Effects of plant intraspecific variation on the prediction of C-3/C-4 vegetation ratio from carbon isotope composition o f topsoil organic matter across grasslands

doi:10.1093/jpe/rtab022

	Effects of plant intraspecific variation on the prediction of C-3/C-4 vegetation ratio from carbon isotope composition o f topsoil organic matter across grasslands
	Luo, Wentao ; Wang, Xiaoguang 1; Auerswald, Karl 2; Wang, Zhengwen ; Bird, Michael, I 3,4; Still, Christopher J.; Lu, Xiao-Tao ; Han, Xingguo6,7
	2021
发表期刊	JOURNAL OF PLANT ECOLOGY
ISSN	1752-9921
卷号	14 期号:4 页码:628-637
摘要	Aims Understanding the patterns and drivers of carbon isotope discrimination ((13)Delta) in C-3 and C-4 functional groups is critical for predicting C-3/C-4 vegetation ratio from the isotopic composition of soil organic matter. In this study, we aimed to evaluate how intraspecific variation will modify functional group-level (13)Delta values and the associated prediction of C-3/C-4 vegetation ratio. Methods We investigated (13)Delta of 726 individual plants (96 species; C-3 and C-4 functional groups) and topsoil organic matter in 26 grassland communities along an aridity gradient in northern China. The fraction of C-4 contribution was calculated with mixing models that considered: (i) both intra- and interspecific effects on the (13)Delta values of C-3 and C-4 functional groups; (ii) only interspecific effects; or (iii) none of these effects. Important Findings We found divergent responses of plant (13)Delta at the intraspecific level to the changes of aridity across the gradient. The (13)Delta of both C-3 and C-4 functional groups was negatively correlated with an aridity index, with higher sensitivity for C-3 than for C-4 functional groups. Intraspecific (13)Delta variation played a key role in driving the total (13)Delta variations of C-3 plants. Overlooking such intraspecific effect in mixing models led to a greatly increased fraction of C-4 contribution to soil organic carbon. A correction for the effects of intraspecific variation is therefore essential for correctly inferring C-3/C-4 vegetation ratio in the past. Our findings provide basic information for the reconstruction of past vegetation change from bulk materials in arid and semiarid biomes.
关键词	arid and semiarid grasslands interspecific variation intraspecific variation soil organic matter two-member mixing models vegetation ratio
学科领域	Plant Sciences ; Ecology ; Forestry
DOI	10.1093/jpe/rtab022
收录类别	SCI
语种	英语
WOS关键词	WATER-USE EFFICIENCY ; C-4 PLANTS ; LONG-TERM ; RAINFALL GRADIENT ; FOLIAR DELTA-C-13 ; NATURAL-ABUNDANCE ; DISCRIMINATION ; PRECIPITATION ; GRASSES ; STEPPE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000668108500006
出版者	OXFORD UNIV PRESS
文献子类	Article
出版地	OXFORD
EISSN	1752-993X
资助机构	National Natural Science Foundation of China [31971465, 31822006, 31770503, 41807108] ; National Basic Research Program of China [2016YFC0500601, 2016YFC0500700] ; Youth Innovation Promotion Association CAS [201832, 2020199] ; CAS [KFZD-SW-305-002]
作者邮箱	lvxiaotao@iae.ac.cn
作品OA属性	Bronze
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/26482
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, Erguna Forest Steppe Ecotone Res Stn, Shenyang 110016, Peoples R China 2.Dalian Minzu Univ, Coll Environm & Resources, Dalian 116600, Peoples R China 3.Tech Univ Munich, Lehrstuhl Grunlandlehre, Alte Akad 12, D-85350 Freising Weihenstephan, Germany 4.James Cook Univ, Coll Sci & Engn, Cairns, Qld 4870, Australia 5.James Cook Univ, Arc Ctr Excellence Australian Biodivers & Heritag, Cairns, Qld 4870, Australia 6.Still, Christopher J.] Oregon State Univ, Dept Forest Ecosyst & Soc, Corvallis, OR USA 7.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 8.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Luo, Wentao,Wang, Xiaoguang,Auerswald, Karl,et al. Effects of plant intraspecific variation on the prediction of C-3/C-4 vegetation ratio from carbon isotope composition o f topsoil organic matter across grasslands[J]. JOURNAL OF PLANT ECOLOGY,2021,14(4):628-637.
APA	Luo, Wentao.,Wang, Xiaoguang.,Auerswald, Karl.,Wang, Zhengwen.,Bird, Michael, I.,...&Han, Xingguo.(2021).Effects of plant intraspecific variation on the prediction of C-3/C-4 vegetation ratio from carbon isotope composition o f topsoil organic matter across grasslands.JOURNAL OF PLANT ECOLOGY,14(4),628-637.
MLA	Luo, Wentao,et al."Effects of plant intraspecific variation on the prediction of C-3/C-4 vegetation ratio from carbon isotope composition o f topsoil organic matter across grasslands".JOURNAL OF PLANT ECOLOGY 14.4(2021):628-637.

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