{"pageNumber":"1011","pageRowStart":"25250","pageSize":"25","recordCount":40818,"records":[{"id":70028170,"text":"70028170 - 2006 - Mountain hydrology of the western United States","interactions":[],"lastModifiedDate":"2018-04-03T12:45:48","indexId":"70028170","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Mountain hydrology of the western United States","docAbstract":"<p><span>Climate change and climate variability, population growth, and land use change drive the need for new hydrologic knowledge and understanding. In the mountainous West and other similar areas worldwide, three pressing hydrologic needs stand out: first, to better understand the processes controlling the partitioning of energy and water fluxes within and out from these systems; second, to better understand feedbacks between hydrological fluxes and biogeochemical and ecological processes; and, third, to enhance our physical and empirical understanding with integrated measurement strategies and information systems. We envision an integrative approach to monitoring, modeling, and sensing the mountain environment that will improve understanding and prediction of hydrologic fluxes and processes. Here extensive monitoring of energy fluxes and hydrologic states are needed to supplement existing measurements, which are largely limited to streamflow and snow water equivalent. Ground‐based observing systems must be explicitly designed for integration with remotely sensed data and for scaling up to basins and whole ranges.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2005WR004387","usgsCitation":"Bales, R.C., Molotch, N.P., Painter, T.H., Dettinger, M., Rice, R., and Dozier, J., 2006, Mountain hydrology of the western United States: Water Resources Research, v. 42, no. 8, Article W08432; 13 p., https://doi.org/10.1029/2005WR004387.","productDescription":"Article W08432; 13 p.","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":477359,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2005wr004387","text":"Publisher Index Page"},{"id":237264,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"42","issue":"8","noUsgsAuthors":false,"publicationDate":"2006-08-26","publicationStatus":"PW","scienceBaseUri":"505a5eb5e4b0c8380cd70c02","contributors":{"authors":[{"text":"Bales, Roger C.","contributorId":189659,"corporation":false,"usgs":false,"family":"Bales","given":"Roger","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":416887,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Molotch, Noah P. 0000-0003-4733-8060","orcid":"https://orcid.org/0000-0003-4733-8060","contributorId":203466,"corporation":false,"usgs":false,"family":"Molotch","given":"Noah","email":"","middleInitial":"P.","affiliations":[{"id":36627,"text":"University of Colorado, Boulder","active":true,"usgs":false}],"preferred":false,"id":416888,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Painter, Thomas H.","contributorId":193067,"corporation":false,"usgs":false,"family":"Painter","given":"Thomas","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":416892,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dettinger, Michael D. 0000-0002-7509-7332 mddettin@usgs.gov","orcid":"https://orcid.org/0000-0002-7509-7332","contributorId":146383,"corporation":false,"usgs":true,"family":"Dettinger","given":"Michael D.","email":"mddettin@usgs.gov","affiliations":[],"preferred":false,"id":416891,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Rice, Robert","contributorId":149915,"corporation":false,"usgs":false,"family":"Rice","given":"Robert","affiliations":[],"preferred":false,"id":416890,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Dozier, Jeff","contributorId":190695,"corporation":false,"usgs":false,"family":"Dozier","given":"Jeff","email":"","affiliations":[],"preferred":false,"id":416889,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70028245,"text":"70028245 - 2006 - Cenozoic tectonic evolution of the basin and range province in northwestern Nevada","interactions":[],"lastModifiedDate":"2012-03-12T17:20:44","indexId":"70028245","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":732,"text":"American Journal of Science","active":true,"publicationSubtype":{"id":10}},"title":"Cenozoic tectonic evolution of the basin and range province in northwestern Nevada","docAbstract":"A regional synthesis of new and existing geologic and thermochronologic data document late Cretaceous - early Cenozoic regional erosion, Oligocene - Miocene volcanism, and subsequent late Miocene extension of the Basin and Range Province in northwestern Nevada and northeastern California. Across an ???220-km-wide region between the Santa Rosa and Warner Ranges, conformable sequences of 35 to 15 Ma volcanic rocks are cut by only a single generation of high-angle normal faults that accommodated ???23 km of total east-west extension (???12%). Fission-track, (U-Th)/He, geologic, and structural data from the Pine Forest Range show that faulting there began at 11 to 12 Ma, progressed at a relatively constant rate until at least 3 Ma, and has continued until near the present time. Extension in the Santa Rosa Range to the east took place during the same interval, although the post-6 Ma part of this history is less well constrained. Less complete constraints from adjacent ranges permit a similar timing for faulting, and we infer that extensional faulting in northwestern Nevada began everywhere at 12 Ma and has continued up to the present. Faulting in the Warner Range in northeastern California can only be constrained to have begun between 14 and 3 Ma, but may represent westward migration of Basin and Range extension during the Pliocene. Compared to the many parts of the Basin and Range in central and southern Nevada, extension in northwestern Nevada began more recently, is of lesser total magnitude, and was accommodated entirely by high-angle normal faults. Fission-track data document Late Cretaceous unroofing of Cretaceous (115 - 100 Ma) granitic basement rocks in northwestern Nevada, followed by a long period of relative tectonic quiescence that persisted through Oligocene and Miocene volcanism until the onset of Basin and Range extension at ???12 Ma. The low magnitude of extension (12%) and early Tertiary stability suggest that the modern ???31 km thick crust in northwestern Nevada was only slightly thicker (???35 km) prior to extension at 12 Ma, and was no thicker than ???38 km in the Late Cretaceous. This stands in contrast to other parts of the Basin and Range, where the crust was thickened to at least 45 to 50 km by Cretaceous thrusting and subsequently thinned to ???30 km by large magnitude (>50%) extension.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Journal of Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2475/08.2006.02","issn":"00029599","usgsCitation":"Colgan, J., Dumitru, T., Reiners, P., Wooden, J.L., and Miller, E.L., 2006, Cenozoic tectonic evolution of the basin and range province in northwestern Nevada: American Journal of Science, v. 306, no. 8, p. 616-654, https://doi.org/10.2475/08.2006.02.","startPage":"616","endPage":"654","numberOfPages":"39","costCenters":[],"links":[{"id":477367,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.2475/08.2006.02","text":"Publisher Index Page"},{"id":210047,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2475/08.2006.02"},{"id":236847,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"306","issue":"8","noUsgsAuthors":false,"publicationDate":"2006-12-11","publicationStatus":"PW","scienceBaseUri":"5059f3e8e4b0c8380cd4ba19","contributors":{"authors":[{"text":"Colgan, J.P.","contributorId":71678,"corporation":false,"usgs":true,"family":"Colgan","given":"J.P.","affiliations":[],"preferred":false,"id":417217,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dumitru, T.A.","contributorId":24973,"corporation":false,"usgs":true,"family":"Dumitru","given":"T.A.","affiliations":[],"preferred":false,"id":417214,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Reiners, P.W.","contributorId":34241,"corporation":false,"usgs":true,"family":"Reiners","given":"P.W.","email":"","affiliations":[],"preferred":false,"id":417215,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wooden, J. L.","contributorId":58678,"corporation":false,"usgs":true,"family":"Wooden","given":"J.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":417216,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Miller, E. L.","contributorId":75583,"corporation":false,"usgs":true,"family":"Miller","given":"E.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":417218,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70028243,"text":"70028243 - 2006 - New insights into Arctic paleogeography and tectonics from U-Pb detrital zircon geochronology","interactions":[],"lastModifiedDate":"2018-05-29T16:34:08","indexId":"70028243","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3524,"text":"Tectonics","active":true,"publicationSubtype":{"id":10}},"title":"New insights into Arctic paleogeography and tectonics from U-Pb detrital zircon geochronology","docAbstract":"To test existing models for the formation of the Amerasian Basin, detrital zircon suites from 12 samples of Triassic sandstone from the circum-Arctic region were dated by laser ablation-inductively coupled plasma-mass spectrometry (ICP-MS). The northern Verkhoyansk (NE Russia) has Permo-Carboniferous (265-320 Ma) and Cambro-Silurian (410-505 Ma) zircon populations derived via river systems from the active Baikal Mountain region along the southern Siberian craton. Chukotka, Wrangel Island (Russia), and the Lisburne Hills (western Alaska) also have Permo-Carboniferous (280-330 Ma) and late Precambrian-Silurian (420-580 Ma) zircons in addition to Permo-Triassic (235-265 Ma), Devonian (340-390 Ma), and late Precambrian (1000-1300 Ma) zircons. These ages suggest at least partial derivation from the Taimyr, Siberian Trap, and/ or east Urals regions of Arctic Russia. The northerly derived Ivishak Formation (Sadlerochit Mountains, Alaska) and Pat Bay Formation (Sverdrup Basin, Canada) are dominated by Cambrian-latest Precambrian (500-600 Ma) and 445-490 Ma zircons. Permo-Carboniferous and Permo-Triassic zircons are absent. The Bjorne Formation (Sverdrup Basin), derived from the south, differs from other samples studied with mostly 1130-1240 Ma and older Precambrian zircons in addition to 430-470 Ma zircons. The most popular tectonic model for the origin of the Amerasian Basin involves counterclockwise rotation of the Arctic Alaska-Chukotka microplate away from the Canadian Arctic margin. The detrital zircon data suggest that the Chukotka part of the microplate originated closer to the Taimyr and Verkhoyansk, east of the Polar Urals of Russia, and not from the Canadian Arctic. Copyright 2006 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Tectonics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2005TC001830","issn":"02787407","usgsCitation":"Miller, E.L., Toro, J., Gehrels, G., Amato, J., Prokopiev, A., Tuchkova, M., Akinin, V., Dumitru, T., Moore, T., and Cecile, M., 2006, New insights into Arctic paleogeography and tectonics from U-Pb detrital zircon geochronology: Tectonics, v. 25, no. 3, https://doi.org/10.1029/2005TC001830.","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":477546,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2005tc001830","text":"Publisher Index Page"},{"id":236813,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":210021,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2005TC001830"}],"volume":"25","issue":"3","noUsgsAuthors":false,"publicationDate":"2006-06-06","publicationStatus":"PW","scienceBaseUri":"505a65d9e4b0c8380cd72c65","contributors":{"authors":[{"text":"Miller, E. L.","contributorId":75583,"corporation":false,"usgs":true,"family":"Miller","given":"E.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":417200,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Toro, J.","contributorId":88502,"corporation":false,"usgs":true,"family":"Toro","given":"J.","email":"","affiliations":[],"preferred":false,"id":417205,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gehrels, G.","contributorId":81685,"corporation":false,"usgs":true,"family":"Gehrels","given":"G.","affiliations":[],"preferred":false,"id":417202,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Amato, J.M.","contributorId":63214,"corporation":false,"usgs":true,"family":"Amato","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":417199,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Prokopiev, A.","contributorId":14182,"corporation":false,"usgs":true,"family":"Prokopiev","given":"A.","email":"","affiliations":[],"preferred":false,"id":417196,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Tuchkova, M.I.","contributorId":75744,"corporation":false,"usgs":true,"family":"Tuchkova","given":"M.I.","email":"","affiliations":[],"preferred":false,"id":417201,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Akinin, V.V.","contributorId":49583,"corporation":false,"usgs":true,"family":"Akinin","given":"V.V.","affiliations":[],"preferred":false,"id":417198,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Dumitru, T.A.","contributorId":24973,"corporation":false,"usgs":true,"family":"Dumitru","given":"T.A.","affiliations":[],"preferred":false,"id":417197,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Moore, Thomas E. 0000-0002-0878-0457","orcid":"https://orcid.org/0000-0002-0878-0457","contributorId":85592,"corporation":false,"usgs":true,"family":"Moore","given":"Thomas E.","affiliations":[],"preferred":false,"id":417204,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Cecile, M.P.","contributorId":83324,"corporation":false,"usgs":true,"family":"Cecile","given":"M.P.","email":"","affiliations":[],"preferred":false,"id":417203,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}}
