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The isolation of cyclic adenosine 3′:5′‐monophosphate (cAMP) from lakes of differing trophic status: Correlation with planktonic metabolic variables 1
Author(s) -
Francko David A.,
Wetzel Robert G.
Publication year - 1982
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1982.27.1.0027
Subject(s) - phytoplankton , trophic level , plankton , littoral zone , chlorophyll a , adenosine , productivity , particulates , ecology , chemistry , biology , environmental chemistry , nutrient , botany , biochemistry , macroeconomics , economics
The seasonal dynamics of particulate and dissolved cyclic adenosine 3′:5′‐monophosphatc (cAMP) were examined in the epilimnia and littoral zones of two trophically dissimilar lakes. Each cAMP fraction was found in quantities comparable to those reported for cultured phytoplankton species. Both cAMP fractions varied greatly in concentration during the season and between the oligotrophic and hypereutrophic lakes. Increases in phytoplankton community densities were paralleled by weight‐specific changes in particulate cAMP levels, depending on the phytoplankton species present. A linear relationship between cellular cAMP levels and in situ primary productivity rates was found in the oligotrophic lake. In both lakes, certain phytoplanktonic associations had particulate cAMP levels linearly related to chlorophyll a content and specific activity of alkaline phosphatase.