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70207368,"text":"70207368 - 1991 - A model of volcanic dome-hosted precious metal deposits in Bolivia","interactions":[],"lastModifiedDate":"2019-12-19T07:20:40","indexId":"70207368","displayToPublicDate":"1991-04-01T12:04:39","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"A model of volcanic dome-hosted precious metal deposits in Bolivia","docAbstract":"No abstract available.
","language":"English","doi":"10.2113/gsecongeo.86.2.415","issn":"03610128","usgsCitation":"Cunningham, C.G., McNamee, J., Vasquez, J., and Ericksen, G.E., 1991, A model of volcanic dome-hosted precious metal deposits in Bolivia: Economic Geology, v. 86, no. 2, p. 415-421, https://doi.org/10.2113/gsecongeo.86.2.415.","productDescription":"7 p. ","startPage":"415","endPage":"421","costCenters":[],"links":[{"id":370411,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Bolivia","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-62.84647,-22.03499],[-63.98684,-21.99364],[-64.37702,-22.79809],[-64.96489,-22.07586],[-66.27334,-21.83231],[-67.10667,-22.73592],[-67.82818,-22.87292],[-68.21991,-21.49435],[-68.75717,-20.37266],[-68.44223,-19.40507],[-68.96682,-18.98168],[-69.10025,-18.26013],[-69.59042,-17.58001],[-68.95964,-16.5007],[-69.38976,-15.66013],[-69.16035,-15.32397],[-69.33953,-14.9532],[-68.94889,-14.45364],[-68.92922,-13.60268],[-68.88008,-12.89973],[-68.66508,-12.5613],[-69.52968,-10.95173],[-68.78616,-11.03638],[-68.27125,-11.01452],[-68.04819,-10.71206],[-67.1738,-10.30681],[-66.64691,-9.93133],[-65.33844,-9.76199],[-65.44484,-10.51145],[-65.3219,-10.89587],[-65.40228,-11.56627],[-64.31635,-12.46198],[-63.1965,-12.62703],[-62.80306,-13.00065],[-62.12708,-13.19878],[-61.7132,-13.4892],[-61.08412,-13.47938],[-60.5033,-13.77595],[-60.4592,-14.35401],[-60.26433,-14.64598],[-60.25115,-15.07722],[-60.54297,-15.09391],[-60.15839,-16.25828],[-58.24122,-16.29957],[-58.38806,-16.87711],[-58.2808,-17.27171],[-57.73456,-17.55247],[-57.49837,-18.17419],[-57.67601,-18.96184],[-57.95,-19.4],[-57.8538,-19.97],[-58.16639,-20.1767],[-58.18347,-19.8684],[-59.11504,-19.35691],[-60.04356,-19.34275],[-61.78633,-19.63374],[-62.26596,-20.51373],[-62.29118,-21.05163],[-62.68506,-22.24903],[-62.84647,-22.03499]]]},\"properties\":{\"name\":\"Bolivia\"}}]}","volume":"86","issue":"2","noUsgsAuthors":false,"publicationDate":"1991-04-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Cunningham, Charles G.","contributorId":85940,"corporation":false,"usgs":true,"family":"Cunningham","given":"Charles","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":777916,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McNamee, J.","contributorId":221320,"corporation":false,"usgs":false,"family":"McNamee","given":"J.","email":"","affiliations":[],"preferred":false,"id":777832,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Vasquez, J.P.","contributorId":221319,"corporation":false,"usgs":false,"family":"Vasquez","given":"J.P.","email":"","affiliations":[],"preferred":false,"id":777833,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ericksen, G. E.","contributorId":44538,"corporation":false,"usgs":true,"family":"Ericksen","given":"G.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":777834,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70126935,"text":"70126935 - 1991 - Aquatic habitat measurement and valuation: imputing social benefits to instream flow levels","interactions":[],"lastModifiedDate":"2014-09-25T10:17:54","indexId":"70126935","displayToPublicDate":"1991-04-01T10:16:38","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2258,"text":"Journal of Environmental Management","active":true,"publicationSubtype":{"id":10}},"title":"Aquatic habitat measurement and valuation: imputing social benefits to instream flow levels","docAbstract":"Instream flow conflicts have been analysed from the perspectives offered by policy oriented applied (physical) science, theories of conflict resolution and negotiation strategy, and psychological analyses of the behavior patterns of the bargaining