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Measurement and management of human-induced patterns of forest fragmentation

Tole, L.A. (2006) Measurement and management of human-induced patterns of forest fragmentation. Environmental Management, 37 (6). pp. 788-801. ISSN 0364-152X

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In many tropical developing countries, the twin pressures of population and poverty are resulting in substantial fragmentation of forests, increasing the probability of extinction for many species, Forest fragmentation occurs when large contiguous forests are perforated by small holes or broken up into edges and smaller patches to form a nonforested matrix of open spaces. Thus, forest fragmentation refers not only to the area of forest cleared, but also to the pattern of this clearance, the resulting forest's spatial properties. Both characteristics are important for species survivability. Apart from opening up forests to many abiotic and biotic influences, fragmentation can affect species dispersal and migration through its effects on forest connectivity. Landscape ecology conceptualizes connectivity as a gradient of critical thresholds, ranging from the large intact forest to the small unconnected forest patch. This article reports results from a multiple-scale analysis of forest fragmentation in Jamaica's Cockpit Country, an area of once contiguous forest now under threat from human encroachment. Spatial forest data derived from classification of ETM+ satellite imagery are used to measure fragmentation patterns representing various degrees of forest connectivity and density. The results suggest that, overall, 81% of the region is in forest. However, fragmentation patterns also suggest that this forest is riven with extensive perforations indicative of an early stage in the decline of contiguity. The results provided by the spatial fragmentation model are a first step in the design of effective conservation and rehabilitation plans for the area. The article concludes with a discussion of possible multiscale management options for the region.

Item type: Article
ID code: 3898
Keywords: forest fragmentation, environmental management, environmental economics, Economic Theory, Environmental Sciences, Ecology, Global and Planetary Change, Pollution
Subjects: Social Sciences > Economic Theory
Geography. Anthropology. Recreation > Environmental Sciences
Department: Strathclyde Business School > Economics
Depositing user: Strathprints Administrator
Date Deposited: 23 Aug 2007
Last modified: 10 Dec 2015 16:43

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