Record Display for the EPA National Library Catalog
RECORD NUMBER: 583 OF 767
|OLS Field Name||OLS Field Data|
|Main Title||Recommendations for (a) the Reauthorization of the National Invasive Species Act of 1996, and (b) the National Ballast Management Program, to Address Issues of Concern for the Chesapeake Bay Region.|
|CORP Author||Environmental Protection Agency, Annapolis, MD. Chesapeake Bay Program.|
|Publisher||12 May 2001|
|Additional Subjects||Chesapeake Bay ; Marine biology ; Aquatic ecosystems ; Waterways(Water courses) ; Ballast tanks ; Water pollution control ; Ecology ; Water management ; Ecosystems ; Discharge(Water) ; Recommendations ; Environmental effects ; Navigable waters ; Regulations ; Enforcement ; Estuaries ; Coasts ; National Invasive Species Act of 1996 ; Nonindigenous species ; Exotic species|
The worldwide transfer and introduction of nonindigenous species (NIS) by human activities is having significant and unwanted ecological, economic, and human-health impacts. Although marine invasions have received relatively little attention compared to terrestrial and freshwater communities, the extent and consequences of these invasions are becoming increasingly clear. For example, approximately 400 NIS are known to be established in coastal marine waters of the U.S. and over 200 of these can occur in a single estuary. Some of these species have become numerical dominant and significantly alter key population, community, and ecosystem-level processes. In short, it is now clear that invasions by NIS are fundamentally altering the structure and function of our coastal ecosystems.