,{"id":70028282,"text":"70028282 - 2006 - A landscape-scale model of yellow-billed loon (Gavia adamsii) habitat preferences in northern alaska","interactions":[],"lastModifiedDate":"2018-03-29T15:03:57","indexId":"70028282","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"A landscape-scale model of yellow-billed loon (Gavia adamsii) habitat preferences in northern alaska","docAbstract":"<p><span>We modeled yellow-billed loon (</span><i class=\"EmphasisTypeItalic \">Gavia adamsii</i><span>) habitat preferences in a 23,500&nbsp;km</span><sup>2</sup><span><span>&nbsp;</span>area of northern Alaska using intensive aerial surveys and landscape-scale habitat descriptors. Of the 757 lakes censused, yellow-billed loons occupied 15% and Pacific loons (</span><i class=\"EmphasisTypeItalic \">G. pacifica</i><span>) 42%. Lake area, depth, proportion of shoreline in aquatic vegetation, shoreline complexity, hydrological connectivity (stream present within 100&nbsp;m or absent), and an area–connectivity interaction were positive, significant predictors of yellow-billed loon presence in a multivariate logistic regression model, but distance to nearest river or Beaufort Sea coast were not. Predicted yellow-billed loon presence was 13 and 4.7 times more likely on deep and medium lakes, respectively, than on shallow lakes that freeze to the bottom. On small lakes (&lt;60&nbsp;ha), predicted yellow-billed loon presence was 4.8–1.7 times more likely on lakes with hydrological connectivity than without, but connectivity was not important at most lake sizes (65–750&nbsp;ha). Yellow-billed loon broods depend on fish available in the brood-rearing lake, and we suggest that a dependable supply of fish is more likely in larger lakes, those deep enough to have open water under winter ice, and those near streams. Highly convoluted shorelines and those with aquatic vegetation provide loon nesting and brood-rearing sites, as well as fish habitat. Pacific loon absence was a significant, positive predictor when added to the habitat model, indicating that yellow-billed loons were four times more likely on lakes without Pacific loons.</span></p>","language":"English","publisher":"Springer","doi":"10.1007/s10750-006-0042-2","issn":"00188158","usgsCitation":"Earnst, S.L., Platte, R., and Bond, L., 2006, A landscape-scale model of yellow-billed loon (Gavia adamsii) habitat preferences in northern alaska: Hydrobiologia, v. 567, no. 1, p. 227-236, https://doi.org/10.1007/s10750-006-0042-2.","productDescription":"10 p.","startPage":"227","endPage":"236","numberOfPages":"10","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":236885,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":210075,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-0042-2"}],"volume":"567","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e432e4b0c8380cd464b4","contributors":{"authors":[{"text":"Earnst, Susan L. susan_earnst@usgs.gov","contributorId":4446,"corporation":false,"usgs":true,"family":"Earnst","given":"Susan","email":"susan_earnst@usgs.gov","middleInitial":"L.","affiliations":[{"id":289,"text":"Forest and Rangeland Ecosys Science Center","active":true,"usgs":true}],"preferred":true,"id":417382,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Platte, Robert","contributorId":105680,"corporation":false,"usgs":true,"family":"Platte","given":"Robert","affiliations":[],"preferred":false,"id":417384,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bond, Laura","contributorId":89103,"corporation":false,"usgs":true,"family":"Bond","given":"Laura","affiliations":[],"preferred":false,"id":417383,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70028239,"text":"70028239 - 2006 - Effect of dispersal at range edges on the structure of species ranges","interactions":[],"lastModifiedDate":"2012-03-12T17:20:52","indexId":"70028239","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2939,"text":"Oikos","active":true,"publicationSubtype":{"id":10}},"title":"Effect of dispersal at range edges on the structure of species ranges","docAbstract":"Range edges are of particular interest to ecology because they hold key insights into the limits of the realized niche and associated population dynamics. A recent feature of Oikos summarized the state of the art on range edge ecology. While the typical question is what causes range edges, another important question is how range edges influence the distribution of abundances across a species geographic range when dispersal is present. We used a single species population dynamics model on a coupled-lattice to determine the effects of dispersal on peripheral populations as compared to populations at the core of the range. In the absence of resource gradients, the reduced neighborhood and thus lower connectivity or higher isolation among populations at the range edge alone led to significantly lower population sizes in the periphery of the range than in the core. Lower population sizes mean higher extinction risks and lower adaptability at the range edge, which could inhibit or slow range expansions, and thus effectively stabilize range edges. The strength of this effect depended on the potential population growth rate and the maximum dispersal distance. Lower potential population growth rates led to a stronger effect of dispersal resulting in a higher difference in population sizes between the two areas. The differential effect of dispersal on population sizes at the core and periphery of the range in the absence of resource gradients implies that traditional, habitat-based distribution models could result in misleading conclusions about the habitat quality in the periphery. Lower population sizes at the periphery are also relevant to conservation, because habitat removal not only eliminates populations but also creates new edges. Populations bordering these new edges may experience declines, due to their increased isolation. ?? OIKOS.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Oikos","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.2006.0030-1299.14825.x","issn":"00301299","usgsCitation":"Bahn, V., O’Connor, R., and Krohn, W., 2006, Effect of dispersal at range edges on the structure of species ranges: Oikos, v. 115, no. 1, p. 89-96, https://doi.org/10.1111/j.2006.0030-1299.14825.x.","startPage":"89","endPage":"96","numberOfPages":"8","costCenters":[],"links":[{"id":498948,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.2006.0030-1299.14825.x","text":"Publisher Index Page"},{"id":210400,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.2006.0030-1299.14825.x"},{"id":237305,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"115","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-07-12","publicationStatus":"PW","scienceBaseUri":"505a05d4e4b0c8380cd50fa9","contributors":{"authors":[{"text":"Bahn, V.","contributorId":23741,"corporation":false,"usgs":true,"family":"Bahn","given":"V.","email":"","affiliations":[],"preferred":false,"id":417183,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"O’Connor, R.J.","contributorId":37861,"corporation":false,"usgs":true,"family":"O’Connor","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":417184,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Krohn, W.B.","contributorId":64355,"corporation":false,"usgs":true,"family":"Krohn","given":"W.B.","email":"","affiliations":[],"preferred":false,"id":417185,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70028193,"text":"70028193 - 2006 - Numerical modeling of magnetic moments for UXO applications","interactions":[],"lastModifiedDate":"2012-03-12T17:20:43","indexId":"70028193","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Numerical modeling of magnetic moments for UXO applications","docAbstract":"The surface magnetic anomaly observed in UXO clearance is mainly dipolar and, consequently, the dipole is the only magnetic moment regularly recovered in UXO applications. The dipole moment contains information about intensity of magnetization but lacks information about shape. In contrast, higher-order moments, such as quadrupole and octupole, encode asymmetry properties of the magnetization distribution within the buried targets. In order to improve our understanding of magnetization distribution within UXO and non-UXO objects and its potential utility in UXO clearance, we present a 3D numerical modeling study for highly susceptible metallic objects. The basis for the modeling is the solution of a nonlinear integral equation describing magnetization within isolated objects. A solution for magnetization distribution then allows us to compute magnetic moments of the object, analyze their relationships, and provide a depiction of the surface anomaly produced by different moments within the object. Our modeling results show significant high-order moments for more asymmetric objects situated at depths typical of UXO burial, and suggest that the increased relative contribution to magnetic gradient data from these higher-order moments may provide a practical tool for improved UXO discrimination.","largerWorkTitle":"Proceedings of SPIE - The International Society for Optical Engineering","conferenceTitle":"Targets and Backgrounds XII: Characterization and Representation","conferenceDate":"17 April 2006 through 18 April 2006","conferenceLocation":"Kissimmee, FL","language":"English","doi":"10.1117/12.664959","issn":"0277786X","isbn":"0819462950; 9780819462954","usgsCitation":"Sanchez, V., Li, Y., Nabighian, M., and Wright, D., 2006, Numerical modeling of magnetic moments for UXO applications, <i>in</i> Proceedings of SPIE - The International Society for Optical Engineering, v. 6239, Kissimmee, FL, 17 April 2006 through 18 April 2006, https://doi.org/10.1117/12.664959.","costCenters":[],"links":[{"id":210234,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1117/12.664959"},{"id":237094,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"6239","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a68fae4b0c8380cd73acc","contributors":{"authors":[{"text":"Sanchez, V.","contributorId":107407,"corporation":false,"usgs":true,"family":"Sanchez","given":"V.","email":"","affiliations":[],"preferred":false,"id":416992,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Li, Y.","contributorId":41394,"corporation":false,"usgs":true,"family":"Li","given":"Y.","affiliations":[],"preferred":false,"id":416990,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nabighian, M.","contributorId":83286,"corporation":false,"usgs":true,"family":"Nabighian","given":"M.","email":"","affiliations":[],"preferred":false,"id":416991,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wright, D.","contributorId":6158,"corporation":false,"usgs":true,"family":"Wright","given":"D.","email":"","affiliations":[],"preferred":false,"id":416989,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70028181,"text":"70028181 - 2006 - Microsatellite DNA markers for assessing phylogeographic and population structure in Preble's meadow jumping mice (Zapus hudsonius preblei) and cross-amplification among neighbouring taxa","interactions":[],"lastModifiedDate":"2012-03-12T17:20:43","indexId":"70028181","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2775,"text":"Molecular Ecology Notes","onlineIssn":"1471-8286","printIssn":"1471-8278","active":true,"publicationSubtype":{"id":10}},"title":"Microsatellite DNA markers for assessing phylogeographic and population structure in Preble's meadow jumping mice (Zapus hudsonius preblei) and cross-amplification among neighbouring taxa","docAbstract":"We document the isolation and characterization of 14 tetranucleotide microsatellite DNA markers in Preble's meadow jumping mouse (Zapus hudsonius preblei). The identified markers displayed moderate levels of allelic diversity (averaging 4.9 alleles per locus) and heterozygosity (averaging 55.1%). Genotypic and allelic frequencies in a collection of 30 individuals conformed to Hardy-Weinberg equilibrium expectations and indicated no linkage disequilibrium. High levels of cross-amplification (95% overall) among neighbouring subspecies and two congeners (Zapus princeps and Zapus trinotatus) were observed. Multilocus genotypes resulting from these markers appear to provide ample genetic diversity for studies assessing individual- and population-level ecological interactions within Z. h. preblei and evolutionary relationships among neighbouring subspecies (Z. h. campestris, Z. h. intermedius, Z. h. pallidus and Z. h. luteus). ?? 