Bibliographic Detail

Stoermer, E.F. & Yang, J.J., 1969

Reference:
Stoermer, E.F. & Yang, J.J. (1969). Plankton diatom assemblages in Lake Michigan. Special Report Great Lakes Research Division University of Michigan 47: 1-268.

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; CONSTITUTENTS 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. (JONES-WISCONSIN)

 

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