||Seasonal Abundance and Spatial Distribution of Lake Michigan Macrobenthos, 1964-67.
Alley, Wayne P. ;
Mozley., Samuel C. ;
||Michigan Univ., Ann Arbor. Great Lakes Research Div.;California State Univ., Los Angeles. Dept. of Biology.;Environmental Protection Agency, Chicago, Ill. Region V.;National Science Foundation, Washington, D.C.;Federal Water Pollution Control Administration, Washington, D.C.
||SR-54; NSF-GA-1337, EPA-68-01-2650; EPA/905/9-75/004;
Lake Michigan ;
Seasonal variations ;
Marine microorganisms ;
Spatial distribution ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
Lake Michigan macrozoobenthos were sampled lakewide on 16 cruises between August 1964 and July 1967. Additional stations in a south end study were sampled less frequently. Zoobenthic samples were analyzed as counts (Amphipods, Oligochaeta, Sphaeriidae and Chironomidae), formalin dry weight and biomass (ash-free dry weight). Average total counts, dry weight and biomass were significantly less in the south end. Further, the proportion of amphipods was less while the proportion of oligochaetes increased substantially going from north to south in Lake Michigan. Abundance and biomass in the lake-wide survey were influenced by station depth, upwelling and distance from shore.