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Page 1652, results 41276 - 41300

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Hyperspectral remote sensing of vegetation and agricultural crops: Knowledge gain and knowledge gap after 40 years of research
Prasad S. Thenkabail, John G. Lyon, Alfredo Huete
Prasad S. Thenkabail, John G. Lyon, Alfredo Huete, editor(s)
2011, Book chapter, Hyperspectral remote sensing of vegetation
The focus of this chapter was to summarize the advances made over last 40+ years, as reported in various chapters of this book, in understanding, modeling, and mapping terrestrial vegetation using hyperspectral remote sensing (or imaging spectroscopy) using sensors that are ground-based, truck-mounted, airborne, and spaceborne. As we have seen...
Advances in hyperspectral remote sensing of vegetation and agricultural croplands
Prasad S. Thenkabail, John G. Lyon, Alfredo Huete
Prasad S. Thenkabail, John G. Lyon, Alfredo Huete, editor(s)
2011, Book, Hyperspectral remote sensing of vegetation
Recent advances in hyperspectral remote sensing (or imaging spectroscopy) demonstrate a great utility for a variety of land monitoring applications. It is now possible to be diagnostic in sensing species and plant communities using remotely sensed data and to do so in a direct and informed manner using modern tools...
Hydrostratigraphic interpretation of test-hole and geophysical data, Upper Loup River Basin, Nebraska, 2008-10
Christopher M. Hobza, Theodore H. Asch, Paul A. Bedrosian
2011, Open-File Report 2011-1289
Nebraska's Upper Loup Natural Resources District is currently (2011) participating in the Elkhorn-Loup Model to understand the effect of various groundwater-management scenarios on surface-water resources. During Phase 1 of the Elkhorn-Loup Model, a lack of subsurface geological information in the Upper Loup Natural Resources District, hereafter referred to as the...
Response of lake chemistry to atmospheric deposition and climate in selected Class I wilderness areas in the western United States, 1993-2009
M. Alisa Mast
2011, Fact Sheet 2011-3084
The U.S. Geological Survey, in cooperation with the U.S. Department of Agriculture Forest Service, Air Resource Management, conducted a study to evaluate long-term trends in lake-water chemistry for 64 high-elevation lakes in selected Class I wilderness areas in Colorado, Idaho, Utah, and Wyoming during 1993 to 2009. Understanding how and...
Trends in lake chemistry in response to atmospheric deposition and climate in selected Class I wilderness areas in Colorado, Idaho, Utah, and Wyoming, 1993-2009
M. Alisa Mast, George P. Ingersoll
2011, Scientific Investigations Report 2011-5123
In 2010, the U.S. Geological Survey, in cooperation with the U.S. Department of Agriculture Forest Service, Air Resource Management, began a study to evaluate long-term trends in lake-water chemistry for 64 high-elevation lakes in selected Class I wilderness areas in Colorado, Idaho, Utah, and Wyoming during 1993 to 2009. The...
Trends in sea otter population abundance in western Prince William Sound, Alaska: Progress toward recovery following the 1989 Exxon Valdez oil spill
James L. Bodkin, Brenda E. Ballachey, George G. Esslinger
2011, Scientific Investigations Report 2011-5213
Sea otters in western Prince William Sound (WPWS) and elsewhere in the Gulf of Alaska suffered widespread mortality as a result of oiling following the 1989 T/V Exxon Valdez oil spill. Following the spill, extensive efforts have been directed toward identifying and understanding long-term consequences of the spill and the...
Pathogenic bacteria and microbial-source tracking markers in Brandywine Creek Basin, Pennsylvania and Delaware, 2009-10
Joseph W. Duris, Andrew G. Reif, Leif E. Olson, Heather E. Johnson
2011, Scientific Investigations Report 2011-5164
The City of Wilmington, Delaware, is in the downstream part of the Brandywine Creek Basin, on the main stem of Brandywine Creek. Wilmington uses this stream, which drains a mixed-land-use area upstream, for its main drinking-water supply. Because the stream is used for drinking water, Wilmington is in need of...
Analysis of trends in climate, streamflow, and stream temperature in north coastal California
Mary Ann Madej
C. Nicholas Medley, Glenn Patterson, Melanie J. Parker, editor(s)
2011, Conference Paper, Observing, studying, and managing for change - Proceedings of the Fourth Interagency Conference on Research in the Watersheds: U.S. Geological Survey Scientific Investigations Report 2011–5169
As part of a broader project analyzing trends in climate, streamflow, vegetation, salmon, and ocean conditions in northern California national park units, we compiled average monthly air temperature and precipitation data from 73 climate stations, streamflow data from 21 river gaging stations, and limited stream temperature data from salmon-bearing rivers...
