气候变化领域集成服务门户(CCPortal): Conspecific and heterospecific crowding facilitate tree survival in a tropical karst seasonal rainforest

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DOI	10.1016/j.foreco.2020.118751
	Conspecific and heterospecific crowding facilitate tree survival in a tropical karst seasonal rainforest
	Guo Y.; Chen H.Y.H.; Wang B.; Xiang W.; Li D.; Li X.; Mallik A.U.; Ding T.; Huang F.; Lu S.; Wen S.
发表日期	2020
ISSN	0378-1127
英文摘要	Tree mortality plays a vital role in forest dynamics and contributes to species coexistence and community assembly. However, the mechanisms that control tree mortality are poorly understood, particularly in species-rich tropical forests. Size-dependent abiotic constraints and biotic interactions act simultaneously to cause tree mortality in natural forests. However, these drivers are often studied independently, which can limit our understanding of how they interact to affect tree mortality in natural forests. We employed a hierarchical Bayesian logistic regression modeling approach to quantify the simultaneous effects of tree size, topography, neighborhoods, and their interactions on tree mortality in a 15-ha fully mapped tropical karst seasonal rainforest in Southern China. Of the variables tested, tree size exhibited the most consistent and strongest negative effect on tree mortality, while topography and neighborhood competition were of secondary importance. Neighbors, particularly heterospecific neighbors, had a facilitative effect on lowering mortality, while only several species showed conspecific negative density dependent on mortality. The topographical wetness index had a significant positive effect on tree mortality. Size-dependent and neighborhood competition-induced tree mortality was stronger for shade-intolerant than for shade-tolerant species, and the size-dependent mortality was the strongest for shrub species among the three growth forms. Our results indicated that the size-dependent effect was the dominant cause of tree mortality; however, neighbors, particularly heterospecific neighbors, had a facilitative effect on lowering tree mortality. Furthermore, the relative importance of these mechanisms for tree mortality differed within life-history strategies guilds. Our study highlighted the value of simultaneously considering the individual and interactive effects of multiple mechanisms toward understanding the dynamics and coexistence of highly diverse metacommunities in harsh environments. © 2020 Elsevier B.V.
英文关键词	Competition; Facilitation; Karst forest; Life-history strategies; Negative density dependence; Plant-plant interaction; Size-dependent mortality
语种	英语
scopus关键词	Logistic regression; Silicon; Topography; Tropics; Biotic interactions; Community assembly; Hierarchical bayesian; Interactive effect; Life history strategy; Logistic Regression modeling; Simultaneous effects; Size-dependent effect; Forestry
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/155656
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, ON P7B5E1, 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, ON P7B5E1, Canada
推荐引用方式 GB/T 7714	Guo Y.,Chen H.Y.H.,Wang B.,et al. Conspecific and heterospecific crowding facilitate tree survival in a tropical karst seasonal rainforest[J],2020.
APA	Guo Y..,Chen H.Y.H..,Wang B..,Xiang W..,Li D..,...&Wen S..(2020).Conspecific and heterospecific crowding facilitate tree survival in a tropical karst seasonal rainforest.Forest Ecology and Management.
MLA	Guo Y.,et al."Conspecific and heterospecific crowding facilitate tree survival in a tropical karst seasonal rainforest".Forest Ecology and Management (2020).