WINTER PRIMARY PRODUCTIVITY IN LAKE PEPIN 

Robert M. Burdis and Walter A. Popp
Minnesota Department of Natural Resources, Long Term Resource Monitoring
Program,
1801 South Oak St., Lake City, MN 55041

Lake Pepin, a natural impoundment of the Mississippi River has received
considerable attention in the past few years due to severe nuisance algal blooms
and fish kills that occurred during low flow in 1988.  Emphasis has been placed
on the origin, both internal and external, of phosphorus in Lake Pepin and the
potential effects on water quality if loading is reduced.  Most of the work has
focused on summer water quality conditions because this is the period of high
recreational use and potential nuisance algal blooms.

Data collected by the Minnesota Department of Natural Resources, as part of
the Federal Long Term Resource Monitoring Program,  indicate high winter
primary productivity in Lake Pepin in  years with low discharge and minimal
snow cover.  This poster examines winter primary productivity and phosphorus
loading in Lake Pepin from 1991 to 1996.

Keywords: winter primary productivity, phosphorus, Lake Pepin, discharge,
snow cover





Robert M. Burdis, Minnesota Department of Natural Resources, Long Term
Resource Monitoring Program, 1801 South Oak St., Lake City, MN 55041;
Tel: 612/345-3331; FAX 612/345-3975; robert_burdis@nbs.gov

Poster (no)
Non-student