parties. Economics also offers some useful insights in analysing conflict resolution within the context of these water allocation problems. We attempt to analyse the economics of the bargaining process in conjunction with a discussion of the water allocation process. In particular, we examine in detail the relation between certain habitat estimation techniques, and the socially optimal allocation of non-market resources. The results developed here describe the welfare implications implicit in the contemporary general equilibrium analysis of a competitive market economy. We also review certain currently available techniques for assigning dollar values to the social benefits of instream flow. The limitations of non-market valuation techniques with respect to estimating the benefits provided by instream flows and the aquatic habitat contingent on these flows should not deter resource managers from using economic analysis as a basic tool for settling instream flow conflicts.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Environmental Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Academic Press","publisherLocation":"London","doi":"10.1016/S0301-4797(05)80057-X","usgsCitation":"Douglas, A.J., and Johnson, R.L., 1991, Aquatic habitat measurement and valuation: imputing social benefits to instream flow levels: Journal of Environmental Management, v. 32, no. 3, p. 267-280, https://doi.org/10.1016/S0301-4797(05)80057-X.","productDescription":"14 p.","startPage":"267","endPage":"280","numberOfPages":"14","costCenters":[],"links":[{"id":294478,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":294477,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0301-4797(05)80057-X"}],"volume":"32","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"54252ea0e4b0e641df8a6e97","contributors":{"authors":[{"text":"Douglas, Aaron J.","contributorId":46879,"corporation":false,"usgs":true,"family":"Douglas","given":"Aaron","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":502202,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Johnson, Richard L.","contributorId":32626,"corporation":false,"usgs":true,"family":"Johnson","given":"Richard","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":502201,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70243173,"text":"70243173 - 1991 - Single-station decomposition of seismograms for subevent time histories","interactions":[],"lastModifiedDate":"2023-05-02T14:52:36.502297","indexId":"70243173","displayToPublicDate":"1991-04-01T09:33:22","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1803,"text":"Geophysical Journal International","active":true,"publicationSubtype":{"id":10}},"title":"Single-station decomposition of seismograms for subevent time histories","docAbstract":"We have adapted an iterative least-squares inversion with positivity constraints to the problem of deconvolving the recordings of a small earthquake from the recordings of a large composite earthquake. The inversion uses an F test to minimize the number of non-zero amplitudes or subevents in the solution set, by requiring each added subevent to reduce the variance significantly. We apply this inversion to the analysis of strong motion recordings of a set of moderate-sized (4.0 ≤ ML ≤ 6.4) aftershocks of the 1976 Friuli earthquake. The earthquake pairs are selected by comparing S trigger times and polarization diagrams. The deconvolved time series are interpreted as the time history of slip events or stress release in the composite earthquake, depending on whether the recordings of the small earthquake are unfiltered or filtered to simulate the waveforms radiated by subevents. Deconvolving with the filtered recordings reduces the variance more rapidly, as a function of the number of subevents, than deconvolving with the unfiltered recordings. The deconvolved time series for three of the four earthquakes analysed indicate that the rupture processes resemble the failure of asperities where the initial subevent has the largest stress drop and the later subevents have longer durations and weaker stress drops.
