They are a vital part of the kelp forest ecosystem, which provides food and shelter for diverse ocean species and ... the role of biotic and abiotic factors that affect the kelp forest community ...

This film explains the difference between biotic and abiotic, terrestrial, freshwater and ocean water ecosystems ... such as worms and beetles. Abiotic Factors: Non-living elements of an ecosystem.

Abiotic factors are non-living chemical and physical elements in the environment, which affect individual organisms as well as ecosystems. Examples are UV, IR and visible light, radiation ...