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Algae in plankton and muddy sediments as well as in a food content of the larvae Chironomus F.L. Plumosus (L.) of the Szczecin lagoon (The Great Lagoon)

Wolnomiejski N., Luścińska M, Grygiel I.

Oceanological Studies

2000

Vol. 29, No. 2

43-56

Species composition of the algae as well as frequencies of their occurrence in a food content of the Chironomus larvae were usually showing a distinctive correlation to the plankton algae rather than to the algae from the mud sediments surface. The main food of the larvae was a filtered phyto-plankton matter decomposed by bacteria. In the reolimnian part of the Lagoon with the sedimentation of the dead phytoplankton restricted by a water-flow, there were poor feeding conditions for the benthos. The main factor that restricted the quantitative growth of the chironomids larvae in that part of the Lagoon was largely because of their feeding on the algae from the sediments.