Potential climate change effects on water tables and pyrite oxidation in headwater catchments in Colorado
Richard M. Webb, M. Alisa Mast, Andrew H. Manning, David W. Clow, Donald H. Campbell
C. Nicholas Medley, Glenn Patterson, Melanie J. Parker, editor(s)
2011, Conference Paper, Observing, studying, and managing for change - Proceedings of the Fourth Interagency Conference on Research in the Watersheds: U.S. Geological Survey Scientific Investigations Report 2011–5169
A water, energy, and biogeochemical model (WEBMOD) was constructed to simulate hydrology and pyrite oxidation for the period October 1992 through September 1997. The hydrologic model simulates processes in Loch Vale, a 6.6-km² granitic watershed that drains the east side of the Continental Divide. Parameters describing pyrite oxidation were derived...
Forest bird monitoring protocol for strategic habitat conservation and endangered species management on O'ahu Forest National Wildlife Refuge, Island of O'ahu, Hawai'i
Richard J. Camp, P. Marcos Gorresen, Paul C. Banko
2011, Report
This report describes the results of a pilot forest bird survey and a consequent forest bird monitoring protocol that was developed for the O'ahu Forest National Wildlife Refuge, O'ahu Island, Hawai'i. The pilot survey was conducted to inform aspects of the monitoring protocol and to provide a baseline with which...
Nest predation and circulating corticosterone levels within and among species
Joseph J. Fontaine, Elena Arriero, Hubert Schwabl, Thomas E. Martin
2011, The Condor (113) 825-833
Variation in the risk of predation to offspring can influence the expression of reproductive strategies both within and among species. Appropriate expression of reproductive strategies in environments that differ in predation risk can have clear advantages for fitness. Although adult-predation risk appears to influence glucocorticosteroid levels, leading to changes in...
Severe bill deformity of an American Kestrel wintering in California
William M. Iko, Robert J. Dusek
2011, Western Birds (42) 251-254
During a recent survey for West Nile virus in wild birds around the Sonny Bono Salton Sea National Wildlife Refuge, Imperial County, California (Dusek et al. 2010), we captured a female American Kestrel (Falco sparverius) with a severe bill deformity (Figure 1). The kestrel was captured on 9 March 2006,...
Editor’s message: Groundwater modeling fantasies - Part 2, down to earth
Clifford I. Voss
2011, Hydrogeology Journal (19) 1455-1458
Simplicity is the final achievement. After one has played a vast quantity of notes and more notes, it is simplicity that emerges as the crowning reward of art. (Frédéric Chopin, a musician and composer, quoted in If Not God, Then What? by Fost 2007)Despite the dubious developments...
Editor’s message: Groundwater modeling fantasies - Part 1, adrift in the details
Clifford I. Voss
2011, Hydrogeology Journal (19) 1281-1284
Fools ignore complexity. Pragmatists suffer it. Some can avoid it. Geniuses remove it. …Simplicity does not precede complexity, but follows it. (Epigrams in Programming by Alan Perlis, a computer scientist; Perlis 1982).A doctoral student creating a groundwater model of a regional aquifer put individual...
Evaluating the potential for remote bathymetric mapping of a turbid, sand-bed river: 2. application to hyperspectral image data from the Platte River
Carl J. Legleiter, Paul J. Kinzel, Brandon T. Overstreet
2011, Water Resources Research (47)
This study examined the possibility of mapping depth from optical image data in turbid, sediment-laden channels. Analysis of hyperspectral images from the Platte River indicated that depth retrieval in these environments is feasible, but might not be highly accurate. Four methods of calibrating image-derived depth estimates were evaluated. The first...
Evaluating the potential for remote bathymetric mapping of a turbid, sand-bed river: 1. Field spectroscopy and radiative transfer modeling
Carl J. Legleiter, Paul J. Kinzel, Brandon T. Overstreet
2011, Water Resources Research (47)
Remote sensing offers an efficient means of mapping bathymetry in river systems, but this approach has been applied primarily to clear-flowing, gravel bed streams. This study used field spectroscopy and radiative transfer modeling to assess the feasibility of spectrally based depth retrieval in a sand-bed river with a higher suspended...
