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165656 results.

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Page 1871, results 46751 - 46775

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Not all publications have extents, not all extents are completely accurate
Changes in agriculture and abundance of snow geese affect carrying capacity of sandhill cranes in Nebraska
A.T. Pearse, Gary L. Krapu, D.A. Brandt, P.J. Kinzel
2010, Journal of Wildlife Management (74) 479-488
The central Platte River valley (CPRV) in Nebraska, USA, is a key spring-staging area for approximately 80 of the midcontinent population of sandhill cranes (Grus canadensis; hereafter cranes). Evidence that staging cranes acquired less lipid reserves during the 1990s compared to the late 1970s and increases in use of the...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: 30-Year Average Annual Precipitation, 1971-2000
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-21
This tabular data set represents the 30-year (1971-2000) average annual precipitation in millimeters multiplied by 100 compiled for every MRB_E2RF1 catchment of selected Major River Basins (MRBs, Crawford and others, 2006). The source data were the United States Average Monthly or Annual Minimum Precipitation, 1971 - 2000 raster data set...
Stress and fish reproduction: The roles of allostasis and hormesis
C.B. Schreck
2010, General and Comparative Endocrinology (165) 549-556
This paper is a review of the effects of stress on reproduction in fishes. I hope to further the development of the concepts of allostasis and hormesis as relevant to understanding reproduction in general and in fish in particular. The main contentions I derive in this review are the following:...
Intrinsic controls on the range of volumes, morphologies, and dimensions of submarine lobes
A. Prelat, J.A. Covault, D.M. Hodgson, A. Fildani, S.S. Flint
2010, Sedimentary Geology (232) 66-76
Submarine lobe dimensions from six different systems are compared: 1) the exhumed Permian Fan 3 lobe complex of the Tanqua Karoo, South Africa; 2) the modern Amazon fan channel-mouth lobe complex, offshore Brazil; 3) a portion of the modern distal Za??re fan, offshore Angola/Congo; 4) a Pleistocene fan of the...
Attributes for MRB_E2RF1 Catchments by Major Rivers Basins in the Conterminous United States: Total Precipitation, 2002
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-20
This tabular data set represents the catchment-average total precipitation in millimeters multiplied by 100 for 2002, compiled for every MRB_E2RF1 catchment of selected Major River Basins (MRBs, Crawford and others, 2006). The source data were the Near-Real-Time Monthly High-Resolution Precipitation Climate Data Set for the Conterminous United States (2002) raster...
Laboratory evaluation of a walleye (Sander vitreus) bioenergetics model
C.P. Madenjian, C. Wang, T. P. O’Brien, M.J. Holuszko, L.M. Ogilvie, R.G. Stickel
2010, Fish Physiology and Biochemistry (36) 45-53
Walleye (Sander vitreus) is an important game fish throughout much of North America. We evaluated the performance of the Wisconsin bioenergetics model for walleye in the laboratory. Walleyes were fed rainbow smelt (Osmerus mordax) in four laboratory tanks during a 126-day experiment. Based on a statistical comparison of bioenergetics model...
Control of one invasive plant species allows exotic grasses to become dominant in northern Great Plains grasslands
D.L. Larson, J.L. Larson
2010, Biological Conservation (143) 1901-1910
Decline of leafy spurge (Euphorbia esula) in the northern Great Plains of the US is generally viewed as a success story for biological control, but quality of the vegetation that survived the infestation is key to recovery of ecosystem function. In addition, effects of other invasive species, notably cool-season exotic...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Mean Annual R-factor, 1971-2000
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-23
This tabular data set represents the average annual R-factor, rainfall-runoff erosivity measure, compiled for every MRB_E2RF1 catchment of selected Major River Basins (MRBs, Crawford and others, 2006). The source data are from Christopher Daly of the Spatial Climate Analysis Service, Oregon State University, and George Taylor of the Oregon Climate...
Predicting potentially toxigenic Pseudo-nitzschia blooms in the Chesapeake Bay
C.R. Anderson, M.R.P. Sapiano, M.B.K. Prasad, W. Long, P.J. Tango, C.W. Brown, R. Murtugudde
2010, Journal of Marine Systems (83) 127-140
Harmful algal blooms are now recognized as a significant threat to the Chesapeake Bay as they can severely compromise the economic viability of important recreational and commercial fisheries in the largest estuary of the United States. This study describes the development of empirical models for the potentially domoic acid-producing Pseudo-nitzschia...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Physiographic Provinces
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-18
This tabular data set represents the area of each physiographic province (Fenneman and Johnson, 1946) in square meters, compiled for every MRB_E2RF1 catchment of selected Major River Basins (MRBs, Crawford and others, 2006). The source data are from Fenneman and Johnson's Physiographic Provinces of the United States, which is based...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Nutrient Inputs from Fertilizer and Manure, Nitrogen and Phosphorus (N&P), 2002
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-17
This tabular data set represents the total amount of nitrogen and phosphorus, in kilograms for the year 2002, compiled for every MRB_E2RF1 catchment of the Major River Basins (MRBs, Crawford and others, 2006). The source data set is County-Level Estimates of Nutrient Inputs to the Land Surface of the Conterminous...
Contribution of glacier runoff to freshwater discharge into the Gulf of Alaska
Edward G. Neal, Eran Hood, K. Smikrud
2010, Geophysical Research Letters (37)
 Watersheds along the Gulf of Alaska (GOA) are undergoing climate warming, glacier volume loss, and shifts in the timing and volume of freshwater delivered to the eastern North Pacific Ocean. We estimate recent mean annual freshwater discharge to the GOA at 870 km3 yr−1. Small distributed coastal drainages contribute 78%...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Normalized Atmospheric Deposition for 2002, Nitrate (NO3)
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-16
This tabular data set represents the average normalized (wet) deposition, in kilograms per square kilometer multiplied by 100, of Nitrate (NO3) for the year 2002 compiled for every MRB_E2RF1 catchment of the Major River Basins (MRBs, Crawford and others, 2006). Estimates of NO3 deposition are based on National Atmospheric Deposition...
