{"pageNumber":"766","pageRowStart":"19125","pageSize":"25","recordCount":40778,"records":[{"id":70035892,"text":"70035892 - 2011 - Characterization of the Cretaceous aquifer structure of the Meskala region of the Essaouira Basin, Morocco","interactions":[],"lastModifiedDate":"2021-02-08T20:33:14.302762","indexId":"70035892","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2147,"text":"Journal of African Earth Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Characterization of the Cretaceous aquifer structure of the Meskala region of the Essaouira Basin, Morocco","docAbstract":"<p><span>The aquifer of early Cretaceous age in the Meskala region of the Essaouira Basin is defined by interpretation of geological drilling data of oil and hydrogeological wells, field measurement and analysis of in situ fracture orientations, and the application of a morphostructural method to identify lineaments. These analyzes are used to develop a stratigraphic–structural model of the aquifer delimited by fault zones of two principal orientations: NNE and WNW. These fault zones define fault blocks that range in area from 4 to 150</span><span>&nbsp;</span><span>km</span><sup>2</sup><span>. These blocks correspond either to elevated zones (horsts) or depressed zones (grabens). This structural setting with faults blocks of Meskala region is in accordance with the structure of the whole Essaouira Basin. Fault zones disrupt the continuity of the aquifer throughout the study area, create recharge and discharge zones, and create dip to the units from approximately 10° to near vertical in various orientations. Fracture measurements and morphometric-lineament analyzes help to identify unmapped faults, and represent features important to groundwater hydraulics and water quality within fault blocks. The above geologic features will enable a better understanding of the behaviour and hydro-geo-chemical and hydrodynamics of groundwater in the Meskala aquifer.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.jafrearsci.2010.12.003","issn":"1464343X","usgsCitation":"Hanich, L., Zouhri, L., and Dinger, J., 2011, Characterization of the Cretaceous aquifer structure of the Meskala region of the Essaouira Basin, Morocco: Journal of African Earth Sciences, v. 59, no. 2-3, p. 313-322, https://doi.org/10.1016/j.jafrearsci.2010.12.003.","productDescription":"10 p.","startPage":"313","endPage":"322","costCenters":[],"links":[{"id":244153,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216290,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jafrearsci.2010.12.003"}],"country":"Morocco","otherGeospatial":"Essaouira Basin","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -8.712158203125,\n              31.306715155075167\n            ],\n            [\n              -6.6796875,\n              31.306715155075167\n            ],\n            [\n              -6.6796875,\n              32.731840896865684\n            ],\n            [\n              -8.712158203125,\n              32.731840896865684\n            ],\n            [\n              -8.712158203125,\n              31.306715155075167\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"59","issue":"2-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f4e2e4b0c8380cd4bf97","contributors":{"authors":[{"text":"Hanich, L.","contributorId":63643,"corporation":false,"usgs":true,"family":"Hanich","given":"L.","email":"","affiliations":[],"preferred":false,"id":452968,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Zouhri, L.","contributorId":58117,"corporation":false,"usgs":true,"family":"Zouhri","given":"L.","email":"","affiliations":[],"preferred":false,"id":452967,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dinger, J.","contributorId":69788,"corporation":false,"usgs":true,"family":"Dinger","given":"J.","email":"","affiliations":[],"preferred":false,"id":452969,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70035897,"text":"70035897 - 2011 - An analysis of modern pollen rain from the Maya lowlands of northern Belize","interactions":[],"lastModifiedDate":"2021-02-08T20:04:26.516947","indexId":"70035897","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3275,"text":"Review of Palaeobotany and Palynology","active":true,"publicationSubtype":{"id":10}},"title":"An analysis of modern pollen rain from the Maya lowlands of northern Belize","docAbstract":"<p><span>In the lowland Maya area, pollen records provide important insights into the impact of past human populations and climate change on tropical ecosystems. Despite a long history of regional paleoecological research, few studies have characterized the palynological signatures of lowland ecosystems, a fact which lowers confidence in ecological inferences made from palynological data. We sought to verify whether we could use pollen spectra to reliably distinguish modern ecosystem types in the Maya lowlands of Central America. We collected 23 soil and sediment samples from eight ecosystem types, including upland, riparian, secondary, and swamp (</span><i>bajo</i><span>) forests; pine savanna; and three distinct wetland communities. We analyzed pollen spectra with non-metric multidimensional scaling (NMDS), and found significant compositional differences in ecosystem types' pollen spectra. Forested sites had spectra dominated by Moraceae/Urticaceae pollen, while non-forested sites had significant portions of Poaceae, Asteraceae, and Amaranthaceae pollen. Upland,&nbsp;</span><i>bajo</i><span>, and riparian forest differed in representation of Cyperaceae,&nbsp;</span><i>Bactris</i><span>-type, and Combretaceae/Melastomataceae pollen. High percentages of pine (</span><i>Pinus</i><span>), oak (</span><i>Quercus</i><span>), and the presence of&nbsp;</span><i>Byrsonima</i><span>&nbsp;characterized pine savanna. Despite its limited sample size, this study provides one of the first statistical analyses of modern pollen rain in the Maya lowlands. Our results show that pollen assemblages can accurately reflect differences between ecosystem types, which may help refine interpretations of pollen records from the Maya area.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.revpalbo.2010.11.010","issn":"00346667","usgsCitation":"Bhattacharya, T., Beach, T., and Wahl, D.B., 2011, An analysis of modern pollen rain from the Maya lowlands of northern Belize: Review of Palaeobotany and Palynology, v. 164, no. 1-2, p. 109-120, https://doi.org/10.1016/j.revpalbo.2010.11.010.","productDescription":"12 p.","startPage":"109","endPage":"120","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":244223,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216359,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.revpalbo.2010.11.010"}],"country":"Belize","otherGeospatial":"Maya lowlands","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-89.14308,17.80832],[-89.15091,17.95547],[-89.02986,18.00151],[-88.84834,17.8832],[-88.49012,18.48683],[-88.30003,18.49998],[-88.29634,18.35327],[-88.10681,18.34867],[-88.12348,18.07667],[-88.28535,17.64414],[-88.19787,17.48948],[-88.30264,17.13169],[-88.23952,17.03607],[-88.35543,16.53077],[-88.55182,16.26547],[-88.73243,16.23363],[-88.93061,15.88727],[-89.22912,15.88694],[-89.15081,17.01558],[-89.14308,17.80832]]]},\"properties\":{\"name\":\"Belize\"}}]}","volume":"164","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e9f0e4b0c8380cd48540","contributors":{"authors":[{"text":"Bhattacharya, T.","contributorId":96920,"corporation":false,"usgs":true,"family":"Bhattacharya","given":"T.","email":"","affiliations":[],"preferred":false,"id":452998,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Beach, T.","contributorId":39607,"corporation":false,"usgs":true,"family":"Beach","given":"T.","email":"","affiliations":[],"preferred":false,"id":452997,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wahl, David B. 0000-0002-0451-3554 dwahl@usgs.gov","orcid":"https://orcid.org/0000-0002-0451-3554","contributorId":3433,"corporation":false,"usgs":true,"family":"Wahl","given":"David","email":"dwahl@usgs.gov","middleInitial":"B.","affiliations":[{"id":24693,"text":"Climate Research and Development","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":452996,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033819,"text":"70033819 - 2011 - The ShakeOut earthquake source and ground motion simulations","interactions":[],"lastModifiedDate":"2012-12-14T13:49:58","indexId":"70033819","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1436,"text":"Earthquake Spectra","active":true,"publicationSubtype":{"id":10}},"title":"The ShakeOut earthquake source and ground motion simulations","docAbstract":"The ShakeOut Scenario is premised upon the detailed description of a hypothetical <i>M<sub>w</sub></i> 7.8 earthquake on the southern San Andreas Fault and the associated simulated ground motions. The main features of the scenario, such as its endpoints, magnitude, and gross slip distribution, were defined through expert opinion and incorporated information from many previous studies. Slip at smaller length scales, rupture speed, and rise time were constrained using empirical relationships and experience gained from previous strong-motion modeling. Using this rupture description and a 3-D model of the crust, broadband ground motions were computed over a large region of Southern California. The largest simulated peak ground acceleration (PGA) and peak ground velocity (PGV) generally range from 0.5 to 1.0 g and 100 to 250 cm/s, respectively, with the waveforms exhibiting strong directivity and basin effects. Use of a slip-predictable model results in a high static stress drop event and produces ground motions somewhat higher than median level predictions from NGA ground motion prediction equations (GMPEs).","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Earthquake Spectra","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"EERI","publisherLocation":"Oakland, CA","doi":"10.1193/1.3570677","issn":"87552930","usgsCitation":"Graves, R., Houston, D.B., and Hudnut, K., 2011, The ShakeOut earthquake source and ground motion simulations: Earthquake Spectra, v. 27, no. 2, p. 273-291, https://doi.org/10.1193/1.3570677.","productDescription":"19 p.","startPage":"273","endPage":"291","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":214114,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1193/1.3570677"},{"id":241806,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"2","noUsgsAuthors":false,"publicationDate":"2011-05-01","publicationStatus":"PW","scienceBaseUri":"505ba8e7e4b08c986b321f1c","contributors":{"authors":[{"text":"Graves, R.W. 0000-0001-9758-453X","orcid":"https://orcid.org/0000-0001-9758-453X","contributorId":77691,"corporation":false,"usgs":true,"family":"Graves","given":"R.W.","affiliations":[],"preferred":false,"id":442693,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Houston, Douglas B.","contributorId":25326,"corporation":false,"usgs":false,"family":"Houston","given":"Douglas","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":442692,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hudnut, K.W.","contributorId":25179,"corporation":false,"usgs":true,"family":"Hudnut","given":"K.W.","email":"","affiliations":[],"preferred":false,"id":442691,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70035901,"text":"70035901 - 2011 - An acarologic survey and Amblyomma americanum distribution map with implications for tularemia risk in Missouri","interactions":[],"lastModifiedDate":"2021-02-08T19:15:25.164963","indexId":"70035901","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":733,"text":"American Journal of Tropical Medicine and Hygiene","active":true,"publicationSubtype":{"id":10}},"title":"An acarologic survey and Amblyomma americanum distribution map with implications for tularemia risk in Missouri","docAbstract":"<p><span>In the United States, tickborne diseases occur focally. Missouri represents a major focus of several tickborne diseases that includes spotted fever rickettsiosis, tularemia, and ehrlichiosis. Our study sought to determine the potential risk of human exposure to human-biting vector ticks in this area. We collected ticks in 79 sites in southern Missouri during June 7–10, 2009, which yielded 1,047 adult and 3,585 nymphal&nbsp;</span><i>Amblyomma americanum</i><span>, 5 adult&nbsp;</span><i>Amblyomma maculatum</i><span>, 19 adult&nbsp;</span><i>Dermacentor variabilis</i><span>, and 5 nymphal&nbsp;</span><i>Ixodes brunneus</i><span>. Logistic regression analysis showed that areas posing an elevated risk of exposure to&nbsp;</span><i>A. americanum</i><span>nymphs or adults were more likely to be classified as forested than grassland, and the probability of being classified as elevated risk increased with increasing relative humidity during the month of June (30-year average). Overall accuracy of each of the two models was greater than 70% and showed that 20% and 30% of the state were classified as elevated risk for human exposure to nymphs and adults, respectively. We also found a significant positive association between heightened acarologic risk and counties reporting tularemia cases. Our study provides an updated distribution map for&nbsp;</span><i>A. americanum</i><span>&nbsp;in Missouri and suggests a wide-spread risk of human exposure to&nbsp;</span><i>A. americanum</i><span>&nbsp;and their associated pathogens in this region.