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Synopsis: This study evaluates whether previous observations of a higher percentage of parasitism and parasitoid diversity in a complex agricultural landscape, relative to a simple landscape, represent a general phenomenon. Rates of parasitism and parasitoid diversity of the armyworm (Pseudaletia unipuncta) were assessed in three replicate (Onondaga, Ingham, and Benton) regions in southern Michigan. Within each region, a simple landscape (primarily cropland) and a complex landscape (cropland intermixed with mid and late successional noncrop habitats) were identified through analysis of aerial photographs. In each landscape, three maize fields were selected, and second to fourth instar P. unipuncta were released...
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Synopsis: Prior to European settlement, the Northern Mixed-grass Prairie was a mosaic of wetland, grassland and grass-shrub habitats, with riparian and floodplain forests along major drainages. Even today, the physiographic area can be characterized as being one of the largest still relatively intact grassland landscapes that persist in North America. It is the continent’s most important production area for waterfowl and is the heart of the breeding range for some of North America’s rarest species of grassland birds. A comparison of relative abundance estimates among physiographic areas sampled by the North American Breeding Bird Survey indicates that more than 40% of the world’s population of Baird’s Sparrows,...
Whooping cranes (Grus americana) of the Aransas-Wood Buffalo population migrate twice each year through the Great Plains in North America. Recovery activities for this endangered species include providing adequate places to stop and rest during migration, which are generally referred to as stopover sites. To assist in recovery efforts, initial estimates of stopover site use intensity are presented, which provide opportunity to identify areas across the migration range used more intensively by whooping cranes. We used location data acquired from 58 unique individuals fitted with platform transmitting terminals that collected global position system locations. Radio-tagged birds provided 2,158 stopover sites over 10...
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The annual variability in mayflies (Ephemeroptera), fingernail clams (Sphaeriidae), and midges (Chironomidae) in six study areas of the Upper Mississippi River System from 1992 to 1995 was examined. Spatial distribution is also discussed for these organisms along with the Asiatic clam (Corbicula fluminea) and the zebra mussel (Dreissena polymorpha). Sample allocation within each reach was based on a stratified random design where strata were aquatic areas. No significant linear trends across years were found in estimated reachwide mean number of organisms. However, the overall test for differences in intercepts among study areas was statistically significant (P < 0.05) for mayflies, fingernail clams, and midges....
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Satellite images offer an alternative to aerial photography in mapping applications where large area coverage at brief time intervals is required. Their digital format allows either visual or automated interpretation, with immediate incorporation into a geographic information system. Their primary disadvantage is a coarser spatial resolution. This study combined the benefits of (1) the 10-m spatial resolution of SPOT panchromatic (PAN) images, (2) the added spectral information of Landsat Thematic Mapper's (TM) mid-infrared bands, and (3) digital classifications to map terrestrial and aquatic cover types in the Mississippi and Illinois River floodplains. The PAN and the six non-thermal TM bands were combined using...
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Raw data were collected in Shenandoah National Park during summer 2012. Air and temperature data were collected using temperature loggers at several stations throughout the park. These data were used in the publication of the manuscript "Accounting for groundwater influence on headwater stream thermal sensitivity to climate change" through the journal Ecological Applications. Water temperature data were collected at all 78 reach locations during the summer of 2012 (23 June–7 September). Temperature was measured every hour with a logger.
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This part of DS 781 presents data for the faults for the geologic and geomorphic map of the Offshore of Scott Creek map area, California. The vector data file is included in "Faults_OffshoreScottCreek.zip," which is accessible from http://dx.doi.org/10.5066/F7CJ8BJW.The offshore of Scott Creek map area straddles the right-lateral San Gregorio Fault Zone, an important structure in the distributed transform boundary between the North American and Pacific plates (see, for example, Dickinson and others, 2005). Regionally, this fault is part of a system that occurs predominantly in the offshore for about 400 km from Point Conception in the south (where it is known as the Hosgri fault; Johnson and Watt, 2012) to Bolinas...
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NOTE: This download link includes Fish Regions, Freshwater Ecoregions, and Freshwater Resilience. Freshwater ecoregions provide a global biogeographic regionalization of the Earth's freshwater biodiversity. These units are distinguished by patterns of native fish distribution resulting from large-scale geoclimatic processes and evolutionary history. The freshwater ecoregion boundaries generally, though not always, correspond with those of watersheds. Within individual ecoregions there will be turnover of species, such as when moving up or down a river system, but taken as a whole an ecoregion will typically have a distinct evolutionary history and/or suite of ecological processes (Abell et al. 2008). The WWF defined...
