S

stability

the ability of a given assemblage of organisms to withstand disturbance without a major change in the number of species or individuals

T

trophic

referring to the nutrients available to and used within a population, community, or ecosystem

U

ultraviolet radiation

radiation beyond the violet (high energy) end of the visible light spectrum. UV-B is the middle range wave-length of the three UV bands, and is largely absorbed in the Earth's atmospheric ozone layer; prolonged exposure to UV-B can be biologically damaging.

Z

zooxanthellae

symbiotic dinoflagellates in corals and other organisms



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