Record Display for the EPA National Library Catalog

RECORD NUMBER: 579 OF 1026

Main Title Plankton Diatom Assemblages in Lake Michigan.
Author Stoerme, E. F. ; Yan, J. J. ;
CORP Author Michigan Univ., Ann Arbor. Great Lakes Research Div.
Year Published 1969
Report Number FWQA-18050-DKE; 05984,; 18050-DKE-12/69
Stock Number PB-198 087
Additional Subjects ( Diatoms ; Lakes) ; ( Water pollution ; Plankton) ; Plants(Botany) ; Growth ; Seasonal variations ; Taxonomy ; Populations ; Water quality ; Ecology ; Food chains ; Michigan ; Lake Michigan
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Status
NTIS  PB-198 087 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 273p
Abstract
The various elements of Lake Michigan plankton diatom flora, their seasonal cycles, and history of changes were determined and genera and species are listed. Absolute frequency, relative frequency, and contribution to diversity of each taxon were computerized. Occurrence of the different entities were recorded: those associated with certain water quality conditions; constituents of only extremely oliogotrophic floras, rapidly replaced in disturbed portions of the lake; those more tolerant of changing conditions but rapidly reduced in abundance with extensive chemically measurable changes; other entities seemingly favored by slight increases in trophic level, flourishing in moderately disturbed portions of the lake, but declining when pollution increases; those formerly able to thrive only in naturally eutrophic estuaries and inshore areas, favored by increasing pollution and now flourishing in highly disturbed open lake areas; the final general group of dominant plankton species including those taxa, apparently not able to live in the original conditions of Lake Michigan but introduced following pollution. All of the plankton diatoms associated with extreme water quality degradation in the Great Lakes system are now present in Lake Michigan, indicating critical pollution levels. (WRSIC abstract)