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Grazing of ciliates on blue–green algae: Effects of light shock on the grazing relation and on the algal population
Author(s) -
Bader F. G.,
Tsuchiya H. M.,
Fredrickson A. G.
Publication year - 1976
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260180305
Subject(s) - grazing , ciliate , algae , population , biology , grazing pressure , light intensity , shock (circulatory) , algal bloom , photosynthesis , ecology , botany , phytoplankton , nutrient , medicine , physics , demography , sociology , optics
Experiments on the grazing of the ciliate Colpoda steinii on the blue–green alga Anacystis nidulans showed, among other things, that declines of the algal population initiated by grazing often continued for several days after grazing pressure had been released. In addition, long lags were observed when this alga was inoculated into sterile culture medium. Evidence presented in this study indicates that both phenomena were due to cellular damage caused by exposure of algal cells to a sudden increase of light intensity (“light shock”). The occurrence of light shock appeared to exert a destabilizing influence on the grazing relation between Colpoda and Anacystis .