An evaluation of the Bayesian approach to fitting the N-mixture model for use with pseudo-replicated count data
S.G. Toribo, B. R. Gray, S. Liang
2011, Journal of Statistical Computation and Simulation (82) 1135-1143
The N-mixture model proposed by Royle in 2004 may be used to approximate the abundance and detection probability of animal species in a given region. In 2006, Royle and Dorazio discussed the advantages of using a Bayesian approach in modelling animal abundance and occurrence using a hierarchical N-mixture model. N-mixture...
An automated device for provoking and capturing wildlife calls
David E. Ausband, Jesse Skrivseth, Michael S. Mitchell
2011, Wildlife Society Bulletin (35) 498-503
Some animals exhibit call-and-response behaviors that can be exploited to facilitate detection. Traditionally, acoustic surveys that use call-and-respond techniques have required an observer's presence to perform the broadcast, record the response, or both events. This can be labor-intensive and may influence animal behavior and, thus, survey results. We developed an...
The human dimension of fire regimes on Earth
David M. J. S. Bowman, Jennifer Balch, Paulo Artaxo, William J. Bond, Mark A. Cochrane, Carla M. D'Antonio, Fay H. Johnston, Ruth DeFries, Jon E. Keeley, Meg A. Krawchuk, Christian A. Kull, Michelle Mack, Max A. Moritz, Stephen Pyne, Christopher I. Roos, Andrew C. Scott, Navjot S. Sodhi, Thomas W. Swetnam
2011, Journal of Biogeography (38) 2223-2236
Humans and their ancestors are unique in being a fire‐making species, but ‘natural’ (i.e. independent of humans) fires have an ancient, geological history on Earth. Natural fires have influenced biological evolution and global biogeochemical cycles, making fire integral to the functioning of some biomes. Globally, debate rages about the impact...
Alternative states of a semiarid grassland ecosystem: implications for ecosystem services
Mark E. Miller, R. Travis Belote, Matthew A. Bowker, Steven L. Garman
2011, Ecosphere (2)
Ecosystems can shift between alternative states characterized by persistent differences in structure, function, and capacity to provide ecosystem services valued by society. We examined empirical evidence for alternative states in a semiarid grassland ecosystem where topographic complexity and contrasting management regimes have led to spatial variations in levels of livestock...
Differences in macroinvertebrate community structure in streams and rivers with different hydrologic regimes in the semi-arid Colorado Plateau
Matthew P. Miller, Anne M.D. Brasher
2011, River Systems (19) 225-238
Aquatic macroinvertebrates are sensitive to changes in their chemical and physical environment, and as such, serve as excellent indicators of overall ecosystem health. Moreover, temporal and spatial differences in macroinvertebrate community structure can be used to investigate broad issues in aquatic science, such as the hypothesis that changes in climate...
Assessment of undiscovered conventional oil and gas resources of Thailand
Chris Schenk
2011, PTIT Focus (25) 38-42
The U.S. Geological Survey estimated mean volumes of 1.6 billion barrels of undiscovered conventional oil and 17 trillion cubic feet of undiscovered conventional natural gas in three geologic provinces of Thailand using a geology-based methodology. Most of the undiscovered conventional oil and gas resource is estimated to be in the...
Offshore sand-shoal development and evolution of Petit Bois Pass, Mississippi-Alabama Barrier Islands, Mississippi, USA
James G. Flocks, Kyle W. Kelso, Gregory C. Twichell, Noreen A. Buster, John N. Baehr
Julie D. Rosati, Ping Wang, Tiffany M. Roberts, editor(s)
2011, Book, The Proceedings of the Coastal Sediments 2011
Assessment of recently collected geophysical and sediment-core data identifies an extensive shoal field located off Dauphin and Petit Bois Islands. The shoals are the product of Pleistocene fluvial deposition and Holocene marine-transgressive processes, and their position and orientation oblique to the modern shoreline has been stable over the past century....
A new strategy for developing Vs30 maps
David J. Wald, Leslie McWhirter, Eric Thompson, Amanda S. Hering
2011, Book
Despite obvious limitations as a proxy for site amplification, the use of time-averaged shear-wave velocity over the top 30m (Vs30) is useful and widely practiced, most notably through its use as an explanatory variable in ground motion prediction equations (and thus hazard maps and ShakeMaps, among other applications). Local, regional,...