","language":"English","publisher":"Oxford Academic Press","doi":"10.1111/j.1365-246X.1991.tb03447.x","usgsCitation":"Di Bona, M., and Boatwright, J., 1991, Single-station decomposition of seismograms for subevent time histories: Geophysical Journal International, v. 105, no. 1, p. 103-117, https://doi.org/10.1111/j.1365-246X.1991.tb03447.x.","productDescription":"15 p.","startPage":"103","endPage":"117","costCenters":[],"links":[{"id":479683,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1365-246x.1991.tb03447.x","text":"Publisher Index Page"},{"id":416622,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"105","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Di Bona, Massimo","contributorId":304692,"corporation":false,"usgs":false,"family":"Di Bona","given":"Massimo","email":"","affiliations":[],"preferred":false,"id":871368,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boatwright, John 0000-0002-6931-5241 boat@usgs.gov","orcid":"https://orcid.org/0000-0002-6931-5241","contributorId":1938,"corporation":false,"usgs":true,"family":"Boatwright","given":"John","email":"boat@usgs.gov","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":871369,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70185493,"text":"70185493 - 1991 - Comment on the treatment of residual water content in “A consistent set of parametric models for the two-phase flow of immiscible fluids in the subsurface” by L. Luckner et al.","interactions":[],"lastModifiedDate":"2018-02-27T11:52:58","indexId":"70185493","displayToPublicDate":"1991-04-01T00:00:00","publicationYear":"1991","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":"Comment on the treatment of residual water content in “A consistent set of parametric models for the two-phase flow of immiscible fluids in the subsurface” by L. Luckner et al.","docAbstract":"Luckner et al. [1989] (hereinafter LVN) present a clear summary and generalization of popular formulations used for convenient representation of porous media fluid flow characteristics, including water content (θ) related to suction (h) and hydraulic conductivity (K) related to θ or h. One essential but problematic element in the LVN models is the concept of residual water content (θr; in LVN, θw,r). Most studies using θr determine its value as a fitted parameter and make the assumption that liquid flow processes are negligible at θ values less than θr. While the LVN paper contributes a valuable discussion of the nature of θr, it leaves several problems unresolved, including fundamental difficulties in associating a definite physical condition with θr, practical inadequacies of the models at low θ values, and difficulties in designating a main wetting curve.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/91WR00165","usgsCitation":"Nimmo, J.R., 1991, Comment on the treatment of residual water content in “A consistent set of parametric models for the two-phase flow of immiscible fluids in the subsurface” by L. Luckner et al.: Water Resources Research, v. 27, no. 4, p. 661-662, https://doi.org/10.1029/91WR00165.","productDescription":"2 p. ","startPage":"661","endPage":"662","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":338089,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"4","noUsgsAuthors":false,"publicationDate":"2008-01-08","publicationStatus":"PW","scienceBaseUri":"58d38d61e4b0236b68f98f84","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":685731,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":1014736,"text":"1014736 - 1991 - In vivo and in vitro transfer of trout spleen sections for early analysis of the immune response","interactions":[],"lastModifiedDate":"2023-10-27T15:10:20.305273","indexId":"1014736","displayToPublicDate":"1991-04-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1654,"text":"Fish and Shellfish Pathology","active":true,"publicationSubtype":{"id":10}},"displayTitle":"In vivo and in vitro transfer of trout spleen sections for early analysis of the immune response","title":"In vivo and in vitro transfer of trout spleen sections for early analysis of the immune response","docAbstract":"To determine the earliest time after in vivo immunisation that the spleen could be excised and held in vitro to detect an immune response, lake trout (Salvelinus namaycush) were exposed to DNP-Ficoll or Yersinia ruckeri O antigen administered by intraperitoneal injection or by bath. The spleens were excised from the fish at selected times after immunisation, placed in vitro and held in tissue culture media at 14°C until 10 days after the in vivo immunisation. They then were analysed for an immune response by counting the numbers of plaqueforming cells (PFC). PFC were first detected in samples taken 3 days after injection with either antigen. With bath immunisation, however, PFC were first seen 6 days post-immunisation when using the Y. ruckeri O antigen and no PFC above background levels appeared in fish bathed in the DNP-Ficoll solution. On day 10 after immunisation, the spleens taken directly from immunised fish always produced more PFC than when the spleens were taken through in vitro culture. A unique feature of this method, is that an immune response to an antigen may be detected by excising the spleen and holding it in in vitro culture without necessarily holding the fish for long periods of time after antigen injection or bath. This technique also adds more information on how rapidly the bacterins or antigens are processed by fish to initiate an immune response.
