They appear like permanent lines on maps, but coastlines are in constant flux, eaten away by erosion and extended by deposits of sand and stone carried by water. This program looks at the vegetation that is gradually established; at the continental shelves; at the extraordinary and diverse forms of life that flourish at water’s edge or in shallow waters, on land and in the water; and at the structure of coral reefs. (28 minutes)

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Part of the Series : Man and the Biosphere

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		Life in Arid and Semi-Arid Lands This program explains what a desert is, why it occurs, what kinds of plant and animal life it sustains, and how that life is adapted to-or adapts to-the lack of water. The primary focus is on the effects of growing populations in arid or semi-arid re...(more details)		VHS $99.95 DVD $99.95
		Lagoons Lagoons are nature's preserve for fish, waterfowl, alligators and other reptiles, and mangroves and other indigenous vegetation. The nature of the lagoon-its calm waters, which make for good fishing and provide an excellent port-has proved a lure to ...(more details)		VHS $99.95 DVD $99.95

See additional titles in Oceanography | Ecosystems