Helpful Links
Great Lakes Indicators
Biology Indicators

-
Results
from GLNPO's Biological Open Water Surveillance Program of the Laurentian
1999
(PDF) (36 pp, 797Kb)about PDF Files
The monitoring effort is focused on whole lake responses to changes in loadings of anthropogenic substances, so sampling is largely restricted to the relatively homogeneous offshore waters of each lake. - Benthic Community Health
Evaluating the health of the organisms that inhabit the bottom sediments of the Great Lakes and form an essential part of the food chain.
![[logo] US EPA](http://www.epa.gov/epafiles/images/logo_epaseal.gif)