USGS: Science Topics: ecosystems

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You are here: Topics > Population and community ecology

Ecosystems

The interacting populations of plants, animals, and microorganisms occupying a certain area, and their relationship to the environment.

Subtopics:
Aquatic ecosystems (132 items)
Terrestrial ecosystems (100 items)
Wetland ecosystems (34 items)

Related topics:

Results 91 - 100 of 264 listed alphabetically [list by similarity]

Fire ecology research [More info]: Study of wildland fire history and fire ecology such as plants in the Sierra Nevada forests, California shrublands, the Mojave, and Sonoran deserts to develop management techniques that will reduce hazards.
Fisheries: Aquatic and endangered resources program [More info]: This program is focused on the study of fishes, fisheries, aquatic invertebrates, and aquatic habitats, and evaluates factors that affect aquatic organism health, population fitness, biological diversity, and aquatic community and habitat function.
Floristic Quality Index: An assessment tool for restoration projects and monitoring sites in coastal Louisiana [More info]: Explains how we assessed the quality of a wetland as indicated by its plant species composition and abundance for marsh and swamp sites, to summarize the effectiveness of restoration projects in Louisiana.
Forecasting the effects of land-use and climate change on wildlife communities and habitats in the lower Mississippi Valley [More info]: Describes the analytical process by which spatial scientific information contributes to forecasts and models in support of regional and local decision-making.
Forest and Rangeland Ecosystem Science Center [More info]: Home page of the Forest and Rangeland Ecosystem Science Center, Corvallis, providing research and technical support for ecosystem management in the western U.S. Links to projects, field stations, fact sheets, partnerships, and publications.
Forest and Rangeland Ecosystem Science Center: Fact Sheets [More info]: Access to Forest and Rangeland Ecosystem Science Center fact sheets on fish, fish diseases, aquatic resources, and other projects and activities.
Forest and rangeland birds of the United States: natural history and habitat use [More info]: Catalog of bird species common to forest and rangeland habitats in the U.S. with natural histories including taxonomic information, range, and habitat descriptions to assist land managers in resource management. Text available as a *.zip file.
Fort Collins Science Center [More info]: Homepage of the Fort Collins Science Center in Colorado with links to programs in ecological research programs, staff directory, products library, news and events, and research features and spotlights.
Fragile environments: San Francisco Bay wetlands [More info]: Overview with links to studies on the effects of human activity on the San Francisco estuary with loss of historic fresh and saltwater tidal marshes reducing habitats, introducing contaminants in waste, and creating dredging problems.
From ridge to reef--linking erosion and changing watersheds to impacts on the coral reef ecosystems of Hawai‘i and the Pacific Ocean [More info]: Explains how land processes on hills near the shoreline affect the health of coral reefs.

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