Sentences with phrase «filtering small organisms»
«Bivalves such as oysters are also filter feeders that obtain their food by pumping water through their system and filtering small organisms,» she said.
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The secret is in the baleen, a complex filter - feeding system that allows the enormous whales to strain huge volumes of saltwater, leaving only krill and other small organisms behind.
Most sea sponges feed on single - celled organisms, which they filter from water, but some are more voracious, catching small crustaceans.
After an extended period of use, the pore structure of a mechanical filter tightens up, and commensurately removes some smaller particles; but, this characteristic is not suitable for removal of all viruses, smaller parasitic organisms, and very fine solids.
Upwelling is a crucial process because it provides the raw nutrients for phytoplankton to grow, creating a rich source of food for filter feeders and small fish and, in turn, larger fish and other organisms higher up the food chain.