- 行业: 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 slope or cliff seaward of the fore reef terrace, at a depth of about 25-30m.
Industry:Natural environment
A tool used in the performance of visual fish censuses. An APT is a T-shaped, meter-long reference device used by scientific divers for measuring habitat vertical relief, estimating fish lengths, and the location of the center and outer edge of the sample cylinder. The shaft is a PVC t-stick marked at 10cm intervals with a 30cm cross-piece marked at 1cm intervals.
Industry:Natural environment
An atoll whose rim is less than 75 percent complete as a circle at low tide.
Industry:Natural environment
Any of the minute hairlike structures projecting from the surface of certain types of cells.
Industry:Natural environment
In scyphozoan medusae, a fringe of short, threadlike filaments whose secretory cells secrete digestive enzymes. They are located on the floor of each gastric pouch .
Industry:Natural environment
Noise coming from sources other than the noise source being monitored.
Industry:Natural environment
Regular known rates of radiocarbon decay that are used to determine the exact ages of carbon-based life.
Industry:Natural environment
The change in the tone of a sound caused by the sound source moving away or towards the listener.
Industry:Natural environment
