NDLI: Spatial pattern formation and relative importance of intra- and interspecific competition in codominant tree species, Podocarpus nagi and Neolitsea aciculata

Content Provider	Springer Nature Link
Author	Nanami, Satoshi Kawaguchi, Hideyuki Yamakura, Takuo
Copyright Year	2010
Abstract	Spatial patterns, their changes due to mortality, and intra- and interspecific competition of two codominant tree species, Podocarpus nagi and Neolitsea aciculata, were analyzed at Mt. Mikasa, Nara City, Japan. Podocarpus nagi has a higher shade tolerance but a narrower seed dispersal range than N. aciculata. We inferred the mechanisms of spatial pattern formation and coexistence of the two species. Podocarpus nagi and N. aciculata trees were clumped and showed a spatial repulsion from each other. Patches dominated by either P. nagi or N. aciculata were formed. Podocarpus nagi trees were less clumped with increasing tree size, although no significant change in spatial patterns due to mortality was detected. A patch formation of the P. nagi population seemed to be induced by the narrow seed dispersal range. On the other hand, N. aciculata trees were more clumped and more repulsive from P. nagi trees with increasing tree size. The distribution of N. aciculata trees shifted to more clumped than expected from the random mortality over the research period. Post-dispersal mortality due to competitive exclusion by P. nagi affected the patch formation of the N. aciculata population. The relative importance of intraspecific competition to interspecific competition on the relative growth rate increased with increasing tree size. The shift corresponded to an increasing spatial repulsion between the two species. The patch formation of P. nagi population may create the spatial refuge of N. aciculata from P. nagi and may enable avoidance of interspecific competition and the coexistence of the two species.
Starting Page	37
Ending Page	46
Page Count	10
File Format	PDF
ISSN	09123814
Journal	Ecological Research
Volume Number	26
Issue Number	1
e-ISSN	14401703
Language	English
Publisher	Springer Japan
Publisher Date	2010-08-13
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Coexistence Relative growth rate Mortality Regeneration dynamics Spatial refuge Forestry Behavioural Sciences Evolutionary Biology Zoology Plant Sciences Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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