Digestion of chlorophylls and carotenoids by the marine protozoan Oxyrrhis marina studied by h.p.l.c. analysis of algal pigments |
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Authors: | Klein Bert; Gieskes Winfried W C; Krray Gijsbert G |
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Institution: | Netherlands Institute for Sea Research PO Box 59, 1790 AB Den Burg (Texel), The Netherlands
1Present address: Station Marine de Roscoff, Place Georges Teissier 29211 Roscoff, France |
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Abstract: | Algal pigments were measured, by reverse-phase h.p.l.c., duringgrazing experiments with the protozoan Oxyrrhis marina Dujardinon Rhodomonas sp. Chlorophylls and carotenoids were degradedto colourless residues; the rate of degradation of pigmentswas highest in the light. Very little chlorophyll a (5%) wasdegraded to phaeophytin and none to phaeophorbide during grazing.This suggests that phaeopigment concentrations cannot be usedas a measure of algal mortality due to grazing when heterotrophicProtozoa are a component of the grazer community. |
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