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Biogeographic regions
Geographic regions characterized chiefly by the dominant forms of plant life and the prevailing climate. [Adapted from American Heritage Dic. of the English Language, 4th ed.]
Alexandria Digital Library Feature Type Thesaurus
Subtopics:
Deserts (10 items)
Forests (7 items)
Grasslands (11 items)
Habitats (2 items)
Shrublands (2 items)
Tundras (3 items)
Wetlands (39 items)
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Results 1 - 10 of 68 listed alphabetically [list by similarity]
PDF Amphibian monitoring in the Atchafalaya Basin [More info]
They're abundant in this area, but hard to count reliably. We outline a procedure for estimating the population sizes so that we can determine whether they're increasing or dwindling. We must both listen for their calls and visually confirm them.
An overview of coastal land loss with emphasis on the southeastern United States [More info]
Comprehensive background information on coastal land loss, discussing the influence of waves and storms, the intrinsic characteristics of the shoreline materials, and the role of human activities.
Atchafalaya & Mississippi River Deltas study: a tale of two deltas [More info]
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 Avian conservation in the Prairie Pothole Region, Northern Great Plains-Understanding the links between climate, ecosystem processes, wetland management, and bird communities [More info]
Small wetlands in this large area have hosted migratory birds for a long time, but with changes in agricultural practice and regional climate those habitats may not remain hospitable to the wild populations.
Biological and ecotoxicological characteristics of terrestrial vertebrates residing in estuaries [More info]
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: Desert ecosystems [More info]
Information concerning status and trends of biological resources, focusing on desert ecosystems
Biological resource status and trends: Forest ecosystems [More info]
Information concerning status and trends of biological resources, focusing on Forest ecosystems
Biological resource status and trends: Grassland ecosystems [More info]
Information concerning status and trends of biological resources, focusing on Grassland ecosystems
Biological soil crusts [More info]
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 [More info]
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.
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