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Dynamics of Forest Fragmentation and Connectivity Using Particle and Fractal Analysis

机译:基于粒子和分形分析的森林破碎化和连通性动力学

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摘要

The ever decreasing area of forests has lead to environmental and economical challenges and has brought with it a renewed interest in developing methodologies that quantify the extent of deforestation and reforestation. In this study we analyzed the deforested areas of the Apuseni Mountains, which has been under economic pressure in recent years and resulted in widespread deforestation as a means of income. Deforested surface dynamics modeling was based on images contained in the Global Forest Database, provided by the Department of Geographical Sciences at Maryland University between 2000 and 2014. The results of the image particle analysis and modelling were based on Total Area (ha), Count of patches and Average Size whereas deforested area distribution was based on the Local Connected Fractal Dimension, Fractal Fragmentation Index and Tug-of-War Lacunarity as indicators of forest fragmentation or heterogeneity. The major findings of the study indicated a reduction of the tree cover area by 3.8%, an increase in fragmentation of 17.7% and an increase in heterogeneity by 29%, while fractal connectivity decreased only by 0.1%. The fractal and particle analysis showed a clustering of forest loss areas with an average increase from 1.1 to 3.0 ha per loss site per year. In conclusion, the fractal and particle analysis provide a relevant methodological framework to further our understanding of the spatial effects of economic pressure on forestry.
机译:森林面积的不断减少导致了环境和经济方面的挑战,并带来了对开发量化毁林和再造林程度的方法学的新兴趣。在这项研究中,我们分析了Apuseni山区的森林砍伐地区,该地区近年来一直承受着经济压力,并导致广泛的森林砍伐作为一种收入手段。森林砍伐的表面动力学建模是基于2000年至2014年由马里兰大学地理科学系提供的全球森林数据库中包含的图像。图像颗粒分析和建模的结果基于总面积(ha),斑块和平均大小,而森林砍伐面积分布则基于局部连通分形维数,分形破碎指数和战争拔河裂隙作为森林破碎或异质性的指标。该研究的主要发现表明,树木覆盖面积减少了3.8%,碎片增加了17.7%,异质性增加了29%,而分形连通性仅减少了0.1%。分形和粒子分析表明,森林流失面积呈簇状分布,每个损失地点每年平均从1.1公顷增加到3.0公顷。总之,分形和粒子分析为进一步了解经济压力对林业的空间效应提供了相关的方法框架。

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