Title Work Title No: 24347 Medium: Moving Image Date: 1978 (Release) Original Summary: "Underwater photography and cinemicrography show life in three fresh-water ecosystems: fast-moving water, slow-moving water, and standing water. The important, interrelated concepts of habitat, adaptation, and ecological niche are defined, as well as populations, food chains, transference of energy, and the interaction among organisms. J.H. Sather and D.A. Casteel" - Summary from Worldcat. Countries of Origin: U.S.A. Genres: Educational
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