2006 The Authors.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Molecular Ecology Notes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1471-8286.2006.01293.x","issn":"14718278","usgsCitation":"King, T., Eackles, M., and Young, C., 2006, Microsatellite DNA markers for assessing phylogeographic and population structure in Preble's meadow jumping mice (Zapus hudsonius preblei) and cross-amplification among neighbouring taxa: Molecular Ecology Notes, v. 6, no. 3, p. 670-673, https://doi.org/10.1111/j.1471-8286.2006.01293.x.","startPage":"670","endPage":"673","numberOfPages":"4","costCenters":[],"links":[{"id":210071,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1471-8286.2006.01293.x"},{"id":236879,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"6","issue":"3","noUsgsAuthors":false,"publicationDate":"2006-08-14","publicationStatus":"PW","scienceBaseUri":"505a569ce4b0c8380cd6d6d3","contributors":{"authors":[{"text":"King, T.L.","contributorId":93416,"corporation":false,"usgs":true,"family":"King","given":"T.L.","email":"","affiliations":[],"preferred":false,"id":416939,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Eackles, M.S.","contributorId":79059,"corporation":false,"usgs":true,"family":"Eackles","given":"M.S.","affiliations":[],"preferred":false,"id":416938,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Young, C.","contributorId":67709,"corporation":false,"usgs":true,"family":"Young","given":"C.","email":"","affiliations":[],"preferred":false,"id":416937,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70028157,"text":"70028157 - 2006 - An effective medium inversion algorithm for gas hydrate quantification and its application to laboratory and borehole measurements of gas hydrate-bearing sediments","interactions":[],"lastModifiedDate":"2017-08-16T09:13:03","indexId":"70028157","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1803,"text":"Geophysical Journal International","active":true,"publicationSubtype":{"id":10}},"title":"An effective medium inversion algorithm for gas hydrate quantification and its application to laboratory and borehole measurements of gas hydrate-bearing sediments","docAbstract":"The presence of gas hydrate in marine sediments alters their physical properties. In some circumstances, gas hydrate may cement sediment grains together and dramatically increase the seismic P- and S-wave velocities of the composite medium. Hydrate may also form a load-bearing structure within the sediment microstructure, but with different seismic wave attenuation characteristics, changing the attenuation behaviour of the composite. Here we introduce an inversion algorithm based on effective medium modelling to infer hydrate saturations from velocity and attenuation measurements on hydrate-bearing sediments. The velocity increase is modelled as extra binding developed by gas hydrate that strengthens the sediment microstructure. The attenuation increase is modelled through a difference in fluid flow properties caused by different permeabilities in the sediment and hydrate microstructures. We relate velocity and attenuation increases in hydrate-bearing sediments to their hydrate content, using an effective medium inversion algorithm based on the self-consistent approximation (SCA), differential effective medium (DEM) theory, and Biot and squirt flow mechanisms of fluid flow. The inversion algorithm is able to convert observations in compressional and shear wave velocities and attenuations to hydrate saturation in the sediment pore space. We applied our algorithm to a data set from the Mallik 2L–38 well, Mackenzie delta, Canada, and to data from laboratory measurements on gas-rich and water-saturated sand samples. Predictions using our algorithm match the borehole data and water-saturated laboratory data if the proportion of hydrate contributing to the load-bearing structure increases with hydrate saturation. The predictions match the gas-rich laboratory data if that proportion decreases with hydrate saturation. We attribute this difference to differences in hydrate formation mechanisms between the two environments.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Journal International","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Oxford University Press","doi":"10.1111/j.1365-246X.2006.03038.x","issn":"0956540X","usgsCitation":"Chand, S., Minshull, T., Priest, J., Best, A., Clayton, C., and Waite, W., 2006, An effective medium inversion algorithm for gas hydrate quantification and its application to laboratory and borehole measurements of gas hydrate-bearing sediments: Geophysical Journal International, v. 166, no. 2, p. 543-552, https://doi.org/10.1111/j.1365-246X.2006.03038.x.","productDescription":"10 p.","startPage":"543","endPage":"552","numberOfPages":"10","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true},{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":488257,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hdl.handle.net/1912/1771","text":"External Repository"},{"id":237091,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":210231,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-246X.2006.03038.x"}],"volume":"166","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ea2ee4b0c8380cd486ae","contributors":{"authors":[{"text":"Chand, S.","contributorId":27384,"corporation":false,"usgs":true,"family":"Chand","given":"S.","email":"","affiliations":[],"preferred":false,"id":416816,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Minshull, T.A.","contributorId":75815,"corporation":false,"usgs":true,"family":"Minshull","given":"T.A.","email":"","affiliations":[],"preferred":false,"id":416819,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Priest, J.A.","contributorId":75869,"corporation":false,"usgs":true,"family":"Priest","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":416820,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Best, A.I.","contributorId":75082,"corporation":false,"usgs":true,"family":"Best","given":"A.I.","email":"","affiliations":[],"preferred":false,"id":416818,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Clayton, C.R.I.","contributorId":7213,"corporation":false,"usgs":true,"family":"Clayton","given":"C.R.I.","email":"","affiliations":[],"preferred":false,"id":416815,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Waite, W.F.","contributorId":40329,"corporation":false,"usgs":true,"family":"Waite","given":"W.F.","email":"","affiliations":[],"preferred":false,"id":416817,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70028230,"text":"70028230 - 2006 - Simulating the influences of various fire regimes on caribou winter habitat","interactions":[],"lastModifiedDate":"2018-04-04T10:32:03","indexId":"70028230","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1450,"text":"Ecological Applications","active":true,"publicationSubtype":{"id":10}},"title":"Simulating the influences of various fire regimes on caribou winter habitat","docAbstract":"<p><span>Caribou are an integral component of high‐latitude ecosystems and represent a major subsistence food source for many northern people. The availability and quality of winter habitat is critical to sustain these caribou populations. Caribou commonly use older spruce woodlands with adequate terrestrial lichen, a preferred winter forage, in the understory. Changes in climate and fire regime pose a significant threat to the long‐term sustainability of this important winter habitat. Computer simulations performed with a spatially explicit vegetation succession model (ALFRESCO) indicate that changes in the frequency and extent of fire in interior Alaska may substantially impact the abundance and quality of winter habitat for caribou. We modeled four different fire scenarios and tracked the frequency, extent, and spatial distribution of the simulated fires and associated changes to vegetation composition and distribution. Our results suggest that shorter fire frequencies (i.e., less time between recurring fires) on the winter range of the Nelchina caribou herd in eastern interior Alaska will result in large decreases of available winter habitat, relative to that currently available, in both the short and long term. A 30% shortening of the fire frequency resulted in a 3.5‐fold increase in the area burned annually and an associated 41% decrease in the amount of spruce–lichen forest found on the landscape. More importantly, simulations with more frequent fires produced a relatively immature forest age structure, compared to that which currently exists, with few stands older than 100 years. This age structure is at the lower limits of stand age classes preferred by caribou from the Nelchina herd. Projected changes in fire regime due to climate warming and/or additional prescribed burning could substantially alter the winter habitat of caribou in interior Alaska and lead to changes in winter range use and/or population dynamics.</span></p>","language":"English","publisher":"Ecological Society of America","doi":"10.1890/1051-0761(2006)016[1730:STIOVF]2.0.CO;2","usgsCitation":"Rupp, T., Olson, M., Adams, L., Dale, B.W., Joly, K., Henkelman, J., Collins, W.B., and Starfield, A.M., 2006, Simulating the influences of various fire regimes on caribou winter habitat: Ecological Applications, v. 16, no. 5, p. 1730-1743, https://doi.org/10.1890/1051-0761(2006)016[1730:STIOVF]2.0.CO;2.","productDescription":"14 p.","startPage":"1730","endPage":"1743","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":477373,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1890/1051-0761(2006)016[1730:stiovf]2.0.co;2","text":"Publisher Index Page"},{"id":237164,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8fdbe4b08c986b31919d","contributors":{"authors":[{"text":"Rupp, T. Scott","contributorId":21395,"corporation":false,"usgs":true,"family":"Rupp","given":"T. Scott","affiliations":[],"preferred":false,"id":417148,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Olson, Mark","contributorId":91009,"corporation":false,"usgs":true,"family":"Olson","given":"Mark","affiliations":[],"preferred":false,"id":417143,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Adams, Layne G. 0000-0001-6212-2896 ladams@usgs.gov","orcid":"https://orcid.org/0000-0001-6212-2896","contributorId":2776,"corporation":false,"usgs":true,"family":"Adams","given":"Layne G.","email":"ladams@usgs.gov","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":417150,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dale, Bruce W.","contributorId":6769,"corporation":false,"usgs":true,"family":"Dale","given":"Bruce","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":417144,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Joly, Kyle","contributorId":53117,"corporation":false,"usgs":false,"family":"Joly","given":"Kyle","email":"","affiliations":[{"id":12462,"text":"U.S. Department of the Interior, National Park Service","active":true,"usgs":false}],"preferred":false,"id":417145,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Henkelman, Jonathan","contributorId":55196,"corporation":false,"usgs":false,"family":"Henkelman","given":"Jonathan","email":"","affiliations":[],"preferred":false,"id":417146,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Collins, William