Identifying sources of stream water sulfate after a summer drought in the Sleepers River watershed (Vermont, USA) using hydrological, chemical, and isotopic techniques
B. Mayer, J. B. Shanley, S.W. Bailey, M.J. Mitchell
2010, Applied Geochemistry (25) 747-754
In many forested headwater catchments, peak SO42 - concentrations in stream water occur in the late summer or fall following drought potentially resulting in episodic stream acidification. The sources of highly elevated stream water SO42 - concentrations were investigated in a first order stream at the Sleepers River watershed (Vermont,...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Estimated Mean Annual Natural Groundwater Recharge, 2002
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-22
This tabular data set represents the mean annual natural groundwater recharge, in millimeters, compiled for every MRB_E2RF1catchment of selected Major River Basins (MRBs, Crawford and others, 2006). The source data set is Estimated Mean Annual Natural Ground-Water Recharge in the Conterminous United States (Wolock, 2003). The MRB_E2RF1 catchments are based...
Inter-comparison of hydro-climatic regimes across northern catchments: Synchronicity, resistance and resilience
S.K. Carey, D. Tetzlaff, J. Seibert, C. Soulsby, J. Buttle, H. Laudon, J. McDonnell, K. McGuire, D. Caissie, J. Shanley, M. Kennedy, K. Devito, J.W. Pomeroy
2010, Hydrological Processes (24) 3591-3602
The higher mid-latitudes of the Northern Hemisphere are particularly sensitive to climate change as small differences in temperature determine frozen ground status, precipitation phase, and the magnitude and timing of snow accumulation and melt. An international inter-catchment comparison program, North-Watch, seeks to improve our understanding of the sensitivity of northern...
Avian foods, foraging and habitat conservation in world rice fields
J.D. Stafford, R.M. Kaminski, K. J. Reinecke
2010, Waterbirds (33) 133-150
Worldwide, rice (Oryza sativa) agriculture typically involves seasonal flooding and soil tillage, which provides a variety of microhabitats and potential food for birds. Water management in rice fields creates conditions ranging from saturated mud flats to shallow (<30 cm) water, thereby attracting different guilds of birds. Grain not collected during...
A protozoal-associated epizootic impacting marine wildlife: Mass-mortality of southern sea otters (Enhydra lutris nereis) due to Sarcocystis neurona infection
M.A. Miller, P.A. Conrad, M. Harris, B. Hatfield, G. Langlois, David A. Jessup, S.L. Magargal, A.E. Packham, S. Toy-Choutka, A.C. Melli, M.A. Murray, F.M. Gulland, M.E. Grigg
2010, Veterinary Parasitology (172) 183-194
During April 2004, 40 sick and dead southern sea otters (Enhydra lutris nereis) were recovered over 18 km of coastline near Morro Bay, California. This event represented the single largest monthly spike in mortality ever recorded during 30 years of southern sea otter stranding data collection. Because of the point-source...
Summary of the Second International Planetary Dunes Workshop: Planetary Analogs - Integrating Models, Remote Sensing, and Field Data, Alamosa, Colorado, USA, May 18-21, 2010
L.K. Fenton, M.A. Bishop, M.C. Bourke, C.S. Bristow, R.K. Hayward, B.H. Horgan, N. Lancaster, T.I. Michaels, D. Tirsch, T.N. Titus, A. Valdez
2010, Conference Paper, Aeolian Research
The Second International Planetary Dunes Workshop took place in Alamosa, Colorado, USA from May 18-21, 2010. The workshop brought together researchers from diverse backgrounds to foster discussion and collaboration regarding terrestrial and extra-terrestrial dunes and dune systems. Two and a half days were spent on five oral sessions and one...
Anthropogenic tracers, endocrine disrupting chemicals, and endocrine disruption in Minnesota lakes
J.H. Writer, L. B. Barber, G.K. Brown, Howard E. Taylor, R.L. Kiesling, M.L. Ferrey, N.D. Jahns, S.E. Bartell, H.L. Schoenfuss
2010, Science of the Total Environment (409) 100-111
Concentrations of endocrine disrupting chemicals and endocrine disruption in fish were determined in 11 lakes across Minnesota that represent a range of trophic conditions and land uses (urban, agricultural, residential, and forested) and in which wastewater treatment plant discharges were absent. Water, sediment, and passive polar organic integrative samplers (POCIS)...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Level 3 Nutrient Ecoregions, 2002
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-13
This tabular data set represents the area of each level 3 nutrient ecoregion in square meters compiled for every MRB_E2RF1 catchment of the Major River Basins (MRBs, Crawford and others, 2006). The source data are from the 2002 version of the U.S. Environmental Protection Agency's (USEPA) Aggregations of Level III...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: NLCD 2001 Imperviousness
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-12
This tabular data set represents the mean percent impervious surface from the Imperviousness Layer of the National Land Cover Dataset 2001, (LaMotte and Wieczorek, 2010), compiled for every MRB_E2RF1 catchment of selected Major River Basins (MRBs, Crawford and others, 2006). The source data set represents imperviousness for the conterminous...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Hydrologic Landscape Regions
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-10
This tabular data set represents the area of Hydrologic Landscape Regions (HLR) compiled for every MRB_E2RF1 catchment of the Major River Basins (MRBs, Crawford and others, 2006). The source data set is a 100-meter version of Hydrologic Landscape Regions of the United States (Wolock, 2003). HLR groups watersheds on the...