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 |
DOI | 10.1016/j.jaridenv.2011.04.025 |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000293427500001 |
引用统计 | |
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 |
第一作者单位 | 中国科学院海洋研究所 |
推荐引用方式 GB/T 7714 | 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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