</span></p>","language":"English","publisher":"The American Journal of Tropical Medicine and Hygiene","doi":"10.4269/ajtmh.2011.10-0593","issn":"00029637","usgsCitation":"Brown, H., Yates, K., Dietrich, G., MacMillan, K., Graham, C., Reese, S., Helterbrand, W., Nicholson, W., Blount, K., Mead, P., Patrick, S., and Eisen, R., 2011, An acarologic survey and Amblyomma americanum distribution map with implications for tularemia risk in Missouri: American Journal of Tropical Medicine and Hygiene, v. 84, no. 3, p. 411-419, https://doi.org/10.4269/ajtmh.2011.10-0593.","productDescription":"9 p.","startPage":"411","endPage":"419","costCenters":[],"links":[{"id":475121,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index 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,{"id":70035919,"text":"70035919 - 2011 - Predicting breeding bird occurrence by stand- and microhabitat-scale features in even-aged stands in the Central Appalachians","interactions":[],"lastModifiedDate":"2021-02-08T18:34:32.277423","indexId":"70035919","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1687,"text":"Forest Ecology and Management","active":true,"publicationSubtype":{"id":10}},"title":"Predicting breeding bird occurrence by stand- and microhabitat-scale features in even-aged stands in the Central Appalachians","docAbstract":"<p><span>Spatial scale is an important consideration when managing forest wildlife habitat, and models can be used to improve our understanding of these habitats at relevant scales. Our objectives were to determine whether stand- or microhabitat-scale variables better predicted bird metrics (diversity, species presence, and abundance) and to examine breeding bird response to clearcut size and age in a highly forested landscape. In 2004–2007, vegetation data were collected from 62 even-aged stands that were 3.6–34.6</span><span>&nbsp;</span><span>ha in size and harvested in 1963–1990 on the Monongahela National Forest, WV, USA. In 2005–2007, we also surveyed birds at vegetation plots. We used classification and regression trees to model breeding bird habitat use with a suite of stand and microhabitat variables. Among stand variables, elevation, stand age, and stand size were most commonly retained as important variables in guild and species models. Among microhabitat variables, medium-sized tree density and tree species diversity most commonly predicted bird presence or abundance. Early successional and generalist bird presence, abundance, and diversity were better predicted by microhabitat variables than stand variables. Thus, more intensive field sampling may be required to predict habitat use for these species, and management may be needed at a finer scale. Conversely, stand-level variables had greater utility in predicting late-successional species occurrence and abundance; thus management decisions and modeling at this scale may be suitable in areas with a uniform landscape, such as our study area. Our study suggests that late-successional breeding bird diversity can be maximized long-term by including harvests &gt;10</span><span>&nbsp;</span><span>ha in size into our study area and by increasing tree diversity. Some harvesting will need to be incorporated regularly, because after 15 years, the study stands did not provide habitat for most early successional breeding specialists.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.foreco.2010.10.020","issn":"03781127","usgsCitation":"McDermott, M., Wood, P.B., Miller, G., and Simpson, B., 2011, Predicting breeding bird occurrence by stand- and microhabitat-scale features in even-aged stands in the Central Appalachians: Forest Ecology and Management, v. 261, no. 3, p. 373-380, https://doi.org/10.1016/j.foreco.2010.10.020.","productDescription":"8 p.","startPage":"373","endPage":"380","costCenters":[],"links":[{"id":244089,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216231,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.foreco.2010.10.020"}],"volume":"261","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a81aae4b0c8380cd7b66a","contributors":{"authors":[{"text":"McDermott, M.E.","contributorId":42793,"corporation":false,"usgs":true,"family":"McDermott","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":453136,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wood, Petra B. 0000-0002-8575-1705 pbwood@usgs.gov","orcid":"https://orcid.org/0000-0002-8575-1705","contributorId":199090,"corporation":false,"usgs":true,"family":"Wood","given":"Petra","email":"pbwood@usgs.gov","middleInitial":"B.","affiliations":[{"id":199,"text":"Coop Res Unit Leetown","active":true,"usgs":true}],"preferred":true,"id":453139,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Miller, G.W.","contributorId":92377,"corporation":false,"usgs":true,"family":"Miller","given":"G.W.","email":"","affiliations":[],"preferred":false,"id":453138,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Simpson, B.T.","contributorId":53193,"corporation":false,"usgs":true,"family":"Simpson","given":"B.T.","email":"","affiliations":[],"preferred":false,"id":453137,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70034623,"text":"70034623 - 2011 - Apogean-perigean signals encoded in tidal flats at the fluvio-estuarine transition of Glacier Creek, Turnagain Arm, Alaska; implications for ancient tidal rhythmites","interactions":[],"lastModifiedDate":"2021-04-14T20:52:14.238981","indexId":"70034623","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3369,"text":"Sedimentology","active":true,"publicationSubtype":{"id":10}},"title":"Apogean-perigean signals encoded in tidal flats at the fluvio-estuarine transition of Glacier Creek, Turnagain Arm, Alaska; implications for ancient tidal rhythmites","docAbstract":"<p><span>Turnagain Arm is a macrotidal fjord‐style estuary. Glacier Creek is a small, glacially fed stream which enters the estuary tangentially near Girdwood, Alaska. Trenches and daily sedimentation measurements were made in a mudflat along the fluvio–estuarine transition of Glacier Creek during several summers since 2003. Each year, the flats appear to erode during the winter and then accrete vertically in the spring and summer. In each of the years studied, tidal laminae in vertically thickening and thinning laminae bundles were deposited by twice daily tides in neap–spring tidal cycles. In 2004, bundles of thickening and thinning laminae couplets were noted in trenches cut into the flats. Five laminae bundles alternated between thicker and thinner bundles, corresponding to the perigean (high spring) and apogean (low spring) tides. Well‐preserved apogean–perigean cycles have rarely been documented in modern tidal flat sediments. At this location, vertical accretion of tidal rhythmites with well‐developed neap–spring cyclicity is possible because of the near‐complete removal of the flat from the previous year, which creates accommodation space for vertical accretion without significant reworking. Macrotidal conditions, no reworking by infaunal invertebrates, protection from the main tidal channel by a gravel bar and protection from storm waves and fluvial erosion by a recess in the sedge marsh that surrounds the flats all aid in preservation of rhythmites during aggradation. The position of the flats relative to tidal range allows for accumulation of complete spring cycles and incomplete neap cycles. In the summer of 2004, apogee and perigee were closely aligned with the new and full moons, resulting in successive strong perigee and apogee tides which probably aided in the accumulation of successive thick–thin spring cycles encoding the apogean and perigean tidal cycle. The apogean–perigean signal was not observed in subsequent years.</span></p>","language":"English","publisher":"Wiley","doi":"10.1111/j.1365-3091.2010.01220.x","issn":"00370746","usgsCitation":"Greb, S., Archer, A., and Deboer, D., 2011, Apogean-perigean signals encoded in tidal flats at the fluvio-estuarine transition of Glacier Creek, Turnagain Arm, Alaska; implications for ancient tidal rhythmites: Sedimentology, v. 58, no. 6, p. 1434-1452, https://doi.org/10.1111/j.1365-3091.2010.01220.x.","productDescription":"19 p.","startPage":"1434","endPage":"1452","costCenters":[],"links":[{"id":243377,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215565,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-3091.2010.01220.x"}],"country":"United States","state":"Alaska","otherGeospatial":"Glacier Creek, Turnagain Arm","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -152.29248046875,\n              60.09771842541544\n            ],\n            [\n              -147.94189453125,\n              60.09771842541544\n            ],\n            [\n              -147.94189453125,\n              62.155240711732425\n            ],\n            [\n              -152.29248046875,\n              62.155240711732425\n            ],\n            [\n              -152.29248046875,\n              60.09771842541544\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"58","issue":"6","noUsgsAuthors":false,"publicationDate":"2011-02-15","publicationStatus":"PW","scienceBaseUri":"5059ec72e4b0c8380cd49296","contributors":{"authors":[{"text":"Greb, S.F.","contributorId":48294,"corporation":false,"usgs":true,"family":"Greb","given":"S.F.","email":"","affiliations":[],"preferred":false,"id":446733,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Archer, A.W.","contributorId":8620,"corporation":false,"usgs":true,"family":"Archer","given":"A.W.","affiliations":[],"preferred":false,"id":446731,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Deboer, D.G.","contributorId":29658,"corporation":false,"usgs":true,"family":"Deboer","given":"D.G.","email":"","affiliations":[],"preferred":false,"id":446732,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70032231,"text":"70032231 - 2011 - Sexing young snowy owls","interactions":[],"lastModifiedDate":"2018-08-20T18:57:09","indexId":"70032231","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2442,"text":"Journal of Raptor Research","active":true,"publicationSubtype":{"id":10}},"title":"Sexing young snowy owls","docAbstract":"We predicted sex of 140 Snowy Owl (Bubo scandiacus) nestlings out of 34 nests at our Barrow, Alaska, study area to develop a technique for sexing these owls in the field. We primarily sexed young, flightless owls (3844 d old) by quantifying plumage markings on the remiges and tail, predicting sex, and collecting blood samples to test our field predictions using molecular sexing techniques. We categorized and quantified three different plumage markings: two types of bars (defined as markings that touch the rachis) and spots (defined as markings that do not touch the rachis). We predicted sex in the field assuming that males had more spots than bars and females more bars than spots on the remiges and rectrices. Molecular data indicated that we correctly sexed 100% of the nestlings. We modeled the data using random forests and classification trees. Both models indicated that the number and type of markings on the secondary feathers were the most important in classifying nestling sex. The statistical models verified our initial qualitative prediction that males have more spots than bars and females more bars than spots on flight feathers P6P10 for both wings and tail feathers T1 and T2. This study provides researchers with an easily replicable and highly accurate method for sexing young Snowy Owls in the field, which should aid further studies of sex-ratios and sex-related variation in behavior and growth of this circumpolar owl species. ?? 