Blue-Green Algal Inhibition of Diatom Growth: Transition from Mesotrophic to Eutrophic Community Structure

Cell-free filtrates of axenic or bacterized cultures of the dominant blue-green algae from a freshwater lake inhibited the growth of diatoms isolated from the same lake. Lake waters, collected during blue-green algal blooms, also inhibited diatom growth. In situ observations over a 5-year period ind...

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Published inScience (American Association for the Advancement of Science) Vol. 199; no. 4332; pp. 971 - 973
Main Author Keating, Kathleen Irwin
Format Journal Article
LanguageEnglish
Published United States American Association for the Advancement of Science 03.03.1978
Subjects
Algae
Algal blooms
Bioassay
Cyanobacteria
Diatoms
Fresh water
Lake water
Lakes
Plankton
Sea water
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Summary:Cell-free filtrates of axenic or bacterized cultures of the dominant blue-green algae from a freshwater lake inhibited the growth of diatoms isolated from the same lake. Lake waters, collected during blue-green algal blooms, also inhibited diatom growth. In situ observations over a 5-year period indicate that diatom bloom populations vary inversely with the levels of the preceding blue-green algal populations. Blue-green algal dominance of eutrophic lakes is attributed to this allelopathy, and dilution is proposed as one cause for the limited occurrence of blue-green algal dominance in marine waters.
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ISSN:0036-8075
1095-9203
DOI:10.1126/science.199.4332.971