Relative contributions of biotic and abiotic factors to the spatial variation of litter stock in a mature subtropical forest

doi:10.1093/jpe/rtz018

KIB OpenIR

	Relative contributions of biotic and abiotic factors to the spatial variation of litter stock in a mature subtropical forest
	Wang,Jing; Yang,Qingsong; Qiao,Yang; Zhai,Deli; Jiang,Lifen; Liang,Guopeng; Sun,Xiaoying; Wei,Ning; Wang,Xihua; Xia,Jianyang
	2019
发表期刊	JOURNAL OF PLANT ECOLOGY
ISSN	1752-9921
卷号	12 期号:4 页码:769-780
摘要	Aims Dead plant material (i.e. litter) is the major source of soil organic matter and thus plays a fundamental role in regulating soil carbon cycling in global forest ecosystems. The storage of litter is jointly determined by its production from plants and decomposition in a given environment. However, only few studies have explored the relative importance of environmental (i.e. abiotic) and plant (i.e. biotic) factors in driving the spatial variation of litter mass. The objective of this study is to quantify the relative contributions of biotic and abiotic factors in affecting the spatial variation of aboveground litter stock in a mature subtropical forest. Methods The aboveground litter mass was sampled in 187 grids of a 20-hm forest dynamics plot in a subtropical broad-leave forest in eastern China. The contributions of environmental variables, topographical and species variables on litter stocks were quantified by the boosted regression tree analysis. Important Findings The mean aboveground litter stock was 367.5 g m(-2) in the Tiantong dynamics forest plot across all the 187 grids. The litter stock ranged from 109.2 to 831.3 g m(-2) and showed a large spatial variation with the coefficient of variance as 40.8%. The boosted regression tree analysis showed that slope elevation and soil moisture were the most influential variables on the spatial variation of litter stock. The relatively influence of abiotic factors (environmental and topographical factors) was 71.4%, which is larger than biotic factors (28.6%). Overall, these findings suggest that abiotic factors play a more important role than plants in driving the spatial variation of aboveground litter stock in the subtropical forest. Given that the global carbon-cycle models have been aiming to refine from the hundred kilometers to sub-kilometer scale, this study highlights the urgency of a better understanding of the spatial variation of litter stock on the fine scale.
DOI	10.1093/jpe/rtz018
收录类别	SCI
WOS记录号	WOS:000472807400019
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/71100
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Wang,Jing,Yang,Qingsong,Qiao,Yang,et al. Relative contributions of biotic and abiotic factors to the spatial variation of litter stock in a mature subtropical forest[J]. JOURNAL OF PLANT ECOLOGY,2019,12(4):769-780.
APA	Wang,Jing.,Yang,Qingsong.,Qiao,Yang.,Zhai,Deli.,Jiang,Lifen.,...&Xia,Jianyang.(2019).Relative contributions of biotic and abiotic factors to the spatial variation of litter stock in a mature subtropical forest.JOURNAL OF PLANT ECOLOGY,12(4),769-780.
MLA	Wang,Jing,et al."Relative contributions of biotic and abiotic factors to the spatial variation of litter stock in a mature subtropical forest".JOURNAL OF PLANT ECOLOGY 12.4(2019):769-780.

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