Species-Habitat Associations in a Sri Lankan Dipterocarp Forest

Forest structure and species distribution patterns were examined among eight topographically defined habitats for the 205 species with stems ϵ 1 cm dbh inhabiting a 25-ha plot in the Sinharaja rain forest, Sri Lanka. The habitats were steep spurs, less-steep spurs, steep gullies and less-steep gulli...

Ausführliche Beschreibung

Bibliographische Detailangaben
Veröffentlicht in:	Journal of Tropical Ecology. - Cambridge University Press, 1985. - 22(2006), 4, Seite 371-384
1. Verfasser:	Gunatilleke, C. V. S. (VerfasserIn)
Weitere Verfasser:	Harms, K. E., Ashton, P. M. S., Ashton, P. S.
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2006
Zugriff auf das übergeordnete Werk:	Journal of Tropical Ecology
Schlagworte:	Environmental Heterogeneity Habitat Specialization Rain Forest Sinharaja Forest Dynamics Plot Species-Habitat Associations Sri Lanka Torus Translations Biological sciences Physical sciences


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100	1		\|a Gunatilleke, C. V. S. \|e verfasserin \|4 aut
245	1	0	\|a Species-Habitat Associations in a Sri Lankan Dipterocarp Forest
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520			\|a Forest structure and species distribution patterns were examined among eight topographically defined habitats for the 205 species with stems ϵ 1 cm dbh inhabiting a 25-ha plot in the Sinharaja rain forest, Sri Lanka. The habitats were steep spurs, less-steep spurs, steep gullies and less-steep gullies, all at either lower or upper elevations. Mean stem density was significantly greater on the upper spurs than in the lower, less-steep gullies. Stem density was also higher on spurs than in gullies within each elevation category and in each upper-elevation habitat than in its corresponding lower-elevation habitat. Basal area varied less among habitats, but followed similar trends to stem density. Species richness and Fisher's alpha were lower in the upper-elevation habitats than in the lower-elevation habitats. These differences appeared to be related to the abundances of the dominant species. Of the 125 species subjected to torus-translation tests, 99 species (abundant and less abundant and those in different strata) showed at least one positive or negative association to one or more of the habitats. Species associations were relatively more frequent with the lower-elevation gullies. These and the previous findings on seedling ecophysiology, morphology and anatomy of some of the habitat specialists suggest that edaphic and hydrological variation related to topography, accompanied by canopy disturbances of varying intensity, type and extent along the catenal landscape, plays a major role in habitat partitioning in this forest.
540			\|a Copyright 2006 Cambridge University Press
650		4	\|a Environmental Heterogeneity
650		4	\|a Habitat Specialization
650		4	\|a Rain Forest
650		4	\|a Sinharaja Forest Dynamics Plot
650		4	\|a Species-Habitat Associations
650		4	\|a Sri Lanka
650		4	\|a Torus Translations
650		4	\|a Biological sciences \|x Biology \|x Botany \|x Plant ecology \|x Forest ecology \|x Forest ecosystems \|x Forest habitats
650		4	\|a Biological sciences \|x Biology \|x Botany \|x Plant ecology \|x Forest ecology
650		4	\|a Biological sciences \|x Ecology \|x Population ecology \|x Synecology \|x Habitats
650		4	\|a Biological sciences \|x Ecology \|x Population ecology \|x Synecology \|x Biocenosis \|x Plant communities \|x Forests \|x Rain forests \|x Tropical rain forests
650		4	\|a Biological sciences \|x Ecology \|x Wildlife ecology \|x Wildlife habitats
650		4	\|a Physical sciences \|x Earth sciences \|x Geography \|x Geomorphology \|x Topography \|x Topographical elevation
650		4	\|a Biological sciences \|x Biology \|x Botany \|x Dendrology \|x Trees
650		4	\|a Biological sciences \|x Ecology \|x Population ecology \|x Synecology \|x Biocenosis \|x Plant communities \|x Forests \|x Tropical forests
650		4	\|a Biological sciences \|x Biology \|x Biological taxonomies \|x Species
650		4	\|a Biological sciences \|x Biology \|x Botany \|x Plant ecology \|x Vegetation \|x Vegetation structure \|x Plant strata \|x Vegetation canopies \|x Forest canopy
655		4	\|a research-article
700	1		\|a Harms, K. E. \|e verfasserin \|4 aut
700	1		\|a Ashton, P. M. S. \|e verfasserin \|4 aut
700	1		\|a Ashton, P. S. \|e verfasserin \|4 aut
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773	1	8	\|g volume:22 \|g year:2006 \|g number:4 \|g pages:371-384
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