Fractal Stability Applied to Forestry Patches

Author:

Nascimento Antonio Teófilo Ataide do1,Santos Stefanie Chaves dos1,de Matos Mara Rojane Barros1,Orge Maria Dolores Ribeiro1

Affiliation:

1. Universidade do Estado da Bahia

Abstract

Abstract Context: The fractal analysis has been used by landscape ecologists as a shape metric in order to quantify the complexity of landscape patches. However the use of fractal geometry in ecology possesses an unexplored potential. We then developed a broader study of shapes with unitary fractal dimension. Objectives: Our aim is to amplify the use of fractal dimensions as a metric of shape in the analysis and discovery of forestry landscape patches with unitary fractal dimension. Furthermore, we develop a method for monitoring and recovery of forestry patches. Methods: We establish a method of expansion in order to obtain patches with a good perimeter-area ratio, i. e., unitary fractal dimension. In order to do that, to each landscape patch we associate a polygon and, to each side, we define a locus that expands the polygon so that its fractal dimension is equal to one. Results: This study reveals a range of patches’ shapes with unitary fractal dimension. Inspired by the proposed method's recursion we denote them as fractally stable polygons. To each side of the polygon we set a condition of expansion possibility. The locus of expansion was also defined. Additionally, we define a test of global expansion. Conclusions: Through the developed method it is possible to ascertain when the perimeter-area ratio of a landscape patch is compromised. To expandable sides, the method provides the locus of recovery of the perimeter-area ratio. This enables a wider applicability in the analysis of forestry fragmentation through fractal dimension.

Publisher

Research Square Platform LLC

Reference19 articles.

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2. Laurent Seuront (2010) Fractals and multifractals in ecology and aquatic science. Taylor and Francis Group, LLC

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4. George Sugihara and Robert M. May (1990) Applications of fractals in ecology. Trends in Ecology & Evolution 5(3): 79-86 https://doi.org/https://doi.org/10.1016/0169-5347(90)90235-6, Fractal models describe the geometry of a wide variety of natural objects such as coastlines, island chains, coral reefs, satellite ocean-color images and patches of vegetation. Cast in the form of modified diffusion models, they can mimic natural and artificial landscapes having different types of complexity of shape. This article provides a brief introduction to fractals and reports on how they can be used by ecologists to answer a variety of basic questions, about scale, measurement and hierarchy in, ecological systems., 0169-5347

5. Halley, J. M. and Hartley, S. and Kallimanis, A. S. and Kunin, W. E. and Lennon, J. J. and Sgardelis, S. P. (2004) Uses and abuses of fractal methodology in ecology. Ecology Letters 7(3): 254-271 https://doi.org/https://doi.org/10.1111/j.1461-0248.2004.00568.x, Abstract Fractals have found widespread application in a range of scientific fields, including ecology. This rapid growth has produced substantial new insights, but has also spawned confusion and a host of methodological problems. In this paper, we review the value of fractal methods, in particular for applications to spatial ecology, and outline potential pitfalls. Methods for measuring fractals in nature and generating fractal patterns for use in modelling are surveyed. We stress the limitations and the strengths of fractal models. Strictly speaking, no ecological pattern can be truly fractal, but fractal methods may nonetheless provide the most efficient tool available for describing and predicting ecological patterns at multiple scales.

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