Global vegetation change through the Miocene/Pliocene boundary
Global vegetation change through the Miocene/Pliocene boundary
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DOI：
10.1038/38229
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发表时间：
1997-09-11
期刊：
影响因子：
64.8
通讯作者：
Ehleringer, JR
中科院分区：
文献类型：
--
作者：
Cerling, TE;Harris, JM;Ehleringer, JR
在800万至600万年前，亚洲、非洲、北美和南美洲化石牙釉质的碳同位素比率的变化表明，利用C-4光合作用的植物生物量在全球范围内有所增加。C-4生物量的这种突然和广泛的增加可能与大气中的二氧化碳浓度降低到有利于C-3光合作用植物的阈值有关。这种变化在低纬度地区发生得更早，因为温度越高，C-3光合作用的阈值就越高。
Between 8 and 6 million years ago, there was a global increase in the biomass of plants using C-4 photosynthesis as indicated by changes in the carbon isotope ratios of fossil tooth enamel in Asia, Africa, North America and South America. This abrupt and widespread increase in C-4 biomass may be related to a decrease in atmospheric CO2 concentrations below a threshold that favoured C-3-photosynthesizing plants. The change occurred earlier at lower latitudes, as the threshold for C-3 photosynthesis is higher at warmer temperatures.