B.","contributorId":190452,"corporation":false,"usgs":false,"family":"Collins","given":"William","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":417147,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Starfield, Anthony M.","contributorId":17142,"corporation":false,"usgs":true,"family":"Starfield","given":"Anthony","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":417149,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70028120,"text":"70028120 - 2006 - Persistence of 10-year old Exxon Valdez oil on Gulf of Alaska beaches: The importance of boulder-armoring","interactions":[],"lastModifiedDate":"2017-03-08T12:21:51","indexId":"70028120","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2676,"text":"Marine Pollution Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Persistence of 10-year old Exxon Valdez oil on Gulf of Alaska beaches: The importance of boulder-armoring","docAbstract":"<p>Oil stranded as a result of the 1989 Exxon Valdez spill has persisted for &gt;10 years at study sites on Gulf of Alaska shores distant from the spill's origin. These sites were contaminated by \"oil mousse\", which persists in these settings due to armoring of underlying sediments and their included oil beneath boulders. The boulder-armored beaches that we resampled in 1999 showed continued contamination by subsurface oil, despite their exposure to moderate to high wave energies. Significant declines in surface oil cover occurred at all study sites. In contrast, mousse has persisted under boulders in amounts similar to what was present in 1994 and probably in 1989. Especially striking is the general lack of weathering of this subsurface oil over the last decade. Oil at five of the six armored-beach sites 10 years after the spill is compositionally similar to 11-day old Exxon Valdez oil. Analysis of movements in the boulder-armor that covers the study beaches reveals that only minor shifts have occurred since 1994, suggesting that over the last five, and probably over the last 10 years, boulder-armors have remained largely unmoved at the study sites. These findings emphasize the importance of particular geomorphic parameters in determining stranded oil persistence. Surface armoring, combined with stranding of oil mousse, results in the unexpectedly lengthy persistence of only lightly to moderately weathered oil within otherwise high-energy wave environments.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.marpolbul.2006.01.005","issn":"0025326X","usgsCitation":"Irvine, G.V., Mann, D.H., and Short, J.W., 2006, Persistence of 10-year old Exxon Valdez oil on Gulf of Alaska beaches: The importance of boulder-armoring: Marine Pollution Bulletin, v. 52, no. 9, p. 1011-1022, https://doi.org/10.1016/j.marpolbul.2006.01.005.","productDescription":"12 p.","startPage":"1011","endPage":"1022","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"links":[{"id":236982,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Cook Inlet, Gulf of Alaska, Prince William Sound","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -157.91748046875,\n              56.18225387824831\n            ],\n            [\n              -145.5908203125,\n              56.18225387824831\n            ],\n            [\n              -145.5908203125,\n              61.7419302246182\n            ],\n            [\n              -157.91748046875,\n              61.7419302246182\n            ],\n            [\n              -157.91748046875,\n              56.18225387824831\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"52","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a76e0e4b0c8380cd7836a","contributors":{"authors":[{"text":"Irvine, Gail V. girvine@usgs.gov","contributorId":2368,"corporation":false,"usgs":true,"family":"Irvine","given":"Gail","email":"girvine@usgs.gov","middleInitial":"V.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":416639,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mann, Daniel H.","contributorId":67010,"corporation":false,"usgs":true,"family":"Mann","given":"Daniel","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":416637,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Short, Jeffrey W.","contributorId":26602,"corporation":false,"usgs":true,"family":"Short","given":"Jeffrey","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":416638,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70028042,"text":"70028042 - 2006 - Application of environmental tracers to mixing, evolution, and nitrate contamination of ground water in Jeju Island, Korea","interactions":[],"lastModifiedDate":"2018-10-22T10:37:28","indexId":"70028042","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Application of environmental tracers to mixing, evolution, and nitrate contamination of ground water in Jeju Island, Korea","docAbstract":"<div id=\"abstracts\" class=\"Abstracts\"><div id=\"aep-abstract-id22\" class=\"abstract author\" lang=\"en\"><div id=\"aep-abstract-sec-id23\"><p>Tritium/helium-3 (<sup>3</sup>H/<sup>3</sup><span>He) and chlorofluorocarbons (CFCs) were investigated as environmental tracers in ground water from Jeju Island (Republic of Korea), a basaltic&nbsp;volcanic island. Ground-water mixing was evaluated by comparing&nbsp;</span><sup>3</sup>H and CFC-12 concentrations with lumped-parameter dispersion models, which distinguished old water recharged before the 1950s with negligible<span>&nbsp;</span><sup>3</sup>H and CFC-12 from younger water. Low<span>&nbsp;</span><sup>3</sup><span>H levels in a considerable number of samples cannot be explained by the mixing models, and were interpreted as binary mixing of old and younger water; a process also identified in&nbsp;alkalinity&nbsp;and pH of ground water. The ground-water CFC-12 age is much older in water from wells completed in confined zones of the hydro-volcanic Seogwipo Formation in coastal areas than in water from the basaltic&nbsp;aquifer. Major&nbsp;cation&nbsp;concentrations are much higher in young water with high&nbsp;nitrate&nbsp;than those in uncontaminated old water.&nbsp;Chemical evolution&nbsp;of ground water resulting from&nbsp;silicate&nbsp;weathering in basaltic rocks reaches the zeolite–smectite phase boundary. The&nbsp;calcite&nbsp;saturation state of ground water increases with the CFC-12 apparent (piston flow) age. In agricultural areas, the temporal trend of nitrate concentration in ground water is consistent with the known history of&nbsp;chemical fertilizer&nbsp;use on the island, but increase of nitrate concentration in ground water is more abrupt after the late 1970s compared with the exponential growth of nitrogen inputs.</span></p></div></div></div>","language":"English","publisher":"Elsevier","doi":"10.1016/j.jhydrol.2005.11.021","issn":"00221694","usgsCitation":"Koh, D., Plummer, N., Kip, S.D., Busenberg, E., Kim, Y., and Chang, H., 2006, Application of environmental tracers to mixing, evolution, and nitrate contamination of ground water in Jeju Island, Korea: Journal of Hydrology, v. 327, no. 1-2, p. 258-275, https://doi.org/10.1016/j.jhydrol.2005.11.021.","productDescription":"18 p.","startPage":"258","endPage":"275","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":236803,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":210015,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2005.11.021"}],"country":"Korea","otherGeospatial":"Jeju Island","volume":"327","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ec9ee4b0c8380cd493a8","contributors":{"authors":[{"text":"Koh, D.-C.","contributorId":103066,"corporation":false,"usgs":true,"family":"Koh","given":"D.-C.","affiliations":[],"preferred":false,"id":416272,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Plummer, Niel 0000-0002-4020-1013 nplummer@usgs.gov","orcid":"https://orcid.org/0000-0002-4020-1013","contributorId":190100,"corporation":false,"usgs":true,"family":"Plummer","given":"Niel","email":"nplummer@usgs.gov","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":416271,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kip, Solomon D.","contributorId":107484,"corporation":false,"usgs":true,"family":"Kip","given":"Solomon","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":416273,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Busenberg, E.","contributorId":56796,"corporation":false,"usgs":true,"family":"Busenberg","given":"E.","affiliations":[],"preferred":false,"id":416270,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kim, Y.-J.","contributorId":16208,"corporation":false,"usgs":true,"family":"Kim","given":"Y.-J.","email":"","affiliations":[],"preferred":false,"id":416269,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Chang, H.-W.","contributorId":7067,"corporation":false,"usgs":true,"family":"Chang","given":"H.-W.","email":"","affiliations":[],"preferred":false,"id":416268,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":76063,"text":"fs20063036 - 2006 - National Institute of Invasive Species Science (NIISS)","interactions":[],"lastModifiedDate":"2016-05-26T14:50:47","indexId":"fs20063036","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":313,"text":"Fact Sheet","code":"FS","onlineIssn":"2327-6932","printIssn":"2327-6916","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-3036","title":"National Institute of Invasive Species Science (NIISS)","docAbstract":"<p>The National Institute of Invasive Species Science (www.NIISS.org) is a consortium of governmental and nongovernmental partners, led by the U.S. Geological Survey (USGS), whose aim is to provide reliable information and advanced decision support tools for documenting, understanding, predicting, assessing, and addressing the threat of invasive species in the United States. The Institute coordinates the National Aeronautical and Space Administrationa??s (NASAa??s) Invasive Species National Application activities for the Department of the Interior and has al lead role in developing NASA-derived remote sensing and landscape-scale predictive modeling capabilities for the invasive species community.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/fs20063036","usgsCitation":"Stohlgren, T., 2006, National Institute of Invasive Species Science (NIISS): U.S. Geological Survey Fact Sheet 2006-3036, 2 p., https://doi.org/10.3133/fs20063036.","productDescription":"2 p.","onlineOnly":"Y","additionalOnlineFiles":"N","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":121348,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/fs_2006_3036.jpg"},{"id":320223,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/fs/2006/3036/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b01e4b07f02db6987c7","contributors":{"authors":[{"text":"Stohlgren, Tom","contributorId":24037,"corporation":false,"usgs":true,"family":"Stohlgren","given":"Tom","email":"","affiliations":[],"preferred":false,"id":287050,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70028079,"text":"70028079 - 2006 - Confirmation of a meteoritic component in impact-melt rocks of the Chesapeake Bay impact structure, Virginia, USA - Evidence from osmium isotopic and PGE systematics","interactions":[],"lastModifiedDate":"2012-03-12T17:20:43","indexId":"70028079","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2715,"text":"Meteoritics and Planetary Science","active":true,"publicationSubtype":{"id":10}},"title":"Confirmation of a meteoritic component in impact-melt rocks of the Chesapeake Bay impact structure, Virginia, USA - Evidence from osmium isotopic and PGE systematics","docAbstract":"The osmium isotope ratios and platinum-group element (PGE) concentrations of impact-melt rocks in the Chesapeake Bay impact structure were determined. The impact-melt rocks come from the cored part of a lower-crater section of suevitic crystalline-clast breccia in an 823 m scientific test hole over the central uplift at Cape Charles, Virginia. The 187Os/188Os ratios of impact-melt rocks range from 0.151 to 0.518. The rhenium and platinum-group element (PGE) concentrations of these rocks are 30-270?? higher than concentrations in basement gneiss, and together with the osmium isotopes indicate a substantial meteoritic component in some impact-melt rocks. Because the PGE abundances in the impact-melt rocks are dominated by the target materials, interelemental ratios of the impact-melt rocks are highly variable and nonchondritic. The chemical nature of the projectile for the Chesapeake Bay impact structure cannot be constrained at this time. Model mixing calculations between chondritic and crustal components suggest that most impact-melt rocks