Potamoplankton

potamoplankton

[¦päd·ə·mō¦plaŋk·tən]
(biology)
Plankton found in rivers.

Potamoplankton

 

the passively floating plant and animal life in rivers and other freshwaters with a current. Potamoplankton consists predominantly of diatomaceous algae, rotiferans and water fleas. It results basically from the drifting of planktonic organisms into the river from lakes, swamps, and river backwaters. The pollution of the rivers by industrial and other wastes has a strong influence on the composition and abundance of the plankton.

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In large rivers like the Lower Mississippi River (LMR), abiotic features, such as discharge and light, are usually considered the major factors influencing the biomass and composition of potamoplankton.
Although primary production is minimal in such streams, the algal contribution represents the inocula for the potamoplankton in high-order streams.