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(Article of periodic en Anglais - 1980)

Document title

An altitudinal cline in tropical African grass floras and its paleoecological significance

Authors(s) and Affiliation(s)

LIVINGSTONE D. A. ; CLAYTON W. D. ;

Abstract

At altitudes below 1300 m most species of grasses in tropical Africa are ones that use 4-carbon photosynthesis. Above 4000 m only species of the subfamily Pooideae using 3-carbon photosynthesis are found. At intermediate altitudes the percent of 3-carbon genera and species in the grass flora is a very regular function of altitude. The correlate of altitude that controls the distribution of grasses appears to be temperature. Fossil grass cuticles are identifiable to genus and should provide a useful palcothermometer. If no other errors were involved, the regular altitudinal distribution of genera in the flora of tropical East Africa would permit paleotemperature estimates with 95% confidence limits of 1.2C.

Source

Article of periodic

published at : Quaternary research New York

Editor :

Millesime : 1980, vol. 13, no3 [pp. 392-402]

Bibliographic references : 29 réf.

Language

Anglais

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