Benthic and Pelagic Secondary Production in Lake Erie after the invasion of Dreiessena spp. With Implications for Fish Production

摘要

Benthic and pelagic secondary production were measured at nearshore and offshore sites in the western, west-central, and eastern basins of Lake Erie in 1993 to determine the relative importance of enthic and pelagic foodwebs to the fish community after dreissenid colonization. Benthic biomass increased greatly between 1979 and 1993 because of the presence of dreissenids, and >90/100 of benthic production in 1993 came from dreissenids. Biomass of "other" benthos (excluding unionids and dreis- senids) did not decline.