- Industri: Government
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NOAA Coral Reef Conservation Program, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
A minute growth line on the outer surfaces of corals that have a calcified outer wall. The carbonate is produced by zooxanthellae which create a series of diurnal growth increments.
Industry:Natural environment
A symbiotic association in which one symbiont lives in close association with another, generally in the tube or burrow or actually within a body chamber of the host.
Industry:Natural environment
An adventitious root in mangroves that originates from the branches, and roots in the surface-sediments.
Industry:Natural environment
Component of motion toward or away from a given location.
Industry:Natural environment
In colonial octocorals, e.g., sea pens, one polyp grows very large and loses its tentacles, forming the central supporting axis. This is the primary polyp. The base of this primary polyp forms a bulb, which anchors it to the substratum. Branching off this primary polyp are various secondary polyps. Some are specialized for feeding (autozoids). Others (siphonozooids) serve as intakes for water, which circulates within the colony and help keep it upright .
Industry:Natural environment
The ability to distinguish closely spaced objects on an image or photograph. It is commonly expressed as the spacing, in line-pairs per unit distance, of the most closely spaced lines that can be distinguished.
Industry:Natural environment
