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Elevational and latitudinal changes in tree associations and diversity in the Eastern Arc mountains of Tanzania

Lovett, J.C. (1996) Elevational and latitudinal changes in tree associations and diversity in the Eastern Arc mountains of Tanzania. Journal of Tropical Ecology. pp. 629-650. ISSN 1469-7831

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Abstract

A total of 200 variable-area plots covering 20 3 ha containing 4000 trees with a basal area of 921 4 m2 were assessed over a combined elevational range of 410-2180 m in the moist forests of three Tanzanian Eastern Arc mountains: West Usambara, Nguru and Udzungwa. Plot data were ordinated on the basis of species presence/absence, frequency and basal area Axis 1 of ordinations based on species presence/absence are correlated with elevation Axis 1 of the frequency-weighted ordination was correlated with elevation in the Nguru and Udzungwa mountains, but plots from the West Usambara showed a rainfall-related discontinuity Axis 1 of the West Usambara basal area-weighted ordination showed evidence of long-term dynamics of Ocotea usambarensis and in the Udzungwa mountains was determined by presence of Parinari excelsa Plot diversity was not correlated with elevation or latitude, but was lower in disturbed, low rainfall or more seasonal forest. Stem density was positively correlated with elevation and was greater on ridge tops than valley sides and valley bottoms

Item Type: Article
Copyright, Publisher and Additional Information: © 1996 Cambridge University Press. Reproduced in accordance with the publisher's self-archiving policy.
Keywords: diversity, elevational variation, ordination, structure, tropical forest, Tanzania
Academic Units: The University of York > Environment (York)
Depositing User: Repository Officer
Date Deposited: 06 Sep 2006
Last Modified: 17 Oct 2013 14:42
Status: Published
Refereed: Yes
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/1546

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