USGS: Science Topics: population and community ecology

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Population and community ecology

Interactions of a single species (population) or an association of different species (community) occupying a particular region, including their biotic and abiotic environments.

Subtopics:
Animal behavior (27 items)
Biodiversity (26 items)
Biogeography (73 items)
Community ecology (13 items)
Ecosystems (264 items)
Habitats (30 items)
Population dynamics (35 items)
Phenology (11 items)
Symbiosis (1 items)

Radar ecology (2 items)

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Breeding Bird Explorer [More info]: Data management system for Breeding Bird Atlas projects in Maryland and the District of Columbia and in Vermont.
Bryophytes and lichens, small but indispensable forest dwellers [More info]: Description of bryophytes (mosses, liverworts, and hornworts) and lichens (dual organisms of a fungus and an alga or a cyanobacterium) that are part of forest ecosystems in the Pacific Northwest with information on habitat and conservation.
Buck Island Reef National Monument Sea Turtle Research Program: Sea turtle nesting research & monitoring protocols manual [More info]: Manual for research program on the nesting habits of sea turtles of the Virgin Islands, with descriptions of species, nesting behavior, observation methods, record keeping, tagging, and tissue sample collection. (PDF file, 121 pp.)
Buffelgrass-Integrated modeling of an invasive plant [More info]: Buffelgrass (Pennisetum ciliare) poses a problem in the deserts of the United States, growing in dense stands and introducing a wildfire risk in an ecosystem not adapted to fire. This report explains what we are doing to help mitigate its effects.
Burrowing owls winter in south Texas [More info]: Experimental use of artificial burrows in south Texas to help in conservation of the migratory burrowing owls (Athene cunicularia) that breed in dry grasslands using animal burrows.
Butterflies and moths of North America [More info]: Information on species of butterflies in North America with photos, checklists, distribution maps, aids to identification, and references.
Catalogue of Polar Bear (Ursus maritimus) Maternal Den Locations in the Beaufort Sea and Neighboring Regions, Alaska, 1910-2010 [More info]: Approximate locations of 392 polar bear maternal dens found between 1910 and 2010, along with the method and year of discovery.
Changing Arctic Ecosystems-Measuring and forecasting the response of Alaska's terrestrial ecosystem to a warming climate [More info]: Combining genetic data with current and predicted climate scenarios, we are modeling the predicted future distributions of wildlife populations in the Arctic and identifying key environmental variables that determine important animal habitat.
Changing Arctic ecosystems-Research to understand and project changes in marine and terrestrial ecosystems of the Arctic [More info]: Three themes of ongoing research: forecasting polar bear and walrus population response to changing marine ecosystems; measuring wildlife population changes in the Arctic coastal plain, and wildlife communities in the boreal-Arctic transition zone.
Changing patterns in the number of species in North American floras [More info]: A chapter of the publication: Land Use History of North America on general patterns of plant species diversity in North America that shows how these patterns have changed over time.

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