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RECORD NUMBER: 228 OF 307

OLS Field Name OLS Field Data
Main Title Quantitative Differences between Benthic Algal Communities Along a Depth Gradient in Lake Michigan.
Author Stevenson, R. J. ; Stoermer, E. F. ;
CORP Author Michigan Univ., Ann Arbor. Great Lakes Research Div.;Environmental Research Lab.-Duluth, MN.
Year Published 1981
Report Number CONTRIB-276; EPA-R-803037; EPA-600/J-81-639;
Stock Number PB83-243253
Additional Subjects Algae ; Ecology ; Lake Michigan ; Diatoms ; Abundance ; Depth ; Underwater light ; Growth ; Substrates ; Lake waves ; Reprints ; Species diversity ; Habitats
Holdings
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Status
NTIS  PB83-243253 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 11p
Abstract
This study analyzes the impact of conditions associated with depth upon benthic algal communities in Lake Michigan. Diatom abundance was greater at 9.1 and 14.6 m depths than 6.5, 22.6 and 27.4 m. Shallow (6.5 m), mid-depth (9.1 and 14.6 m) and deep (22.6 and 27.4 m) zones were distinguishable on the basis of community composition, structure and abundance. Dominance of benthic species, high diversity and low abundance in shallow communities probably resulted from substantial substrate disturbance by wave action in this productive zone. Preponderance of living planktonic taxa, low diversity and low abundance delineated deep communities where planktonic algae accumulated and low light levels reduced growth of benthic species.