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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
Kazuki Miyamoto, Eizi Suzuki, Takashi Kohyama, Tatsuyuki Seino, Edi Mirmanto, Herwint Simbolon
Journal:

Journal of Tropical Ecology / Volume 19 / Issue 1 / January 2003

Published online by Cambridge University Press:

10 January 2003, pp. 43-54
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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.