","language":"English","publisher":"Elsevier","doi":"10.1016/S1050-4648(06)80010-0","usgsCitation":"Anderson, D.P., Dixon, O.W., and Lizzio, E.F., 1991, In vivo and in vitro transfer of trout spleen sections for early analysis of the immune response: Fish and Shellfish Pathology, v. 1, no. 2, p. 99-105, https://doi.org/10.1016/S1050-4648(06)80010-0.","productDescription":"7 p.","startPage":"99","endPage":"105","numberOfPages":"7","costCenters":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"links":[{"id":129242,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"1","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49fce4b07f02db5f5a4c","contributors":{"authors":[{"text":"Anderson, D. P.","contributorId":32469,"corporation":false,"usgs":true,"family":"Anderson","given":"D.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":321044,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dixon, O. W.","contributorId":101588,"corporation":false,"usgs":true,"family":"Dixon","given":"O.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":321046,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lizzio, E. F.","contributorId":50471,"corporation":false,"usgs":true,"family":"Lizzio","given":"E.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":321045,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":1008065,"text":"1008065 - 1991 - Density cycles in an island population of deer mice, Peromyscus maniculatus","interactions":[],"lastModifiedDate":"2025-06-04T15:05:16.652185","indexId":"1008065","displayToPublicDate":"1991-04-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2939,"text":"Oikos","active":true,"publicationSubtype":{"id":10}},"title":"Density cycles in an island population of deer mice, Peromyscus maniculatus","docAbstract":"We report on eight years of data for a population of deer mice (Peromyscus maniculatus) on Santa Barbara Island, California which reaches exceptionally high densities and fluctuates markedly in an apparent three- to four-year cycle. The cyclic increase follows winters with high rainfall, and the decline may be similarly associated with low rainfall winters. The peak and early decline is marked by nearly complete cessation of breeding, along with heavy predation by barn owls (Tyto alba), whose numbers track those of the deer mice. This island population of Peromyscus differs from the well-established pattern for the species on the mainland, where populations occur in low to moderate numbers and are relatively stable from year to year. The pattern seen on the island is instead similar to that of cyclic microtines. We compare Microtus and the Santa Barbara Island deer mice and discuss parallels in the possible causes of the respective cycles.
","language":"English","publisher":"Wiley","doi":"10.2307/3545078","usgsCitation":"Drost, C.A., and Fellers, G.M., 1991, Density cycles in an island population of deer mice, Peromyscus maniculatus: Oikos, v. 60, no. 3, p. 351-364, https://doi.org/10.2307/3545078.","productDescription":"14 p.","startPage":"351","endPage":"364","costCenters":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"links":[{"id":130904,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Santa Barbara Island","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -119.04500728052345,\n 33.488559108576396\n ],\n [\n -119.04869275681853,\n 33.48222723376799\n ],\n [\n -119.04062587302319,\n 33.46503383461739\n ],\n [\n -119.03001702332804,\n 33.4647170389419\n ],\n [\n -119.02658629743173,\n 33.47772454819079\n ],\n [\n -119.02518912209342,\n 33.4917908122782\n ],\n [\n -119.04500728052345,\n 33.488559108576396\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"60","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ab2e4b07f02db66ebc2","contributors":{"authors":[{"text":"Drost, Charles A. 0000-0002-4792-7095 charles_drost@usgs.gov","orcid":"https://orcid.org/0000-0002-4792-7095","contributorId":3151,"corporation":false,"usgs":true,"family":"Drost","given":"Charles","email":"charles_drost@usgs.gov","middleInitial":"A.","affiliations":[{"id":568,"text":"Southwest Biological Science Center","active":true,"usgs":true}],"preferred":true,"id":316674,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fellers, Gary M. 0000-0003-4092-0285 gary_fellers@usgs.gov","orcid":"https://orcid.org/0000-0003-4092-0285","contributorId":3150,"corporation":false,"usgs":true,"family":"Fellers","given":"Gary","email":"gary_fellers@usgs.gov","middleInitial":"M.