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17 April 2024 |
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Impact of lower atmospheric carbon dioxide on tropical mountain ecosystems | | F A Street-Perrott
; Y Huang
; R A Perrott
; G Eglinton
; P Barker
; L B Khelifa
; D D Harkness
; D O Olago
; | | Date: |
21 Nov 1997 | | Journal: | Science, 278 (5342), 1422-6 | | 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 CO2-concentrating mechanisms, including C4 grasses and freshwater algae, were primarily responsible for this large increase. Carbon limitation due to lower ambient CO2 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. | | Source: | PubMed, pmid9367947 | | Services: | Forum | Review | Favorites | |
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