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Ecological drivers of tree assemblage in tropical, subtropical and subalpine forests
Asefa, Mengesha1; Wen, Han-Dong; Brown, Calum2; Cao, Min; Xu, Kun3; Hu, Yue-Hua
2020
Source PublicationJOURNAL OF VEGETATION SCIENCE
ISSN1100-9233
IssuexPages:x
Abstract

Aims It is widely accepted that deterministic and neutral dispersal processes are two of the principal mechanisms driving community assembly. However, the relative importance of these ecological drivers between distinct life stages both at community and individual species levels remains poorly understood in different vegetation types. Here, we address the following questions: (a) is there a ubiquitous process shaping tree assemblage; (b) how does the relative importance of environmental and dispersal processes vary through ontogeny in different vegetation types; and (c) will the spatial patterns of trees at community and individual species levels reflect similar contribution between ecological processes? Location Yunnan province, southwest China. Methods We used the Homogeneous Poisson, Homogeneous Thomas, Inhomogeneous Poisson, and Inhomogeneous Thomas point process models to predict the effect of stochastic, dispersal and/or environmental processes, respectively, on the distribution of trees across ontogeny in tropical, subtropical and subalpine forests. To evaluate the relative importance of models, we compared the observed and simulated patterns of the species-area relationship and the pair correlation function g(r) at community and species level, respectively. Results The Homogeneous Thomas model was the model with the lowest Akaike information criterion (AIC) scores across ontogeny and forest types at community level. At the species level, however, Homogeneous Thomas, and Inhomogeneous Thomas predicted the distribution of large and small trees, respectively, with lower AIC values in two of our three plots. In the third plot, the Homogeneous Thomas model is dominant across ontogeny at the species level. Conclusions Tree communities are assembled mainly by the dispersal process at community level. The relative importance of ecological processes for species distribution varies across life stages at the species level, suggesting that there is an ontogenetic shift of ecological processes in shaping tree distribution. Using different summary statistics at both community and species levels helps to discern the different spatial structures of species and increases our appreciation of the processes underpinning community assembly.

Keywordcommunity assembly dispersal process ecological drivers environment life stages subalpine forest subtropical forest summary statistics tropical forest
Subject AreaPlant Sciences ; Environmental Sciences & Ecology ; Forestry
DOI10.1111/jvs.12819
Indexed BySCI
Language英语
WOS IDWOS:000497745200001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/11547
Collection森林生态研究组
Affiliation1.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Forest Ecol, Mengla 666303, Yunnan, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Karlsruhe Inst Technol, Inst Meteorol & Climate Res, Atmospher Environm Res IMK IFU, Garmisch Partenkirchen, Germany
4.Chinese Acad Sci, Kunming Inst Bot, Lijiang Forest Ecosyst Res Stn, Lijiang, Peoples R China
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GB/T 7714
Asefa, Mengesha,Wen, Han-Dong,Brown, Calum,et al. Ecological drivers of tree assemblage in tropical, subtropical and subalpine forests[J]. JOURNAL OF VEGETATION SCIENCE,2020(x):x.
APA Asefa, Mengesha,Wen, Han-Dong,Brown, Calum,Cao, Min,Xu, Kun,&Hu, Yue-Hua.(2020).Ecological drivers of tree assemblage in tropical, subtropical and subalpine forests.JOURNAL OF VEGETATION SCIENCE(x),x.
MLA Asefa, Mengesha,et al."Ecological drivers of tree assemblage in tropical, subtropical and subalpine forests".JOURNAL OF VEGETATION SCIENCE .x(2020):x.
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