- 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 projecting structure on the reef margin or reef front wherein the upper surface flares outward, giving the surface a greater diameter then the basal section.
Industry:Natural environment
A statistical technique for testing for differences in the means of several data populations.
Industry:Natural environment
A world-wide disease of corals that is characterised by a dark ring, or band, that separates apparently healthy coral tissue from freshly exposed coral skeleton. It migrates across coral colonies and completely degrades coral tissue. The infecting agent is a synergestic assortment of photosynthetic and non-photosynthetic bacteria. For more details and illustrations, see: http://www.coral.noaa.gov/coral_disease/black_band.shtm.
Industry:Natural environment
An instrument that identifies the molecular composition and concentrations of various chemicals in water and soil samples.
Industry:Natural environment
Brittle stars are echinoderms (class Ophiuroidea) which are closely related to sea stars (starfish). They possess radial symmetry with a central body disc from which five highly flexible snake-like arms protrude. There is no replication of internal organs,as in the arms of sea stars, just one set in the central disk. Compared to starfish, brittle stars have a much smaller central disc and no anus. Wastes are eliminated through the mouth, which is situated on the undersideof the disc. The name is derived from their arms breaking off as a means of defense. New arms are easily regenerated. They are also called serpent stars because of the snakelike movements of the five arms.
Industry:Natural environment
Having separate sexes. Individuals within the species contain only one or the other of male and female reproductive systems.
Industry:Natural environment
Paleoclimatic evidence that can be used to indirectly infer or estimate some aspect of the paleoenvironment, such as precipitation or temperature. Temperature proxies such as tree ring widths and ice core layering are used by paleoclimatologists to create a past temperature record. Tree ring widths can also be used to infer precipitation changes. Isotopic variations in ice cores can be used to infer temperature changes and ice sheet volume. Beryllium 10 variations can be used to infer past solar irradiance .
Industry:Natural environment
Speciation occurring during a period of geographical isolation.
Industry:Natural environment
The electromechanical component of a sonar system that is mounted underwater and converts electrical energy to sound energy and vice versa.
Industry:Natural environment
The potential evolutionary success of an allele or genotype, which is defined as the reproductive success or the proportion of genes that an individual leaves in the gene pool of a population (expected contribution to future generations). The individuals with the greatest fitness leave the largest numbers of offspring.The fitness of genes and organisms is always relative to the other genes and organisms that are present in the same population.
Industry:Natural environment