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":316673,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":1008063,"text":"1008063 - 1991 - Diurnal photosynthesis cycle in CAM and non-CAM seasonal pool aquatic macrophytes","interactions":[],"lastModifiedDate":"2023-12-18T14:53:08.605804","indexId":"1008063","displayToPublicDate":"1991-04-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Diurnal photosynthesis cycle in CAM and non-CAM seasonal pool aquatic macrophytes","docAbstract":"Seasonal pools undergo marked diurnal changes in pH, free carbon dioxide, and oxygen levels. Previous studies showed that Isoetes howellii utilized crassulacean acid metabolism (CAM) photosynthesis as a means of assimilating carbon at night when ambient carbon dioxide levels are high. However, much of the pool flora is not CAM. We hypothesized that coexistence under extreme carbon—limiting conditions would select for other photosynthetic characteristics in these non—CAM species. Quantitative carbon uptake measurements wee made in the field on the CAM Isoetes howellii and the non—CAM Eleocharis acicularis, Downingia bella, and Plagiobothrys undulatus. Despite wide phylogenetic separation, thee species are structurally convergent in that they all produce aquatic stage with an isoetid growth form. They are functionally similar in that none appear to utilize bicarbonate, and all are carbon limited through much of the day, as indicated by a marked midday depression in carbon uptake that last through the afternoon. All four species were capable of carbon fixation at night, although only in Isoetes howellii was this accompanied by an overnight accumulation of acid. It was estimated that dark fixation in I. howelli contributed up to 40% of its total carbon gain under submerged conditions, but was <1% under aerial conditions. The role of dark fixation in the other three, non—CAM, species is unknown. Short—term (1 s) steady—term (1 s) steady—state 14C tracer studies in the laboratory revealed that, under submerged conditions in the light, all species assimilated carbon into the C3 photosynthetic product phosphoglycerate (PGA) and the C4 photosynthetic products of malate, citrate, and aspartate. The proportion of label fixed into C4 organic acids was greatest in E. acicularis. The ratio of RuBP carboxylase/PEP carboxylase was broadly similar in all species, ranging from 8.8 to 11.5. When the pools dried down and the plants became aerial, photosynthetic rates increased and a midday depression such as occurred under submergence was not observed. Carbon fixation in the dark became negligible, and the RuBP carboxylase/PEP carboxylase ratio increased. Seasonal changes in biomass showed I. howellii and E. acicularis dominated the pools early in the season, and the biomass of the other two species increased later when the pools dried. The latter species, D. bella and P. undulatus, also had higher rates of photosynthesis under aerial conditions.
","language":"English","publisher":"Ecological Society of America","doi":"10.2307/2937211","usgsCitation":"Keeley, J.E., and Sandquist, D.R., 1991, Diurnal photosynthesis cycle in CAM and non-CAM seasonal pool aquatic macrophytes: Ecology, v. 72, p. 716-727, https://doi.org/10.2307/2937211.","productDescription":"12 p.","startPage":"716","endPage":"727","numberOfPages":"12","costCenters":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"links":[{"id":130810,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"72","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a6be4b07f02db63d890","contributors":{"authors":[{"text":"Keeley, Jon E. 0000-0002-4564-6521 jon_keeley@usgs.gov","orcid":"https://orcid.org/0000-0002-4564-6521","contributorId":1268,"corporation":false,"usgs":true,"family":"Keeley","given":"Jon","email":"jon_keeley@usgs.gov","middleInitial":"E.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":316669,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sandquist, Darren R.","contributorId":298844,"corporation":false,"usgs":false,"family":"Sandquist","given":"Darren","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":316668,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":5222575,"text":"5222575 - 1991 - Population trends from the American woodcock singing-ground survey, 1970-88","interactions":[],"lastModifiedDate":"2024-11-29T17:29:53.660849","indexId":"5222575","displayToPublicDate":"1991-04-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Population trends from the American woodcock singing-ground survey, 1970-88","docAbstract":"Population trend analysis of American woodcook (Scolopax minor) using data from a singing-ground survey indicates population declines throughout the breeding range of the species between 1970 and 1988. In the eastern United States and Canada, this decline has been quite consistent throughout the period, but in the central portion of the continent the population increased during the 1970's and declined during the early 1980's. Observers differ in their ability to hear woodcock, and we document observer differences in the singing-ground survey data and incorporate them into our analyses. Habitat changes have been suggested as the most likely cause of declines in woodcock populations.
