We now have a number of years of data giving a baseline. A negative change in the future can alert us of possible new pollution sources in the watershed.
Saturday, September 7, 2013
Another Day in the River
While large numbers of volunteers cleaned the upper AuSable River of bottles, trash carelessly left behind from a summer of use, Gahagan Preserve members did their September data collection of macro invertebrates today. The species and quantity collected provide a measure of the water quality.