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17 Titles Match Your Query
Showing 1 through 17 of 17
1. Effects of Alkalinity and Hardness on Toxicity of NaCl to Ceriodaphnia Dubia [usgsbrdpwrc0011]
The use of reactive dyes in textile manufacturing for coloring cotton products can contribute elevated concentrations of salinity and alkalinity in effluents from municipal waste-treatment facilities, ...


2. Toxicity of Fresh Versus Equilibrated Pore Water [usgsbrdpwrc0012]
Pore water is considered a primary route of contaminant exposure to benthic organisms. Used with solid-phase sediment evaluations, toxicity of pore water provides additional insight into the bioavailability ...


3. Audubon Christmas Bird Counts [brdpwrc0006]
Audubon link: "http://www.audubon.org/" The first Christmas Bird Counts (CBCs) were conducted in 1900 in response to a suggestion made in the National Audubon Society's magazine Bird-Lore. Twenty-seven ...


4. Breeding Bird Survey Grid for Lower 48 States, Alaska and Southern portion of Canada [USGS_PWRC_BreedingBirdSurveyGrid]
This is a polygon coverage of the mathematically generated grid for North America, excluding Mexico and the Northern portion of Canada. The grid is used in the statistical analysis of the Breeding ...


5. Duckdata-A Bibliographic Database of North American Waterfowl (Anatidae) and their Wetland Habitats [PWRC_Duckdata]
DUCKDATA provides a comprehensive bibliography of published literature on the ecology, conservation, and management of North American waterfowl and their wetland habitats. The primary objective of ...


6. Patuxent Bird Identification InfoCenter [PWRC_BirdIDCenter]
Here we present photographs, songs, videos, identification tips, maps, and life history information for North American birds.


7. The North American Breeding Bird Survey, Results and Analysis 1966 - 2011. Version 12-13-2012. [USGS_PWRC_BreedingBirdSurvey_V10.15.2010]
This website consists of a series of interactive programs and maps that describe population change for North American Birds summarized from North American Breeding Bird Survey (BBS) data. Metadata ...


8. Determination, Biological Consequences, and Modeling of Sex-Specific Demographic Rates in Declining, Threatened, or Endangered Metapopulations [brdpwrc0053]
Proper management of animal populations requires an understanding of both population dynamics and ecology, and more research that integrates population dynamics and ecological studies is needed to ...


9. Host Selection in the Forest Interior: Cowbirds Target Ground-Nesting Species [brdpwrc0018]
We investigated patterns of cowbird host selection in a large (1300 ha), unfragmented forest in eastern New York in 1992-3 to determine whether cowbird parasitism rates can be attributed tospecies-specific ...


10. Modeling and Management of Sandhill Crane Populations [brdpwrc0052]
There are six subspecies of sandhill cranes (Grus canadensis) endemic to North America. The greater sandhill crane (G. c. tabida) can be divided into several breeding populations. Two of these populations, ...


11. Atlantic Offshore Seabird Dataset Catalog [USGS_PWRC_Atlantic_Seabird_Dataset]
ABSTRACT: Several bureaus within the Department of Interior compiled available information from seabird observation datasets from the Atlantic Outer Continental Shelf into a single database, with ...


12. Breeding Bird Census [brdpwrc0007]
Recognizing the importance of long-term studies for improving our understanding of changes in distribution and abundance patterns of avian communities, the former U.S. Bureau of Biological Survey ...


13. Impact of Cowbird Parasitism on Major Host Species in Ontario [usgsbrdpwrc0015]
We compared the relative effect of cowbird parasitism on a large number (n = 12) of different host species at a very large spatial scale (the province of Ontario), using a large sample size of nests ...


14. Using Incubation Period Length as a Tool to Predict Host Impact [usgsbrdpwrc0014]
Three endangered species for which cowbird parasitism has been identified as a major factor in population decline have incubation periods > 14 days: Black-capped Vireo, Least Bell's Vireo, and Kirtland's ...


15. Declining, Threatened and Endangered Species Database [PWRC_ThreatenedSpecies]
The Fish and Wildlife Service has listed members of more than 1,200 taxa as Threatened or Endangered, and has identified about 4,000 additional organisms which may require listing or further study. ...


16. Patuxent Plant List and Herbarium Collection [PWRC_Herbarium]
The herbarium presently contains over a thousand collections of pressed, dried plant specimens that were gathered on the refuge during early plant surveys undertaken after the creation of the refuge. ...


17. Links Between Lice Species, Cowbird Fledglings, and Avian Host Species [usgsbrdpwrc0016]
Cowbirds lay their eggs in songbird nests, replacing some songbird eggs with their own; the unwitting songbirds end up raising cowbirds. Biologist Caldwell Hahn at the Patuxent Wildlife Research Center ...


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