US Geological Survey
Usgs: Earth Surface Dynamics (Research Activities)
This site from USGS provides several activities to help understand the interrelationships among earth surface processes, ecological systems, and human activities. Also included are links to new findings and programs concerning Earth...
University of Florida
Florida Museum: South Florida Aquatic Environments: Introduced Species
The transport of living plants and animals to areas beyond their native range has been practiced by human beings for thousands of years. While some introductions are intentional, others occur by accident or happenstance. Regardless of...