| 单词 |
isocline |
| 释义 |
isocline Geol.|ˈaɪsəʊklaɪn|
[f. Gr. ἰσοκλινή-ς: see isoclinal a. and n. Cf. F. isocline adj., isoclinal: cf. anticline, syncline.]
An isoclinal fold of a stratum or series of strata.
1890in Cent. Dict.
Add:2. a. Surveying. A line (imaginary or on a map) connecting points of equal gradient. rare.
1963Monkhouse & Wilkinson Maps & Diagrams (ed. 2) ii. 118 He [sc. F. Moseley] first plotted all the calculated degrees of slope, and interpolated isopleths of equal slope (isoclines) at degree intervals.
b. Biol. Any line joining points where the rate of change of some variable has a fixed value; spec. a line joining points of zero population growth.
1963Amer. Naturalist XCVII. 210 Let us also connect the points at which the predator population just maintained itself and call this the predator isocline. 1974Nature 3 May 12/2 Zero isoclines, which depict the separation point between positive and negative population growth, were constructed from continuous populations, maintained by serial transfer. 1987Theoret. Population Biol. XXXII. 283 Consumer growth isoclines should not be classified using the same terms used to describe nutrition isoclines.., whose axes are amounts consumed of the different resources. |
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