| 释义 |
euphotic, a.|juːˈfəʊtɪk|
[f. eu- + photic a. b.]
Pertaining to or designating the upper layer of the photic zone in sea-water where sufficient light penetrates to permit photosynthesis.
1909Groom & Balfour tr. Warming's Oecol. Plants iv. xxxvi. 150 Euphotic vegetation, which receives an abundance of light. 1959New Scientist 1 Oct. 586/1 Only a relatively thin surface layer of the ocean, the ‘euphotic layer’, is illuminated, and so only in this layer can photosynthesis and primary production of organic matter take place. 1964Oceanogr. & Marine Biol. II. 360 The observation at 70m represents the luminescent activity of euphotic zone inhabitants plus that of scattering layer organisms. 1970Nature 25 July 375/1 The flux of organic carbon from the euphotic zone (0–100 m) into the deep sea and into the bottom sediments. |