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Metacommunity structure of tropical forest along an elevation gradient in Puerto Rico

Published online by Cambridge University Press:  01 September 2008

John A. Barone*
Affiliation:
Institute for Tropical Ecosystem Studies, University of Puerto Rico, P.O. Box 21910, San Juan PR 00931-1910, USA
John Thomlinson
Affiliation:
Institute for Tropical Ecosystem Studies, University of Puerto Rico, P.O. Box 21910, San Juan PR 00931-1910, USA
Pedro Anglada Cordero
Affiliation:
Institute for Tropical Ecosystem Studies, University of Puerto Rico, P.O. Box 21910, San Juan PR 00931-1910, USA
Jess K. Zimmerman
Affiliation:
Institute for Tropical Ecosystem Studies, University of Puerto Rico, P.O. Box 21910, San Juan PR 00931-1910, USA
*
1Corresponding author: John A. Barone, Department of Biology, Columbus State University, 4225 University Ave., Columbus GA 31907-5645, USA. Email: barone_john@colstate.edu

Abstract:

The development of metacommunity theory, which suggests that the diversity and composition of communities is influenced by interactions with other communities, has produced new tools for evaluating patterns of community change along environmental gradients. These techniques were used to examine how plant communities changed along elevation gradients in montane tropical forests. Two transects of 0.1-ha vegetation plots were established every 50 m in elevation in the mountains of eastern Puerto Rico. The transects ranged from 300 m to 1000 m asl and 400 m to 900 m. In each plot, all free-standing woody stems greater than 1 cm in diameter at 130 cm in height were marked, measured and identified. Additional data on three similar transects were taken from the literature. The upper or lower boundaries of species ranges were significantly clumped along all five transects. Coherence, a measure of the number of gaps in species distributions, was also significant across all transects, and three transects showed significant, albeit low, nestedness. Four sites had significant species turnover. These results suggest that metacommunity techniques can be useful in searching for patterns of community change present in montane tropical forests.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2008

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