| 单词 |
picoplankton |
| 释义 |
picoplankton, n. Biol.|ˈpiːkəʊˌplæŋktən|
[f. pico- + plankton n.]
Plankton consisting of organisms between 0.2 and 2.0 microns in diameter; also used with reference to organisms with a wet weight of the order of 10-12 g.
1978J. McN. Sieburth et al. in Limnol. & Oceanogr. XXIII. 1261/1 The size fractions occupied by the bacterioplankton (0.2–2.0 µm) and virioplankton (0.02–0.2 µm) have been termed picoplankton and femtoplankton. The basis for this is the fortunate naming of the two larger size fractions in the nanoplankton and microplankton... This is all the more applicable if the plankton organisms are regarded on the basis of volume (three-dimensional) rather than length (one-dimensional) and are assumed to have a cubic shape and a density of 1 g.cm-3. 1980Marine Biol. LVIII. 216/1 Production rates of photosynthetic picoplankton are not known in these (or other) areas but Fay..has shown that autotrophs smaller than 10 µm may be responsible for more than 60{pcnt} of the primary production in Antarctic waters. 1983Sci. Amer. June 62/2 The intent was to trap picoplankton: organisms whose wet weight is on the order of a picogram, or 10-12 gram. 1988Jrnl. Phycol. XXIV. 423/2 The metazooplankton were unable to graze the smaller cells in the picoplankton which normally are grazed by protozooplankton.
Hence ˌpicoplankˈtonic a., of, pertaining to, or designating picoplankton.
1982Marine Biol. LXVII. 68/1 Our previous assumption..that a 3 µm filter effectively separated phytoplankton and bacteria was evidently due to our failure to detect the picoplanktonic algal forms. 1988Jrnl. Phycol. XXIV. 416/1 An unprecedented aestival bloom of a picoplanktonic alga that occurred in Narragansett Bay, Rhode Island, during 1985 was accompanied by..catastrophic mortality of the blue mussel, Mytilus edulis. L. |
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