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Factors that Control the Species Composition of Freshwater Phytoplankton, with Special Attention to Nutrient Concentrations
Author(s) -
Aakanishi Masami,
Monsi Masami
Publication year - 1976
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.3510610404
Subject(s) - eutrophication , algae , phytoplankton , nutrient , photosynthesis , plankton , biology , chlorophyll a , botany , population , chlorella , chlorophyll , ecology , environmental science , environmental chemistry , chemistry , demography , sociology
Variations of species composition and population size of planktonic algae were studied in relation to the different nutrient levels in a eutrophic pond and an oligotrophic lake. The results obtained were discussed in comparison with the changes in photosynthesis and chlorophyll of several algal populations cultured under different nutrient conditions. As based on unialgal culture experiments two types of algae (the Chlorella ‐type and the Melosira ‐type) could be distinguished with regard to variations of photosynthesis and chlorophyll in response to different nutrient levels. Distribution of the Chlorella ‐type algae may be confined to eutrophic waters, while the Melosira ‐type algae can be distributed widely in waters from oligotrophic to eutrophic.