Book Description

This report is the second of a two-part series that presents the basic results of a benthos sampling program in southeastern Lake Michigan. Sediment cores were collected at monthly intervals from may to November 1978 and 1979 by divers using SCUBA. Sampling was conducted at two stations located at the 11-12 m depth interval. Organism retained on screens with aperture openings of 595 [mu]m, 250 [mu[m, 106 [mu]m, and 45 [mu]m were counted and identified to the lowest practical taxonomic level. results are presented in two tables that give the following data: (1) abundance of each taxa in each replicate core (2) dry weight biomass (mg) of the major benthic groups in each replicate core. Supplementary tables of 1976-77 sample data are also provided, These tables give the density and dry weight of epibenthic crustaceans collected in both the sediments and in the overlying waters (water in core tube). The first data report (Nalepa and Quigley 1980) gave the density and dry weight of only those collected in the sediments.