include a bulk meteoritic component of 0.01-0.1% by mass. Several impact-melt rocks with lowest initial 187Os/188Os ratios and the highest osmium concentrations could have been produced by additions of 0.1%-0.2% of a meteoritic component. In these samples, as much as 70% of the total Os may be of meteoritic origin. At the calculated proportions of a meteoritic component (0.01-0.1% by mass), no mixtures of the investigated target rocks and sediments can reproduce the observed PGE abundances of the impact-melt rocks, suggesting that other PGE enrichment processes operated along with the meteoritic contamination. Possible explanations are 1) participation of unsampled target materials with high PGE abundances in the impact-melt rocks, and 2) variable fractionations of PGE during syn- to post-impact events. ?? The Meteoritical Society, 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Meteoritics and Planetary Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"10869379","usgsCitation":"Lee, S., Horton, J.W., and Walker, R., 2006, Confirmation of a meteoritic component in impact-melt rocks of the Chesapeake Bay impact structure, Virginia, USA - Evidence from osmium isotopic and PGE systematics: Meteoritics and Planetary Science, v. 41, no. 6, p. 819-833.","startPage":"819","endPage":"833","numberOfPages":"15","costCenters":[],"links":[{"id":236838,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f9c3e4b0c8380cd4d77e","contributors":{"authors":[{"text":"Lee, S.R.","contributorId":53148,"corporation":false,"usgs":true,"family":"Lee","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":416434,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Horton, J. Wright Jr. 0000-0001-6756-6365 whorton@usgs.gov","orcid":"https://orcid.org/0000-0001-6756-6365","contributorId":81184,"corporation":false,"usgs":true,"family":"Horton","given":"J.","suffix":"Jr.","email":"whorton@usgs.gov","middleInitial":"Wright","affiliations":[],"preferred":false,"id":416435,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Walker, R.J.","contributorId":105859,"corporation":false,"usgs":true,"family":"Walker","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":416436,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70028270,"text":"70028270 - 2006 - Modeling regional initiation of rainfall-induced shallow landslides in the eastern Umbria Region of central Italy","interactions":[],"lastModifiedDate":"2012-03-12T17:20:52","indexId":"70028270","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2604,"text":"Landslides","active":true,"publicationSubtype":{"id":10}},"title":"Modeling regional initiation of rainfall-induced shallow landslides in the eastern Umbria Region of central Italy","docAbstract":"We model the rainfall-induced initiation of shallow landslides over a broad region using a deterministic approach, the Transient Rainfall Infiltration and Grid-based Slope-stability (TRIGRS) model that couples an infinite-slope stability analysis with a one-dimensional analytical solution for transient pore pressure response to rainfall infiltration. This model permits the evaluation of regional shallow landslide susceptibility in a Geographic Information System framework, and we use it to analyze susceptibility to shallow landslides in an area in the eastern Umbria Region of central Italy. As shown on a landslide inventory map produced by the Italian National Research Council, the area has been affected in the past by shallow landslides, many of which have transformed into debris flows. Input data for the TRIGRS model include time-varying rainfall, topographic slope, colluvial thickness, initial water table depth, and material strength and hydraulic properties. Because of a paucity of input data, we focus on parametric analyses to calibrate and test the model and show the effect of variation in material properties and initial water table conditions on the distribution of simulated instability in the study area in response to realistic rainfall. Comparing the results with the shallow landslide inventory map, we find more than 80% agreement between predicted shallow landslide susceptibility and the inventory, despite the paucity of input data.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Landslides","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10346-006-0037-0","issn":"1612510X","usgsCitation":"Salciarini, D., Godt, J., Savage, W.Z., Conversini, P., Baum, R., and Michael, J.A., 2006, Modeling regional initiation of rainfall-induced shallow landslides in the eastern Umbria Region of central Italy: Landslides, v. 3, no. 3, p. 181-194, https://doi.org/10.1007/s10346-006-0037-0.","startPage":"181","endPage":"194","numberOfPages":"14","costCenters":[],"links":[{"id":210345,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10346-006-0037-0"},{"id":237238,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","issue":"3","noUsgsAuthors":false,"publicationDate":"2006-05-30","publicationStatus":"PW","scienceBaseUri":"505a5c21e4b0c8380cd6fa6b","contributors":{"authors":[{"text":"Salciarini, D.","contributorId":59255,"corporation":false,"usgs":true,"family":"Salciarini","given":"D.","affiliations":[],"preferred":false,"id":417327,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Godt, J. W.","contributorId":76732,"corporation":false,"usgs":true,"family":"Godt","given":"J. W.","affiliations":[],"preferred":false,"id":417330,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Savage, W. Z.","contributorId":106481,"corporation":false,"usgs":true,"family":"Savage","given":"W.","email":"","middleInitial":"Z.","affiliations":[],"preferred":false,"id":417331,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Conversini, P.","contributorId":59307,"corporation":false,"usgs":true,"family":"Conversini","given":"P.","affiliations":[],"preferred":false,"id":417328,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Baum, R.L.","contributorId":68752,"corporation":false,"usgs":true,"family":"Baum","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":417329,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Michael, J. A.","contributorId":48567,"corporation":false,"usgs":true,"family":"Michael","given":"J.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":417326,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70028128,"text":"70028128 - 2006 - Age model for a continuous, ca 250-ka Quaternary lacustrine record from Bear Lake, Utah-Idaho","interactions":[],"lastModifiedDate":"2017-08-16T09:04:24","indexId":"70028128","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3219,"text":"Quaternary Science Reviews","active":true,"publicationSubtype":{"id":10}},"title":"Age model for a continuous, ca 250-ka Quaternary lacustrine record from Bear Lake, Utah-Idaho","docAbstract":"<p>The Quaternary sediments sampled by continuous 120-m-long drill cores from Bear Lake (Utah-Idaho) comprise one of the longest lacustrine sequences recovered from an extant lake. The cores serve as a good case study for the construction of an age model for sequences that extend beyond the range of radiocarbon dating. From a variety of potential age indicators, we selected a combination of radiocarbon ages, one magnetic excursion (correlated to a standard sequence), and a single Uranium-series age to develop an initial data set. The reliability of the excursion and U-series data require consideration of their position with respect to sediments of inferred interglacial character, but not direct correlation with other paleoclimate records. Data omitted from the age model include amino acid age estimates, which have a large amount of scatter, and tephrochronology correlations, which have relatively large uncertainties.</p>\n<br>\n<p>Because the initial data set was restricted to the upper half of the BL00-1 core, we inferred additional ages by direct correlation to the independently dated paleoclimate record from Devils Hole. We developed an age model for the entire core using statistical methods that consider both the uncertainties of the original data and that of the curve-fitting process, with a combination of our initial data set and the climate correlations as control points. This age model represents our best estimate of the chronology of deposition in Bear Lake. Because the age model contains assumptions about the correlation of Bear Lake to other climate records, the model cannot be used to address some paleoclimate questions, such as phase relationships with other areas.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Science Reviews","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.quascirev.2005.10.015","issn":"02773791","usgsCitation":"Colman, S.M., Kaufman, D.S., Bright, J., Heil, C., King, J., Dean, W., Rosenbaum, J.G., Forester, R.M., Bischoff, J.L., Perkins, M., and McGeehin, J., 2006, Age model for a continuous, ca 250-ka Quaternary lacustrine record from Bear Lake, Utah-Idaho: Quaternary Science Reviews, v. 25, no. 17-18, p. 2271-2282, https://doi.org/10.1016/j.quascirev.2005.10.015.","productDescription":"12 p.","startPage":"2271","endPage":"2282","numberOfPages":"12","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true},{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":487567,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://digitalcommons.uri.edu/gsofacpubs/1723","text":"External Repository"},{"id":237126,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":210257,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.quascirev.2005.10.015"}],"country":"United States","state":"Idaho, Utah","otherGeospatial":"Bear Lake","volume":"25","issue":"17-18","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e8ece4b0c8380cd47f95","contributors":{"authors":[{"text":"Colman, Steven M. 0000-0002-0564-9576","orcid":"https://orcid.org/0000-0002-0564-9576","contributorId":77482,"corporation":false,"usgs":true,"family":"Colman","given":"Steven","email":"","middleInitial":"M.","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":416670,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kaufman, D. S.","contributorId":18006,"corporation":false,"usgs":false,"family":"Kaufman","given":"D.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":416662,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bright, Jordon","contributorId":63981,"corporation":false,"usgs":false,"family":"Bright","given":"Jordon","affiliations":[{"id":7042,"text":"University of Arizona","active":true,"usgs":false}],"preferred":false,"id":416667,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Heil, C.","contributorId":68954,"corporation":false,"usgs":true,"family":"Heil","given":"C.","email":"","affiliations":[],"preferred":false,"id":416668,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"King, J.W.","contributorId":19265,"corporation":false,"usgs":true,"family":"King","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":416663,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Dean, W.E.","contributorId":97099,"corporation":false,"usgs":true,"family":"Dean","given":"W.E.","email":"","affiliations":[],"preferred":false,"id":416672,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Rosenbaum, J. G.","contributorId":96685,"corporation":false,"usgs":true,"family":"Rosenbaum","given":"J.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":416671,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Forester, R. M.","contributorId":76332,"corporation":false,"usgs":true,"family":"Forester","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":416669,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Bischoff, J. L.","contributorId":28969,"corporation":false,"usgs":true,"family":"Bischoff","given":"J.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":416665,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Perkins, Marie","contributorId":22957,"corporation":false,"usgs":false,"family":"Perkins","given":"Marie","email":"","affiliations":[],"preferred":false,"id":416664,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"McGeehin, J. P. 0000-0002-5320-6091","orcid":"https://orcid.org/0000-0002-5320-6091","contributorId":48593,"corporation":false,"usgs":true,"family":"McGeehin","given":"J. P.","affiliations":[],"preferred":false,"id":416666,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}}
