USGS Biology Programs
- Biological informatics program
- Contaminant biology program
- Fisheries: aquatic and endangered resources program
- Invasive species program
- Status and trends of biological resources program
- Terrestrial, freshwater, and marine environments program
- Wildlife: terrestrial and endangered resources program
Biologic Investigations
Ground Water Resource Association of California, 2006, Integrated management of hydrology & endangered species in the Sweetwater river basin.
http://www.grac.org/annualmeeting06.asp
Langis, Rene, Zalejko, Malgorzata, and Zedler, Joy B., 1991, Nitrogen Assessments in a Constructed and a Natural Salt Marsh of San Diego Bay: Ecological Applications, Vol. 1, No. 1, p. 40-51.
http://links.jstor.org/sici?sici=1051-0761%28199102%291%3A1%3C40%3ANAIACA%3E2.0.CO%3B2-5