2011 The Raptor Research Foundation, Inc.","language":"English","publisher":"The Raptor Research Foundation, Inc.","doi":"10.3356/JRR-11-02.1","usgsCitation":"Seidensticker, M.T., Holt, D.W., Detienne, J., Talbot, S.L., and Gray, K., 2011, Sexing young snowy owls: Journal of Raptor Research, v. 45, no. 4, p. 281-289, https://doi.org/10.3356/JRR-11-02.1.","productDescription":"9 p.","startPage":"281","endPage":"289","costCenters":[],"links":[{"id":487853,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3356/jrr-11-02.1","text":"Publisher Index Page"},{"id":242671,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8db7e4b08c986b318506","contributors":{"authors":[{"text":"Seidensticker, Mathew T.","contributorId":99792,"corporation":false,"usgs":false,"family":"Seidensticker","given":"Mathew","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":435156,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Holt, Denver W.","contributorId":70609,"corporation":false,"usgs":false,"family":"Holt","given":"Denver","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":435155,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Detienne, Jennifer","contributorId":35968,"corporation":false,"usgs":false,"family":"Detienne","given":"Jennifer","email":"","affiliations":[],"preferred":false,"id":435154,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Talbot, Sandra L. 0000-0002-3312-7214 stalbot@usgs.gov","orcid":"https://orcid.org/0000-0002-3312-7214","contributorId":140512,"corporation":false,"usgs":true,"family":"Talbot","given":"Sandra","email":"stalbot@usgs.gov","middleInitial":"L.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":435153,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Gray, Kathy","contributorId":62949,"corporation":false,"usgs":false,"family":"Gray","given":"Kathy","email":"","affiliations":[],"preferred":false,"id":435152,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70032232,"text":"70032232 - 2011 - Incorporating biodiversity into rangeland health: Plant species richness and diversity in great plains grasslands","interactions":[],"lastModifiedDate":"2017-09-06T16:44:04","indexId":"70032232","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3228,"text":"Rangeland Ecology and Management","onlineIssn":"1551-5028","printIssn":"1550-7424","active":true,"publicationSubtype":{"id":10}},"title":"Incorporating biodiversity into rangeland health: Plant species richness and diversity in great plains grasslands","docAbstract":"<p><span>Indicators of rangeland health generally do not include a measure of biodiversity. Increasing attention to maintaining biodiversity in rangelands suggests that this omission should be reconsidered, and plant species richness and diversity are two metrics that may be useful and appropriate. Ideally, their response to a variety of anthropogenic and natural drivers in the ecosystem of interest would be clearly understood, thereby providing a means to diagnose the cause of decline in an ecosystem. Conceptual ecological models based on ecological principles and hypotheses provide a framework for this understanding, but these models must be supported by empirical evidence if they are to be used for decision making. To that end, we synthesize results from published studies regarding the responses of plant species richness and diversity to drivers that are of management concern in Great Plains grasslands, one of North America's most imperiled ecosystems. In the published literature, moderate grazing generally has a positive effect on these metrics in tallgrass prairie and a neutral to negative effect in shortgrass prairie. The largest published effects on richness and diversity were caused by moderate grazing in tallgrass prairies and nitrogen fertilization in shortgrass prairies. Although weather is often cited as the reason for considerable annual fluctuations in richness and diversity, little information about the responses of these metrics to weather is available. Responses of the two metrics often diverged, reflecting differences in their sensitivity to different types of changes in the plant community. Although sufficient information has not yet been published for these metrics to meet all the criteria of a good indicator in Great Plains Grasslands, augmenting current methods of evaluating rangeland health with a measure of plant species richness would reduce these shortcomings and provide information critical to managing for biodiversity.</span></p>","language":"English","publisher":"Elsevier","doi":"10.2111/REM-D-10-00136.1","issn":"15507424","usgsCitation":"Symstad, A., and Jonas, J.L., 2011, Incorporating biodiversity into rangeland health: Plant species richness and diversity in great plains grasslands: Rangeland Ecology and Management, v. 64, no. 6, p. 555-572, https://doi.org/10.2111/REM-D-10-00136.1.","productDescription":"18 p.","startPage":"555","endPage":"572","numberOfPages":"18","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":487854,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://hdl.handle.net/10150/642903","text":"External Repository"},{"id":242672,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214912,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2111/REM-D-10-00136.1"}],"volume":"64","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a39e6e4b0c8380cd61a95","contributors":{"authors":[{"text":"Symstad, Amy J. 0000-0003-4231-2873 asymstad@usgs.gov","orcid":"https://orcid.org/0000-0003-4231-2873","contributorId":2611,"corporation":false,"usgs":true,"family":"Symstad","given":"Amy J.","email":"asymstad@usgs.gov","affiliations":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":435157,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jonas, Jayne L.","contributorId":22680,"corporation":false,"usgs":true,"family":"Jonas","given":"Jayne","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":435158,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70034098,"text":"70034098 - 2011 - Hierarchical modeling of an invasive spread: The eurasian collared-dove streptopelia decaocto in the United States","interactions":[],"lastModifiedDate":"2012-03-12T17:21:44","indexId":"70034098","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1450,"text":"Ecological Applications","active":true,"publicationSubtype":{"id":10}},"title":"Hierarchical modeling of an invasive spread: The eurasian collared-dove streptopelia decaocto in the United States","docAbstract":"Invasive species are regularly claimed as the second threat to biodiversity. To apply a relevant response to the potential consequences associated with invasions (e.g., emphasize management efforts to prevent new colonization or to eradicate the species in places where it has already settled), it is essential to understand invasion mechanisms and dynamics. Quantifying and understanding what influences rates of spatial spread is a key research area for invasion theory. In this paper, we develop a model to account for occupancy dynamics of an invasive species. Our model extends existing models to accommodate several elements of invasive processes; we chose the framework of hierarchical modeling to assess site occupancy status during an invasion. First, we explicitly accounted for spatial structure and how distance among sites and position relative to one another affect the invasion spread. In particular, we accounted for the possibility of directional propagation and provided a way of estimating the direction of this possible spread. Second, we considered the influence of local density on site occupancy. Third, we decided to split the colonization process into two subprocesses, initial colonization and recolonization, which may be ground-breaking because these subprocesses may exhibit different relationships with environmental variations (such as density variation) or colonization history (e.g., initial colonization might facilitate further colonization events). Finally, our model incorporates imperfection in detection, which might be a source of substantial bias in estimating population parameters. We focused on the case of the Eurasian Collared-Dove (Streptopelia decaocto) and its invasion of the United States since its introduction in the early 1980s, using data from the North American BBS (Breeding Bird Survey). The Eurasian Collared-Dove is one of the most successful invasive species, at least among terrestrial vertebrates. Our model provided estimation of the spread direction consistent with empirical observations. Site persistence probability exhibits a quadratic response to density. We also succeeded at detecting differences in the relationship between density and initial colonization vs. recolonization probabilities. We provide a map of sites that may be colonized in the future as an example of possible practical application of our work. ?? 2011 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/09-1877.1","issn":"10510761","usgsCitation":"Bled, F., Royle, J., and Cam, E., 2011, Hierarchical modeling of an invasive spread: The eurasian collared-dove streptopelia decaocto in the United States: Ecological Applications, v. 21, no. 1, p. 290-302, https://doi.org/10.1890/09-1877.1.","startPage":"290","endPage":"302","numberOfPages":"13","costCenters":[],"links":[{"id":216840,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/09-1877.1"},{"id":244736,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"21","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a309ce4b0c8380cd5d7bc","contributors":{"authors":[{"text":"Bled, F.","contributorId":41676,"corporation":false,"usgs":true,"family":"Bled","given":"F.","affiliations":[],"preferred":false,"id":444067,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Royle, J. Andrew 0000-0003-3135-2167","orcid":"https://orcid.org/0000-0003-3135-2167","contributorId":96221,"corporation":false,"usgs":true,"family":"Royle","given":"J. Andrew","affiliations":[],"preferred":false,"id":444068,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cam, E.","contributorId":12952,"corporation":false,"usgs":true,"family":"Cam","given":"E.","affiliations":[],"preferred":false,"id":444066,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70032264,"text":"70032264 - 2011 - Evidence for the contemporary magmatic system beneath Long Valley Caldera from local earthquake tomography and receiver function analysis","interactions":[],"lastModifiedDate":"2012-12-07T13:09:19","indexId":"70032264","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","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":"Evidence for the contemporary magmatic system beneath Long Valley Caldera from local earthquake tomography and receiver function analysis","docAbstract":"We present a new <i>P</i> wave and <i>S</i> wave velocity model for the upper crust beneath Long Valley Caldera obtained using local earthquake tomography and receiver function analysis. We computed the tomographic model using both a graded inversion scheme and a traditional approach. We complement the tomographic I/<sub><i>P</i></sub> model with a teleseismic receiver function model based on data from broadband seismic stations (MLAC and MKV) located on the SE and SW margins of the resurgent dome inside the caldera. The inversions resolve (1) a shallow, high-velocity <i>P</i> wave anomaly associated with the structural uplift of a resurgent dome; (2) an elongated, WNW striking low-velocity anomaly (8%–10 % reduction in I/<sub><i>P</i></sub>) at a depth of 6 km (4 km below mean sea level) beneath the southern section of the resurgent dome; and (3) a broad, low-velocity volume (&ndash;5% reduction in I/<sub><i>P</i></sub> and as much as 40% reduction in I/<sub><i>S</i></sub>) in the depth interval 8–14 km (6–12 km below mean sea level) beneath the central section of the caldera. The two low-velocity volumes partially overlap the geodetically inferred inflation sources that drove uplift of the resurgent dome associated with caldera unrest between 1980 and 2000, and they likely reflect the ascent path for magma or magmatic fluids into the upper crust beneath the caldera.