Grazing by a colourless flagellate on a green algal bloom |
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| Authors: | Lars Ramberg |
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| Institution: | (1) Institute of Limnology, University of Uppsala, Sweden;(2) Moi University, P. O. Box 3900, Eldoret, Kenya |
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| Abstract: | A dense bloom of a green algae was reduced by 97% within 5 days. This was probably caused by grazing by a colourless flagellate
that increased logarithmic to high number under these days and disappeared as quickly. After this the green algae increased
rapidly and mucilage lumps excreated by the flagellate was colonized by a specialistChlomydomonas.
The flagellate attack was probably enhanced by the high cell density and the physiological weakness of the green algae, due
to a very low growth caused by shortage of inorganic carbon. The grazing seems to have caused an increase of inorganic nutrients
that promoted the following growth of the green algae. |
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