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Ecosystems
The interacting populations of plants, animals, and microorganisms occupying a certain area, and their relationship to the environment.
Subtopics:
Aquatic ecosystems (104 items)
Terrestrial ecosystems (88 items)
Wetland ecosystems (25 items)
Related topics:
Results 41 - 50 of 220 listed by similarity [list alphabetically]
Atchafalaya & Mississippi River Deltas study: a tale of two deltas [New Window]
Project of the Gulf of Mexico Integrated Science program that evaluates the transport and sedimentation of contaminates through the Mississippi River and Atchafalaya River delta to the near-shore Gulf of Mexico. Includes aerial photographs.
PDF Beyond the Golden Gate--oceanography, geology, biology, and environmental issues in the Gulf of the Farallones [New Window]
A geologic and oceanographic study of the waters and Continental Shelf of Gulf of the Farallones adjacent to the San Francisco Bay region. The results of the study provide a scientific basis to evaluate and monitor human impact on the marine environment.
Biological and ecotoxicological characteristics of terrestrial vertebrates residing in estuaries [New Window]
Biomonitoring of Environmental Status and Trends (BEST) program is designed to assess and monitor the effects of environmental contaminants on biological resources with links to detailed information on specific species.
Biological resource status and trends: Caves and subterranean habitats [New Window]
Information concerning status and trends of biological resources, focusing on caves and subterranean habitats
Biological resource status and trends: Terrestrial invasive organisms [New Window]
Information concerning status and trends of biological resources, focusing on terrestrial invasive organisms
Biological resource status and trends: Wetlands [New Window]
Information concerning status and trends of biological resources, focusing on wetland ecosystems
Biological soil crusts [New Window]
Explains biological soil crusts, organism-produced soil formations commonly found in semiarid and arid environments, with special reference to their biological composition, physical characteristics, and ecological significance.
PDF Biological soil crusts: webs of life in the desert [New Window]
Fact sheet on the need to protect biological soil crusts in the desert. These crusts are most of the soil surface in deserts not covered by green plants and are inhabited by cyanobacterium (blue-green algae) and other organisms useful to the ecosystem.
Bird Point Count Database [New Window]
Perform custom searches for bird count and bird habitat data or enter your bird count and vegetation data.
PDF Born of fire: restoring sagebrush steppe [New Window]
USGS Forest and Rangeland Ecosystem Science Center: fact sheet in Adobe PDF about the studies to restore sagebrush steppe
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