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research B: Solid Earth","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Geophysical Union","publisherLocation":"Washington, D.C.","doi":"10.1029/2011JB008471","issn":"01480227","usgsCitation":"Seccia, D., Chiarabba, C., De Gori, P., Bianchi, I., and Hill, D., 2011, Evidence for the contemporary magmatic system beneath Long Valley Caldera from local earthquake tomography and receiver function analysis: Journal of Geophysical Research B: Solid Earth, v. 116, no. 12, 22 p.; B12314, https://doi.org/10.1029/2011JB008471.","productDescription":"22 p.; B12314","costCenters":[{"id":367,"text":"Long Valley Observatory","active":false,"usgs":true}],"links":[{"id":487055,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2011jb008471","text":"Publisher Index Page"},{"id":214914,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2011JB008471"},{"id":242674,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Long Valley","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -119.3236,36.0389 ], [ -119.3236,38.1445 ], [ -117.965,38.1445 ], [ -117.965,36.0389 ], [ -119.3236,36.0389 ] ] ] } } ] }","volume":"116","issue":"12","noUsgsAuthors":false,"publicationDate":"2011-12-23","publicationStatus":"PW","scienceBaseUri":"505a0d54e4b0c8380cd52f61","contributors":{"authors":[{"text":"Seccia, D.","contributorId":81323,"corporation":false,"usgs":true,"family":"Seccia","given":"D.","email":"","affiliations":[],"preferred":false,"id":435329,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chiarabba, C.","contributorId":39994,"corporation":false,"usgs":true,"family":"Chiarabba","given":"C.","email":"","affiliations":[],"preferred":false,"id":435327,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"De Gori, P.","contributorId":69377,"corporation":false,"usgs":true,"family":"De Gori","given":"P.","email":"","affiliations":[],"preferred":false,"id":435328,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bianchi, I.","contributorId":22165,"corporation":false,"usgs":true,"family":"Bianchi","given":"I.","email":"","affiliations":[],"preferred":false,"id":435325,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hill, D.P.","contributorId":27432,"corporation":false,"usgs":true,"family":"Hill","given":"D.P.","email":"","affiliations":[],"preferred":false,"id":435326,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70032388,"text":"70032388 - 2011 - Migration delays caused by anthropogenic barriers: Modeling dams, temperature, and success of migrating salmon smolts","interactions":[],"lastModifiedDate":"2012-03-12T17:21:20","indexId":"70032388","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1450,"text":"Ecological Applications","active":true,"publicationSubtype":{"id":10}},"title":"Migration delays caused by anthropogenic barriers: Modeling dams, temperature, and success of migrating salmon smolts","docAbstract":"Disruption to migration is a growing problem for conservation and restoration of animal populations. Anthropogenic barriers along migration paths can delay or prolong migrations, which may result in a mismatch with migration-timing adaptations. To understand the interaction of dams (as barriers along a migration path), seasonally changing environmental conditions, timing of Atlantic salmon (Salmo salar) downstream migration, and ultimate migration success, we used 10 years of river temperature and discharge data as a template upon which we simulated downstream movement of salmon. Atlantic salmon is a cool-water species whose downstream migrating smolts must complete migration before river temperatures become too warm. We found that dams had a local effect on survival as well as a survival effect that was spatially and temporally removed from the encounter with the dam. While smolts are delayed by dams, temperatures downstream can reach lethal or near-lethal temperatures;as a result, the match between completion of migration and the window of appropriate migration conditions can be disrupted. The strength of this spatially and temporally removed effect is at least comparable to the local effects of dams in determining smolt migration success in the presence of dams. We also considered smolts from different tributaries, varying in distance from the river mouth, to assess the potential importance of locally adapted migration timing on the effect of barriers. Migration-initiation temperature affected modeled smolt survival differentially across tributaries, with the success of smolts from upstream tributaries being much more variable across years than that of smolts with a shorter distance to travel. As a whole, these results point to the importance of broadening our spatial and temporal view when managing migrating populations. We must consider not only how many individuals never make it across migration barriers, but also the spatially and temporally removed consequences of delays at the barriers for those individuals that successfully navigate them. ??2011 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/10-0593.1","issn":"10510761","usgsCitation":"Marschall, E., Mather, M.E., Parrish, D., Allison, G., and McMenemy, J., 2011, Migration delays caused by anthropogenic barriers: Modeling dams, temperature, and success of migrating salmon smolts: Ecological Applications, v. 21, no. 8, p. 3014-3031, https://doi.org/10.1890/10-0593.1.","startPage":"3014","endPage":"3031","numberOfPages":"18","costCenters":[],"links":[{"id":213813,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/10-0593.1"},{"id":241472,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"21","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a56ffe4b0c8380cd6d99f","contributors":{"authors":[{"text":"Marschall, E.A.","contributorId":55124,"corporation":false,"usgs":true,"family":"Marschall","given":"E.A.","email":"","affiliations":[],"preferred":false,"id":435915,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mather, M. E.","contributorId":71708,"corporation":false,"usgs":true,"family":"Mather","given":"M.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":435916,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Parrish, D.L.","contributorId":15144,"corporation":false,"usgs":true,"family":"Parrish","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":435913,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Allison, G.W.","contributorId":16234,"corporation":false,"usgs":true,"family":"Allison","given":"G.W.","email":"","affiliations":[],"preferred":false,"id":435914,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"McMenemy, J.R.","contributorId":103480,"corporation":false,"usgs":true,"family":"McMenemy","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":435917,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70036114,"text":"70036114 - 2011 - Channel morphometry, sediment transport, and implications for tectonic activity and surficial ages of Titan basins","interactions":[],"lastModifiedDate":"2021-02-02T18:02:51.794264","indexId":"70036114","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Channel morphometry, sediment transport, and implications for tectonic activity and surficial ages of Titan basins","docAbstract":"<p><span>Fluvial features on Titan and drainage basins on Earth are remarkably similar despite differences in gravity and surface composition. We determined network bifurcation (</span><i>R<sub>b</sub></i><span>) ratios for five Titan and three terrestrial analog basins. Tectonically-modified Earth basins have&nbsp;</span><i>R<sub>b</sub></i><span>&nbsp;values greater than the expected range (3.0–5.0) for dendritic networks; comparisons with&nbsp;</span><i>R<sub>b</sub></i><span>&nbsp;values determined for Titan basins, in conjunction with similarities in network patterns, suggest that portions of Titan’s north polar region are modified by tectonic forces. Sufficient elevation data existed to calculate bed slope and potential fluvial sediment transport rates in at least one Titan basin, indicating that 75</span><span>&nbsp;</span><span>mm water ice grains (observed at the Huygens landing site) should be readily entrained given sufficient flow depths of liquid hydrocarbons. Volumetric sediment transport estimates suggest that ∼6700–10,000 Titan years (∼2.0–3.0</span><span>&nbsp;</span><span>×</span><span>&nbsp;</span><span>10</span><sup>5</sup><span>&nbsp;Earth years) are required to erode this basin to its minimum relief (assuming constant 1</span><span>&nbsp;</span><span>m and 1.5</span><span>&nbsp;</span><span>m flows); these lowering rates increase to ∼27,000–41,000 Titan years (∼8.0–12.0</span><span>&nbsp;</span><span>×</span><span>&nbsp;</span><span>10</span><sup>5</sup><span>&nbsp;Earth years) when flows in the north polar region are restricted to summer months.</span></p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.icarus.2011.03.011","issn":"00191035","usgsCitation":"Cartwright, R., Clayton, J., and Kirk, R.L., 2011, Channel morphometry, sediment transport, and implications for tectonic activity and surficial ages of Titan basins: Icarus, v. 214, no. 2, p. 561-570, https://doi.org/10.1016/j.icarus.2011.03.011.","productDescription":"10 p.","startPage":"561","endPage":"570","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":246493,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":218478,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.icarus.2011.03.011"}],"volume":"214","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f458e4b0c8380cd4bc97","contributors":{"authors":[{"text":"Cartwright, R.","contributorId":54838,"corporation":false,"usgs":true,"family":"Cartwright","given":"R.","email":"","affiliations":[],"preferred":false,"id":454291,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Clayton, J.A.","contributorId":71799,"corporation":false,"usgs":true,"family":"Clayton","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":454292,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kirk, Randolph L. 0000-0003-0842-9226 rkirk@usgs.gov","orcid":"https://orcid.org/0000-0003-0842-9226","contributorId":2765,"corporation":false,"usgs":true,"family":"Kirk","given":"Randolph","email":"rkirk@usgs.gov","middleInitial":"L.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":454293,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70032393,"text":"70032393 - 2011 - Measurements of Martian dust devil winds with HiRISE","interactions":[],"lastModifiedDate":"2018-11-01T15:46:34","indexId":"70032393","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Measurements of Martian dust devil winds with HiRISE","docAbstract":"<p><span>We report wind measurements within Martian dust devils observed in plan view from the High Resolution Imaging Science Experiment (HiRISE) orbiting Mars. The central color swath of the HiRISE instrument has three separate charge‐coupled devices (CCDs) and color filters that observe the surface in rapid cadence. Active features, such as dust devils, appear in motion when observed by this region of the instrument. Our image animations reveal clear circulatory motion within dust devils that is separate from their translational motion across the Martian surface. Both manual and automated tracking of dust devil clouds reveal tangential winds that approach 20–30 m s</span><sup>−1</sup><span>&nbsp;in some cases. These winds are sufficient to induce a ∼1% decrease in atmospheric pressure within the dust devil core relative to ambient, facilitating dust lifting by reducing the threshold wind speed for particle elevation. Finally, radial velocity profiles constructed from our automated measurements test the Rankine vortex model for dust devil structure. Our profiles successfully reveal the solid body rotation component in the interior, but fail to conclusively illuminate the profile in the outer regions of the vortex. One profile provides evidence for a velocity decrease as a function of r</span><sup>−1/2</sup><span>, instead of r</span><sup>−1</sup><span>, suggestive of surface friction effects. However, other profiles do not support this observation, or do not contain enough measurements to produce meaningful insights.