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Ecological drivers of tree assemblage in tropical, subtropical and subalpine forests [in press]

Asefa, Mengesha; Wen, Han‐Dong; Brown, Calum; Cao, Min; Xu, Kun; Hu, Yue‐Hua

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: (1) is there a ubiquitous process shaping tree assemblage? (2) how does the relative importance of environmental and dispersal processes vary through ontogeny in different vegetation types? (3) 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 species‐area relationship and g(r) at community and species level, respectively.

Results
Homogeneous Thomas model was the model with the lowest AIC scores across ontogeny and forest types at community level. ... mehr



Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 1100-9233, 1654-1103
KITopen-ID: 1000098907
HGF-Programm 12.02.02 (POF III, LK 01)
Erschienen in Journal of vegetation science
Seiten jvs.12819
Vorab online veröffentlicht am 08.10.2019
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