{"pageNumber":"2326","pageRowStart":"58125","pageSize":"25","recordCount":184617,"records":[{"id":70032177,"text":"70032177 - 2007 - Suboxic deep seawater in the late Paleoproterozoic: Evidence from hematitic chert and iron formation related to seafloor-hydrothermal sulfide deposits, central Arizona, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:56","indexId":"70032177","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"Suboxic deep seawater in the late Paleoproterozoic: Evidence from hematitic chert and iron formation related to seafloor-hydrothermal sulfide deposits, central Arizona, USA","docAbstract":"A current model for the evolution of Proterozoic deep seawater composition involves a change from anoxic sulfide-free to sulfidic conditions 1.8??Ga. In an earlier model the deep ocean became oxic at that time. Both models are based on the secular distribution of banded iron formation (BIF) in shallow marine sequences. We here present a new model based on rare earth elements, especially redox-sensitive Ce, in hydrothermal silica-iron oxide sediments from deeper-water, open-marine settings related to volcanogenic massive sulfide (VMS) deposits. In contrast to Archean, Paleozoic, and modern hydrothermal iron oxide sediments, 1.74 to 1.71??Ga hematitic chert (jasper) and iron formation in central Arizona, USA, show moderate positive to small negative Ce anomalies, suggesting that the redox state of the deep ocean then was at a transitional, suboxic state with low concentrations of dissolved O2 but no H2S. The presence of jasper and/or iron formation related to VMS deposits in other volcanosedimentary sequences ca. 1.79-1.69??Ga, 1.40??Ga, and 1.24??Ga also reflects oxygenated and not sulfidic deep ocean waters during these time periods. Suboxic conditions in the deep ocean are consistent with the lack of shallow-marine BIF ??? 1.8 to 0.8??Ga, and likely limited nutrient concentrations in seawater and, consequently, may have constrained biological evolution. ?? 2006 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Earth and Planetary Science Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.epsl.2006.12.018","issn":"0012821X","usgsCitation":"Slack, J.F., Grenne, T., Bekker, A., Rouxel, O., and Lindberg, P.A., 2007, Suboxic deep seawater in the late Paleoproterozoic: Evidence from hematitic chert and iron formation related to seafloor-hydrothermal sulfide deposits, central Arizona, USA: Earth and Planetary Science Letters, v. 255, no. 1-2, p. 243-256, https://doi.org/10.1016/j.epsl.2006.12.018.","startPage":"243","endPage":"256","numberOfPages":"14","costCenters":[],"links":[{"id":215066,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.epsl.2006.12.018"},{"id":242835,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"255","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9d45e4b08c986b31d740","contributors":{"authors":[{"text":"Slack, J. F.","contributorId":75917,"corporation":false,"usgs":true,"family":"Slack","given":"J.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":434879,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Grenne, Tor","contributorId":7460,"corporation":false,"usgs":false,"family":"Grenne","given":"Tor","email":"","affiliations":[{"id":35509,"text":"Geological Survey of Norway","active":true,"usgs":false}],"preferred":false,"id":434876,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bekker, A.","contributorId":9480,"corporation":false,"usgs":true,"family":"Bekker","given":"A.","email":"","affiliations":[],"preferred":false,"id":434877,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rouxel, O.J.","contributorId":32001,"corporation":false,"usgs":true,"family":"Rouxel","given":"O.J.","email":"","affiliations":[],"preferred":false,"id":434878,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lindberg, P. A.","contributorId":79189,"corporation":false,"usgs":true,"family":"Lindberg","given":"P.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":434880,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031962,"text":"70031962 - 2007 - Diel mercury-concentration variations in streams affected by mining and geothermal discharge","interactions":[],"lastModifiedDate":"2018-10-16T09:28:15","indexId":"70031962","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3352,"text":"Science of the Total Environment","active":true,"publicationSubtype":{"id":10}},"title":"Diel mercury-concentration variations in streams affected by mining and geothermal discharge","docAbstract":"<p><span>Diel variations of concentrations of unfiltered and filtered total Hg and filtered methyl Hg were documented during 24-h sampling episodes in water from Silver Creek, which drains a historical gold-mining district near Helena, Montana, and the Madison River, which drains the geothermal system of Yellowstone National Park. The concentrations of filtered methyl Hg had relatively large diel variations (increases of 68 and 93% from morning minima) in both streams. Unfiltered and filtered (0.1-μm filtration) total Hg in Silver Creek had diel concentration increases of 24% and 7%, respectively. In the Madison River, concentrations of unfiltered and filtered total Hg did not change during the sampling period. The concentration variation of unfiltered total Hg in Silver Creek followed the diel variation in suspended-particle concentration. The concentration variation of filtered total and methyl Hg followed the solar photocycle, with highest concentrations during the early afternoon and evening and lowest concentrations during the morning. None of the diel Hg variations correlated with diel variation in streamflow or major ion concentrations. The diel variation in filtered total Hg could have been produced by adsorption–desorption of Hg</span><sup>2+</sup><span>&nbsp;or by reduction of Hg(II) to Hg</span><sup>0</sup><span>&nbsp;and subsequent evasion of Hg</span><sup>0</sup><span>. The diel variation in filtered methyl Hg could have been produced by sunlight- and temperature-dependent methylation. This study is the first to examine diel Hg cycling in streams, and its results reinforce previous conclusions that diel trace-element cycling in streams is widespread but often not recognized and that parts of the biogeochemical Hg cycle respond quickly to the daily photocycle.</span></p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Science of the Total Environment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.scitotenv.2006.11.008","issn":"00489697","usgsCitation":"Nimick, D.A., McCleskey, R.B., Gammons, C., Cleasby, T., and Parker, S., 2007, Diel mercury-concentration variations in streams affected by mining and geothermal discharge: Science of the Total Environment, v. 373, no. 1, p. 344-355, https://doi.org/10.1016/j.scitotenv.2006.11.008.","productDescription":"12 p.","startPage":"344","endPage":"355","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":242656,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214898,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.scitotenv.2006.11.008"}],"country":"United States","state":"Montana","otherGeospatial":"Silver Creek, Madison River","volume":"373","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a00c2e4b0c8380cd4f8da","contributors":{"authors":[{"text":"Nimick, David A. dnimick@usgs.gov","contributorId":421,"corporation":false,"usgs":true,"family":"Nimick","given":"David","email":"dnimick@usgs.gov","middleInitial":"A.","affiliations":[{"id":573,"text":"Special Applications Science Center","active":true,"usgs":true},{"id":5050,"text":"WY-MT Water Science Center","active":true,"usgs":true}],"preferred":true,"id":433903,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McCleskey, R. Blaine 0000-0002-2521-8052 rbmccles@usgs.gov","orcid":"https://orcid.org/0000-0002-2521-8052","contributorId":147399,"corporation":false,"usgs":true,"family":"McCleskey","given":"R.","email":"rbmccles@usgs.gov","middleInitial":"Blaine","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":503,"text":"Office of Water Quality","active":true,"usgs":true}],"preferred":true,"id":433901,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gammons, C.H.","contributorId":18459,"corporation":false,"usgs":true,"family":"Gammons","given":"C.H.","affiliations":[],"preferred":false,"id":433900,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cleasby, Tom 0000-0003-0694-1541 tcleasby@usgs.gov","orcid":"https://orcid.org/0000-0003-0694-1541","contributorId":1137,"corporation":false,"usgs":true,"family":"Cleasby","given":"Tom","email":"tcleasby@usgs.gov","affiliations":[{"id":5050,"text":"WY-MT Water Science Center","active":true,"usgs":true}],"preferred":false,"id":433904,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Parker, S.R.","contributorId":62725,"corporation":false,"usgs":true,"family":"Parker","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":433902,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031935,"text":"70031935 - 2007 - Geostatistical three-dimensional modeling of oolite shoals, St. Louis Limestone, southwest Kansas","interactions":[],"lastModifiedDate":"2012-03-12T17:21:26","indexId":"70031935","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":701,"text":"American Association of Petroleum Geologists Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Geostatistical three-dimensional modeling of oolite shoals, St. Louis Limestone, southwest Kansas","docAbstract":"In the Hugoton embayment of southwestern Kansas, reservoirs composed of relatively thin (<4 m; <13.1 ft) oolitic deposits within the St. Louis Limestone have produced more than 300 million bbl of oil. The geometry and distribution of oolitic deposits control the heterogeneity of the reservoirs, resulting in exploration challenges and relatively low recovery. Geostatistical three-dimensional (3-D) models were constructed to quantify the geometry and spatial distribution of oolitic reservoirs, and the continuity of flow units within Big Bow and Sand Arroyo Creek fields. Lithofacies in uncored wells were predicted from digital logs using a neural network. The tilting effect from the Laramide orogeny was removed to construct restored structural surfaces at the time of deposition. Well data and structural maps were integrated to build 3-D models of oolitic reservoirs using stochastic simulations with geometry data. Three-dimensional models provide insights into the distribution, the external and internal geometry of oolitic deposits, and the sedimentologic processes that generated reservoir intervals. The structural highs and general structural trend had a significant impact on the distribution and orientation of the oolitic complexes. The depositional pattern and connectivity analysis suggest an overall aggradation of shallow-marine deposits during pulses of relative sea level rise followed by deepening near the top of the St. Louis Limestone. Cemented oolitic deposits were modeled as barriers and baffles and tend to concentrate at the edge of oolitic complexes. Spatial distribution of porous oolitic deposits controls the internal geometry of rock properties. Integrated geostatistical modeling methods can be applicable to other complex carbonate or siliciclastic reservoirs in shallow-marine settings. Copyright ?? 2007. The American Association of Petroleum Geologists. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Association of Petroleum Geologists Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1306/08090605167","issn":"01491423","usgsCitation":"Qi, L., Carr, T., and Goldstein, R., 2007, Geostatistical three-dimensional modeling of oolite shoals, St. Louis Limestone, southwest Kansas: American Association of Petroleum Geologists Bulletin, v. 91, no. 1, p. 69-96, https://doi.org/10.1306/08090605167.","startPage":"69","endPage":"96","numberOfPages":"28","costCenters":[],"links":[{"id":214992,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1306/08090605167"},{"id":242754,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a28b3e4b0c8380cd5a326","contributors":{"authors":[{"text":"Qi, L.","contributorId":70986,"corporation":false,"usgs":true,"family":"Qi","given":"L.","email":"","affiliations":[],"preferred":false,"id":433789,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Carr, T.R.","contributorId":37094,"corporation":false,"usgs":true,"family":"Carr","given":"T.R.","email":"","affiliations":[],"preferred":false,"id":433788,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Goldstein, R.H.","contributorId":18908,"corporation":false,"usgs":true,"family":"Goldstein","given":"R.H.","affiliations":[],"preferred":false,"id":433787,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031933,"text":"70031933 - 2007 - Climate correlates of 20 years of trophic changes in a high-elevation riparian system","interactions":[],"lastModifiedDate":"2012-03-12T17:21:26","indexId":"70031933","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Climate correlates of 20 years of trophic changes in a high-elevation riparian system","docAbstract":"The consequences of climate change for ecosystem structure and function remain largely unknown. Here, I examine the ability of climate variation to explain long-term changes in bird and plant populations, as well as trophic interactions in a high-elevation riparian system in central Arizona, USA, based on 20 years of study. Abundances of dominant deciduous trees have declined dramatically over the 20 years, correlated with a decline in overwinter snowfall. Snowfall can affect overwinter presence of elk, whose browsing can significantly impact deciduous tree abundance. Thus, climate may affect the plant community indirectly through effects on herbivores, but may also act directly by influencing water availability for plants. Seven species of birds were found to initiate earlier breeding associated with an increase in spring temperature across years. The advance in breeding time did not affect starvation of young or clutch size. Earlier breeding also did not increase the length of the breeding season for single-brooded species, but did for multi-brooded species. Yet, none of these phenology-related changes was associated with bird population trends. Climate had much larger consequences for these seven bird species by affecting trophic levels below (plants) and above (predators) the birds. In particular, the climate-related declines in deciduous vegetation led to decreased abundance of preferred bird habitat and increased nest predation rates. In addition, summer precipitation declined over time, and drier summers also were further associated with greater nest predation in all species. The net result was local extinction and severe population declines in some previously common bird species, whereas one species increased strongly in abundance, and two species did not show clear population changes. These data indicate that climate can alter ecosystem structure and function through complex pathways that include direct and indirect effects on abundances and interactions of multiple trophic components. ?? 2007 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/0012-9658(2007)88[367:CCOYOT]2.0.CO;2","issn":"00129658","usgsCitation":"Martin, T.E., 2007, Climate correlates of 20 years of trophic changes in a high-elevation riparian system: Ecology, v. 88, no. 2, p. 367-380, https://doi.org/10.1890/0012-9658(2007)88[367:CCOYOT]2.0.CO;2.","startPage":"367","endPage":"380","numberOfPages":"14","costCenters":[],"links":[{"id":214926,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/0012-9658(2007)88[367:CCOYOT]2.0.CO;2"},{"id":242686,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"88","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f650e4b0c8380cd4c6ad","contributors":{"authors":[{"text":"Martin, T. E.","contributorId":10911,"corporation":false,"usgs":true,"family":"Martin","given":"T.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":433782,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70031932,"text":"70031932 - 2007 - Impact of prescribed fire and other factors on cheatgrass persistence in a Sierra Nevada ponderosa pine forest","interactions":[],"lastModifiedDate":"2023-10-03T11:13:57.860447","indexId":"70031932","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2083,"text":"International Journal of Wildland Fire","active":true,"publicationSubtype":{"id":10}},"title":"Impact of prescribed fire and other factors on cheatgrass persistence in a Sierra Nevada ponderosa pine forest","docAbstract":"<p>Following the reintroduction of fire Bromus tectorum has invaded the low elevation ponderosa pine forests in parts of Kings Canyon National Park, California. We used prescribed burns, other field manipulations, germination studies, and structural equation modelling, to investigate how fire and other factors affect the persistence of cheatgrass in these forests. Our studies show that altering burning season to coincide with seed maturation is not likely to control cheatgrass because sparse fuel loads generate low fire intensity. Increasing time between prescribed fires may inhibit cheatgrass by increasing surface fuels (both herbaceous and litter), which directly inhibit cheatgrass establishment, and by creating higher intensity fires capable of killing a much greater fraction of the seed bank. Using structural equation modelling, postfire cheatgrass dominance was shown to be most strongly controlled by the prefire cheatgrass seedbank; other factors include soil moisture, fire intensity, soil N, and duration of direct sunlight. Current fire management goals in western conifer forests are focused on restoring historical fire regimes; however, these frequent fire regimes may enhance alien plant invasion in some forest types. Where feasible, fire managers should consider the option of an appropriate compromise between reducing serious fire hazards and exacerbating alien plant invasions.&nbsp;</p>","language":"English","publisher":"CSIRO","doi":"10.1071/WF06052","issn":"10498001","usgsCitation":"Keeley, J., and McGinnis, T., 2007, Impact of prescribed fire and other factors on cheatgrass persistence in a Sierra Nevada ponderosa pine forest: International Journal of Wildland Fire, v. 16, no. 1, p. 96-106, https://doi.org/10.1071/WF06052.","productDescription":"11 p.","startPage":"96","endPage":"106","numberOfPages":"11","costCenters":[],"links":[{"id":242685,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a38c4e4b0c8380cd616ad","contributors":{"authors":[{"text":"Keeley, Jon E. 0000-0002-4564-6521","orcid":"https://orcid.org/0000-0002-4564-6521","contributorId":69082,"corporation":false,"usgs":true,"family":"Keeley","given":"Jon E.","affiliations":[],"preferred":false,"id":433781,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McGinnis, T.W.","contributorId":30949,"corporation":false,"usgs":true,"family":"McGinnis","given":"T.W.","email":"","affiliations":[],"preferred":false,"id":433780,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031931,"text":"70031931 - 2007 - The Russell gold deposit, Carolina Slate Belt, North Carolina","interactions":[],"lastModifiedDate":"2012-03-12T17:21:26","indexId":"70031931","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"The Russell gold deposit, Carolina Slate Belt, North Carolina","docAbstract":"Gold deposits have been mined in the Carolina slate belt from the early 1800s to recent times, with most of the production from large mines in South Carolina. The Russell mine, one of the larger producers in North Carolina, is located in the central Uwharrie Mountains, and produced over 470 kg of gold. Ore grades averaged about 3.4 grams per tonne (g/ t), with higher-grade zones reported. The Russell deposit is interpreted to be a sediment-hosted, gold-rich, base-metal poor, volcanogenic massive sulfide deposit in which gold was remobilized, in part, during Ordovician metamorphism. The ore was deposited syngenetically with laminated siltstones of the late Proterozoic Tillery Formation that have been metamorphosed to a lower greenschist facies. The Tillery Formation regionally overlies subaerial to shallow marine rhyolitic volcanic and volcaniclastic rocks of the Uwharrie Formation and underlies the marine volcanic and sedimentary rocks of the Cid Formation. Recent mapping has shown that a rhyolitic dome near the Russell mine was extruded during the deposition of the lower part of the Tillery Formation, at about the same time as ore deposition. Relict mafic, rock fragments present in the ore zones suggest contemporaneous bimodal (rhyolite-basalt) volcanism. The maximum formation age of the Russell deposit is younger than 558 Ma, which is similar to that of the larger, well known Brewer, Haile, and Ridgeway deposits of South Carolina. Gold was mined from at least six zones that are parallel to the regional metamorphic foliation. These strongly deformed zones consist of northeast-trending folds, high-angle reverse faults, and asymmetric doubly plunging folds overturned to the southeast. The dominant structure at the mine is an asymmetric doubly plunging anticline with the axis trending N 45?? E, probably related to late Ordovician (456 ?? 2 Ma) regional metamorphism and deformation. Two stages of pyrite growth are recognized. Stage 1, primary, spongy pyrite, is present in thin massive sulfide layers parallel to bedding and intergrown with pyrrhotite, chalcopyrite, sphalerite, and sparse arsenopyrite. Stage 2, secondary pyrite, is present as euhedral, idiomorphic rims on spongy pyrite and as veinlets that parallel the regional foliation. Stage 1 pyrite was deposited syngenetically or diagenetically during or soon after sedimentation. Stage 2 pyrite overgrowths and veins resulted from recrystallization or remobilization of stage 1 pyrite, probably during deformation related to Ordovician regional metamorphism. It is proposed that the spongy texture of the stage 1 pyrite represents nucleation and growth of pyrite on organic matter, possibly of bacterial origin. Other textures, such as geometric voids in spongy pyrite, As-rich zones surrounding central voids, 60-??m ring structures composed of spongy pyrite, and layers of spongy pyrite interlayered with bedding laminations, also appear to indicate replacement of organic matter by pyrite. Stage 1 pyrite contains up to 0.06 wt percent gold. The ??34S values of pyrite in and near pyritic ore (3.5-4.5???), in the rhyolite dome (5.1-5.4???) and in the Tillery Formation (5.9-6.2???) are interpreted to reflect mixing of sulfur derived from igneous and seawater sources. Whole-rock ??18O values of nearby unaltered mudstone are about 11 per mil whereas those from altered mudstone at the deposit are 7.4 to 10.6 per mil. The lower ?? 18O values are interpreted to indicate possible high-temperature exchange between relatively low ??18O hydrothermal fluids and the wall rocks. Gold, As, K, and Mo are enriched relative to the regional background in both the ore zones and in pyrite veins and disseminations in the nearby rhyolite dome, suggesting a possible genetic link between the rhyolitic volcanism and the gold mineralization. ?? 2007 Society of Economic Geologists, Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Economic Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/gsecongeo.102.2.239","issn":"03610128","usgsCitation":"Klein, T.L., Cunningham, C.G., Logan, M., and Seal, R., 2007, The Russell gold deposit, Carolina Slate Belt, North Carolina: Economic Geology, v. 102, no. 2, p. 239-256, https://doi.org/10.2113/gsecongeo.102.2.239.","startPage":"239","endPage":"256","numberOfPages":"18","costCenters":[],"links":[{"id":214897,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gsecongeo.102.2.239"},{"id":242655,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"102","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba8c3e4b08c986b321e2f","contributors":{"authors":[{"text":"Klein, T. L.","contributorId":76322,"corporation":false,"usgs":true,"family":"Klein","given":"T.