</span></p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Research Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Geophysical Union","doi":"10.1029/2011GL049806","issn":"00948276","usgsCitation":"Choi, D., and Dundas, C.M., 2011, Measurements of Martian dust devil winds with HiRISE: Geophysical Research Letters, v. 38, no. 24, 5 p., https://doi.org/10.1029/2011GL049806.","productDescription":"5 p.","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":487058,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2011gl049806","text":"Publisher Index Page"},{"id":241542,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213876,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2011GL049806"}],"volume":"38","issue":"24","noUsgsAuthors":false,"publicationDate":"2011-12-31","publicationStatus":"PW","scienceBaseUri":"505a5325e4b0c8380cd6c8df","contributors":{"authors":[{"text":"Choi, D.S.","contributorId":86180,"corporation":false,"usgs":true,"family":"Choi","given":"D.S.","email":"","affiliations":[],"preferred":false,"id":435932,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dundas, Colin M. 0000-0003-2343-7224 cdundas@usgs.gov","orcid":"https://orcid.org/0000-0003-2343-7224","contributorId":2937,"corporation":false,"usgs":true,"family":"Dundas","given":"Colin","email":"cdundas@usgs.gov","middleInitial":"M.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":435931,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70034136,"text":"70034136 - 2011 - Equilibrium shoreline response of a high wave energy beach","interactions":[],"lastModifiedDate":"2012-03-12T17:21:44","indexId":"70034136","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2315,"text":"Journal of Geophysical Research C: Oceans","active":true,"publicationSubtype":{"id":10}},"title":"Equilibrium shoreline response of a high wave energy beach","docAbstract":"Four years of beach elevation surveys at Ocean Beach, San Francisco, California, are used to extend an existing equilibrium shoreline change model, previously calibrated with fine sand and moderate energy waves, to medium sand and higher-energy waves. The shoreline, characterized as the cross-shore location of the mean high water contour, varied seasonally by between 30 and 60 m, depending on the alongshore location. The equilibrium shoreline change model relates the rate of horizontal shoreline displacement to the hourly wave energy E and the wave energy disequilibrium, the difference between E and the equilibrium wave energy that would cause no change in the present shoreline location. Values for the model shoreline response coefficients are tuned to fit the observations in 500 m alongshore segments and averaged over segments where the model has good skill and the estimated effects of neglected alongshore sediment transport are relatively small. Using these representative response coefficients for 0.3 mm sand from Ocean Beach and driving the model with much lower-energy winter waves observed at San Onofre Beach (also 0.3 mm sand) in southern California, qualitatively reproduces the small seasonal shoreline fluctuations at San Onofre. This consistency suggests that the shoreline model response coefficients depend on grain size and may be constant, and thus transportable, between sites with similar grain size and different wave climates. The calibrated model response coefficients predict that for equal fluctuations in wave energy, changes in shoreline location on a medium-grained (0.3 mm) beach are much smaller than on a previously studied fine-grained (0.2 mm) beach. Copyright ?? 2011 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research C: Oceans","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2010JC006681","issn":"01480227","usgsCitation":"Yates, M., Guza, R., O’Reilly, W.C., Hansen, J., and Barnard, P., 2011, Equilibrium shoreline response of a high wave energy beach: Journal of Geophysical Research C: Oceans, v. 116, no. 4, https://doi.org/10.1029/2010JC006681.","costCenters":[],"links":[{"id":475564,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2010jc006681","text":"Publisher Index Page"},{"id":244870,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216967,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2010JC006681"}],"volume":"116","issue":"4","noUsgsAuthors":false,"publicationDate":"2011-04-15","publicationStatus":"PW","scienceBaseUri":"505a0a29e4b0c8380cd52216","contributors":{"authors":[{"text":"Yates, M.L.","contributorId":101116,"corporation":false,"usgs":true,"family":"Yates","given":"M.L.","email":"","affiliations":[],"preferred":false,"id":444271,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Guza, R.T.","contributorId":11854,"corporation":false,"usgs":true,"family":"Guza","given":"R.T.","email":"","affiliations":[],"preferred":false,"id":444267,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"O’Reilly, W. C.","contributorId":36780,"corporation":false,"usgs":true,"family":"O’Reilly","given":"W.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":444270,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hansen, J.E.","contributorId":11855,"corporation":false,"usgs":true,"family":"Hansen","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":444268,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Barnard, P.L.","contributorId":20527,"corporation":false,"usgs":true,"family":"Barnard","given":"P.L.","email":"","affiliations":[],"preferred":false,"id":444269,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70036109,"text":"70036109 - 2011 - No correlation between Anderson Reservoir stage level and underlying Calaveras fault seismicity despite calculated differential stress increases","interactions":[],"lastModifiedDate":"2021-02-02T19:19:03.490885","indexId":"70036109","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2626,"text":"Lithosphere","active":true,"publicationSubtype":{"id":10}},"title":"No correlation between Anderson Reservoir stage level and underlying Calaveras fault seismicity despite calculated differential stress increases","docAbstract":"<p><span>Concerns have been raised that stresses from reservoir impoundment may trigger damaging earthquakes because rate changes have been associated with reservoir impoundment or stage-level changes globally. Here, the idea is tested blindly using Anderson Reservoir, which lies atop the seismically active Calaveras fault. The only knowledge held by the author going into the study was the expectation that reservoir levels change cyclically because of seasonal rainfall. Examination of seismicity rates near the reservoir reveals variability, but no correlation with stage-level changes. Three-dimensional finite-element modeling shows stress changes sufficient for earthquake triggering along the Calaveras fault zone. Since many of the reported cases of induced triggering come from low-strain settings, it is speculated that gradual stressing from stage-level changes in high-strain settings may not be significant. From this study, it can be concluded that reservoirs are not necessarily risky in active tectonic settings.</span></p>","largerWorkTitle":"Lithosphere","language":"English","publisher":"GeoScienceWorld","doi":"10.1130/L148.1","issn":"19418264","usgsCitation":"Parsons, T., 2011, No correlation between Anderson Reservoir stage level and underlying Calaveras fault seismicity despite calculated differential stress increases: Lithosphere, v. 3, no. 4, p. 261-264, https://doi.org/10.1130/L148.1.","productDescription":"4 p.","startPage":"261","endPage":"264","numberOfPages":"4","costCenters":[],"links":[{"id":475442,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1130/l148.1","text":"Publisher Index Page"},{"id":246391,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":218389,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/L148.1"}],"country":"United States","state":"California","otherGeospatial":"Anderson Reservoir","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -122.958984375,\n              36.84446074079564\n            ],\n            [\n              -120.89355468749999,\n              36.84446074079564\n            ],\n            [\n              -120.89355468749999,\n              38.20365531807149\n            ],\n            [\n              -122.958984375,\n              38.20365531807149\n            ],\n            [\n              -122.958984375,\n              36.84446074079564\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"3","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6708e4b0c8380cd73136","contributors":{"authors":[{"text":"Parsons, T.","contributorId":48288,"corporation":false,"usgs":true,"family":"Parsons","given":"T.","email":"","affiliations":[],"preferred":false,"id":454260,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70032394,"text":"70032394 - 2011 - Inversion of ground-motion data from a seismometer array for rotation using a modification of Jaeger's method","interactions":[],"lastModifiedDate":"2020-03-23T09:45:16","indexId":"70032394","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Inversion of ground-motion data from a seismometer array for rotation using a modification of Jaeger's method","docAbstract":"We develop a new way to invert 2D translational waveforms using Jaeger's (1969) formula to derive rotational ground motions about one axis and estimate the errors in them using techniques from statistical multivariate analysis. This procedure can be used to derive rotational ground motions and strains using arrayed translational data, thus providing an efficient way to calibrate the performance of rotational sensors. This approach does not require a priori information about the noise level of the translational data and elastic properties of the media. This new procedure also provides estimates of the standard deviations of the derived rotations and strains. In this study, we validated this code using synthetic translational waveforms from a seismic array. The results after the inversion of the synthetics for rotations were almost identical with the results derived using a well-tested inversion procedure by Spudich and Fletcher (2009). This new 2D procedure can be applied three times to obtain the full, three-component rotations. Additional modifications can be implemented to the code in the future to study different features of the rotational ground motions and strains induced by the passage of seismic waves.","language":"English","publisher":"Seismological Society of America","doi":"10.1785/0120100204","issn":"00371106","usgsCitation":"Chi, W., Lee, W., Aston, J., Lin, C., and Liu, C., 2011, Inversion of ground-motion data from a seismometer array for rotation using a modification of Jaeger's method: Bulletin of the Seismological Society of America, v. 101, no. 6, p. 3105-3109, https://doi.org/10.1785/0120100204.","productDescription":"5 p.","startPage":"3105","endPage":"3109","numberOfPages":"5","ipdsId":"IP-022928","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":213877,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120100204"},{"id":241543,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"101","issue":"6","noUsgsAuthors":false,"publicationDate":"2011-12-08","publicationStatus":"PW","scienceBaseUri":"505a3e53e4b0c8380cd63ca6","contributors":{"authors":[{"text":"Chi, Wu-Cheng","contributorId":26148,"corporation":false,"usgs":true,"family":"Chi","given":"Wu-Cheng","email":"","affiliations":[],"preferred":false,"id":435933,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lee, W.H.K.","contributorId":35303,"corporation":false,"usgs":true,"family":"Lee","given":"W.H.K.","affiliations":[],"preferred":false,"id":435934,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Aston, J.A.D.","contributorId":55650,"corporation":false,"usgs":true,"family":"Aston","given":"J.A.D.","email":"","affiliations":[],"preferred":false,"id":435935,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lin, C.J.","contributorId":99385,"corporation":false,"usgs":true,"family":"Lin","given":"C.J.","email":"","affiliations":[],"preferred":false,"id":435937,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Liu, C.-C.","contributorId":89662,"corporation":false,"usgs":true,"family":"Liu","given":"C.