,{"id":70028263,"text":"70028263 - 2006 - Homogeneity of small-scale earthquake faulting, stress, and fault strength","interactions":[],"lastModifiedDate":"2012-03-12T17:20:52","indexId":"70028263","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Homogeneity of small-scale earthquake faulting, stress, and fault strength","docAbstract":"Small-scale faulting at seismogenic depths in the crust appears to be more homogeneous than previously thought. I study three new high-quality focal-mechanism datasets of small (M < ??? 3) earthquakes in southern California, the east San Francisco Bay, and the aftershock sequence of the 1989 Loma Prieta earthquake. I quantify the degree of mechanism variability on a range of length scales by comparing the hypocentral disctance between every pair of events and the angular difference between their focal mechanisms. Closely spaced earthquakes (interhypocentral distance <???2 km) tend to have very similar focal mechanisms, often identical to within the 1-sigma uncertainty of ???25??. This observed similarity implies that in small volumes of crust, while faults of many orientations may or may not be present, only similarly oriented fault planes produce earthquakes contemporaneously. On these short length scales, the crustal stress orientation and fault strength (coefficient of friction) are inferred to be homogeneous as well, to produce such similar earthquakes. Over larger length scales (???2-50 km), focal mechanisms become more diverse with increasing interhypocentral distance (differing on average by 40-70??). Mechanism variability on ???2- to 50 km length scales can be explained by ralatively small variations (???30%) in stress or fault strength. It is possible that most of this small apparent heterogeneity in stress of strength comes from measurement error in the focal mechanisms, as negligibble variation in stress or fault strength (<10%) is needed if each earthquake is assigned the optimally oriented focal mechanism within the 1-sigma confidence region. This local homogeneity in stress orientation and fault strength is encouraging, implying it may be possible to measure these parameters with enough precision to be useful in studying and modeling large earthquakes.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the Seismological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1785/0120050257","issn":"00371106","usgsCitation":"Hardebeck, J., 2006, Homogeneity of small-scale earthquake faulting, stress, and fault strength: Bulletin of the Seismological Society of America, v. 96, no. 5, p. 1675-1688, https://doi.org/10.1785/0120050257.","startPage":"1675","endPage":"1688","numberOfPages":"14","costCenters":[],"links":[{"id":210287,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120050257"},{"id":237165,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"96","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3212e4b0c8380cd5e4d1","contributors":{"authors":[{"text":"Hardebeck, J.L.","contributorId":98862,"corporation":false,"usgs":true,"family":"Hardebeck","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":417295,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70028086,"text":"70028086 - 2006 - Modeling of gene expression pattern alteration by <i>p,p′</i>-DDE and dieldrin in largemouth bass","interactions":[],"lastModifiedDate":"2015-04-20T09:02:41","indexId":"70028086","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2664,"text":"Marine Environmental Research","active":true,"publicationSubtype":{"id":10}},"title":"Modeling of gene expression pattern alteration by <i>p,p′</i>-DDE and dieldrin in largemouth bass","docAbstract":"<p>In this study, largemouth bass (LMB) were subchronically exposed to <i>p</i>,<i>p</i>&prime;-DDE or dieldrin in their diet to evaluate the effect of exposure on expression of genes involved in reproduction and steroid homeostasis. Using real-time PCR, we detected a different gene expression pattern for each OCP, suggesting that they each affect LMB in a different way. We also detected a different expression pattern among sexes, suggesting that sexes are affected differently by OCPs perhaps reflecting the different adaptive responses of each sex to dysregulation caused by OCP exposure.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.marenvres.2006.04.049","issn":"01411136","usgsCitation":"Garcia-Reyero, N., Barber, D., Gross, T., and Denslow, N., 2006, Modeling of gene expression pattern alteration by <i>p,p′</i>-DDE and dieldrin in largemouth bass: Marine Environmental Research, v. 62, no. SUPPL. 1, p. 415-419, https://doi.org/10.1016/j.marenvres.2006.04.049.","productDescription":"5 p.","startPage":"415","endPage":"419","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":477467,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://www.ncbi.nlm.nih.gov/pmc/articles/1810567","text":"External Repository"},{"id":236945,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":210119,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.marenvres.2006.04.049"}],"volume":"62","issue":"SUPPL. 1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5c14e4b0c8380cd6f9fb","contributors":{"authors":[{"text":"Garcia-Reyero, Natalia","contributorId":43961,"corporation":false,"usgs":false,"family":"Garcia-Reyero","given":"Natalia","affiliations":[{"id":17848,"text":"Mississippi State University","active":true,"usgs":false},{"id":26924,"text":"USArmy Engineer Research and Development Center, Vicksburg, MS","active":true,"usgs":false}],"preferred":false,"id":416482,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Barber, David","contributorId":19747,"corporation":false,"usgs":true,"family":"Barber","given":"David","affiliations":[],"preferred":false,"id":416479,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gross, Timothy","contributorId":40390,"corporation":false,"usgs":true,"family":"Gross","given":"Timothy","affiliations":[],"preferred":false,"id":416481,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Denslow, Nancy","contributorId":26268,"corporation":false,"usgs":true,"family":"Denslow","given":"Nancy","affiliations":[],"preferred":false,"id":416480,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70028241,"text":"70028241 - 2006 - Influence of deflection on a fold-to-fault progression: field evidence from near Marietta, South Carolina","interactions":[],"lastModifiedDate":"2012-03-12T17:20:52","indexId":"70028241","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2468,"text":"Journal of Structural Geology","active":true,"publicationSubtype":{"id":10}},"title":"Influence of deflection on a fold-to-fault progression: field evidence from near Marietta, South Carolina","docAbstract":"Four periods of deformation (D1-D4) are recognized in the Lion Park Road borrow pit near Marietta, South Carolina. Although each period is characterized by distinct structures, D3 produced two structural styles (D3a, D3b) resulting from layer-parallel shortening. D3a is characterized by detachment folding at the tip of an underlying thrust. D3b is a fold-to-fault progression that was localized by east-dipping, quartz-filled gash fractures. The fold-to-fault progression demonstrates the influence of a mechanical anisotropy on ramp development. The early stages of D3b were formed by deflection of northwest-directed, layer-parallel shortening and active, down-section propagation of folds and thrusts. Following connection with a splay of basal detachment, later D3b stages resulted from up-section movement that produced kink folding and a throughgoing thrust. This up-section movement deformed and modified the geometries of older, down-section structures. Detailed mesoscopic field observations, integrated with a combination of current thrust fault models, are used to interpret the D3b fold-to-fault progression. ?? 2006 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Structural Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jsg.2005.12.005","issn":"01918141","usgsCitation":"Clendenin, C., and Garihan, J., 2006, Influence of deflection on a fold-to-fault progression: field evidence from near Marietta, South Carolina: Journal of Structural Geology, v. 28, no. 7, p. 1316-1326, https://doi.org/10.1016/j.jsg.2005.12.005.","startPage":"1316","endPage":"1326","numberOfPages":"11","costCenters":[],"links":[{"id":210425,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jsg.2005.12.005"},{"id":237338,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"28","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3b20e4b0c8380cd62258","contributors":{"authors":[{"text":"Clendenin, C.W.","contributorId":48723,"corporation":false,"usgs":true,"family":"Clendenin","given":"C.W.","email":"","affiliations":[],"preferred":false,"id":417192,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Garihan, J.M.","contributorId":84145,"corporation":false,"usgs":true,"family":"Garihan","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":417193,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70028261,"text":"70028261 - 2006 - Modeling the probability of arsenic in groundwater in New England as a tool for exposure assessment","interactions":[],"lastModifiedDate":"2012-03-12T17:20:43","indexId":"70028261","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Modeling the probability of arsenic in groundwater in New England as a tool for exposure assessment","docAbstract":"We developed a process-based model to predict the probability of arsenic exceeding 5 ??g/L in drinking water wells in New England bedrock aquifers. The model is being used for exposure assessment in an epidemiologic study of bladder cancer. One important study hypothesis that may explain increased bladder cancer risk is elevated concentrations of inorganic arsenic in drinking water. In eastern New England, 20-30% of private wells exceed the arsenic drinking water standard of 10 micrograms per liter. Our predictive model significantly improves the understanding of factors associated with arsenic contamination in New England. Specific rock types, high arsenic concentrations in stream sediments, geochemical factors related to areas of Pleistocene marine inundation and proximity to intrusive granitic plutons, and hydrologic and landscape variables relating to groundwater residence time increase the probability of arsenic occurrence in groundwater. Previous studies suggest that arsenic in bedrock groundwater may be partly from past arsenical pesticide use. Variables representing historic agricultural inputs do not improve the model, indicating that this source does not significantly contribute to current arsenic concentrations. Due to the complexity of the fractured bedrock aquifers in the region, well depth and related variables also are not significant predictors. ?? 2006 American Chemical Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Science and Technology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1021/es051972f","issn":"0013936X","usgsCitation":"Ayotte, J., Nolan, B.T., Nuckols, J., Cantor, K., Robinson, G., Baris, D., Hayes, L., Karagas, M., Bress, W., Silverman, D., and Lubin, J., 2006, Modeling the probability of arsenic in groundwater in New England as a tool for exposure assessment: Environmental Science & Technology, v. 40, no. 11, p. 3578-3585, https://doi.org/10.1021/es051972f.","startPage":"3578","endPage":"3585","numberOfPages":"8","costCenters":[],"links":[{"id":210266,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es051972f"},{"id":237135,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"40","issue":"11","noUsgsAuthors":false,"publicationDate":"2006-04-25","publicationStatus":"PW","scienceBaseUri":"505a5c4de4b0c8380cd6fba6","contributors":{"authors":[{"text":"Ayotte, J. D.","contributorId":96667,"corporation":false,"usgs":true,"family":"Ayotte","given":"J. D.","affiliations":[],"preferred":false,"id":417287,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Nolan, B. T.","contributorId":21565,"corporation":false,"usgs":true,"family":"Nolan","given":"B.","email":"","middleInitial":"T.","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":417283,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nuckols, J.R.","contributorId":85385,"corporation":false,"usgs":true,"family":"Nuckols","given":"J.R.","affiliations":[],"preferred":false,"id":417286,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cantor, K.P.","contributorId":11401,"corporation":false,"usgs":true,"family":"Cantor","given":"K.P.","email":"","affiliations":[],"preferred":false,"id":417281,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Robinson, G.R. Jr. 0000-0002-9676-9564","orcid":"https://orcid.org/0000-0002-9676-9564","contributorId":6444,"corporation":false,"usgs":true,"family":"Robinson","given":"G.R.","suffix":"Jr.","affiliations":[],"preferred":false,"id":417280,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Baris, D.","contributorId":68092,"corporation":false,"usgs":true,"family":"Baris","given":"D.","email":"","affiliations":[],"preferred":false,"id":417285,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Hayes, L.","contributorId":98938,"corporation":false,"usgs":true,"family":"Hayes","given":"L.","affiliations":[],"preferred":false,"id":417288,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Karagas, M.","contributorId":30428,"corporation":false,"usgs":true,"family":"Karagas","given":"M.","email":"","affiliations":[],"preferred":false,"id":417284,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Bress, W.","contributorId":100179,"corporation":false,"usgs":true,"family":"Bress","given":"W.","affiliations":[],"preferred":false,"id":417289,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Silverman, D.T.","contributorId":104275,"corporation":false,"usgs":true,"family":"Silverman","given":"D.T.","email":"","affiliations":[],"preferred":false,"id":417290,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Lubin, J.H.","contributorId":14184,"corporation":false,"usgs":true,"family":"Lubin","given":"J.H.","email":"","affiliations":[],"preferred":false,"id":417282,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}}