","language":"English","publisher":"Wiley","doi":"10.2307/3809154","usgsCitation":"Sauer, J., and Bortner, J.B., 1991, Population trends from the American woodcock singing-ground survey, 1970-88: Journal of Wildlife Management, v. 55, no. 2, p. 300-312, https://doi.org/10.2307/3809154.","productDescription":"13 p.","startPage":"300","endPage":"312","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":199539,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada, United States","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -96.0967375093654,\n 49.09595677704732\n ],\n [\n -96.0967375093654,\n 35.435945782001156\n ],\n [\n -61.30126610548075,\n 35.435945782001156\n ],\n [\n -61.30126610548075,\n 49.09595677704732\n ],\n [\n -96.0967375093654,\n 49.09595677704732\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"55","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ad6e4b07f02db683db8","contributors":{"authors":[{"text":"Sauer, John R. jrsauer@usgs.gov","contributorId":3737,"corporation":false,"usgs":true,"family":"Sauer","given":"John R.","email":"jrsauer@usgs.gov","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":336553,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bortner, James B.","contributorId":83381,"corporation":false,"usgs":true,"family":"Bortner","given":"James","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":336554,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":5222674,"text":"5222674 - 1991 - Home range and movements of juvenile Puerto Rican parrots","interactions":[],"lastModifiedDate":"2024-11-29T17:52:02.345528","indexId":"5222674","displayToPublicDate":"1991-04-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Home range and movements of juvenile Puerto Rican parrots","docAbstract":"We studied home range and movements of 15 radio-marked, juvenile Puerto Rican parrots (Amazona vittata) fledging from wild nests during summer and fall, 1985-87. When juvenile parrots remained in the nest valley, home ranges during 1986 (x̄ = 32 ± 10 [SE] ha, n = 4) were larger (P = 0.0079) than during 1987 (x̄ = 13 ± 6 ha, n = 5). After radio-marked parrots integrated into adult flocks, home ranges during 1986 (x̄ = 1,075 ± 135 ha, n = 3) were similar (P = 0.10) to 1987 (x̄ = 416 ± 62 ha, n = 2). Juvenile parrots restricted their movements to nest valleys an average of 58 ± 29 days following fledging. After joining adult flocks, juvenile parrots routinely flew between the east and west slopes of the Luquillo Mountains but did not exhibit a seasonal pattern of movement. We recommend that captive-raised, juvenile parrots used in release programs be ≥5 months old to ensure they are mature enough to integrate into wild flocks.
","language":"English","publisher":"Wiley","doi":"10.2307/3809157","usgsCitation":"Lindsey, G.D., Arendt, W.J., Kalina, J., and Pendleton, G.W., 1991, Home range and movements of juvenile Puerto Rican parrots: Journal of Wildlife Management, v. 55, no. 2, p. 318-322, https://doi.org/10.2307/3809157.","productDescription":"5 p.","startPage":"318","endPage":"322","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":194190,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Luquillo Mountains, Puerto Rico","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -65.8449580355314,\n 18.386269369467428\n ],\n [\n -65.8449580355314,\n 18.255457908349925\n ],\n [\n -65.70184549884009,\n 18.255457908349925\n ],\n [\n -65.70184549884009,\n 18.386269369467428\n ],\n [\n -65.8449580355314,\n 18.386269369467428\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"55","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a54e4b07f02db62bf10","contributors":{"authors":[{"text":"Lindsey, Gerald D.","contributorId":102534,"corporation":false,"usgs":true,"family":"Lindsey","given":"Gerald","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":336813,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Arendt, Wayne J.","contributorId":176182,"corporation":false,"usgs":false,"family":"Arendt","given":"Wayne","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":336812,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kalina, Jan","contributorId":63898,"corporation":false,"usgs":true,"family":"Kalina","given":"Jan","email":"","affiliations":[],"preferred":false,"id":336811,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Pendleton, Grey W.","contributorId":191446,"corporation":false,"usgs":false,"family":"Pendleton","given":"Grey","email":"","middleInitial":"W.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":336810,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":5222572,"text":"5222572 - 1991 - Effect of hunting on annual survival of grey ducks in New Zealand","interactions":[],"lastModifiedDate":"2024-12-02T16:51:37.034425","indexId":"5222572","displayToPublicDate":"1991-04-01T00:00:00","publicationYear":"1991","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Effect of hunting on annual survival of grey ducks in New Zealand","docAbstract":"We used band recovery data from grey ducks (Anas superciliosa) banded in New Zealand between 1957 and 1974 to test 2 null hypotheses: (1) hunting mortality is completely additive to natural sources of mortality, and (2) hunting mortality is completely compensated by changes in natural mortality. We modeled annual survival as a function of survival in the absence of hunting and the probability of death from hunting. The complete compensation hypothesis was rejected, but we were unable to reject the completely additive hypothesis. There was no evidence of sex- or age-specificity for the relationship between kill rate and annual survival rate. We used simulated data to evaluate model performance. Parameter estimates were unbiased despite the inclusion of estimates that lay outside the bounds of the parameter space, although model-based variance estimates were consistently less than empirical variances. Our results imply that harvest-restrictions may be useful in effecting change in annual survival rates of grey ducks.