-C.","affiliations":[],"preferred":false,"id":435936,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70036106,"text":"70036106 - 2011 - Mechanism of the 1996-97 non-eruptive volcano-tectonic earthquake swarm at Iliamna Volcano, Alaska","interactions":[],"lastModifiedDate":"2021-02-02T19:44:34.24175","indexId":"70036106","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1109,"text":"Bulletin of Volcanology","active":true,"publicationSubtype":{"id":10}},"title":"Mechanism of the 1996-97 non-eruptive volcano-tectonic earthquake swarm at Iliamna Volcano, Alaska","docAbstract":"<p><span>A significant number of volcano-tectonic (VT) earthquake swarms, some of which are accompanied by ground deformation and/or volcanic gas emissions, do not culminate in an eruption. These swarms are often thought to represent stalled intrusions of magma into the mid- or shallow-level crust. Real-time assessment of the likelihood that a VT swarm will culminate in an eruption is one of the key challenges of volcano monitoring, and retrospective analysis of non-eruptive swarms provides an important framework for future assessments. Here we explore models for a non-eruptive VT earthquake swarm located beneath Iliamna Volcano, Alaska, in May 1996–June 1997 through calculation and inversion of fault-plane solutions for swarm and background periods, and through Coulomb stress modeling of faulting types and hypocenter locations observed during the swarm. Through a comparison of models of deep and shallow intrusions to swarm observations, we aim to test the hypothesis that the 1996–97 swarm represented a shallow intrusion, or “failed” eruption. Observations of the 1996–97 swarm are found to be consistent with several scenarios including both shallow and deep intrusion, most likely involving a relatively small volume of intruded magma and/or a low degree of magma pressurization corresponding to a relatively low likelihood of eruption.</span></p>","language":"English","publisher":"Springer Link","doi":"10.1007/s00445-010-0439-7","issn":"02588900","usgsCitation":"Roman, D., and Power, J.A., 2011, Mechanism of the 1996-97 non-eruptive volcano-tectonic earthquake swarm at Iliamna Volcano, Alaska: Bulletin of Volcanology, v. 73, no. 2, p. 143-153, https://doi.org/10.1007/s00445-010-0439-7.","productDescription":"11 p.","startPage":"143","endPage":"153","costCenters":[],"links":[{"id":246329,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":218330,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00445-010-0439-7"}],"country":"United States","state":"Alaska","otherGeospatial":"Iliamna Volcano","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -154.68749999999997,\n              58.802361927759456\n            ],\n            [\n              -147.67822265625,\n              58.802361927759456\n            ],\n            [\n              -147.67822265625,\n              62.32920841458002\n            ],\n            [\n              -154.68749999999997,\n              62.32920841458002\n            ],\n            [\n              -154.68749999999997,\n              58.802361927759456\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"73","issue":"2","noUsgsAuthors":false,"publicationDate":"2011-02-27","publicationStatus":"PW","scienceBaseUri":"505a5367e4b0c8380cd6ca6a","contributors":{"authors":[{"text":"Roman, Diana","contributorId":237832,"corporation":false,"usgs":false,"family":"Roman","given":"Diana","affiliations":[{"id":47620,"text":"Dept. of Terrestrial Magnetism, Carnegie Institution for Science, Washington DC 20015","active":true,"usgs":false}],"preferred":false,"id":454217,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Power, John A. 0000-0002-7233-4398 jpower@usgs.gov","orcid":"https://orcid.org/0000-0002-7233-4398","contributorId":2768,"corporation":false,"usgs":true,"family":"Power","given":"John","email":"jpower@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":454216,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70032415,"text":"70032415 - 2011 - A heuristic simulation model of Lake Ontario circulation and mass balance transport","interactions":[],"lastModifiedDate":"2012-03-12T17:21:20","indexId":"70032415","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2299,"text":"Journal of Freshwater Ecology","active":true,"publicationSubtype":{"id":10}},"title":"A heuristic simulation model of Lake Ontario circulation and mass balance transport","docAbstract":"The redistribution of suspended organisms and materials by large-scale currents is part of natural ecological processes in large aquatic systems but can contribute to ecosystem disruption when exotic elements are introduced into the system. Toxic compounds and planktonic organisms spend various lengths of time in suspension before settling to the bottom or otherwise being removed. We constructed a simple physical simulation model, including the influence of major tributaries, to qualitatively examine circulation patterns in Lake Ontario. We used a simple mass balance approach to estimate the relative water input to and export from each of 10 depth regime-specific compartments (nearshore vs. offshore) comprising Lake Ontario. Despite its simplicity, our model produced circulation patterns similar to those reported by more complex studies in the literature. A three-gyre pattern, with the classic large counterclockwise central lake circulation, and a simpler two-gyre system were both observed. These qualitative simulations indicate little offshore transport along the south shore, except near the mouths of the Niagara River and Oswego River. Complex flow structure was evident, particularly near the Niagara River mouth and in offshore waters of the eastern basin. Average Lake Ontario residence time is 8 years, but the fastest model pathway indicated potential transport of plankton through the lake in as little as 60 days. This simulation illustrates potential invasion pathways and provides rough estimates of planktonic larval dispersal or chemical transport among nearshore and offshore areas of Lake Ontario. ?? 2011 Taylor & Francis.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Freshwater Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1080/02705060.2011.553928","issn":"02705060","usgsCitation":"McKenna, J., and Chalupnicki, M., 2011, A heuristic simulation model of Lake Ontario circulation and mass balance transport: Journal of Freshwater Ecology, v. 26, no. 1, p. 123-132, https://doi.org/10.1080/02705060.2011.553928.","startPage":"123","endPage":"132","numberOfPages":"10","costCenters":[],"links":[{"id":475084,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1080/02705060.2011.553928","text":"Publisher Index Page"},{"id":213717,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1080/02705060.2011.553928"},{"id":241372,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e41be4b0c8380cd463f6","contributors":{"authors":[{"text":"McKenna, J.E. Jr.","contributorId":106065,"corporation":false,"usgs":true,"family":"McKenna","given":"J.E.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":436053,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chalupnicki, M.A.","contributorId":37966,"corporation":false,"usgs":true,"family":"Chalupnicki","given":"M.A.","affiliations":[],"preferred":false,"id":436052,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70033791,"text":"70033791 - 2011 - Trends in pesticide concentrations in streams of the western United States, 1993-2005","interactions":[],"lastModifiedDate":"2018-10-17T09:53:28","indexId":"70033791","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","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":"Trends in pesticide concentrations in streams of the western United States, 1993-2005","docAbstract":"<p><span>Trends in pesticide concentrations for 15 streams in California, Oregon, Washington, and Idaho were determined for the organophosphate insecticides chlorpyrifos and diazinon and the herbicides atrazine, s‐ethyl diproplythiocarbamate (EPTC), metolachlor, simazine, and trifluralin. A parametric regression model was used to account for flow, seasonality, and antecedent hydrologic conditions and thereby estimate trends in pesticide concentrations in streams arising from changes in use amount and application method in their associated catchments. Decreasing trends most often were observed for diazinon, and reflect the shift to alternative pesticides by farmers, commercial applicators, and homeowners because of use restrictions and product cancelation. Consistent trends were observed for several herbicides, including upward trends in simazine at urban‐influenced sites from 2000 to 2005, and downward trends in atrazine and EPTC at agricultural sites from the mid‐1990s to 2005. The model provided additional information about pesticide occurrence and transport in the modeled streams. Two examples are presented and briefly discussed: (1) timing of peak concentrations for individual compounds varied greatly across this geographic gradient because of different application periods and the effects of local rain patterns, irrigation, and soil drainage and (2) reconstructions of continuous diazinon concentrations at sites in California are used to evaluate compliance with total maximum daily load targets.</span></p>","language":"English","publisher":"American Water Resources Association","doi":"10.1111/j.1752-1688.2010.00507.x","issn":"1093474X","usgsCitation":"Johnson, H.M., Domagalski, J.L., and Saleh, D., 2011, Trends in pesticide concentrations in streams of the western United States, 1993-2005: Journal of the American Water Resources Association, v. 47, no. 2, p. 265-286, https://doi.org/10.1111/j.1752-1688.2010.00507.x.","productDescription":"22 p.","startPage":"265","endPage":"286","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true}],"links":[{"id":487145,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1752-1688.2010.00507.x","text":"Publisher Index Page"},{"id":241839,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214145,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1752-1688.2010.00507.x"}],"country":"United States","volume":"47","issue":"2","noUsgsAuthors":false,"publicationDate":"2010-12-06","publicationStatus":"PW","scienceBaseUri":"505bb7d9e4b08c986b32750d","contributors":{"authors":[{"text":"Johnson, Henry M. 0000-0002-7571-4994 hjohnson@usgs.gov","orcid":"https://orcid.org/0000-0002-7571-4994","contributorId":869,"corporation":false,"usgs":true,"family":"Johnson","given":"Henry","email":"hjohnson@usgs.gov","middleInitial":"M.","affiliations":[{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true}],"preferred":true,"id":442494,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Domagalski, Joseph L. 0000-0002-6032-757X joed@usgs.gov","orcid":"https://orcid.org/0000-0002-6032-757X","contributorId":1330,"corporation":false,"usgs":true,"family":"Domagalski","given":"Joseph","email":"joed@usgs.gov","middleInitial":"L.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":442493,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Saleh, Dina 0000-0002-1406-9303 dsaleh@usgs.gov","orcid":"https://orcid.org/0000-0002-1406-9303","contributorId":939,"corporation":false,"usgs":true,"family":"Saleh","given":"Dina","email":"dsaleh@usgs.gov","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":442495,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70036272,"text":"70036272 - 2011 - Host and viral ecology determine bat rabies seasonality and maintenance","interactions":[],"lastModifiedDate":"2012-03-12T17:22:02","indexId":"70036272","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3165,"text":"Proceedings of the National Academy of Sciences of the United States of America","active":true,"publicationSubtype":{"id":10}},"title":"Host and viral ecology determine bat rabies seasonality and maintenance","docAbstract":"Rabies is an acute viral infection that is typically fatal. Most rabies modeling has focused on disease dynamics and control within terrestrial mammals (e.g., raccoons and foxes). As such, rabies in bats has been largely neglected until recently. Because bats have been implicated as natural reservoirs for several emerging zoonotic viruses, including SARS-like corona viruses, henipaviruses, and lyssaviruses, understanding how pathogens are maintained within a population becomes vital. Unfortunately, little is known about maintenance mechanisms for any pathogen in bat populations. We present a mathematical model parameterized with unique data from an extensive study of rabies in a Colorado population of big brown bats (Eptesicus fuscus) to elucidate general maintenance mechanisms. We propose that life history patterns of many species of temperate-zone bats, coupled with sufficiently long incubation periods, allows for rabies virus maintenance. Seasonal variability in bat mortality rates, specifically low mortality during hibernation, allows long-term bat population viability. Within viable bat populations, sufficiently long incubation periods allow enough infected individuals to enter hibernation and survive until the following year, and hence avoid an epizootic fadeout of rabies virus. We hypothesize that the slowing effects of hibernation on metabolic and viral activity maintains infected individuals and their pathogens until susceptibles from the annual birth pulse become infected and continue the cycle. This research provides a context to explore similar host ecology and viral dynamics that may explain seasonal patterns and maintenance of other bat-borne diseases.