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This part of DS 781 presents data for the sediment-thickness map of the Pigeon Point to Monterey, California, region. The raster data file is included in "SedimentThickness_PigeonPointToSouthMontereyBay.zip," which is accessible from http://dx.doi.org/10.5066/F7F47M6T As part of the USGS's California State Waters Mapping Project, a 50-m grid of sediment thickness for the seafloor within the 3-nautical mile limit between Pigeon Point and Monterey was generated from seismic-reflection data collected in 2009 and 2012 (USGS activities S-15-10-NC, S-06-11-MB and S-N1-09-MB) supplemented with outcrop and geologic structure from DS 781. The resulting grid covers an area of approximately 860 sq km. The volume of sediment...
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The data set includes delineation of sampling strata for the six study reaches of the UMRR Program’s LTRM element. Separate strata coverages exist for each of the three monitoring components (fish, vegetation, and water quality) to meet the differing sampling needs among components. Generally, the sampling strata consist of main channel, side channel, backwater, and impounded areas. The fish component further delineates a “shoreline” portion of the strata to be used for sampling gears deployed only along the shoreline. The data are raster in origin, with the center of each pixel representing the sampling location. Cell size is typically 50 meters, although several water quality strata are at 200 meter cell size.
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The frequency and severity of flooding in the Upper Mississippi River Basin is influenced by three major factors: the amount and timing of precipitation, the condition of the basin's stream channels and floodplains, and the timing and rate of storm water conveyance off the watershed, which is a function of soil condition, extent of impervious surface, vegetation density, and other factors. To the extent that changing precipitation patterns result from human-caused changes in the global climate, this factor can be addressed through international efforts to reduce emissions of greenhouse gases. Careful planning and design can provide some control over the condition of channels, floodplains, and watersheds. The primary...
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Resilient stream systems are those that will support a full spectrum of biodiversity and maintain their functional integrity even as species compositions and hydrologic properties change in response to shifts in ambient conditions due to climate change. We examined all connected stream networks in the Northeast and Mid-Atlantic for seven characteristics correlated with resilience. These included four physical properties (network length, number of size classes, number of gradients classes and number of temperature classes), and three condition characteristics (risk of hydrologic alterations, natural cover in the floodplain, and amount of impervious surface in the watershed). A network was defined as a continuous...
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This layer depicts the status, or degree of disturbance, to plant communities on the main Hawaiian Islands. To more precisely identify areas where native species may presently be found, a map was generated that considers the following three categories of habitat quality: High, areas dominated by native vegetation; Medium, areas dominated by nonnative vegetation; and Low, highly modified landscapes. The primary source for mapping these three categories is the HIGAP land-cover classification (Gon, 2006). The High category includes all HIGAP land-cover classes that are considered to be either native dominated or mixed native and nonnative in order to represent those areas that have substantial native-species composition....
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NOTE: Two data download links are provided. The first includes the data described below as a geographic point layer and as a .csv file. The second link is a data package containing: the annual probability of observing one individual, the annual probability of encountering a large flock, and the monthly probability of observing one individual, for the full set of 24 species (in .csv format), and the associated report “Mapping the distribution, abundance and risk assessment of marine birds in the Northwest Atlantic.” To improve display of this data on Data Basin the point data was converted to a raster grid. This map depicts the mean predicted probability of observing at least one individual Black Scoter (Melanitta...
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NOTE: Two data download links are provided. The first includes the data described below as a geographic point layer and as a .csv file. The second link is a data package containing: the annual probability of observing one individual, the annual probability of encountering a large flock, and the monthly probability of observing one individual, for the full set of 24 species (in .csv format), and the associated report “Mapping the distribution, abundance and risk assessment of marine birds in the Northwest Atlantic.” To improve display of this data on Data Basin the point data was converted to a raster grid. This map depicts the mean predicted probability of observing at least one individual Common Eider (Somateria...
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NOTE: Two data download links are provided. The first includes the data described below as a geographic point layer and as a .csv file. The second link is a data package containing: the annual probability of observing one individual, the annual probability of encountering a large flock, and the monthly probability of observing one individual, for the full set of 24 species (in .csv format), and the associated report “Mapping the distribution, abundance and risk assessment of marine birds in the Northwest Atlantic.” To improve display of this data on Data Basin the point data was converted to a raster grid. This map depicts the mean predicted probability of observing at least one individual Wilson's Storm-petrel...
