IOCAS-IR  > 海洋地质与环境重点实验室
Spatial and temporal variations in C-3 and C-4 plant abundance over the Chinese Loess Plateau since the last glacial maximum
Yao, Z.1,2; Wu, H.3; Liang, M.4; Shi, X.1
2011-10-01
发表期刊JOURNAL OF ARID ENVIRONMENTS
卷号75期号:10页码:881-889
文章类型Review
摘要Stable carbon isotopes of soil organic matter from 12 sites in the southern Chinese Loess Plateau are reviewed to examine spatial and temporal patterns of C-3 and C-4 plants in the arid to semiarid monsoonal region during three key periods - last glacial maximum, mid-Holocene, and modern. We have tentatively corrected the effects of atmospheric CO2 concentrations and precipitation amounts on the delta C-13 endmembers for C-3 plants to reconstruct the relative proportion of C-4 plants because the delta C-13 values of C-3 plants are variable under different CO2 and climate conditions. The results indicate that C-4 grasses increase from northwest to southeast spatially, which is consistent with present-day increasing precipitation and temperature patterns. This suggests that for a monsoon-dominant arid to semiarid region, such as the Loess Plateau, warm-season rainfall is a primary factor limiting C-4 plants growth, and thus C-4 grasses have been outcompeted by C-3 grasses/shrubs under cold-dry climate conditions. However, temporal fluctuations in atmospheric CO2 concentration may also affect plant growth through altering water-use efficiency (WUE). Enhanced drought caused by decreased WUE due to low atmospheric CO2 concentrations during glacial periods, combined with a cold-dry climate, leads to a decline in C-4 grasses, canceling out any advantages gained from lowered atmospheric CO2 concentrations. To reconstruct accurately the abundance of C-3 and C-4 plants in an ecosystem and explore their controlling factors, process-based vegetation models integrating CO2 and climatic parameters interactive with plant physiology are necessary. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
关键词Monsoon Vegetation Semiarid Region Stable Carbon Isotope
DOI10.1016/j.jaridenv.2011.04.025
收录类别SCI
语种英语
WOS记录号WOS:000293427500001
引用统计
被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/32939
专题海洋地质与环境重点实验室
作者单位1.State Ocean Adm, Key Lab Marine Sedimentol & Environm Geol, Inst Oceanog 1, Qingdao 266061, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
4.China Univ Geosci, Fac Earth Sci, Minist Educ, Three Gorges Res Ctr Geohazard, Wuhan 430074, Peoples R China
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Yao, Z.,Wu, H.,Liang, M.,et al. Spatial and temporal variations in C-3 and C-4 plant abundance over the Chinese Loess Plateau since the last glacial maximum[J]. JOURNAL OF ARID ENVIRONMENTS,2011,75(10):881-889.
APA Yao, Z.,Wu, H.,Liang, M.,&Shi, X..(2011).Spatial and temporal variations in C-3 and C-4 plant abundance over the Chinese Loess Plateau since the last glacial maximum.JOURNAL OF ARID ENVIRONMENTS,75(10),881-889.
MLA Yao, Z.,et al."Spatial and temporal variations in C-3 and C-4 plant abundance over the Chinese Loess Plateau since the last glacial maximum".JOURNAL OF ARID ENVIRONMENTS 75.10(2011):881-889.
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