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Proceedings of the National Academy of Sciences of the United States of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1073/pnas.1010875108","issn":"00278424","usgsCitation":"George, D., Webb, C., Farnsworth, M.L., O'Shea, T., Bowen, R.A., Smith, D., Stanley, T., Ellison, L., and Rupprecht, C.E., 2011, Host and viral ecology determine bat rabies seasonality and maintenance: Proceedings of the National Academy of Sciences of the United States of America, v. 108, no. 25, p. 10208-10213, https://doi.org/10.1073/pnas.1010875108.","startPage":"10208","endPage":"10213","numberOfPages":"6","costCenters":[],"links":[{"id":475263,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://europepmc.org/articles/pmc3121824","text":"External Repository"},{"id":218575,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1073/pnas.1010875108"},{"id":246600,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"108","issue":"25","noUsgsAuthors":false,"publicationDate":"2011-06-06","publicationStatus":"PW","scienceBaseUri":"505a322ce4b0c8380cd5e5a5","contributors":{"authors":[{"text":"George, D.B.","contributorId":17865,"corporation":false,"usgs":true,"family":"George","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":455202,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Webb, C.T.","contributorId":84199,"corporation":false,"usgs":true,"family":"Webb","given":"C.T.","affiliations":[],"preferred":false,"id":455208,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Farnsworth, Matthew L.","contributorId":56473,"corporation":false,"usgs":false,"family":"Farnsworth","given":"Matthew","email":"","middleInitial":"L.","affiliations":[{"id":12434,"text":"USDA, Wildlife Services, National Wildlife Research Center","active":true,"usgs":false}],"preferred":false,"id":455205,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"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":455204,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bowen, R. A.","contributorId":80623,"corporation":false,"usgs":false,"family":"Bowen","given":"R.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":455207,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Smith, D.L.","contributorId":41833,"corporation":false,"usgs":true,"family":"Smith","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":455203,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Stanley, T.R.","contributorId":61379,"corporation":false,"usgs":true,"family":"Stanley","given":"T.R.","affiliations":[],"preferred":false,"id":455206,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Ellison, L.E.","contributorId":103610,"corporation":false,"usgs":true,"family":"Ellison","given":"L.E.","email":"","affiliations":[],"preferred":false,"id":455210,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Rupprecht, C. E.","contributorId":101602,"corporation":false,"usgs":false,"family":"Rupprecht","given":"C.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":455209,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70036036,"text":"70036036 - 2011 - Synthesis of isotopically modified ZnO nanoparticles and their potential as nanotoxicity tracers","interactions":[],"lastModifiedDate":"2020-01-09T19:32:01","indexId":"70036036","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1555,"text":"Environmental Pollution","active":true,"publicationSubtype":{"id":10}},"title":"Synthesis of isotopically modified ZnO nanoparticles and their potential as nanotoxicity tracers","docAbstract":"<p><span>Understanding the behavior of engineered&nbsp;nanoparticles&nbsp;in the environment and within organisms is perhaps the biggest obstacle to the safe development of&nbsp;nanotechnologies. Reliable tracing is a particular issue for nanoparticles such as ZnO, because Zn is an essential element and a common pollutant thus present at elevated background concentrations. We synthesized isotopically enriched (89.6%) with a rare isotope of Zn (</span><sup>67</sup><span>Zn) ZnO nanoparticles and measured the uptake of&nbsp;</span><sup>67</sup><span>Zn by&nbsp;</span><i>L. stagnalis</i><span>&nbsp;exposed to&nbsp;diatoms&nbsp;amended with the particles.&nbsp;Stable isotope technique&nbsp;is sufficiently sensitive to determine the uptake of Zn at an exposure equivalent to lower concentration range (&lt;15&nbsp;μg&nbsp;g</span><sup>−1</sup><span>). Without a tracer, detection of newly accumulated Zn is significant at Zn exposure concentration only above 5000&nbsp;μg&nbsp;g</span><sup>−1</sup><span>&nbsp;which represents some of the most contaminated Zn conditions. Only by using a tracer we can study Zn uptake at a range of environmentally realistic exposure conditions.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.envpol.2010.08.032","issn":"02697491","usgsCitation":"Dybowska, A., Croteau, M.N., Misra, S., Berhanu, D., Luoma, S.N., Christian, P., O'Brien, P., and Valsami-Jones, E., 2011, Synthesis of isotopically modified ZnO nanoparticles and their potential as nanotoxicity tracers: Environmental Pollution, v. 159, no. 1, p. 266-273, https://doi.org/10.1016/j.envpol.2010.08.032.","productDescription":"8 p.","startPage":"266","endPage":"273","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":246294,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":218295,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.envpol.2010.08.032"}],"volume":"159","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba355e4b08c986b31fc73","chorus":{"doi":"10.1016/j.envpol.2010.08.032","url":"http://dx.doi.org/10.1016/j.envpol.2010.08.032","publisher":"Elsevier BV","authors":"Dybowska Agnieszka D., Croteau Marie-Noele, Misra Superb K., Berhanu Deborah, Luoma Samuel N., Christian Paul, O’Brien Paul, Valsami-Jones Eugenia","journalName":"Environmental Pollution","publicationDate":"1/2011"},"contributors":{"authors":[{"text":"Dybowska, A.D.","contributorId":85443,"corporation":false,"usgs":true,"family":"Dybowska","given":"A.D.","email":"","affiliations":[],"preferred":false,"id":453713,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Croteau, Marie Noele 0000-0003-0346-3580 mcroteau@usgs.gov","orcid":"https://orcid.org/0000-0003-0346-3580","contributorId":895,"corporation":false,"usgs":true,"family":"Croteau","given":"Marie","email":"mcroteau@usgs.gov","middleInitial":"Noele","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"preferred":true,"id":453710,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Misra, S.K.","contributorId":47989,"corporation":false,"usgs":true,"family":"Misra","given":"S.K.","email":"","affiliations":[],"preferred":false,"id":453711,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Berhanu, D.","contributorId":86177,"corporation":false,"usgs":true,"family":"Berhanu","given":"D.","email":"","affiliations":[],"preferred":false,"id":453714,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Luoma, Samuel N. 0000-0001-5443-5091 snluoma@usgs.gov","orcid":"https://orcid.org/0000-0001-5443-5091","contributorId":2287,"corporation":false,"usgs":true,"family":"Luoma","given":"Samuel","email":"snluoma@usgs.gov","middleInitial":"N.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":453715,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Christian, P.","contributorId":58527,"corporation":false,"usgs":true,"family":"Christian","given":"P.","email":"","affiliations":[],"preferred":false,"id":453712,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"O'Brien, P.","contributorId":98600,"corporation":false,"usgs":true,"family":"O'Brien","given":"P.","affiliations":[],"preferred":false,"id":453716,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Valsami-Jones, E.","contributorId":103088,"corporation":false,"usgs":true,"family":"Valsami-Jones","given":"E.","affiliations":[],"preferred":false,"id":453717,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70032514,"text":"70032514 - 2011 - Pseudospectral modeling and dispersion analysis of Rayleigh waves in viscoelastic media","interactions":[],"lastModifiedDate":"2012-03-12T17:21:21","indexId":"70032514","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3418,"text":"Soil Dynamics and Earthquake Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Pseudospectral modeling and dispersion analysis of Rayleigh waves in viscoelastic media","docAbstract":"Multichannel Analysis of Surface Waves (MASW) is one of the most widely used techniques in environmental and engineering geophysics to determine shear-wave velocities and dynamic properties, which is based on the elastic layered system theory. Wave propagation in the Earth, however, has been recognized as viscoelastic and the propagation of Rayleigh waves presents substantial differences in viscoelastic media as compared with elastic media. Therefore, it is necessary to carry out numerical simulation and dispersion analysis of Rayleigh waves in viscoelastic media to better understand Rayleigh-wave behaviors in the real world. We apply a pseudospectral method to the calculation of the spatial derivatives using a Chebyshev difference operator in the vertical direction and a Fourier difference operator in the horizontal direction based on the velocity-stress elastodynamic equations and relations of linear viscoelastic solids. This approach stretches the spatial discrete grid to have a minimum grid size near the free surface so that high accuracy and resolution are achieved at the free surface, which allows an effective incorporation of the free surface boundary conditions since the Chebyshev method is nonperiodic. We first use an elastic homogeneous half-space model to demonstrate the accuracy of the pseudospectral method comparing with the analytical solution, and verify the correctness of the numerical modeling results for a viscoelastic half-space comparing the phase velocities of Rayleigh wave between the theoretical values and the dispersive image generated by high-resolution linear Radon transform. We then simulate three types of two-layer models to analyze dispersive-energy characteristics for near-surface applications. Results demonstrate that the phase velocity of Rayleigh waves in viscoelastic media is relatively higher than in elastic media and the fundamental mode increases by 10-16% when the frequency is above 10. Hz due to the velocity dispersion of P and S waves. ?? 