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This dataset is a component of a complete package of products from the Connect the Connecticut project. Connect the Connecticut is a collaborative effort to identify shared priorities for conserving the Connecticut River Watershed for future generations, considering the value of fish and wildlife species and the natural ecosystems they inhabit. Click here to download the full data package, including all documentation.This dataset depicts the potential capability of the landscape throughout the CT River Watershed to provide habitat for Eastern Meadowlark (Sturnella magna) based on environmental conditions existing in approximately 2010. Landscape capability integrates factors influencing climate suitability, habitat...
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This dataset is a component of a complete package of products from the Connect the Connecticut project. Connect the Connecticut is a collaborative effort to identify shared priorities for conserving the Connecticut River Watershed for future generations, considering the value of fish and wildlife species and the natural ecosystems they inhabit. Click here to download the full data package, including all documentation.This dataset depicts the potential capability of the landscape throughout the Connecticut River Watershed to provide habitat for Ruffed Grouse (Bonasa umbellus) based on environmental conditions existing in approximately 2010. Landscape capability integrates factors influencing climate suitability,...
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The geographic information system pilot project on Pool 13 of the Upper Mississippi River System was initiated to evaluate system-wide application of various methods of capturing, processing and converting resource data. Classification schemes were developed for two data themes: land cover/land use (vegetation) and aquatic areas. Evaluation of 1:15,000 scale aerial photography indicated that (1) color infrared transparencies were essential for accurately mapping major vegetation classes and vegetation units less than 1 acre; (2) color infrared prints were essential for field work (delineating work areas on the photos and identifying in the field; (3) true color (Ektachrome) transparencies and prints were not useful...


map background search result map search result map Does agricultural landscape structure affect parasistism and parasitoid diversity? Partners in Flight Bird Conservation Plan for Northern Mixed-Grass Prairie Geographic information system pilot project for the Upper Mississippi River System Geospatial application:  Assessment of merged Landsat TM and SPOT panchromatic data for Pool 26, Upper Mississippi River System A natural storage approach for flood damage reduction and environmental enhancement Temporal analyses of select macroinvertebrates in the Upper Mississippi River System, 1992-1995 Unusual coloration in a red-eared slider, Trachemys scripta elegans Faults--Offshore Scott Creek, California Freshwater Resilience, All Streams, Stratified by Fish Region and Freshwater Ecoregion, Northeast U.S. Hawaii Habitat Quality (HI_HabQual) Predicted Annual Probability of Observing at least One Black Scoter Predicted Annual Probability of Observing at least One Common Eider Predicted Annual Probability of Observing at least One Wilson's Storm-petrel Freshwater Ecoregions, Northeast Landscape Capability for Ruffed Grouse, CT River Watershed Landscape Capability for Eastern Meadowlark, CT River Watershed 2012 Air and Temperature Data from Shenandoah National Park LTRM Water Quality Sampling Strata Sediment Thickness--Pigeon Point to Monterey, California Faults--Offshore Scott Creek, California Geospatial application:  Assessment of merged Landsat TM and SPOT panchromatic data for Pool 26, Upper Mississippi River System 2012 Air and Temperature Data from Shenandoah National Park Sediment Thickness--Pigeon Point to Monterey, California Does agricultural landscape structure affect parasistism and parasitoid diversity? Landscape Capability for Ruffed Grouse, CT River Watershed Landscape Capability for Eastern Meadowlark, CT River Watershed Hawaii Habitat Quality (HI_HabQual) LTRM Water Quality Sampling Strata Partners in Flight Bird Conservation Plan for Northern Mixed-Grass Prairie Predicted Annual Probability of Observing at least One Common Eider Predicted Annual Probability of Observing at least One Wilson's Storm-petrel Predicted Annual Probability of Observing at least One Black Scoter Geographic information system pilot project for the Upper Mississippi River System A natural storage approach for flood damage reduction and environmental enhancement Temporal analyses of select macroinvertebrates in the Upper Mississippi River System, 1992-1995 Unusual coloration in a red-eared slider, Trachemys scripta elegans Freshwater Resilience, All Streams, Stratified by Fish Region and Freshwater Ecoregion, Northeast U.S. Freshwater Ecoregions, Northeast