Skip to main content


Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

The Clinch/Powell watershed in southeast U.S. harbors an unusual number of threatened mussel and fish species and they are declining rapidly. USEPA's ecological risk assessment framework was used to determine likely causes of fauna decline and potentially effective management strategies. All data were stored in a Graphical Information System (GIS) and the overlap of land use coverages and biological data were used to create and test hypotheses. Analyses of one subwatershed suggested that agricultural activities in the riparian zone had more influence on stream habitat quality, mussel species richness, and fish IBI than agricultural activity further upland. Furthermore, upland agricultural best management practices (BMPs) implemented during the 1980s were relatively ineffective in decreasing sedimentation instream, resulting in further declines in native mussels in that subwatershed. For the Clinch and Powell watershed as a whole, fish IBI and mussel species richness were likely to be poor if the riparian corridor comprised > 50% agricultural land cover. Forward stepwise multiple regression indicated that percent cropland, pasture area, and proximity to urban areas, mining, and major highways affected fish IBI. Analyses of co-occurring stressors indicated that native fish and mussel populations were at greatest risk in upper reaches of the watershed, fragmenting populations and further promoting species decline. GIS mapping of stressor sources and native mussel concentration sites indicated that several currently viable populations are vulnerable to extirpation unless further management options are implemented. Our results indicate that restoration and maintenance of naturally vegetated riparian corridors, as well as more rigorous implementation of agricultural BMPs, may help protect declining threatened and endangered native species in this watershed.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: 2000-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more