2011 Elsevier Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Soil Dynamics and Earthquake Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.soildyn.2011.05.004","issn":"02677261","usgsCitation":"Zhang, K., Luo, Y., Xia, J., and Chen, C., 2011, Pseudospectral modeling and dispersion analysis of Rayleigh waves in viscoelastic media: Soil Dynamics and Earthquake Engineering, v. 31, no. 10, p. 1332-1337, https://doi.org/10.1016/j.soildyn.2011.05.004.","startPage":"1332","endPage":"1337","numberOfPages":"6","costCenters":[],"links":[{"id":213723,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.soildyn.2011.05.004"},{"id":241378,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"31","issue":"10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8fc5e4b0c8380cd7f961","contributors":{"authors":[{"text":"Zhang, K.","contributorId":71724,"corporation":false,"usgs":true,"family":"Zhang","given":"K.","email":"","affiliations":[],"preferred":false,"id":436574,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Luo, Y.","contributorId":28417,"corporation":false,"usgs":true,"family":"Luo","given":"Y.","email":"","affiliations":[],"preferred":false,"id":436572,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Xia, J.","contributorId":63513,"corporation":false,"usgs":true,"family":"Xia","given":"J.","email":"","affiliations":[],"preferred":false,"id":436573,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Chen, C.","contributorId":98490,"corporation":false,"usgs":true,"family":"Chen","given":"C.","email":"","affiliations":[],"preferred":false,"id":436575,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70032548,"text":"70032548 - 2011 - Self-potential investigations of a gravel bar in a restored river corridor","interactions":[],"lastModifiedDate":"2012-03-12T17:21:21","indexId":"70032548","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1928,"text":"Hydrology and Earth System Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Self-potential investigations of a gravel bar in a restored river corridor","docAbstract":"Self-potentials (SP) are sensitive to water fluxes and concentration gradients in both saturated and unsaturated geological media, but quantitative interpretations of SP field data may often be hindered by the superposition of different source contributions and time-varying electrode potentials. Self-potential mapping and close to two months of SP monitoring on a gravel bar were performed to investigate the origins of SP signals at a restored river section of the Thur River in northeastern Switzerland. The SP mapping and subsequent inversion of the data indicate that the SP sources are mainly located in the upper few meters in regions of soil cover rather than bare gravel. Wavelet analyses of the time-series indicate a strong, but non-linear influence of water table and water content variations, as well as rainfall intensity on the recorded SP signals. Modeling of the SP response with respect to an increase in the water table elevation and precipitation indicate that the distribution of soil properties in the vadose zone has a very strong influence. We conclude that the observed SP responses on the gravel bar are more complicated than previously proposed semi-empiric relationships between SP signals and hydraulic head or the thickness of the vadose zone. We suggest that future SP monitoring in restored river corridors should either focus on quantifying vadose zone processes by installing vertical profiles of closely spaced SP electrodes or by installing the electrodes within the river to avoid signals arising from vadose zone processes and time-varying electrochemical conditions in the vicinity of the electrodes. ?? 2011 Author(s).","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrology and Earth System Sciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.5194/hess-15-729-2011","issn":"10275606","usgsCitation":"Linde, N., Doetsch, J., Jougnot, D., Genoni, O., Durst, Y., Minsley, B., Vogt, T., Pasquale, N., and Luster, J., 2011, Self-potential investigations of a gravel bar in a restored river corridor: Hydrology and Earth System Sciences, v. 15, no. 3, p. 729-742, https://doi.org/10.5194/hess-15-729-2011.","startPage":"729","endPage":"742","numberOfPages":"14","costCenters":[],"links":[{"id":475085,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.5194/hess-15-729-2011","text":"Publisher Index Page"},{"id":241348,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213695,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.5194/hess-15-729-2011"}],"volume":"15","issue":"3","noUsgsAuthors":false,"publicationDate":"2011-03-04","publicationStatus":"PW","scienceBaseUri":"505b8d02e4b08c986b31821d","contributors":{"authors":[{"text":"Linde, N.","contributorId":37545,"corporation":false,"usgs":true,"family":"Linde","given":"N.","email":"","affiliations":[],"preferred":false,"id":436761,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Doetsch, J.","contributorId":35131,"corporation":false,"usgs":true,"family":"Doetsch","given":"J.","email":"","affiliations":[],"preferred":false,"id":436760,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jougnot, D.","contributorId":102697,"corporation":false,"usgs":true,"family":"Jougnot","given":"D.","email":"","affiliations":[],"preferred":false,"id":436766,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Genoni, O.","contributorId":7918,"corporation":false,"usgs":true,"family":"Genoni","given":"O.","email":"","affiliations":[],"preferred":false,"id":436758,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Durst, Y.","contributorId":20989,"corporation":false,"usgs":true,"family":"Durst","given":"Y.","email":"","affiliations":[],"preferred":false,"id":436759,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Minsley, B. J.","contributorId":52107,"corporation":false,"usgs":true,"family":"Minsley","given":"B. J.","affiliations":[],"preferred":false,"id":436764,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Vogt, T.","contributorId":66925,"corporation":false,"usgs":true,"family":"Vogt","given":"T.","email":"","affiliations":[],"preferred":false,"id":436765,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Pasquale, N.","contributorId":43991,"corporation":false,"usgs":true,"family":"Pasquale","given":"N.","email":"","affiliations":[],"preferred":false,"id":436762,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Luster, J.","contributorId":51101,"corporation":false,"usgs":true,"family":"Luster","given":"J.","email":"","affiliations":[],"preferred":false,"id":436763,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70034482,"text":"70034482 - 2011 - Refuge habitats for fishes during seasonal drying in an intermittent stream: Movement, survival and abundance of three minnow species","interactions":[],"lastModifiedDate":"2021-04-19T20:41:47.368478","indexId":"70034482","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":873,"text":"Aquatic Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Refuge habitats for fishes during seasonal drying in an intermittent stream: Movement, survival and abundance of three minnow species","docAbstract":"<p><span>Drought and summer drying can be important disturbance events in many small streams leading to intermittent or isolated habitats. We examined what habitats act as refuges for fishes during summer drying, hypothesizing that pools would act as refuge habitats. We predicted that during drying fish would show directional movement into pools from riffle habitats, survival rates would be greater in pools than in riffles, and fish abundance would increase in pool habitats. We examined movement, survival and abundance of three minnow species, bigeye shiner (</span><i>Notropis boops</i><span>), highland stoneroller (</span><i>Campostoma spadiceum</i><span>) and creek chub (</span><i>Semotilus atromaculatus</i><span>), during seasonal stream drying in an Ozark stream using a closed robust multi-strata mark-recapture sampling. Population parameters were estimated using plausible models within program MARK, where a priori models are ranked using Akaike’s Information Criterion. Creek chub showed directional movement into pools and increased survival and abundance in pools during drying. Highland stonerollers showed strong directional movement into pools and abundance increased in pools during drying, but survival rates were not significantly greater in pools than riffles. Bigeye shiners showed high movement rates during drying, but the movement was non-directional, and survival rates were greater in riffles than pools. Therefore, creek chub supported our hypothesis and pools appear to act as refuge habitats for this species, whereas highland stonerollers partly supported the hypothesis and bigeye shiners did not support the pool refuge hypothesis. Refuge habitats during drying are species dependent. An urgent need exists to further understand refuge habitats in streams given projected changes in climate and continued alteration of hydrological regimes.</span></p>","language":"English","publisher":"Springer Link","doi":"10.1007/s00027-011-0206-7","issn":"10151621","usgsCitation":"Hodges, S., and Magoulick, D., 2011, Refuge habitats for fishes during seasonal drying in an intermittent stream: Movement, survival and abundance of three minnow species: Aquatic Sciences, v. 73, no. 4, p. 513-522, https://doi.org/10.1007/s00027-011-0206-7.","productDescription":"10 p.","startPage":"513","endPage":"522","costCenters":[],"links":[{"id":243718,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215883,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00027-011-0206-7"}],"volume":"73","issue":"4","noUsgsAuthors":false,"publicationDate":"2011-05-17","publicationStatus":"PW","scienceBaseUri":"50e4a450e4b0e8fec6cdbb25","contributors":{"authors":[{"text":"Hodges, S.W.","contributorId":98563,"corporation":false,"usgs":true,"family":"Hodges","given":"S.W.","email":"","affiliations":[],"preferred":false,"id":446028,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Magoulick, D.D.","contributorId":80862,"corporation":false,"usgs":true,"family":"Magoulick","given":"D.D.","affiliations":[],"preferred":false,"id":446027,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70033961,"text":"70033961 - 2011 - Trophic magnification of PCBs and its relationship to the octanol-water partition coefficient","interactions":[],"lastModifiedDate":"2012-03-12T17:21:44","indexId":"70033961","displayToPublicDate":"2011-01-01T00:00:00","publicationYear":"2011","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":"Trophic magnification of PCBs and its relationship to the octanol-water partition coefficient","docAbstract":"We investigated polychlorinated biphenyl (PCB) bioaccumulation relative to octanol-water partition coefficient (KOW) and organism trophic position (TP) at the Lake Hartwell Superfund site (South Carolina). We measured PCBs (127 congeners) and stable isotopes (??15N) in sediment, organic matter, phytoplankton, zooplankton, macroinvertebrates, and fish. TP, as calculated from ??15N, was significantly, positively related to PCB concentrations, and food web trophic magnification factors (TMFs) ranged from 1.5-6.6 among congeners. TMFs of individual congeners increased strongly with log KOW, as did the predictive power (r2) of individual TP-PCB regression models used to calculate TMFs. We developed log KOW-TMF models for eight food webs with vastly different environments (freshwater, marine, arctic, temperate) and species composition (cold- vs warmblooded consumers). The effect of KOW on congener TMFs varied strongly across food webs (model slopes 0.0-15.0) because the range of TMFs among studies was also highly variable. We standardized TMFs within studies to mean = 0, standard deviation (SD) = 1 to normalize for scale differences and found a remarkably consistent KOW effect on TMFs (no difference in model slopes among food webs). Our findings underscore the importance of hydrophobicity (as characterized by KOW) in regulating bioaccumulation of recalcitrant compounds in aquatic systems, and demonstrate that relationships between chemical KOW and bioaccumulation from field studies are more generalized than previously recognized. ?? This article not subject to U.S. Copyright. Published 2011 by the American Chemical Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Science and Technology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1021/es103158s","issn":"0013936X","usgsCitation":"Walters, D., Mills, M., Cade, B., and Burkard, L., 2011, Trophic magnification of PCBs and its relationship to the octanol-water partition coefficient: Environmental Science & Technology, v. 45, no. 9, p. 3917-3924, https://doi.org/10.1021/es103158s.","startPage":"3917","endPage":"3924","numberOfPages":"8","costCenters":[],"links":[{"id":216711,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es103158s"},{"id":244597,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"9","noUsgsAuthors":false,"publicationDate":"2011-04-05","publicationStatus":"PW","scienceBaseUri":"505bb887e4b08c986b3278e8","contributors":{"authors":[{"text":"Walters, D.M.","contributorId":41507,"corporation":false,"usgs":true,"family":"Walters","given":"D.M.","email":"","affiliations":[],"preferred":false,"id":443417,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mills, M.A.","contributorId":77764,"corporation":false,"usgs":true,"family":"Mills","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":443420,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cade, B.S.","contributorId":47315,"corporation":false,"usgs":true,"family":"Cade","given":"B.S.","affiliations":[],"preferred":false,"id":443419,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Burkard, L.P.","contributorId":44386,"corporation":false,"usgs":true,"family":"Burkard","given":"L.P.","email":"","affiliations":[],"preferred":false,"id":443418,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
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