Fordham University            The Jesuit University of New York
 



Dynamics and Role of Phytoplankton Communities in Large Rivers

Research on phytoplankton in large rivers has had a long history, yet their importance in these enormous ecosystems is still not well known or appreciated. Our work began with longitudinal studies on a geologically restricted, 360 km long region of the Ohio River, and examined the effects of navigation (“low-head”) dams, tributaries and littoral zones on the abundance and species composition of phytoplankton. We have begun collaborating with scientists at the US Geological Survey in La Crosse, Wisconsin to examine factors affecting phytoplankton production in the upper Mississippi River, using a 10-year sample program coupled with data on discharge, nutrient conditions, backwaters, and other landscape variables.  


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