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":433776,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cunningham, C. G.","contributorId":76741,"corporation":false,"usgs":true,"family":"Cunningham","given":"C.","middleInitial":"G.","affiliations":[],"preferred":false,"id":433777,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Logan, M.A.V.","contributorId":96106,"corporation":false,"usgs":true,"family":"Logan","given":"M.A.V.","email":"","affiliations":[],"preferred":false,"id":433778,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Seal, R.R. II","contributorId":102097,"corporation":false,"usgs":true,"family":"Seal","given":"R.R.","suffix":"II","email":"","affiliations":[],"preferred":false,"id":433779,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031903,"text":"70031903 - 2007 - A new species of Tallaperla (Plecoptera: Peltoperlidae) from North Carolina, U.S.A.","interactions":[],"lastModifiedDate":"2012-03-12T17:21:26","indexId":"70031903","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1520,"text":"Entomological News","active":true,"publicationSubtype":{"id":10}},"title":"A new species of Tallaperla (Plecoptera: Peltoperlidae) from North Carolina, U.S.A.","docAbstract":"A new species of Tallaperla, T. maiyae, is described from Wilkes County, North Carolina, U.S.A. from two males. The new species is similar to T. maria and T. anna, but can be distinguished by the combination of a prominent spine-like epiproct and brown coloration.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Entomological News","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.3157/0013-872X(2007)118[81:ANSOTP]2.0.CO;2","issn":"0013872X","usgsCitation":"Kondratieff, B., Kirchner, R., Zuellig, R., and Lenat, D.R., 2007, A new species of Tallaperla (Plecoptera: Peltoperlidae) from North Carolina, U.S.A.: Entomological News, v. 118, no. 1, p. 81-82, https://doi.org/10.3157/0013-872X(2007)118[81:ANSOTP]2.0.CO;2.","startPage":"81","endPage":"82","numberOfPages":"2","costCenters":[],"links":[{"id":477177,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://www.biodiversitylibrary.org/part/49757","text":"External Repository"},{"id":214990,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3157/0013-872X(2007)118[81:ANSOTP]2.0.CO;2"},{"id":242752,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"118","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e4b4e4b0c8380cd46870","contributors":{"authors":[{"text":"Kondratieff, B.C.","contributorId":103230,"corporation":false,"usgs":true,"family":"Kondratieff","given":"B.C.","email":"","affiliations":[],"preferred":false,"id":433657,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kirchner, R.F.","contributorId":31096,"corporation":false,"usgs":true,"family":"Kirchner","given":"R.F.","email":"","affiliations":[],"preferred":false,"id":433655,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zuellig, R.E.","contributorId":37045,"corporation":false,"usgs":true,"family":"Zuellig","given":"R.E.","affiliations":[],"preferred":false,"id":433656,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lenat, D. R.","contributorId":29478,"corporation":false,"usgs":true,"family":"Lenat","given":"D.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":433654,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031902,"text":"70031902 - 2007 - Improving the accuracy of sediment-associated constituent concentrations in whole storm water samples by wet-sieving","interactions":[],"lastModifiedDate":"2012-03-12T17:21:26","indexId":"70031902","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2262,"text":"Journal of Environmental Quality","active":true,"publicationSubtype":{"id":10}},"title":"Improving the accuracy of sediment-associated constituent concentrations in whole storm water samples by wet-sieving","docAbstract":"Sand-sized particles (>63 ??m) in whole storm water samples collected from urban runoff have the potential to produce data with substantial bias and/or poor precision both during sample splitting and laboratory analysis. New techniques were evaluated in an effort to overcome some of the limitations associated with sample splitting and analyzing whole storm water samples containing sand-sized particles. Wet-sieving separates sand-sized particles from a whole storm water sample. Once separated, both the sieved solids and the remaining aqueous (water suspension of particles less than 63 ??m) samples were analyzed for total recoverable metals using a modification of USEPA Method 200.7. The modified version digests the entire sample, rather than an aliquot, of the sample. Using a total recoverable acid digestion on the entire contents of the sieved solid and aqueous samples improved the accuracy of the derived sediment-associated constituent concentrations. Concentration values of sieved solid and aqueous samples can later be summed to determine an event mean concentration. ?? ASA, CSSA, SSSA.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Environmental Quality","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2134/jeq2006.0147","issn":"00472425","usgsCitation":"Selbig, W., Bannerman, R., and Bowman, G., 2007, Improving the accuracy of sediment-associated constituent concentrations in whole storm water samples by wet-sieving: Journal of Environmental Quality, v. 36, no. 1, p. 226-232, https://doi.org/10.2134/jeq2006.0147.","startPage":"226","endPage":"232","numberOfPages":"7","costCenters":[],"links":[{"id":214989,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2134/jeq2006.0147"},{"id":242751,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"36","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a397ee4b0c8380cd61939","contributors":{"authors":[{"text":"Selbig, W.R.","contributorId":102106,"corporation":false,"usgs":true,"family":"Selbig","given":"W.R.","email":"","affiliations":[],"preferred":false,"id":433653,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bannerman, R.","contributorId":95657,"corporation":false,"usgs":true,"family":"Bannerman","given":"R.","email":"","affiliations":[],"preferred":false,"id":433652,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bowman, G.","contributorId":49999,"corporation":false,"usgs":true,"family":"Bowman","given":"G.","email":"","affiliations":[],"preferred":false,"id":433651,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031900,"text":"70031900 - 2007 - Thermal infrared reflectance and emission spectroscopy of quartzofeldspathic glasses","interactions":[],"lastModifiedDate":"2012-03-12T17:21:26","indexId":"70031900","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Thermal infrared reflectance and emission spectroscopy of quartzofeldspathic glasses","docAbstract":"This investigation seeks to better understand the thermal infrared (TIR) spectral characteristics of naturally-occurring amorphous materials through laboratory synthesis and analysis of glasses. Because spectra of glass phases differ markedly from their mineral counterparts, examination of glasses is important to accurately determine the composition of amorphous surface materials using remote sensing datasets. Quantitatively characterizing TIR (5-25 ??m) spectral changes that accompany structural changes between glasses and mineral crystals provides the means to understand natural glasses on Earth and Mars. A suite of glasses with compositions analogous to common terrestrial volcanic glasses was created and analyzed using TIR reflectance and emission techniques. Documented spectral characteristics provide a basis for comparison with TIR spectra of other amorphous materials (glasses, clays, etc.). Our results provide the means to better detect and characterize glasses associated with terrestrial volcanoes, as well as contribute toward understanding the nature of amorphous silicates detected on Mars. Copyright 2007 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Research Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2006GL027893","issn":"00948276","usgsCitation":"Byrnes, J., Ramsey, M., King, P., and Lee, R., 2007, Thermal infrared reflectance and emission spectroscopy of quartzofeldspathic glasses: Geophysical Research Letters, v. 34, no. 1, https://doi.org/10.1029/2006GL027893.","costCenters":[],"links":[{"id":477174,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006gl027893","text":"Publisher Index Page"},{"id":214956,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2006GL027893"},{"id":242718,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"34","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-10","publicationStatus":"PW","scienceBaseUri":"505bb22ce4b08c986b325647","contributors":{"authors":[{"text":"Byrnes, J.M.","contributorId":64049,"corporation":false,"usgs":true,"family":"Byrnes","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":433643,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ramsey, M.S.","contributorId":66475,"corporation":false,"usgs":true,"family":"Ramsey","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":433645,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"King, P.L.","contributorId":20996,"corporation":false,"usgs":true,"family":"King","given":"P.L.","email":"","affiliations":[],"preferred":false,"id":433642,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lee, R.J.","contributorId":65294,"corporation":false,"usgs":true,"family":"Lee","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":433644,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031898,"text":"70031898 - 2007 - Conditions for coexistence of freshwater mussel species via partitioning of fish host resources","interactions":[],"lastModifiedDate":"2012-03-12T17:21:25","indexId":"70031898","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1458,"text":"Ecological Modelling","active":true,"publicationSubtype":{"id":10}},"title":"Conditions for coexistence of freshwater mussel species via partitioning of fish host resources","docAbstract":"Riverine freshwater mussel species can be found in highly diverse communities where many similar species coexist. Mussel species potentially compete for food and space as adults, and for fish host resources during the larval (glochidial) stage. Resource partitioning at the larval stage may promote coexistence. A model of resource utilization was developed for two mussel species and analyzed to determine conditions for coexistence. Mussel species were predicted to coexist when they differed in terms of their success in contacting different fish host species; very similar strategies offered limited possibilities for coexistence. Differences in the mussel species' maximum infestation loads on the fish hosts that coincided with differences in their fish host contact success promoted coexistence. Mussel species with a given set of trade-offs in fish host use were predicted to coexist only for a subset of relative fish host abundances, so a shift in relative fish host abundances could result in the loss of a mussel species. An understanding of the conditions for freshwater mussel species coexistence can help explain high mussel diversity in rivers and guide ongoing conservation activities. ?? 