气候变化领域集成服务门户(CCPortal): Predominance of abiotic drivers in the relationship between species diversity and litterfall production in a tropical karst seasonal rainforest

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DOI	10.1016/j.foreco.2019.117452
	Predominance of abiotic drivers in the relationship between species diversity and litterfall production in a tropical karst seasonal rainforest
	Guo Y.; Chen H.Y.H.; Mallik A.U.; Wang B.; Li D.; Xiang W.; Li X.
发表日期	2019
ISSN	0378-1127
卷号	449
英文摘要	Litterfall production is a major contributor to ecosystem net primary productivity and biogeochemical cycles. However, how various abiotic and biotic drivers influence litterfall production in heterogeneous natural forests is still debated. We used structural equation models (SEM) to test the direct and indirect effects of tree species diversity, tree diameter variation, stand basal area, and abiotic drivers (canopy exposure, elevation, slope, convexity, aspect, topographic wetness index and altitude above channel) on annual litterfall production in a heterogeneous tropical karst seasonal rainforest in Southern China. The SEM with tree species diversity, tree diameter variation, stand basal area, and abiotic drivers accounted for 43.4% of the variation in annual litterfall production. Tree species diversity and stand basal area had positive direct effects, while tree diameter variation had a negative direct effect on annual litterfall production. Tree species diversity had no significant effect on tree diameter variation nor stand basal area. Both annual litterfall production and tree species diversity decreased directly with water availability, while canopy exposure positively affected annual litterfall production but not tree species diversity. Our results indicate that the positive relationship between tree species diversity and litterfall production did not result from the effects of species diversity on canopy packing; instead, it appears that increasing soil water availability simultaneously reduce tree species diversity and annual litterfall production in the tropical karst seasonal rainforest. © 2019
英文关键词	Circular plot; Diversity-productivity relationship; Karst forest; Litterfall traps; Niche complementarity; Stand structural attributes
语种	英语
scopus关键词	Biodiversity; Biogeochemistry; Ecosystems; Landforms; Soil moisture; Tropics; Circular plot; Diversity-productivity relationships; Karst forest; Litterfalls; Niche complementarity; Forestry; abiotic factor; basal area; biogeochemical cycle; complementarity; forest canopy; litterfall; net primary production; rainforest; soil water; species diversity; stand structure; tropical forest; Basal Area; Biodiversity; Diameter; Ecosystems; Forestry; Production; Trees; Tropics
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155848
作者单位	Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin, 541006, China; Guangxi Youyiguan Forest Ecosystem National Research Station, Pingxiang, 532600, China; Faculty of Natural Resources Management, Lakehead University, Thunder Bay, Ontario P7B 5E1, Canada; Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China; Department of Biology, Lakehead University, Thunder Bay, Ontario P7B 5E1, Canada
推荐引用方式 GB/T 7714	Guo Y.,Chen H.Y.H.,Mallik A.U.,et al. Predominance of abiotic drivers in the relationship between species diversity and litterfall production in a tropical karst seasonal rainforest[J],2019,449.
APA	Guo Y..,Chen H.Y.H..,Mallik A.U..,Wang B..,Li D..,...&Li X..(2019).Predominance of abiotic drivers in the relationship between species diversity and litterfall production in a tropical karst seasonal rainforest.Forest Ecology and Management,449.
MLA	Guo Y.,et al."Predominance of abiotic drivers in the relationship between species diversity and litterfall production in a tropical karst seasonal rainforest".Forest Ecology and Management 449(2019).