Aquatic Disposal Field Investigations, Ashtabula River Disposal Site, Ohio. Appendix A. Planktonic Communities, Benthic Assemblages, and Fishery.
Final rept. Jun 75-Sep 76,
STATE UNIV OF NEW YORK COLL AT BUFFALO GREAT LAKES LAB
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An investigation to evaluate impacts of the release of dredged material on phytoplankton, zooplankton, benthic macroinvertebrates, and fish was conducted in Lake Erie off Ashtabula, Ohio, from June 1975 through September 1976. Samples and measurements were taken prior to, during, and after the release of materials from a hopper dredge during August 1975 and May 1976. The pelagic biota phytoplankton, zooplankton, and fish along with primary productivity were only mildly impacted and recovery was relatively rapid. The benthic communities were altered with the decline of some species and introduction of new fauna transported from the dredged sites. Within a year species diversity had largely returned to predisposal levels. However, the community structures were slightly altered. These changes were similar to those noted in marine environment exposed to dredged material. Author
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