,{"id":70028184,"text":"70028184 - 2006 - Foraging patterns and prey selection in an increasing and expanding sea otter population","interactions":[],"lastModifiedDate":"2012-03-12T17:20:43","indexId":"70028184","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2373,"text":"Journal of Mammalogy","onlineIssn":"1545-1542","printIssn":"0022-2372","active":true,"publicationSubtype":{"id":10}},"title":"Foraging patterns and prey selection in an increasing and expanding sea otter population","docAbstract":"Focal observations of sea otter (Enhydra lutris kenyoni) foraging patterns and prey selection were collected in coastal Washington between 1993 and 1999. Records consisted of 13,847 individual dives from 841 feeding bouts ranging from 1 min to >4 h. Average dive time was 55 s ?? 0.9 SE and average surface time was 45 s ?? 2.3 SE, irrespective of dive success. At least 77% of all dives (n = 10,636) were successful prey captures (dives in low light or of undetermined success were excluded). Prey capture success was significantly lower for subadults (63% ?? 5 SE) than adults (82% ?? 1 SE; P < 0.001). Sea otters occupying the established population range on the outer coast of Washington fed heavily on bivalves (63%) and had a diverse diet consisting of several prey groups (n = 10). In contrast, sea otters occupying new habitat in the Strait of Juan de Fuca had a restricted diet dominated by >60% red urchins (Strongylocentrotus franciscanus), with only 2 other prey species comprising >10% of their diet. Prey size and prey category were dominant predictor variables in generalized linear models of dive duration and postdive surface duration on successful dives. Significant increases in areal extent of surface canopy of giant kelp (Macrocystis integrifolia) and bull kelp (Nereocystis leutkeana) were found both in the outer coast and the Strait of Juan de Fuca (0.4-0.5 km2 per year, P < 0.05) and suggest increasing suitable habitat for a growing population. The growth and expansion of a small and isolated sea otter population provides a unique opportunity to examine the relationship between dietary diversity and population status and explore similarities and differences between trophic paradigms established for sea otter populations at other localities. ?? 2006 American Society of Mammalogists.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Mammalogy","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1644/05-MAMM-A-244R2.1","issn":"00222372","usgsCitation":"Laidre, K., and Jameson, R., 2006, Foraging patterns and prey selection in an increasing and expanding sea otter population: Journal of Mammalogy, v. 87, no. 4, p. 799-807, https://doi.org/10.1644/05-MAMM-A-244R2.1.","startPage":"799","endPage":"807","numberOfPages":"9","costCenters":[],"links":[{"id":477366,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1644/05-mamm-a-244r2.1","text":"Publisher Index Page"},{"id":210124,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1644/05-MAMM-A-244R2.1"},{"id":236950,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"87","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a12ffe4b0c8380cd5449a","contributors":{"authors":[{"text":"Laidre, K.L.","contributorId":88319,"corporation":false,"usgs":true,"family":"Laidre","given":"K.L.","email":"","affiliations":[],"preferred":false,"id":416950,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jameson, R.J.","contributorId":56581,"corporation":false,"usgs":true,"family":"Jameson","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":416949,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70028103,"text":"70028103 - 2006 - Chesapeake Bay impact structure: Morphology, crater fill, and relevance for impact structures on Mars","interactions":[],"lastModifiedDate":"2012-03-12T17:20:51","indexId":"70028103","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2715,"text":"Meteoritics and Planetary Science","active":true,"publicationSubtype":{"id":10}},"title":"Chesapeake Bay impact structure: Morphology, crater fill, and relevance for impact structures on Mars","docAbstract":"The late Eocene Chesapeake Bay impact structure (CBIS) on the Atlantic margin of Virginia is one of the largest and best-preserved \"wet-target\" craters on Earth. It provides an accessible analog for studying impact processes in layered and wet targets on volatile-rich planets. The CBIS formed in a layered target of water, weak clastic sediments, and hard crystalline rock. The buried structure consists of a deep, filled central crater, 38 km in width, surrounded by a shallower brim known as the annular trough. The annular trough formed partly by collapse of weak sediments, which expanded the structure to ???85 km in diameter. Such extensive collapse, in addition to excavation processes, can explain the \"inverted sombrero\" morphology observed at some craters in layered targets. The distribution of crater-fill materials i n the CBIS is related to the morphology. Suevitic breccia, including pre-resurge fallback deposits, is found in the central crater. Impact-modified sediments, formed by fluidization and collapse of water-saturated sand and silt-clay, occur in the annular trough. Allogenic sediment-clast breccia, interpreted as ocean-resurge deposits, overlies the other impactites and covers the entire crater beneath a blanket of postimpact sediments. The formation of chaotic terrains on Mars is attributed to collapse due to the release of volatiles from thick layered deposits. Some flat-floored rimless depressions with chaotic infill in these terrains are impact craters that expanded by collapse farther than expected for similar-sized complex craters in solid targets. Studies of crater materials in the CBIS provide insights into processes of crater expansion on Mars and their links to volatiles. ?? The Meteoritical Society, 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Meteoritics and Planetary Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"10869379","usgsCitation":"Horton, J.W., Ormo, J., Powars, D., and Gohn, G.S., 2006, Chesapeake Bay impact structure: Morphology, crater fill, and relevance for impact structures on Mars: Meteoritics and Planetary Science, v. 41, no. 10, p. 1613-1624.","startPage":"1613","endPage":"1624","numberOfPages":"12","costCenters":[],"links":[{"id":237226,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f5b3e4b0c8380cd4c38c","contributors":{"authors":[{"text":"Horton, J. Wright Jr. 0000-0001-6756-6365 whorton@usgs.gov","orcid":"https://orcid.org/0000-0001-6756-6365","contributorId":81184,"corporation":false,"usgs":true,"family":"Horton","given":"J.","suffix":"Jr.","email":"whorton@usgs.gov","middleInitial":"Wright","affiliations":[],"preferred":false,"id":416551,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ormo, J.","contributorId":55626,"corporation":false,"usgs":true,"family":"Ormo","given":"J.","affiliations":[],"preferred":false,"id":416550,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Powars, D.S.","contributorId":7303,"corporation":false,"usgs":true,"family":"Powars","given":"D.S.","affiliations":[],"preferred":false,"id":416548,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gohn, G. S.","contributorId":25937,"corporation":false,"usgs":true,"family":"Gohn","given":"G.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":416549,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70028256,"text":"70028256 - 2006 - Evaluating the relative contributions of hydroperiod and soil fertility on growth of south Florida mangroves","interactions":[],"lastModifiedDate":"2012-03-12T17:20:44","indexId":"70028256","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Evaluating the relative contributions of hydroperiod and soil fertility on growth of south Florida mangroves","docAbstract":"Low and high water periods create contrasting challenges for trees inhabiting periodically flooded wetlands. Low to moderate flood durations and frequencies may bring nutrient subsidies, while greater hydroperiods can be energetically stressful because of oxygen deficiency. We tested the hypothesis that hydroperiod affects the growth of mangrove seedlings and saplings in a greenhouse experiment by varying flood duration while keeping salinity and soil fertility constant. We measured the growth of mangrove trees along a hydroperiod gradient over a two-year period by tracking fine-scale diameter increment. Greenhouse growth studies indicated that under a full range of annual flood durations (0-8760 h/year), hydroperiod alone exerted a significant influence on growth for one species, Laguncularia racemosa, when flooding was imposed for two growing seasons. Field evaluations, on the other hand, indicated that increased flood duration may provide nutrient subsidies for tree growth. Diameter growth was related curvilinearly to site hydroperiod, including flood duration and frequency, as well as to salinity and soil fertility. An analysis of soil physico-chemical parameters suggests that phosphorus fertility, which was also linked directly to hydroperiod, is likely to influence growth on south Florida mangrove sites. The physical removal of phosphorus by greater flood frequencies from upland sources and/or addition of phosphorus from tidal flooding balanced against increased soil aeration and reduced water deficits may be an extremely important growth determinant for south Florida mangroves. ?? Springer 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-006-0139-7","issn":"00188158","usgsCitation":"Krauss, K., Doyle, T., Twilley, R., Rivera-Monroy, V., and Sullivan, J., 2006, Evaluating the relative contributions of hydroperiod and soil fertility on growth of south Florida mangroves: Hydrobiologia, v. 569, no. 1, p. 311-324, https://doi.org/10.1007/s10750-006-0139-7.","startPage":"311","endPage":"324","numberOfPages":"14","costCenters":[],"links":[{"id":210184,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-0139-7"},{"id":237026,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"569","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0bfee4b0c8380cd529b0","contributors":{"authors":[{"text":"Krauss, K. W. 0000-0003-2195-0729","orcid":"https://orcid.org/0000-0003-2195-0729","contributorId":19517,"corporation":false,"usgs":true,"family":"Krauss","given":"K. W.","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":true,"id":417257,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Doyle, T.W. 0000-0001-5754-0671","orcid":"https://orcid.org/0000-0001-5754-0671","contributorId":16783,"corporation":false,"usgs":true,"family":"Doyle","given":"T.W.","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":true,"id":417256,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Twilley, R.R.","contributorId":94647,"corporation":false,"usgs":true,"family":"Twilley","given":"R.R.","email":"","affiliations":[],"preferred":false,"id":417260,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rivera-Monroy, V. H.","contributorId":83243,"corporation":false,"usgs":true,"family":"Rivera-Monroy","given":"V. H.","affiliations":[],"preferred":false,"id":417259,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Sullivan, J.K.","contributorId":68953,"corporation":false,"usgs":true,"family":"Sullivan","given":"J.K.","email":"","affiliations":[],"preferred":false,"id":417258,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70028259,"text":"70028259 - 2006 - Bluff evolution along coastal drumlins: Boston Harbor Islands, Massachusetts","interactions":[],"lastModifiedDate":"2017-08-23T10:57:10","indexId":"70028259","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2220,"text":"Journal of Coastal Research","active":true,"publicationSubtype":{"id":10}},"title":"Bluff evolution along coastal drumlins: Boston Harbor Islands, Massachusetts","docAbstract":"A series of partially drowned drumlins forms the backbone of the inner islands within Boston Harbor. The shoreline of these rounded glacial deposits is composed of actively retreating bluffs formed by continual wave attack. Comparisons of bluffs reveal variability in their height and lateral extent, as well as in the dominant mechanism causing their retreat. Two processes are responsible for bluff erosion and yield distinct bluff morphologies: (1) wave attack undercuts the bluff and causes episodic slumping, yielding planar bluff slopes, and (2) subaerial processes such as rainfall create irregular slopes characterized by rills and gullies. We propose a model of drumlin bluff evolution that is based on processes of erosion and physical characteristics such as bluff height, slope morphology, and the orientation of the bluff with respect to the long axis of the drumlin and its topographic crest. The four phases of drumlin bluff evolution consist of (1) initial formation of bluff, with retreat dominated by wave notching and slumping processes; (2) rill and gully development as bluff heights exceed 10 m and slumped sediment at bluff base inhibits wave attack; (3) return of wave notching and slumping as bluff heights decrease; and (4) final development of boulder retreat lag as last remnants of drumlin are eroded by wave action. These phases capture the important physical processes of drumlin evolution in Boston Harbor and could apply to other eroding coastal drumlin deposits.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Coastal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2112/06A-0005.1","issn":"07490208","usgsCitation":"Himmelstoss, E., FitzGerald, D.M., Rosen, P., and Allen, J., 2006, Bluff evolution along coastal drumlins: Boston Harbor Islands, Massachusetts: Journal of Coastal Research, v. 22, no. 5, p. 1230-1240, https://doi.org/10.2112/06A-0005.1.","productDescription":"11 p.","startPage":"1230","endPage":"1240","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":237097,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Massachusetts","otherGeospatial":"Boston Harbor Islands","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -71.0324478149414,\n              42.32403179535469\n            ],\n            [\n              -71.02180480957031,\n              42.28797686534489\n            ],\n            [\n              -70.93425750732422,\n              42.25977870328815\n            ],\n            [\n              -70.83503723144531,\n              42.27349830394709\n            ],\n            [\n              -70.85220336914062,\n              42.33113878082107\n            ],\n            [\n              -70.87898254394531,\n              42.363110278811256\n            ],\n            [\n              -71.0324478149414,\n              42.32403179535469\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"22","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f1efe4b0c8380cd4aee5","contributors":{"authors":[{"text":"Himmelstoss, E. A.","contributorId":74567,"corporation":false,"usgs":true,"family":"Himmelstoss","given":"E. A.","affiliations":[],"preferred":false,"id":417274,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"FitzGerald, D. M.","contributorId":55038,"corporation":false,"usgs":true,"family":"FitzGerald","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":417273,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rosen, P.S.","contributorId":100539,"corporation":false,"usgs":true,"family":"Rosen","given":"P.S.","email":"","affiliations":[],"preferred":false,"id":417275,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Allen, J.R.","contributorId":16955,"corporation":false,"usgs":true,"family":"Allen","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":417272,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70028116,"text":"70028116 - 2006 - Diurnal time-activity budgets of redheads (Aythya americana) wintering in seagrass beds and coastal ponds in Louisiana and Texas","interactions":[],"lastModifiedDate":"2019-06-17T15:13:31","indexId":"70028116","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Diurnal time-activity budgets of redheads (<i>Aythya americana</i>) wintering in seagrass beds and coastal ponds in Louisiana and Texas","title":"Diurnal time-activity budgets of redheads (Aythya americana) wintering in seagrass beds and coastal ponds in Louisiana and Texas","docAbstract":"<p><span>Diurnal time-activity budgets were determined for wintering redheads (</span><i class=\"EmphasisTypeItalic \">Aythya americana</i><span>) from estuarine seagrass beds in Louisiana (Chandeleur Sound) and Texas (Laguna Madre) and from ponds adjacent to the Laguna Madre. Activities differed (</span><i class=\"EmphasisTypeItalic \">p</i><span>&lt;0.0001) by location, month, and diurnal time period. Resting and feeding were the most frequent activities of redheads at the two estuarine sites, whereas drinking was almost nonexistent. Birds on ponds in Texas engaged most frequently in resting and drinking, but feeding was very infrequent. Redheads from the Louisiana estuarine site rested less than birds in Texas at either the Laguna Madre or freshwater ponds. Redheads in Louisiana fed more than birds in Texas; this was partially because of weather differences (colder temperatures in Louisiana), but the location effect was still significant even when we adjusted the model for weather effects. Redheads in Louisiana showed increased resting and decreased feeding as winter progressed, but redheads in Texas did not exhibit a seasonal pattern in either resting or feeding. In Louisiana, birds maintained a high level of feeding activity during the early morning throughout the winter, whereas afternoon feeding tapered off in mid- to late-winter. Texas birds showed a shift from morning feeding in early winter to afternoon feeding in late winter. Males and females at both Chandeleur Sound and Laguna Madre showed differences in their activities, but because the absolute difference seldom exceeded 2%, biological significance is questionable. Diurnal time-activity budgets of redheads on the wintering grounds are influenced by water salinities and the use of dietary fresh water, as well as by weather conditions, tides, and perhaps vegetation differences between sites. The opportunity to osmoregulate via dietary freshwater, vs. via nasal salt glands, may have a significant effect on behavioral allocations.</span></p>","language":"English","publisher":"Springer Nature","doi":"10.1007/s10750-006-0058-7","issn":"00188158","usgsCitation":"Michot, T., Woodin, M., Adair, S., and Moser, E., 2006, Diurnal time-activity budgets of redheads (Aythya americana) wintering in seagrass beds and coastal ponds in Louisiana and Texas: Hydrobiologia, v. 567, no. 1, p. 113-128, https://doi.org/10.1007/s10750-006-0058-7.","productDescription":"16 p.","startPage":"113","endPage":"128","costCenters":[],"links":[{"id":236911,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Louisiana, Texas","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -97.7178955078125,\n              25.83697740052369\n            ],\n            [\n              -96.98181152343749,\n              25.83697740052369\n            ],\n            [\n              -96.98181152343749,\n              27.868216579514076\n            ],\n            [\n              -97.7178955078125,\n              27.868216579514076\n            ],\n            [\n              -97.7178955078125,\n              25.83697740052369\n            ]\n          ]\n        ]\n      }\n    },\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -90.29388427734375,\n              29.191731712018708\n            ],\n            [\n              -89.17739868164062,\n              29.191731712018708\n            ],\n            [\n              -89.17739868164062,\n              30.27211440480969\n            ],\n            [\n              -90.29388427734375,\n              30.27211440480969\n            ],\n            [\n              -90.29388427734375,\n              29.191731712018708\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"567","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0341e4b0c8380cd503b8","contributors":{"authors":[{"text":"Michot, T.C. 0000-0002-7044-987X","orcid":"https://orcid.org/0000-0002-7044-987X","contributorId":43426,"corporation":false,"usgs":true,"family":"Michot","given":"T.C.","affiliations":[],"preferred":false,"id":416627,"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":416628,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Adair, S.E.","contributorId":8276,"corporation":false,"usgs":true,"family":"Adair","given":"S.E.","email":"","affiliations":[],"preferred":false,"id":416626,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Moser, E.B.","contributorId":6243,"corporation":false,"usgs":true,"family":"Moser","given":"E.B.","email":"","affiliations":[],"preferred":false,"id":416625,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030593,"text":"70030593 - 2006 - Peak discharge of a Pleistocene lava-dam outburst flood in Grand Canyon, Arizona, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70030593","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3218,"text":"Quaternary Research","active":true,"publicationSubtype":{"id":10}},"title":"Peak discharge of a Pleistocene lava-dam outburst flood in Grand Canyon, Arizona, USA","docAbstract":"The failure of a lava dam 165,000 yr ago produced the largest known flood on the Colorado River in Grand Canyon. The Hyaloclastite Dam was up to 366 m high, and geochemical evidence linked this structure to outburst-flood deposits that occurred for 32 km downstream. Using the Hyaloclastite outburst-flood deposits as paleostage indicators, we used dam-failure and unsteady flow modeling to estimate a peak discharge and flow hydrograph. Failure of the Hyaloclastite Dam released a maximum 11 ?? 109 m3 of water in 31 h. Peak discharges, estimated from uncertainty in channel geometry, dam height, and hydraulic characteristics, ranged from 2.3 to 5.3 ?? 105 m3 s-1 for the Hyaloclastite outburst flood. This discharge is an order of magnitude greater than the largest known discharge on the Colorado River (1.4 ?? 104 m3 s-1) and the largest peak discharge resulting from failure of a constructed dam in the USA (6.5 ?? 104 m3 s-1). Moreover, the Hyaloclastite outburst flood is the oldest documented Quaternary flood and one of the largest to have occurred in the continental USA. The peak discharge for this flood ranks in the top 30 floods (>105 m3 s-1) known worldwide and in the top ten largest floods in North America. ?? 2005 University of Washington. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.yqres.2005.09.006","issn":"00335894","usgsCitation":"Fenton, C., Webb, R.H., and Cerling, T., 2006, Peak discharge of a Pleistocene lava-dam outburst flood in Grand Canyon, Arizona, USA: Quaternary Research, v. 65, no. 2, p. 324-335, https://doi.org/10.1016/j.yqres.2005.09.006.","startPage":"324","endPage":"335","numberOfPages":"12","costCenters":[],"links":[{"id":211844,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.yqres.2005.09.006"},{"id":239214,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"65","issue":"2","noUsgsAuthors":false,"publicationDate":"2017-01-20","publicationStatus":"PW","scienceBaseUri":"505a7607e4b0c8380cd77ea7","contributors":{"authors":[{"text":"Fenton, C.R.","contributorId":53155,"corporation":false,"usgs":true,"family":"Fenton","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":427787,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Webb, R. H.","contributorId":13648,"corporation":false,"usgs":true,"family":"Webb","given":"R.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":427786,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cerling, T.E.","contributorId":85720,"corporation":false,"usgs":true,"family":"Cerling","given":"T.E.","email":"","affiliations":[],"preferred":false,"id":427788,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
]}