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Habitat differentiation among tree species with small-scale variation of humus depth and topography in a tropical heath forest of Central Kalimantan, Indonesia

Published online by Cambridge University Press:  10 January 2003

Kazuki Miyamoto ,
Eizi Suzuki ,
Takashi Kohyama ,
Tatsuyuki Seino ,
Edi Mirmanto  and
Herwint Simbolon
Kazuki Miyamoto
Affiliation:
Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan Present address: Kansai Research Center, Forestry and Forest Products Research Institute, Momoyama, Fushimi, Kyoto 612-0855, Japan. Email: mkazuki@ffpri.affrc.go.jp
Eizi Suzuki
Affiliation:
Faculty of Science, Kagoshima University, Kagoshima 890-0065, Japan
Takashi Kohyama
Affiliation:
Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan
Tatsuyuki Seino
Affiliation:
Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan Present address: Center for Ecological Research, Kyoto University, Kamitanakami, Otsu, Shiga 520-2113, Japan
Edi Mirmanto
Affiliation:
Research and Development Center for Biology, Indonesian Institute of Sciences, Bogor 16122, Indonesia
Herwint Simbolon
Affiliation:
Research and Development Center for Biology, Indonesian Institute of Sciences, Bogor 16122, Indonesia
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Abstract

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Small-scale spatial association of the distribution for 55 abundant tree species with two environmental factors (humus depth and surface microtopography) was examined in two 1-ha plots of a heath (kerangas) forest in Central Kalimantan, Indonesia. More than 80% of the 55 species showed a significant habitat preference in humus depth and/or relative elevation in at least one plot. In particular, ten species occurring in both plots showed a consistent significant preference for humus depth or relative elevation in the two plots. Using randomization tests, however, only five species significantly associated with humus depth and no species with relative elevation. These results suggest that edaphic and topographic factors, especially humus depth, contribute to determining local spatial distribution and floristic composition of abundant tree species in the forest.

Keywords

Borneohumus podzolkerangas forestspatial distributionspecies diversity
Type
Research Article
Information
Journal of Tropical Ecology , Volume 19 , Issue 1 , January 2003 , pp. 43 - 54
Copyright
2003 Cambridge University Press