The University of Southampton
University of Southampton Institutional Repository

Area shape and isolation of tropical forest fragments: Effects on tree species diversity and implications for conservation,

Hill, J.L. and Curran, P.J. (2003) Area shape and isolation of tropical forest fragments: Effects on tree species diversity and implications for conservation, Journal of Biogeography, 30, (9), pp. 1391-1403.

Record type: Article

Abstract

To quantify the influences of forest area, shape and isolation on tree species diversity in Ghana and to compare their significance with the influences of climate (average annual rainfall) and disturbance (fire burn, logging, agriculture).
The forest zone of southern Ghana, West Africa (between 5 and 8° N).
For twenty-two forest fragments (1) bivariate regression analyses of tree species diversity (number and composition) were employed with forest spatial geometry, climate and disturbance variables. (2) Multivariate regression analyses of tree species number and all seven environmental variables were used to determine the variability in tree species number that could be accounted for by these environmental variables.
Forest area, shape and isolation accounted for sharply decreasing proportions of variability in tree species diversity. Large forest fragments contained the greatest numbers of tree species and the highest proportions of rare tree species; irregular fragments had high proportions of regenerating, light-demanding pioneers and mature, animal-dispersed species and isolated fragments were floristically similar to less isolated fragments. Fire burn and average annual rainfall accounted for small, but nevertheless significant, proportions of variability in tree species diversity. Logging and agriculture were non-significant variables.
(1) Forest area is the most important consideration when planning tropical forest reserves. (2) Management of disturbance should take priority over management of forest shape if higher levels of tree diversity and species quality are to be maintained. (3) If new reserves are to be designated, they should be located within different climatic zones in order to capture a large fraction of the regional biota. (4) Biogeographers have an important role to play in formulating and testing hypotheses at a broad spatial scale and ultimately, informing conservation management within the tropical biome.

Full text not available from this repository.

More information

Published date: 2003
Keywords: Tropical forest, fragmentation, biodiversity, conservation, regression analysis, Ghana

Identifiers

Local EPrints ID: 14792
URI: http://eprints.soton.ac.uk/id/eprint/14792
ISSN: 0305-0270
PURE UUID: f3b60ad3-9e45-454a-b4cf-28d670541c76

Catalogue record

Date deposited: 01 Mar 2005
Last modified: 17 Jul 2017 16:52

Export record

Contributors

Author: J.L. Hill
Author: P.J. Curran

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×