The classification system by which coal is classified into resource/reserve base/reserve categories on the basis of the geologic assurance of the existence of those categories and on the economic feasibility of their recovery.
Declines in fish and wildlife populations, water-quality issues, and changes in coastal habitats have prompted this USGS study of the region's nearshore life and environment. Includes links to data from published reports.
Overview of research of the Ecology Branch on the ecological consequences of habitat degradation due to altered environment, nonindigenous species, and atmospheric alterations. Includes links to staff and research projects.
The Contaminant Biology Program investigates contaminant exposure and effects on fish, wildlife, and other organisms, their habitat and ecosystems. Links include description of projects, research centers, and news.
Describes the Conte Anadromous Fish Laboratory of the Leetown Science Center, which performs research directed towards restoration and protection of anadromous fish with lists of research projects and facilities.
Assessment of the importance of the Conservation Reserve Program in preventing the decline of grassland breeding birds by preserving grassland habitats in North Dakota. Published as Wilson Bulletin v. 107 no. 4, pp. 709-718 (1995).
Crustal imaging and characterization home with links to projects on earth science technologies including geophysical, geochemical, and isotope studies, online publications and data, and newsletter Minerals News.