2006 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Modelling","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.ecolmodel.2006.09.009","issn":"03043800","usgsCitation":"Rashleigh, B., and DeAngelis, D., 2007, Conditions for coexistence of freshwater mussel species via partitioning of fish host resources: Ecological Modelling, v. 201, no. 2, p. 171-178, https://doi.org/10.1016/j.ecolmodel.2006.09.009.","startPage":"171","endPage":"178","numberOfPages":"8","costCenters":[],"links":[{"id":214923,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecolmodel.2006.09.009"},{"id":242683,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"201","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f9b5e4b0c8380cd4d73f","contributors":{"authors":[{"text":"Rashleigh, Brenda","contributorId":43990,"corporation":false,"usgs":true,"family":"Rashleigh","given":"Brenda","affiliations":[],"preferred":false,"id":433638,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"DeAngelis, D.L. 0000-0002-1570-4057","orcid":"https://orcid.org/0000-0002-1570-4057","contributorId":32470,"corporation":false,"usgs":true,"family":"DeAngelis","given":"D.L.","affiliations":[],"preferred":false,"id":433637,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031897,"text":"70031897 - 2007 - Nitrate retention in riparian ground water at natural and elevated nitrate levels in North Central Minnesota","interactions":[],"lastModifiedDate":"2023-08-29T11:32:04.96046","indexId":"70031897","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2262,"text":"Journal of Environmental Quality","active":true,"publicationSubtype":{"id":10}},"title":"Nitrate retention in riparian ground water at natural and elevated nitrate levels in North Central Minnesota","docAbstract":"<p>The relationship between local ground water flows and NO3− transport to the channel was examined in three well transects from a natural, wooded riparian zone adjacent to the Shingobee River, MN. The hillslope ground water originated as recharge from intermittently grazed pasture up slope of the site. In the hillslope transect perpendicular to the stream, ground water NO3− concentrations decreased from ∼3 mg N L−1 beneath the ridge (80 m from the channel) to 0.01 to 1.0 mg N L−1 at wells 1 to 3 m from the channel. The Cl− concentrations and NO3/Cl ratios decreased toward the channel indicating NO3− dilution and biotic retention. In the bankside well transect parallel to the stream, two distinct ground water environments were observed: an alluvial environment upstream of a relict beaver dam influenced by stream water and a hillslope environment downstream of the relict beaver dam. Nitrate was elevated to levels representative of agricultural runoff in a third well transect located ∼5 m from the stream to assess the effectiveness of the riparian zone as a NO3− sink. Subsurface NO3− injections revealed transport of up to 15 mg N L−1 was nearly conservative in the alluvial riparian environment. Addition of glucose stimulated dissolved oxygen uptake and promoted NO3− retention under both background and elevated NO3− levels in summer and winter. Disappearance of added NO3− was followed by transient NO2− formation and, in the presence of C2H2, by N2O formation, demonstrating potential denitrification. Under current land use, most NO3− associated with local ground water is biotically retained or diluted before reaching the channel. However, elevating NO3− levels through agricultural cultivation would likely result in increased NO3− transport to the channel.</p>","language":"English","publisher":"Wiley","doi":"10.2134/jeq2006.0019","issn":"00472425","usgsCitation":"Duff, J., Jackman, A.P., Triska, F., Sheibley, R., and Avanzino, R., 2007, Nitrate retention in riparian ground water at natural and elevated nitrate levels in North Central Minnesota: Journal of Environmental Quality, v. 36, no. 2, p. 343-353, https://doi.org/10.2134/jeq2006.0019.","productDescription":"11 p.","startPage":"343","endPage":"353","numberOfPages":"11","costCenters":[],"links":[{"id":242654,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Minnesota","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -95.04098355965877,\n              47.16920731114888\n            ],\n            [\n              -95.04098355965877,\n              46.842187352721595\n            ],\n            [\n              -94.43040152655558,\n              46.842187352721595\n            ],\n            [\n              -94.43040152655558,\n              47.16920731114888\n            ],\n            [\n              -95.04098355965877,\n              47.16920731114888\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"36","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a66afe4b0c8380cd72f11","contributors":{"authors":[{"text":"Duff, J.H.","contributorId":60377,"corporation":false,"usgs":true,"family":"Duff","given":"J.H.","email":"","affiliations":[],"preferred":false,"id":433635,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jackman, A. P.","contributorId":46957,"corporation":false,"usgs":true,"family":"Jackman","given":"A.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":433634,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Triska, F.J.","contributorId":69560,"corporation":false,"usgs":true,"family":"Triska","given":"F.J.","email":"","affiliations":[],"preferred":false,"id":433636,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sheibley, R.W. 0000-0003-1627-8536 sheibley@usgs.gov","orcid":"https://orcid.org/0000-0003-1627-8536","contributorId":43066,"corporation":false,"usgs":true,"family":"Sheibley","given":"R.W.","email":"sheibley@usgs.gov","affiliations":[],"preferred":false,"id":433633,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Avanzino, R.J.","contributorId":37336,"corporation":false,"usgs":true,"family":"Avanzino","given":"R.J.","affiliations":[],"preferred":false,"id":433632,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031870,"text":"70031870 - 2007 - Uncertainty in age-specific harvest estimates and consequences for white-tailed deer management","interactions":[],"lastModifiedDate":"2012-03-12T17:21:25","indexId":"70031870","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1458,"text":"Ecological Modelling","active":true,"publicationSubtype":{"id":10}},"title":"Uncertainty in age-specific harvest estimates and consequences for white-tailed deer management","docAbstract":"Age structure proportions (proportion of harvested individuals within each age class) are commonly used as support for regulatory restrictions and input for deer population models. Such use requires critical evaluation when harvest regulations force hunters to selectively harvest specific age classes, due to impact on the underlying population age structure. We used a stochastic population simulation model to evaluate the impact of using harvest proportions to evaluate changes in population age structure under a selective harvest management program at two scales. Using harvest proportions to parameterize the age-specific harvest segment of the model for the local scale showed that predictions of post-harvest age structure did not vary dependent upon whether selective harvest criteria were in use or not. At the county scale, yearling frequency in the post-harvest population increased, but model predictions indicated that post-harvest population size of 2.5 years old males would decline below levels found before implementation of the antler restriction, reducing the number of individuals recruited into older age classes. Across the range of age-specific harvest rates modeled, our simulation predicted that underestimation of age-specific harvest rates has considerable influence on predictions of post-harvest population age structure. We found that the consequence of uncertainty in harvest rates corresponds to uncertainty in predictions of residual population structure, and this correspondence is proportional to scale. Our simulations also indicate that regardless of use of harvest proportions or harvest rates, at either the local or county scale the modeled SHC had a high probability (>0.60 and >0.75, respectively) of eliminating recruitment into >2.5 years old age classes. Although frequently used to increase population age structure, our modeling indicated that selective harvest criteria can decrease or eliminate the number of white-tailed deer recruited into older age classes. Thus, we suggest that using harvest proportions for management planning and evaluation should be viewed with caution. In addition, we recommend that managers focus more attention on estimation of age-specific harvest rates, and modeling approaches which combine harvest rates with information from harvested individuals to further increase their ability to effectively manage deer populations under selective harvest programs. ?? 2006 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Modelling","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.ecolmodel.2006.09.017","issn":"03043800","usgsCitation":"Collier, B., and Krementz, D., 2007, Uncertainty in age-specific harvest estimates and consequences for white-tailed deer management: Ecological Modelling, v. 201, no. 2, p. 194-204, https://doi.org/10.1016/j.ecolmodel.2006.09.017.","startPage":"194","endPage":"204","numberOfPages":"11","costCenters":[],"links":[{"id":215046,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecolmodel.2006.09.017"},{"id":242815,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"201","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bbc21e4b08c986b328a4f","contributors":{"authors":[{"text":"Collier, B.A.","contributorId":107121,"corporation":false,"usgs":true,"family":"Collier","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":433513,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Krementz, D.G.","contributorId":74332,"corporation":false,"usgs":true,"family":"Krementz","given":"D.G.","affiliations":[],"preferred":false,"id":433512,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031869,"text":"70031869 - 2007 - Characteristics of roost sites used by burrowing owls (Athene cunicularia) wintering in Southern Texas","interactions":[],"lastModifiedDate":"2016-06-03T15:36:22","indexId":"70031869","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3451,"text":"Southwestern Naturalist","active":true,"publicationSubtype":{"id":10}},"title":"Characteristics of roost sites used by burrowing owls (Athene cunicularia) wintering in Southern Texas","docAbstract":"<p>The western burrowing owl (Athene cunicularia hypugaea) is threatened in Mexico, endangered in Canada, and declining in most of the western United States. Most previous research has focused on burrowing owl breeding biology, and little is known about its winter ecology. We determined characteristics of roost sites used by western burrowing owls in southern Texas during winter. Data on 46 winter roost sites were collected from 15 November 2001 to 15 February 2002. Of these roost sites, 87% were located on agricultural land, 80% were along roads, and 74% were concrete, steel, or cast-iron culverts. Mean diameter (??SE) of roost site openings was 22 ?? 1.5 cm. Most roost sites (70%) were located on inaccessible private lands. Bare ground comprised 61% of ground cover within a 10-m radius of roost sites. We recommend that landowners and public-land managers should be encouraged to use smaller-diameter culverts when building roads or replacing old or damaged culverts and to graze livestock or mow around these culverts during winter.