USGS - science for a changing world

Science Topics

Maps, Imagery, and Publications Hazards Newsroom Education Jobs Partnerships Library About USGS Podcasts/RSS
You are here: Categories > Topics > Biological and physical processes
Help
Ecological processes
Dynamic biogeochemical interactions that occur among and between biotic and abiotic components of the biosphere.
Subtopics:
Algal blooms (3 items)
Bioaccumulation (5 items)
Biogeochemical cycling (14 items)
Biological productivity (1 items)
Contaminant transport (25 items)
Dispersal (organisms) (2 items)
Ecological competition (2 items)
Ecosystem functions (16 items)
Eutrophication (6 items)
Extinction and extirpation (3 items)
Habitat alteration (13 items)
Migration (organisms) (4 items)
Pollination (3 items)
Succession (biological) (1 items)
Transpiration (3 items)
Related topics:


Results 11 - 20 of 100 listed alphabetically [list by similarity]
Boston Harbor Studies: the fate of sediments and contaminants in Massachusetts Bay [More info]
Boston Harbor/Massachusetts Bay Studies research project conducted as part of Boston Harbor cleanup to predict the fate of contaminants and sediments introduced to Massachusetts' coastal waters from sources that include Boston sewage outfall.
PDF Bryophytes and lichens, small but indispensable forest dwellers [More info]
Description of bryophytes (mosses, liverworts, and hornworts) and lichens (dual organisms of a fungus and an alga or a cyanobacterium) that are part of forest ecosystems in the Pacific Northwest with information on habitat and conservation.
Classification of natural ponds and lakes in the glaciated prairie region [More info]
Presents a wetland classification system that reflects seasonal, regional, and local variations in the environment.
Climate-Driven Ocean Changes Affect Estuaries [More info]
Research findings and examples of application to real problems--Pacific Ocean cooling triggers phytoplankton blooms in San Francisco Bay.
PDF Coal-tar-based pavement sealcoat, polycyclic aromatic Hydrocarbons (PAHs), and environmental health [More info]
Pavement sealant contains chemicals that are known carcinogens, which get into nearby homes, lakes, and the air. Sealants based on coal tar release more dangerous chemicals than those based on asphalt.
Coastal ocean modeling at the USGS Woods Hole Field Center [More info]
Fly-by and circulation movies, effluent concentration, tidal flushing, sea level, and temperature in Massachusetts Bay and Boston Harbor
Columbia Environmental Research Center [More info]
Website for the Columbia Environmental Research Center with links to staff, publications, databases, field stations, and projects including those on the Rio Grande, burrowing owls, sea turtles, and geospatial technology.
Columbia Environmental Research Center (CERC) Ecology Branch [More info]
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.
Connectivity of tropical marine ecosystems--An overview of interdisciplinary research to understand biodiversity and trophic relationships in the Virgin Islands and Puerto Rico [More info]
Describes research to assess the effectiveness of the current system and distribution of marine reserves and protected areas in the Virgin Islands and Puerto Rico for conserving reef ecosystems and resources.
Contamination in Fractured Rock Aquifers [More info]
Overview of fractured rock research aimed at understanding the movement of water through fracture networks, and characterize field conditions influencing contaminant migration. Includes programs and publications.
Result pages:Previous 1 2 3 4 5 6 7 ... NextAll
Alphabetical Index of Topics a b c d e f g h i j k l m n o p q r s t u v w x y z

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.usgs.gov/science//science/science.php?thcode=2&term=310&n=10&order=alpha&b=10
Page Contact Information: Ask USGS