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Cothurnia limnoriae - NSCEP | US EPA - US Environmental ...

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Level 1 Level 2 Level 3 Level 4 Explanation<br />

Facultative<br />

Switches between suspension feeding and other feeding mechanism,<br />

such as deposit feeding.<br />

Deposit Feeder<br />

Ingests sediment particles, feeding on the associated detritus,<br />

microflora, and microorganisms.<br />

Surface Deposit<br />

Feeder<br />

Ingests particles at the sediment interface.<br />

Subsurface Deposit<br />

Feeder<br />

Ingests subsurface particles.<br />

Obligate Feeds only as a deposit feeder.<br />

Facultative<br />

Switches between deposit feeding and other feeding modes, such as<br />

suspension feeding.<br />

Other Feeding mechanism not included in the above list.<br />

Parasite/<br />

Organisms that feed on host and are physiologically / metabolically<br />

Disease<br />

dependent upon host. Usually smaller than host.<br />

Ectoparasite External parasite, including gill parasites.<br />

Endoparasite Internal parasite.<br />

Species deriving nutrition from symbiotic microflora, such as many<br />

Disease<br />

corals. This classification is for the host species; the microflora would<br />

be classified as a primary producer.<br />

Symbiotic<br />

Algae<br />

Species deriving nutrition from symbiotic microflora, such as many<br />

corals. This classification is for the host species; the microflora would<br />

be classified as a primary producer.<br />

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