Coral reefs

Coral reefs

Coral reefs are structures formed from the calcium carbonate secretions of corals. They are colonies of tiny animals in marine areas containing few nutrients.

Industry: Natural environment

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Coral reefs

Sampling error

Natural environment; Coral reefs

The variability of a statistic from sample to sample due to chance.

National Environmental Policy Act (NEPA)

Natural environment; Coral reefs

Passed in 1969, the purposes of NEPA are: to declare a national policy which will encourage productive and enjoyable harmony between man and his environment; to promote efforts which will prevent or ...

Polyclad flatworm

Natural environment; Coral reefs

A free-living flatworm belonging to the order Polycladida (Class Turbellaria; Phylum Platyhelminthes). Many species are coral reef inhabitants.

Elasmobranch

Natural environment; Coral reefs

A member of the Subclass Elasmobranchii of cartilaginous fishes. These include sharks, rays, and skates.

Natural climate record

Natural environment; Coral reefs

A record of climatic events found by examining the natural environment (e.g., coral growth bands, tree rings, layers of ice in glaciers).

Seamount

Natural environment; Coral reefs

A submarine mountain, usually conical in shape and volcanic in origin, that rises 1000 metres or more above the sea floor. Some definitions of seamounts do not include the height criterion.