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  1.  23
    A Reference Value for the Interior-to-Edge Ratio of Isolated Habitats.J. Bogaert, P. Van Hecke & I. Impens - 1999 - Acta Biotheoretica 47 (1):67-77.
    Isolated habitats, the consequence of the fragmentation process, are the object of external disturbance. This divides the patch area into two zones: interior and edge. The interior-to-edge ratio quantifies the potential disturbance impact. A method is presented to calculate a reference value for the interior-to-edge ratio, based upon the minimum edge for a given interior. The method is based on pixel geometry features and mathematical morphology. A corrected interior-to-edge ratio is defined using the reference value. The method is illustrated for (...)
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  2.  19
    Land-Cover Change: Quantification Metrics for Perforation Using 2-D Gap Features.J. Bogaert, D. Salvador-Van Eysenrode, P. Van Hecke, I. Impens & R. Ceulemans - 2001 - Acta Biotheoretica 49 (3):161-169.
    Perforation or gap formation in a vegetation is a major process in landscape transformation. The occurrence of gaps profoundly alters the microclimatical conditions in a vegetation. A method is proposed to quantify perforation by using the three main 2-D characteristics of the gaps: area, number and boundary length. New measures are developed by normalizing the observed values to the reference status of minimum and maximum perforation. As minimum perforation status, the presence of one single gap with area equal to the (...)
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  3.  23
    Towards a Quantification of Ecological Theory: The Importance of Multivariate Analysis and of an Accurate Diversity Measurement.J. Bogaert, R. Ceulemans, I. Impens & I. Nijs - 2002 - Acta Biotheoretica 50 (1):57-61.