Impact of Lower Atmospheric Carbon Dioxide on Tropical Mountain Ecosystems-Reference-Cited by-同舟云学术

Impact of Lower Atmospheric Carbon Dioxide on Tropical Mountain Ecosystems

Published:1997-11-21 Issue:5342 Volume:278 Page:1422-1426
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Street-Perrott F. Alayne¹,Huang Yongsong¹,Perrott R. Alan¹,Eglinton Geoffrey¹,Barker Philip¹,Khelifa Leila Ben¹,Harkness Douglas D.¹,Olago Daniel O.¹

Affiliation:

1. F. A. Street-Perrott and R. A. Perrott are in the Tropical Palaeoenvironments Research Group, Department of Geography, University of Wales Swansea, Swansea SA2 8PP, UK. Y. Huang and G. Eglinton are at the Biogeochemistry Research Centre, Department of Geology, University of Bristol, Bristol BS8 1RJ, UK. P. Barker is at the Hydrodynamics and Sedimentology Laboratory, Department of Geography, Lancaster University, Lancaster LA1 4YB, UK. L. Ben Khelifa and D. O. Olago are at the School of Geography,...

Abstract

Carbon-isotope values of bulk organic matter from high-altitude lakes on Mount Kenya and Mount Elgon, East Africa, were 10 to 14 per mil higher during glacial times than they are today. Compound-specific isotope analyses of leaf waxes and algal biomarkers show that organisms possessing CO 2 -concentrating mechanisms, including C 4 grasses and freshwater algae, were primarily responsible for this large increase. Carbon limitation due to lower ambient CO 2 partial pressures had a significant impact on the distribution of forest on the tropical mountains, in addition to climate. Hence, tree line elevation should not be used to infer palaeotemperatures.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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