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Demographic Properties Shape Tree Size Distribution in a Malaysian Rain Forest

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/58220

Title: Demographic Properties Shape Tree Size Distribution in a Malaysian Rain Forest
Authors: Kohyama, Takashi S. Browse this author →KAKEN DB
Potts, Matthew D. Browse this author
Kohyama, Tetsuo I. Browse this author
Kassim, Abd Rahman Browse this author
Ashton, Peter S. Browse this author
Keywords: Bayesian model
coexistence
community ecology
demography
equilibrium
skewness
trade-off
Issue Date: Mar-2015
Publisher: The University of Chicago Press
Journal Title: The American Naturalist
Volume: 185
Issue: 3
Start Page: 367
End Page: 379
Publisher DOI: 10.1086/679664
PMID: 25674691
Abstract: Different mechanisms have been proposed to explain how vertical and horizontal heterogeneity in light conditions enhances tree species coexistence in forest ecosystems. The foliage partitioning theory proposes that differentiation in vertical foliage distribution, caused by an interspecific variation in mortality-to-growth ratio, promotes stable coexistence. In contrast, successional niche theory posits that horizontal light heterogeneity, caused by gap dynamics, enhances species coexistence through an interspecific trade-off between growth rate and survival. To distinguish between these theories of species coexistence, we analyzed tree inventory data for 370 species from the 50-ha plot in Pasoh Forest Reserve, Malaysia. We used community-wide Bayesian models to quantify size-dependent growth rate and mortality of every species. We compared the observed size distributions and the projected distributions from size-dependent demographic rates. We found that the observed size distributions were not simply correlated with the rate of population increase but were related to demographic properties such as size growth rate and mortality. Species with low relative abundance of juveniles in size distribution showed high growth rate and low mortality at small tree sizes and low per-capita recruitment rate. Overall, our findings were in accordance with those predicted by foliage partitioning theory.
Type: article
URI: http://hdl.handle.net/2115/58220
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 甲山 隆司

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