</p>","language":"English","publisher":"Bioone","doi":"10.1894/0038-4909(2007)52[60:CORSUB]2.0.CO;2","issn":"00384909","usgsCitation":"Williford, D., Woodin, M., Skoruppa, M., and Hickman, G., 2007, Characteristics of roost sites used by burrowing owls (Athene cunicularia) wintering in Southern Texas: Southwestern Naturalist, v. 52, no. 1, p. 60-66, https://doi.org/10.1894/0038-4909(2007)52[60:CORSUB]2.0.CO;2.","productDescription":"7 p.","startPage":"60","endPage":"66","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"links":[{"id":242785,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215020,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1894/0038-4909(2007)52[60:CORSUB]2.0.CO;2"}],"country":"United States","state":"Texas","county":"Jim Wells, Kleberg, Nueces, Refugio, San Patricio","otherGeospatial":"Texas coastal bend of southern Texas","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -95.592041015625,\n              28.806173508854776\n            ],\n            [\n              -96.52587890625,\n              29.252855985973763\n            ],\n            [\n              -97.8607177734375,\n              28.57487404744697\n            ],\n            [\n              -98.3551025390625,\n              27.97499795326776\n            ],\n            [\n              -98.54187011718749,\n              27.11292342871368\n            ],\n            [\n              -98.4759521484375,\n              26.667095801104814\n            ],\n            [\n              -97.44873046875,\n              26.58361481358588\n            ],\n            [\n              -95.592041015625,\n              28.806173508854776\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"52","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f49de4b0c8380cd4be08","contributors":{"authors":[{"text":"Williford, D.L.","contributorId":28870,"corporation":false,"usgs":true,"family":"Williford","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":433509,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Woodin, M.C.","contributorId":97307,"corporation":false,"usgs":true,"family":"Woodin","given":"M.C.","email":"","affiliations":[],"preferred":false,"id":433511,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Skoruppa, M.K.","contributorId":39189,"corporation":false,"usgs":true,"family":"Skoruppa","given":"M.K.","affiliations":[],"preferred":false,"id":433510,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hickman, G.C.","contributorId":15823,"corporation":false,"usgs":true,"family":"Hickman","given":"G.C.","email":"","affiliations":[],"preferred":false,"id":433508,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031687,"text":"70031687 - 2007 - Nutrient (N, P) loads and yields at multiple scales and subbasin types in the Yukon River basin, Alaska","interactions":[],"lastModifiedDate":"2018-01-30T19:37:24","indexId":"70031687","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2319,"text":"Journal of Geophysical Research G: Biogeosciences","active":true,"publicationSubtype":{"id":10}},"title":"Nutrient (N, P) loads and yields at multiple scales and subbasin types in the Yukon River basin, Alaska","docAbstract":"Loads and yields of dissolved and particulate nitrogen (N) and phosphorus (P) were measured and modeled at three locations on the Yukon River (YR) and on the Tanana and Porcupine Rivers in Alaska during 2001-2005. Total export of N and P upstream of Yukon Delta averaged 120 Gg N a-1 and 56 Gg P a-1, respectively, with 43.5% of total N (TN) as dissolved organic N, and 98% of total P (TP) as particulate phosphorus. Approximately half of the annual export of TN and TP occurred during spring. Hydrologic yields ofTN (5.6-13.3 mmol N m-2 a-1) and TP (0.8-9.0 mmol P m-2 a-1) were least in the Porcupine basin and greatest in the Tanana basin and were proportional to water yield. Comparison of current and historical dissolved organic matter (DOM) export from the basin indicates decreased DON export with respect to total water discharge during summer and autumn in recent decades. Any possible climate-related change in annual water discharge will result in proportional changes in N and P export.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research G: Biogeosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2006JG000366","issn":"01480227","usgsCitation":"Dornblaser, M., and Striegl, R.G., 2007, Nutrient (N, P) loads and yields at multiple scales and subbasin types in the Yukon River basin, Alaska: Journal of Geophysical Research G: Biogeosciences, v. 112, no. 4, https://doi.org/10.1029/2006JG000366.","costCenters":[],"links":[{"id":477148,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006jg000366","text":"Publisher Index Page"},{"id":239837,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212364,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2006JG000366"}],"volume":"112","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-11-03","publicationStatus":"PW","scienceBaseUri":"505a6937e4b0c8380cd73c09","contributors":{"authors":[{"text":"Dornblaser, M.M.","contributorId":38765,"corporation":false,"usgs":true,"family":"Dornblaser","given":"M.M.","email":"","affiliations":[],"preferred":false,"id":432695,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Striegl, Robert G. 0000-0002-8251-4659 rstriegl@usgs.gov","orcid":"https://orcid.org/0000-0002-8251-4659","contributorId":1630,"corporation":false,"usgs":true,"family":"Striegl","given":"Robert","email":"rstriegl@usgs.gov","middleInitial":"G.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"preferred":false,"id":432696,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031686,"text":"70031686 - 2007 - Geologic characteristics of the central stretch of the Ticona Channel, north-central Illinois","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031686","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1541,"text":"Environmental Geosciences","active":true,"publicationSubtype":{"id":10}},"title":"Geologic characteristics of the central stretch of the Ticona Channel, north-central Illinois","docAbstract":"The Ticona Channel is located in north-central Illinois and occurs in Grundy, LaSalle, and Putnam counties. It is a buried bedrock valley that served as the principal paleodrainage system in north-central Illinois during the Illinoian and pre-Illinoian. This study focused on the part of the Ticona Channel within the Leonore 7.5??? Quadrangle. The geometry and stratigraphy of sediments that fill the Ticona Channel were investigated using high-resolution, shallow seismic reflection profiling, traditional field geologic mapping techniques, borehole data, and water-well-log data. The valley is about 2 km (1 mi) wide and approximately 60 m (200 ft) deep. The U-shape channel is straight, trends east-west, and has only one mappable tributary. The valley is carved into the Pennsylvanian Carbondale Formation in the eastern part of the study area; it has incised into the Ordovician Prairie du Chien Group in the west. At its base, the Ticona Channel is filled with the Pearl Formation, which is coarse-grained sand and gravel that was deposited during the Illinoian glaciation. The Pearl Formation is overlain by Illinoian till of the Glasford Formation and is capped by Wedron Group sediments from the Wisconsinan stage. Copyright ?? 2007. The American Association of Petroleum Geologists/Division of Environmental Geosciences. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Geosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1306/eg.05030606002","issn":"10759565","usgsCitation":"Willems, B., Malone, D., and Pugin, A., 2007, Geologic characteristics of the central stretch of the Ticona Channel, north-central Illinois: Environmental Geosciences, v. 14, no. 3, p. 123-136, https://doi.org/10.1306/eg.05030606002.","startPage":"123","endPage":"136","numberOfPages":"14","costCenters":[],"links":[{"id":212363,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1306/eg.05030606002"},{"id":239836,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"14","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1935e4b0c8380cd558e9","contributors":{"authors":[{"text":"Willems, B.A.","contributorId":78208,"corporation":false,"usgs":true,"family":"Willems","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":432693,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Malone, D.H.","contributorId":92124,"corporation":false,"usgs":true,"family":"Malone","given":"D.H.","email":"","affiliations":[],"preferred":false,"id":432694,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pugin, A.","contributorId":10953,"corporation":false,"usgs":true,"family":"Pugin","given":"A.","affiliations":[],"preferred":false,"id":432692,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031684,"text":"70031684 - 2007 - Frequent transmission of immunodeficiency viruses among bobcats and pumas","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031684","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2497,"text":"Journal of Virology","active":true,"publicationSubtype":{"id":10}},"title":"Frequent transmission of immunodeficiency viruses among bobcats and pumas","docAbstract":"With the exception of human immunodeficiency virus (HIV), which emerged in humans after cross-species transmissions of simian immunodeficiency viruses from nonhuman primates, immunodeficiency viruses of the family Lentiviridae represent species-specific viruses that rarely cross species barriers to infect new hosts. Among the Felidae, numerous immunodeficiency-like lentiviruses have been documented, but only a few cross-species transmissions have been recorded, and these have not been perpetuated in the recipient species. Lentivirus seroprevalence was determined for 79 bobcats (Lynx rufus) and 31 pumas (Puma concolor) from well-defined populations in Southern California. Partial genomic sequences were subsequently obtained from 18 and 12 seropositive bobcats and pumas, respectively. Genotypes were analyzed for phylogenic relatedness and genotypic composition among the study set and archived feline lentivirus sequences. This investigation of feline immunodeficiency virus infection in bobcats and pumas of Southern California provides evidence that cross-species infection has occurred frequently among these animals. The data suggest that transmission has occurred in multiple locations and are most consistent with the spread of the virus from bobcats to pumas. Although the ultimate causes remain unknown, these transmission events may occur as a result of puma predation on bobcats, a situation similar to that which fostered transmission of HIV to humans, and likely represent the emergence of a lentivirus with relaxed barriers to cross-species transmission. This unusual observation provides a valuable opportunity to evaluate the ecological, behavioral, and molecular conditions that favor repeated transmissions and persistence of lentivirus between species. Copyright ?? 