Organism groupings (non-taxonomic)
Used for categories of living organisms that are not taxonomic and that include species from more than one taxonomic group.
Hawaiian duck's future threatened by feral mallards [ More info] The greatest threat to the future of the Koloa maoli as a unique species is cross-breeding with the introduced Mallard duck. This type of threat is termed genetic extinction.
Hazards Management in Grand County, Colorado-Fire Fuels Characterization [ More info] Using land cover, vegetation, vegetation health, and other characteristics derived from remote-sensing imagery, we develop geospatial models depicting the susceptibility of this area to wildfires.
Historical landcover changes in the Great Lakes region [ More info] Results of a study that provides a regional vegetation history of the Great Lakes area during the last 150 years compared to the preceding 1,000 years.
History and natural history of the Patuxent Wildlife Research Center [ More info] Links to pages on the history and natural history of Patuxent Wildlife Research Center.
Hydrologic studies in the Upper Klamath Basin, Oregon [ More info] Overview of Klamath ecological research and links to USGS Klamath studies on ground water, nutrients, sediment oxygen demand, and fish response to water quality, sucker ecology, publications, bibliographies, and data.
Identifying predators and fates of grassland passerine nests using miniature video cameras [ More info] Description of the use of a miniature video-camera system deployed at nests of passerine species in North Dakota to videotape predation of eggs or nestlings by animals such as mice, ground squirrels, deer, cowbirds and others.
Improving strategies to assess competitive effects of barred owls on northern spotted owls in the Pacific Northwest [ More info] A scientific study has determined that survey methods designed for spotted owls do not always detect barred owls that are actually present in spotted owl habitat.
Influence of Riparian Tree Phenology on Lower Colorado River Spring-Migrating Birds: Implications of Flower Cueing [ More info]
Invasive crayfish in the Pacific Northwest [ More info] These organisms have negative effects on local ecosystems, but we don't yet know how extensively they have spread. Here is a key to help people identify them.
Invasive lionfish use a diversity of habitats in Florida [ More info] Describes the diversity of habitat types in which invasive lionfish have been reported within Florida's coastal waters, based on lionfish sightings recored in our Nonindigenous Aquatic Species database.
Alphabetical Index of Topics
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