","language":"English","publisher":"Wiley","doi":"10.2307/3809148","usgsCitation":"Barker, R.J., Hines, J.E., and Nichols, J., 1991, Effect of hunting on annual survival of grey ducks in New Zealand: Journal of Wildlife Management, v. 55, no. 2, p. 260-265, https://doi.org/10.2307/3809148.","productDescription":"6 p.","startPage":"260","endPage":"265","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":197445,"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":"55","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a4be4b07f02db6254e5","contributors":{"authors":[{"text":"Barker, Richard J.","contributorId":206174,"corporation":false,"usgs":false,"family":"Barker","given":"Richard","email":"","middleInitial":"J.","affiliations":[{"id":37272,"text":"University of Otago; Dunedin, New Zealand","active":true,"usgs":false}],"preferred":false,"id":336542,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hines, James E. 0000-0001-5478-7230 jhines@usgs.gov","orcid":"https://orcid.org/0000-0001-5478-7230","contributorId":146530,"corporation":false,"usgs":true,"family":"Hines","given":"James","email":"jhines@usgs.gov","middleInitial":"E.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":336543,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nichols, James D. jnichols@usgs.gov","contributorId":139082,"corporation":false,"usgs":true,"family":"Nichols","given":"James D.","email":"jnichols@usgs.gov","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":336541,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70171291,"text":"70171291 - 1991 - Construction effects on sediment for two basins in Puerto Rico","interactions":[],"lastModifiedDate":"2016-06-02T09:25:43","indexId":"70171291","displayToPublicDate":"1991-03-22T10:30:00","publicationYear":"1991","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Construction effects on sediment for two basins in Puerto Rico","largerWorkType":{"id":24,"text":"Conference Paper"},"largerWorkTitle":"Proceedings of the Fifth Federal Interagency Sedimentation Conference","largerWorkSubtype":{"id":19,"text":"Conference Paper"},"conferenceTitle":"Fifth Federal Interagency Sedimentation Conference","conferenceDate":"March 18-21, 1991","conferenceLocation":"Las Vegas, Nevada","language":"English","publisher":"Federal Energy Regulatory Commission","usgsCitation":"Gellis, A., 1991, Construction effects on sediment for two basins in Puerto Rico, in Proceedings of the Fifth Federal Interagency Sedimentation Conference, v. 1, Las Vegas, Nevada, March 18-21, 1991, p. 4-72-4-78.","productDescription":"7 p.","startPage":"4-72","endPage":"4-78","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":156,"text":"Caribbean Water Science Center","active":true,"usgs":true}],"links":[{"id":321740,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57481e2de4b07e28b664db92","contributors":{"editors":[{"text":"Fan, Shou-Shan","contributorId":169968,"corporation":false,"usgs":false,"family":"Fan","given":"Shou-Shan","email":"","affiliations":[],"preferred":false,"id":631642,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Kuo, Y.-H.","contributorId":104716,"corporation":false,"usgs":true,"family":"Kuo","given":"Y.-H.","email":"","affiliations":[],"preferred":false,"id":631643,"contributorType":{"id":2,"text":"Editors"},"rank":2}],"authors":[{"text":"Gellis, Allen C. 0000-0002-3449-2889 agellis@usgs.gov","orcid":"https://orcid.org/0000-0002-3449-2889","contributorId":1709,"corporation":false,"usgs":true,"family":"Gellis","given":"Allen C.","email":"agellis@usgs.gov","affiliations":[{"id":375,"text":"Maryland, Delaware, and the District of Columbia Water Science Center","active":false,"usgs":true}],"preferred":false,"id":630456,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ]}