2007, American Society for Microbiology. All Rights Reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Virology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1128/JVI.00997-07","issn":"0022538X","usgsCitation":"Franklin, S., Troyer, J., TerWee, J., Lyren, L., Boyce, W., Riley, S., Roelke, M., Crooks, K., and VandeWoude, S., 2007, Frequent transmission of immunodeficiency viruses among bobcats and pumas: Journal of Virology, v. 81, no. 20, p. 10961-10969, https://doi.org/10.1128/JVI.00997-07.","startPage":"10961","endPage":"10969","numberOfPages":"9","costCenters":[],"links":[{"id":477142,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://www.ncbi.nlm.nih.gov/pmc/articles/2045550","text":"External Repository"},{"id":212336,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1128/JVI.00997-07"},{"id":239804,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"81","issue":"20","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a13d8e4b0c8380cd547df","contributors":{"authors":[{"text":"Franklin, S.P.","contributorId":87368,"corporation":false,"usgs":true,"family":"Franklin","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":432684,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Troyer, J.L.","contributorId":10224,"corporation":false,"usgs":true,"family":"Troyer","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":432676,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"TerWee, J.A.","contributorId":76133,"corporation":false,"usgs":true,"family":"TerWee","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":432681,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lyren, L.M.","contributorId":11983,"corporation":false,"usgs":true,"family":"Lyren","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":432677,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Boyce, W.M.","contributorId":12266,"corporation":false,"usgs":true,"family":"Boyce","given":"W.M.","email":"","affiliations":[],"preferred":false,"id":432678,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Riley, S.P.D.","contributorId":86157,"corporation":false,"usgs":true,"family":"Riley","given":"S.P.D.","email":"","affiliations":[],"preferred":false,"id":432683,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Roelke, M.E.","contributorId":48931,"corporation":false,"usgs":true,"family":"Roelke","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":432679,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Crooks, K.R.","contributorId":81679,"corporation":false,"usgs":true,"family":"Crooks","given":"K.R.","email":"","affiliations":[],"preferred":false,"id":432682,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"VandeWoude, S.","contributorId":74953,"corporation":false,"usgs":true,"family":"VandeWoude","given":"S.","affiliations":[],"preferred":false,"id":432680,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70175347,"text":"70175347 - 2007 - Spatial and temporal structure of macroinvertebrate assemblages, San Francisco Bay salt ponds","interactions":[],"lastModifiedDate":"2016-08-05T13:14:57","indexId":"70175347","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Spatial and temporal structure of macroinvertebrate assemblages, San Francisco Bay salt ponds","docAbstract":"<p>No abstract available.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Society of Wetland Scientists International Conference","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"Society of Wetland Scientists International Conference","conferenceDate":"June 2007","conferenceLocation":"Sacramento, CA","language":"English","publisher":"Society of Wetland Scientists","usgsCitation":"Miles, A., Spring, S., Ricca, M., Takekawa, J., Athearn, N., and Schoellhamer, D., 2007, Spatial and temporal structure of macroinvertebrate assemblages, San Francisco Bay salt ponds, <i>in</i> Society of Wetland Scientists International Conference, Sacramento, CA, June 2007, p. 51-51.","productDescription":"1 p.","startPage":"51","endPage":"51","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":326141,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57a5b8dae4b0ebae89b78a45","contributors":{"authors":[{"text":"Miles, A.K. 0000-0002-3108-808X","orcid":"https://orcid.org/0000-0002-3108-808X","contributorId":85902,"corporation":false,"usgs":true,"family":"Miles","given":"A.K.","affiliations":[],"preferred":false,"id":644822,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Spring, S.E.","contributorId":35258,"corporation":false,"usgs":true,"family":"Spring","given":"S.E.","email":"","affiliations":[],"preferred":false,"id":644823,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ricca, M.A.","contributorId":103609,"corporation":false,"usgs":true,"family":"Ricca","given":"M.A.","affiliations":[],"preferred":false,"id":644824,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Takekawa, J.T.","contributorId":173477,"corporation":false,"usgs":false,"family":"Takekawa","given":"J.T.","email":"","affiliations":[],"preferred":false,"id":644825,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Athearn, N.D.","contributorId":86958,"corporation":false,"usgs":true,"family":"Athearn","given":"N.D.","affiliations":[],"preferred":false,"id":644826,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Schoellhamer, D. H. 0000-0001-9488-7340","orcid":"https://orcid.org/0000-0001-9488-7340","contributorId":85624,"corporation":false,"usgs":true,"family":"Schoellhamer","given":"D. H.","affiliations":[],"preferred":false,"id":644827,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031683,"text":"70031683 - 2007 - Does amplitude scaling of ground motion records result in biased nonlinear structural drift responses?","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031683","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1434,"text":"Earthquake Engineering and Structural Dynamics","active":true,"publicationSubtype":{"id":10}},"title":"Does amplitude scaling of ground motion records result in biased nonlinear structural drift responses?","docAbstract":"Limitations of the existing earthquake ground motion database lead to scaling of records to obtain seismograms consistent with a ground motion target for structural design and evaluation. In the engineering seismology community, acceptable limits for 'legitimate' scaling vary from one (no scaling allowed) to 10 or more. The concerns expressed by detractors of scaling are mostly based on the knowledge of, for example, differences in ground motion characteristics for different earthquake magnitude-distance (Mw-Rclose) scenarios, and much less on their effects on structures. At the other end of the spectrum, proponents have demonstrated that scaling is not only legitimate but also useful for assessing structural response statistics for Mw-Rclose scenarios. Their studies, however, have not investigated more recent purposes of scaling and have not always drawn conclusions for a wide spectrum of structural vibration periods and strengths. This article investigates whether scaling of records randomly selected from an Mw-Rclose bin (or range) to a target fundamental-mode spectral acceleration (Sa) level introduces bias in the expected nonlinear structural drift response of both single-degree-of-freedom oscillators and one multi-degree-of-freedom building. The bias is quantified relative to unscaled records from the target Mw-Rclose bin that are 'naturally' at the target Sa level. We consider scaling of records from the target Mw-Rclose bin and from other Mw-Rclose bins. The results demonstrate that scaling can indeed introduce a bias that, for the most part, ca be explained by differences between the elastic response spectra of the scaled versus unscaled records. Copyright ?? 2007 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Earthquake Engineering and Structural Dynamics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/eqe.695","issn":"00988847","usgsCitation":"Luco, N., and Bazzurro, P., 2007, Does amplitude scaling of ground motion records result in biased nonlinear structural drift responses?: Earthquake Engineering and Structural Dynamics, v. 36, no. 13, p. 1813-1835, https://doi.org/10.1002/eqe.695.","startPage":"1813","endPage":"1835","numberOfPages":"23","costCenters":[],"links":[{"id":212335,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/eqe.695"},{"id":239803,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"36","issue":"13","noUsgsAuthors":false,"publicationDate":"2007-06-22","publicationStatus":"PW","scienceBaseUri":"505a038ae4b0c8380cd50512","contributors":{"authors":[{"text":"Luco, N.","contributorId":34240,"corporation":false,"usgs":true,"family":"Luco","given":"N.","email":"","affiliations":[],"preferred":false,"id":432674,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bazzurro, P.","contributorId":90537,"corporation":false,"usgs":true,"family":"Bazzurro","given":"P.","email":"","affiliations":[],"preferred":false,"id":432675,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031671,"text":"70031671 - 2007 - Cross-shelf transport of pink shrimp larvae: Interactions of tidal currents, larval vertical migrations and internal tides","interactions":[],"lastModifiedDate":"2016-03-30T13:29:29","indexId":"70031671","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2663,"text":"Marine Ecology Progress Series","active":true,"publicationSubtype":{"id":10}},"title":"Cross-shelf transport of pink shrimp larvae: Interactions of tidal currents, larval vertical migrations and internal tides","docAbstract":"<p><span>Transport and behavior of pink shrimp&nbsp;</span><i>Farfantepenaeu</i><span>s&nbsp;</span><i>duorarum</i><span>&nbsp;larvae were investigated on the southwestern Florida (SWF) shelf of the Gulf of Mexico between the Dry Tortugas spawning grounds and Florida Bay nursery grounds. Stratified plankton samples and hydrographic data were collected at 2 h intervals at 3 stations located on a cross-shelf transect. At the Marquesas station, midway between Dry Tortugas and Florida Bay, internal tides were recognized by anomalously cool water, a shallow thermocline with strong density gradients, strong current shear, and a high concentration of pink shrimp larvae at the shallow thermocline. Low Richardson numbers occurred at the pycnocline depth, indicating vertical shear instability and possible turbulent transport from the lower to the upper layer where myses and postlarvae were concentrated. Analysis of vertically stratified plankton suggested that larvae perform vertical migrations and the specific behavior changes ontogenetically; protozoeae were found deeper than myses, and myses deeper than postlarvae. Relative concentrations of protozoea in the upper, middle and bottom layers were consistent with a diel vertical migration, whereas that of postlarvae and myses were consistent with the semidiurnal tides in phase with the flood tide. Postlarvae, the shallowest dwellers that migrate with a semidiurnal periodicity, experienced the largest net onshore flux and larval concentrations were highly correlated with the cross-shelf current. These results provide the first evidence of an onshore tidal transport (a type of selective tidal stream transport, STST), in decapod larvae migrating in continental shelf waters offshore, ca. 100 km from the coast and at a depth of 20 m, while approaching the coastal nursery grounds. Longer time series would be necessary to establish whether internal tides play any role in the larval onshore transport of this species and determine if the STST is the dominant onshore transport mechanism.</span></p>","language":"English","publisher":"Inter-Research","publisherLocation":"Oldendorf/Luhe, Germany","doi":"10.3354/meps06916","issn":"01718630","usgsCitation":"Criales, M.M., Browder, J.A., Mooers, C., Robblee, M., Cardenas, H., and Jackson, T.L., 2007, Cross-shelf transport of pink shrimp larvae: Interactions of tidal currents, larval vertical migrations and internal tides: Marine Ecology Progress Series, v. 345, p. 167-184, https://doi.org/10.3354/meps06916.","productDescription":"18 p.","startPage":"167","endPage":"184","numberOfPages":"18","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":477140,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3354/meps06916","text":"Publisher Index Page"},{"id":239637,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212187,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3354/meps06916"}],"country":"United States","state":"Florida","otherGeospatial":"Dry Tortugas, Florida Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -79.91455078125,\n              25.94816628853973\n            ],\n            [\n              -79.9200439453125,\n              25.54244147012483\n            ],\n            [\n              -80.2166748046875,\n              25.04081549894912\n            ],\n            [\n              -80.8648681640625,\n              24.56211235799689\n            ],\n            [\n              -81.5789794921875,\n              24.412140070651528\n            ],\n            [\n              -82.6336669921875,\n              24.382124181118236\n            ],\n            [\n              -83.07861328125,\n              24.45215015618098\n            ],\n            [\n              -83.1060791015625,\n              24.696934226366672\n            ],\n            [\n              -82.5787353515625,\n              24.806681353851964\n            ],\n            [\n              -81.3262939453125,\n              