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Plankton secondary productivity and biomass: Their relation to lake trophic state

Hydrobiologia

By:
, ,
DOI: 10.1007/BF00019816

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Abstract

The biomass and production of the most important zooplankton species were followed for two years in three lakes of varying trophic status in the Lake Washington watershed. Cladocerans and copepods were of equal importance in the biomass of lakes Findley and Chester Morse (both oligotrophic), whereas, copepods were the main biomass component in Lake Sammamish (mesotrophic). Cladocerans dominated production in lakes Sammamish and Chester Morse, while in Findley Lake their productive role, like that of biomass, was equal to that of the copepods. Rotifers contributed a relatively small biomass and production. Data from this study supported Hillbricht-Ilkowska's postulate that the energy transfer efficiency between the primary and secondary trophic levels decreases with increasing trophic state. Energy transfer efficiencies for the lakes of this study expressed as a two year mean of the ratio-secondary: primary production, were as follows: Findley Lake-0.13; Chester Morse Lake-0.08; and Lake Sammanish-0.04. On the other hand, the hypothesis of Patalas that the secondary productivity: biomass ratio (P/B) tended to increase in proportion to the productivity of a lake, could not be supported. Lake Sammamish, the most productive of the lakes studied, had a P/B ratio of 0.03 while lakes Findley and Chester Morse had P/B ratios of 0.04. ?? 1976 Dr. W. Junk b. v. Publishers.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Plankton secondary productivity and biomass: Their relation to lake trophic state
Series title:
Hydrobiologia
DOI:
10.1007/BF00019816
Volume
50
Issue:
2
Year Published:
1976
Language:
English
Publisher:
Kluwer Academic Publishers
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
129
Last page:
144