David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Jack Alan Reynolds
Learn more about PhilPapers
Acta Biotheoretica 52 (1):41-56 (2004)
Habitat fragmentation produces isolated patches characterized by increased edge effects from an originally continuous habitat. The shapes of these patches often show a high degree of irregularity: their shapes deviate significantly from regular geometrical shapes such as rectangular and elliptical ones. In fractal theory, the geometry of patches created by a common landscape transformation process should be statistically similar, i.e. their fractal dimensions and their form factors should be equal. In this paper, we analyze 49 woodlot fragments (Pinus sylvestris L.) in the Belgian Kempen region to study the direct relationship between a transformation process and the concomitant patch geometry. Although the fractal dimension of the woodlots is scattered (i.e. they are not statistically similar), the perimeter-area relation of the fragments is characterized by a single, ‘dimension-like’ exponent. This exponent suggests a certain shape homogeneity among the patches, which is confirmed by the absence of hierarchical levels associated with sharp increases of the fractal dimension at scale transitions. The interaction of different natural (soil factor, vegetation type) and anthropogenic (afforestation, urbanization) processes during patch development is assumed to have generated this feature. Comparison of the area and perimeter fractal dimension with an ecological index for habitat quality, the interior-to-edge ratio, shows that the fractal dimension is suitable for predicting interior habitat presence, which is more likely for patches with smooth perimeters and compact areas. The ratio of the area to the perimeter fractal dimension confirms this observation, with high values for high interior-to-edge ratios, characteristic for regularly shaped patches.
|Keywords||Philosophy Philosophy of Biology Evolutionary Biology|
|Categories||categorize this paper)|
Setup an account with your affiliations in order to access resources via your University's proxy server
Configure custom proxy (use this if your affiliation does not provide a proxy)
|Through your library|
References found in this work BETA
No references found.
Citations of this work BETA
No citations found.
Similar books and articles
B. Doyon (1992). On the Existence and the Role of Chaotic Processes in the Nervous System. Acta Biotheoretica 40 (2-3):113-119.
Attila R. Imre (2006). Compactness Versus Interior-to-Edge Ratio; Two Approaches for Habitat's Ranking. Acta Biotheoretica 54 (1):21-26.
Vilis O. Nams (2006). Improving Accuracy and Precision in Estimating Fractal Dimension of Animal Movement Paths. Acta Biotheoretica 54 (1):1-11.
A. Imre (1999). Ideas in Theoretical Biology - Comment About the Fractality of the Lung. Acta Biotheoretica 47 (1):79-81.
Richard D. Campbell (1996). Describing the Shapes of Fern Leaves: A Fractal Geometrical Approach. Acta Biotheoretica 44 (2):119-142.
A. R. Imre (2001). About the Ranking of Isolated Habitats with Different Shapes: An Interior-to-Edge Ratio Study. Acta Biotheoretica 49 (2):115-120.
J. Bogaert, P. Van Hecke & I. Impens (1999). A Reference Value for the Interior-to-Edge Ratio of Isolated Habitats. Acta Biotheoretica 47 (1):67-77.
Added to index2009-01-28
Total downloads6 ( #238,483 of 1,692,590 )
Recent downloads (6 months)1 ( #181,202 of 1,692,590 )
How can I increase my downloads?