24.926294766395593\n            ],\n            [\n              -80.760498046875,\n              25.224820176765036\n            ],\n            [\n              -80.4364013671875,\n              25.606855993715016\n            ],\n            [\n              -80.343017578125,\n              25.849336891707605\n            ],\n            [\n              -80.2056884765625,\n              25.93828707492375\n            ],\n            [\n              -80.04638671875,\n              25.96792222903405\n            ],\n            [\n              -79.91455078125,\n              25.94816628853973\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"345","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fcc5e4b0c8380cd4e41a","contributors":{"authors":[{"text":"Criales, Maria M.","contributorId":69330,"corporation":false,"usgs":false,"family":"Criales","given":"Maria","email":"","middleInitial":"M.","affiliations":[{"id":12565,"text":"Rosenstiel School of Atomospheric Science, University of Miami","active":true,"usgs":false}],"preferred":false,"id":432605,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Browder, Joan A.","contributorId":7439,"corporation":false,"usgs":true,"family":"Browder","given":"Joan","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":432601,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mooers, C.N.K.","contributorId":13762,"corporation":false,"usgs":true,"family":"Mooers","given":"C.N.K.","email":"","affiliations":[],"preferred":false,"id":432603,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Robblee, M. B.","contributorId":23879,"corporation":false,"usgs":true,"family":"Robblee","given":"M. B.","affiliations":[],"preferred":false,"id":432604,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cardenas, H.","contributorId":11411,"corporation":false,"usgs":true,"family":"Cardenas","given":"H.","email":"","affiliations":[],"preferred":false,"id":432602,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Jackson, Thomas L.","contributorId":93667,"corporation":false,"usgs":true,"family":"Jackson","given":"Thomas","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":432606,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031669,"text":"70031669 - 2007 - CO2 storage capacity estimation: Methodology and gaps","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70031669","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2049,"text":"International Journal of Greenhouse Gas Control","active":true,"publicationSubtype":{"id":10}},"title":"CO2 storage capacity estimation: Methodology and gaps","docAbstract":"Implementation of CO2 capture and geological storage (CCGS) technology at the scale needed to achieve a significant and meaningful reduction in CO2 emissions requires knowledge of the available CO2 storage capacity. CO2 storage capacity assessments may be conducted at various scales-in decreasing order of size and increasing order of resolution: country, basin, regional, local and site-specific. Estimation of the CO2 storage capacity in depleted oil and gas reservoirs is straightforward and is based on recoverable reserves, reservoir properties and in situ CO2 characteristics. In the case of CO2-EOR, the CO2 storage capacity can be roughly evaluated on the basis of worldwide field experience or more accurately through numerical simulations. Determination of the theoretical CO2 storage capacity in coal beds is based on coal thickness and CO2 adsorption isotherms, and recovery and completion factors. Evaluation of the CO2 storage capacity in deep saline aquifers is very complex because four trapping mechanisms that act at different rates are involved and, at times, all mechanisms may be operating simultaneously. The level of detail and resolution required in the data make reliable and accurate estimation of CO2 storage capacity in deep saline aquifers practical only at the local and site-specific scales. This paper follows a previous one on issues and development of standards for CO2 storage capacity estimation, and provides a clear set of definitions and methodologies for the assessment of CO2 storage capacity in geological media. Notwithstanding the defined methodologies suggested for estimating CO2 storage capacity, major challenges lie ahead because of lack of data, particularly for coal beds and deep saline aquifers, lack of knowledge about the coefficients that reduce storage capacity from theoretical to effective and to practical, and lack of knowledge about the interplay between various trapping mechanisms at work in deep saline aquifers. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"International Journal of Greenhouse Gas Control","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S1750-5836(07)00086-2","issn":"17505836","usgsCitation":"Bachu, S., Bonijoly, D., Bradshaw, J., Burruss, R., Holloway, S., Christensen, N., and Mathiassen, O., 2007, CO2 storage capacity estimation: Methodology and gaps: International Journal of Greenhouse Gas Control, v. 1, no. 4, p. 430-443, https://doi.org/10.1016/S1750-5836(07)00086-2.","startPage":"430","endPage":"443","numberOfPages":"14","costCenters":[],"links":[{"id":477261,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://nora.nerc.ac.uk/id/eprint/4475/1/Abstract.pdf","text":"External Repository"},{"id":240151,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212635,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S1750-5836(07)00086-2"}],"volume":"1","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f2d5e4b0c8380cd4b3f7","contributors":{"authors":[{"text":"Bachu, S.","contributorId":35124,"corporation":false,"usgs":true,"family":"Bachu","given":"S.","email":"","affiliations":[],"preferred":false,"id":432592,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bonijoly, D.","contributorId":51985,"corporation":false,"usgs":true,"family":"Bonijoly","given":"D.","email":"","affiliations":[],"preferred":false,"id":432593,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bradshaw, J.","contributorId":75758,"corporation":false,"usgs":true,"family":"Bradshaw","given":"J.","email":"","affiliations":[],"preferred":false,"id":432595,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Burruss, R.","contributorId":18178,"corporation":false,"usgs":true,"family":"Burruss","given":"R.","affiliations":[],"preferred":false,"id":432590,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Holloway, S.","contributorId":22150,"corporation":false,"usgs":true,"family":"Holloway","given":"S.","email":"","affiliations":[],"preferred":false,"id":432591,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Christensen, N.P.","contributorId":70193,"corporation":false,"usgs":true,"family":"Christensen","given":"N.P.","email":"","affiliations":[],"preferred":false,"id":432594,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Mathiassen, O.M.","contributorId":95275,"corporation":false,"usgs":true,"family":"Mathiassen","given":"O.M.","email":"","affiliations":[],"preferred":false,"id":432596,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70031668,"text":"70031668 - 2007 - Flood regionalization: A hybrid geographic and predictor-variable region-of-influence regression method","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70031668","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2341,"text":"Journal of Hydrologic Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Flood regionalization: A hybrid geographic and predictor-variable region-of-influence regression method","docAbstract":"To facilitate estimation of streamflow characteristics at an ungauged site, hydrologists often define a region of influence containing gauged sites hydrologically similar to the estimation site. This region can be defined either in geographic space or in the space of the variables that are used to predict streamflow (predictor variables). These approaches are complementary, and a combination of the two may be superior to either. Here we propose a hybrid region-of-influence (HRoI) regression method that combines the two approaches. The new method was applied with streamflow records from 1,091 gauges in the southeastern United States to estimate the 50-year peak flow (Q50). The HRoI approach yielded lower root-mean-square estimation errors and produced fewer extreme errors than either the predictor-variable or geographic region-of-influence approaches. It is concluded, for Q50 in the study region, that similarity with respect to the basin characteristics considered (area, slope, and annual precipitation) is important, but incomplete, and that the consideration of geographic proximity of stations provides a useful surrogate for characteristics that are not included in the analysis. ?? 2007 ASCE.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrologic Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1061/(ASCE)1084-0699(2007)12:6(585)","issn":"10840699","usgsCitation":"Eng, K., Milly, P., and Tasker, G.D., 2007, Flood regionalization: A hybrid geographic and predictor-variable region-of-influence regression method: Journal of Hydrologic Engineering, v. 12, no. 6, p. 585-591, https://doi.org/10.1061/(ASCE)1084-0699(2007)12:6(585).","startPage":"585","endPage":"591","numberOfPages":"7","costCenters":[],"links":[{"id":212608,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/(ASCE)1084-0699(2007)12:6(585)"},{"id":240116,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"12","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1150e4b0c8380cd53f5f","contributors":{"authors":[{"text":"Eng, K.","contributorId":51063,"corporation":false,"usgs":true,"family":"Eng","given":"K.","email":"","affiliations":[],"preferred":false,"id":432587,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Milly, P. C. D.","contributorId":100489,"corporation":false,"usgs":true,"family":"Milly","given":"P. C. D.","affiliations":[],"preferred":false,"id":432589,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tasker, Gary D.","contributorId":83097,"corporation":false,"usgs":true,"family":"Tasker","given":"Gary","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":432588,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031667,"text":"70031667 - 2007 - Energy feedbacks of northern high-latitude ecosystems to the climate system due to reduced snow cover during 20th century warming","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70031667","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1837,"text":"Global Change Biology","active":true,"publicationSubtype":{"id":10}},"title":"Energy feedbacks of northern high-latitude ecosystems to the climate system due to reduced snow cover during 20th century warming","docAbstract":"The warming associated with changes in snow cover in northern high-latitude terrestrial regions represents an important energy feedback to the climate system. Here, we simulate snow cover-climate feedbacks (i.e. changes in snow cover on atmospheric heating) across the Pan-arctic over two distinct warming periods during the 20th century, 1910-1940 and 1970-2000. We offer evidence that increases in snow cover-climate feedbacks during 1970-2000 were nearly three times larger than during 1910-1940 because the recent snow-cover change occurred in spring, when radiation load is highest, rather than in autumn. Based on linear regression analysis, we also detected a greater sensitivity of snow cover-climate feedbacks to temperature trends during the more recent time period. Pan-arctic vegetation types differed substantially in snow cover-climate feedbacks. Those with a high seasonal contrast in albedo, such as tundra, showed much larger changes in atmospheric heating than did those with a low seasonal contrast in albedo, such as forests, even if the changes in snow-cover duration were similar across the vegetation types. These changes in energy exchange warrant careful consideration in studies of climate change, particularly with respect to associated shifts in vegetation between forests, grasslands, and tundra. ?? 