- Industry: Government
- Number of terms: 30456
- Number of blossaries: 0
- Company Profile:
NOAA Coral Reef Conservation Program, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
A group of populations, usually of the same species, which exist at the same time but in different places. The dispersed population can replenish one another with migrants.
Industry:Natural environment
A muscular contraction in which tension increases while the length of the muscle remains constant.
Industry:Natural environment
A sense organ on upper side of head in many branchiopods; photoreceptor-like sensory cells in the nuchal region (posterodorsal region of the head) of some cephalopods; paired chemosensory structures in some annelids.
Industry:Natural environment
Anaerobic bacteria in soil or water that use the nitrate ion as a substitute for molecular oxygen during their metabolism. The nitrate is reduced to nitrogen gas (N2), which is lost to the environment during the process.
Industry:Natural environment
In fishes, a superficial or internal organ which complements the gills in respiration when the fish is in poorly oxygenated water or in air.
Industry:Natural environment
Products used in the aquarium trade. Coral rock is consolidated material, greater than 3 cm in diameter, formed of fragments of dead coral and which may also contain cemented sand, coralline algae and other sedimentary rocks. 'Live rock' describes pieces of coral rock to which are attached live specimens of invertebrate species and coralline algae.
Industry:Natural environment
The appearance or characteristics of one organism that copies or "mimics" another in order to gain some advantage; the organism may resemble some other natural object as an aid in concealment.
Industry:Natural environment
The internal, usually calcium carbonate skeletal rod of sea fans (Gorgonacea) and sea pens (Pennatulacea).
Industry:Natural environment
The relatively shallow water zone that extends from the high tide mark to the edge of the continental shelf.
Industry:Natural environment
Travel undertaken to experience sites or regions of unique natural or ecological quality, or the provision of services to facilitate such travel.
Industry:Natural environment
