Bacterio Plankton
85
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Fig. 3.4. Spectrum of feeding in some reef filter-feeding benthic animals; kinds of food
offered: 1 natural bacterioplankton; 2 the same devoid of the aggregates by prefiltration
via filter with 3/l pores; 3 phytoplankton. Animals in experiments: A sedentary
polychaete worm Megalomma sp.; B sponge Toxadocea; C ascidian A. nigra; D oyster
clam Crassostrea; R food ration per day, % of carbon content in the body of animal.
(After Sorokin 1978b)
Fig. 3.5. Decrease of concentration of
microplankton in water in presence of reef
filter-feeders: 1 sponge Toxadocea; 2 sedentary
polychaete Megalomma; 3 ascidian A. nigra; 4
oyster Crassostrea. Kinds of microplankton: 1
natural bacterioplankton; 1/ the same devoid of
aggregates by pre filtration through filter with
pores of 3/l; 11/ phytoplankton (dinoflagellates
Prorocentrum); T time of exposure; Bb biomass
of microplankton in water, mgm- 3 of wet
weight. (Data by Sorokin 1978b)
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