2007 Blackwell Publishing Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Global Change Biology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1365-2486.2007.01450.x","issn":"13541013","usgsCitation":"Euskirchen, E., McGuire, A., and Chapin, F., 2007, Energy feedbacks of northern high-latitude ecosystems to the climate system due to reduced snow cover during 20th century warming: Global Change Biology, v. 13, no. 11, p. 2425-2438, https://doi.org/10.1111/j.1365-2486.2007.01450.x.","startPage":"2425","endPage":"2438","numberOfPages":"14","costCenters":[],"links":[{"id":212607,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-2486.2007.01450.x"},{"id":240115,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"13","issue":"11","noUsgsAuthors":false,"publicationDate":"2007-09-05","publicationStatus":"PW","scienceBaseUri":"505a0949e4b0c8380cd51e62","contributors":{"authors":[{"text":"Euskirchen, E.S.","contributorId":44737,"corporation":false,"usgs":true,"family":"Euskirchen","given":"E.S.","affiliations":[],"preferred":false,"id":432585,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McGuire, A. D.","contributorId":16552,"corporation":false,"usgs":true,"family":"McGuire","given":"A. D.","affiliations":[],"preferred":false,"id":432584,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chapin, F.S.","contributorId":48384,"corporation":false,"usgs":true,"family":"Chapin","given":"F.S.","affiliations":[],"preferred":false,"id":432586,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031666,"text":"70031666 - 2007 - Response of bird species densities to habitat structure and fire history along a Midwestern open-forest gradient","interactions":[],"lastModifiedDate":"2016-04-28T13:44:57","indexId":"70031666","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1318,"text":"Condor","active":true,"publicationSubtype":{"id":10}},"title":"Response of bird species densities to habitat structure and fire history along a Midwestern open-forest gradient","docAbstract":"<p>Oak savannas were historically common but are currently rare in the Midwestern United States. We assessed possible associations of bird species with savannas and other threatened habitats in the region by relating fire frequency and vegetation characteristics to seasonal densities of 72 bird species distributed across an open-forest gradient in northwestern Indiana. About one-third of the species did not exhibit statistically significant relationships with any combination of seven vegetation characteristics that included vegetation cover in five vertical strata, dead tree density, and tree height. For 40% of the remaining species, models best predicting species density incorporated tree density. Therefore, management based solely on manipulating tree density may not be an adequate strategy for managing bird populations along this open-forest gradient. Few species exhibited sharp peaks in predicted density under habitat conditions expected in restored savannas, suggesting that few savanna specialists occur among Midwestern bird species. When fire frequency, measured over fifteen years, was added to vegetation characteristics as a predictor of species density, it was incorporated into models for about one-quarter of species, suggesting that fire may modify habitat characteristics in ways that are important for birds but not captured by the structural habitat variables measured. Among those species, similar numbers had peaks in predicted density at low, intermediate, or high fire frequency. For species suggested by previous studies to have a preference for oak savannas along the open-forest gradient, estimated density was maximized at an average fire return interval of about one fire every three years. ?? The Cooper Ornithological Society 2007.</p>","language":"English","publisher":"Cooper Ornithological Society","doi":"10.1650/0010-5422(2007)109[734:ROBSDT]2.0.CO;2","issn":"00105422","usgsCitation":"Grundel, R., and Pavlovic, N., 2007, Response of bird species densities to habitat structure and fire history along a Midwestern open-forest gradient: Condor, v. 109, no. 4, p. 734-749, https://doi.org/10.1650/0010-5422(2007)109[734:ROBSDT]2.0.CO;2.","productDescription":"16 p.","startPage":"734","endPage":"749","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":476963,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://zenodo.org/record/1236383","text":"Publisher Index Page"},{"id":240079,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212576,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1650/0010-5422(2007)109[734:ROBSDT]2.0.CO;2"}],"volume":"109","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aaa37e4b0c8380cd861ed","contributors":{"authors":[{"text":"Grundel, R.","contributorId":37110,"corporation":false,"usgs":true,"family":"Grundel","given":"R.","affiliations":[],"preferred":false,"id":432582,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pavlovic, N.B.","contributorId":105076,"corporation":false,"usgs":true,"family":"Pavlovic","given":"N.B.","email":"","affiliations":[],"preferred":false,"id":432583,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031665,"text":"70031665 - 2007 - Population inertia and its sensitivity to changes in vital rates and population structure","interactions":[],"lastModifiedDate":"2017-12-07T08:45:44","indexId":"70031665","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Population inertia and its sensitivity to changes in vital rates and population structure","docAbstract":"Because the (st)age structure of a population may rarely be stable, studies of transient population dynamics and population momentum are becoming ever more popular. Yet, studies of \"population momentum\" are restricted in the sense that they describe the inertia of population size resulting from a demographic transition to the stationary population growth rate. Although rarely mentioned, inertia in population size is a general phenomenon and can be produced by any demographic transition or perturbation. Because population size is of central importance in demography, conservation, and management, formulas relating the sensitivity of population inertia to changes in underlying vital rates and population structure could provide much-needed insight into the dynamics of populations with unstable (st)age structure. Here, we derive such formulas, which are readily computable, and provide examples of their potential use in studies of life history and applied arenas of population study. ?? 2007 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/06-1801.1","issn":"00129658","usgsCitation":"Koons, D.N., Holmes, R.R., and Grand, J.B., 2007, Population inertia and its sensitivity to changes in vital rates and population structure: Ecology, v. 88, no. 11, p. 2857-2867, https://doi.org/10.1890/06-1801.1.","startPage":"2857","endPage":"2867","numberOfPages":"11","costCenters":[],"links":[{"id":240078,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212575,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/06-1801.1"}],"volume":"88","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7d7be4b0c8380cd79f8e","contributors":{"authors":[{"text":"Koons, David N.","contributorId":28137,"corporation":false,"usgs":false,"family":"Koons","given":"David","email":"","middleInitial":"N.","affiliations":[{"id":6621,"text":"Colorado State University","active":true,"usgs":false}],"preferred":false,"id":432581,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Holmes, Randall R.","contributorId":201221,"corporation":false,"usgs":false,"family":"Holmes","given":"Randall","email":"","middleInitial":"R.","affiliations":[{"id":13360,"text":"Auburn University","active":true,"usgs":false}],"preferred":false,"id":432580,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Grand, J. Barry 0000-0002-3576-4567 barry_grand@usgs.gov","orcid":"https://orcid.org/0000-0002-3576-4567","contributorId":579,"corporation":false,"usgs":true,"family":"Grand","given":"J.","email":"barry_grand@usgs.gov","middleInitial":"Barry","affiliations":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"preferred":true,"id":432579,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031663,"text":"70031663 - 2007 - Steeply dipping heaving bedrock, Colorado: Part 1 - Heave features and physical geological framework","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031663","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1574,"text":"Environmental & Engineering Geoscience","printIssn":"1078-7275","active":true,"publicationSubtype":{"id":10}},"title":"Steeply dipping heaving bedrock, Colorado: Part 1 - Heave features and physical geological framework","docAbstract":"Differentially heaving bedrock has caused severe damage near the Denver metropolitan area. This paper describes heave-feature morphologies, the underlying bedrock framework, and their inter-relationship. The heave features are linear to curvilinear and may attain heights of 0.7 m (2.4 ft), widths of 58 m (190 ft), and lengths of 1,067 m (3,500 ft). They are nearly symmetrical to highly asymmetrical in cross section, with width-to-height ratios of 45:1 to 400:1, and most are oriented parallel with the mountain front. The bedrock consists of Mesozoic sedimentary formations having dip angles of 30 degrees to vertical to overturned. Mixed claystone-siltstone bedding sequences up to 36-m (118-ft) thick are common in the heave-prone areas, and interbeds of bentonite, limestone, or sandstone may be present. Highly fractured zones of weathered to variably weathered claystone extend to depths of 19.5 to 22.3 m (64 to 73 ft). Fracture spacings are 0.1 to 0.2 m (0.3 to 0.7 ft) in the weathered and variably weathered bedrock and up to 0.75 m (2.5 ft) in the underlying, unweathered bedrock. Curvilinear shear planes in the weathered claystone show thrust or reverse offsets up to 1.2 m (3.9 ft). Three associations between heave-feature morphologies and the geological framework are recognized: (1) Linear, symmetrical to asymmetrical heaves are associated with primary bedding composition changes. (2) Linear, highly asymmetrical heaves are associated with shear planes along bedding. (3) Curvi-linear, highly asymmetrical heaves are associated with bedding-oblique shear planes.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental and Engineering Geoscience","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/gseegeosci.13.4.289","issn":"10787275","usgsCitation":"Noe, D., Higgins, J., and Olsen, H.W., 2007, Steeply dipping heaving bedrock, Colorado: Part 1 - Heave features and physical geological framework: Environmental & Engineering Geoscience, v. 13, no. 4, p. 289-308, https://doi.org/10.2113/gseegeosci.13.4.289.","startPage":"289","endPage":"308","numberOfPages":"20","costCenters":[],"links":[{"id":240044,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212544,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gseegeosci.13.4.289"}],"volume":"13","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9827e4b08c986b31be6d","contributors":{"authors":[{"text":"Noe, D.C.","contributorId":95215,"corporation":false,"usgs":true,"family":"Noe","given":"D.C.","email":"","affiliations":[],"preferred":false,"id":432575,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Higgins, J.D.","contributorId":37154,"corporation":false,"usgs":true,"family":"Higgins","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":432574,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Olsen, H. W.","contributorId":10060,"corporation":false,"usgs":true,"family":"Olsen","given":"H.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":432573,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
]}