Forest fragmentation and edge influence on fire occurrence and intensity under different management types in Amazon forests
Forest fragmentation and edge influence on fire occurrence and intensity under different management types in Amazon forests
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DOI：
10.1016/j.biocon.2012.10.026
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发表时间：
2013-03-01
影响因子：
5.9
通讯作者：
Retana, Javier
中科院分区：
文献类型：
--
作者：
Armenteras, Dolors;Marisol Gonzalez, Tania;Retana, Javier
在亚马逊地区，森林边缘的生态特征已得到深入研究，但作为大规模边缘效应的火灾的发生和强度以及不同类型的管理在改变这种关系方面的作用却鲜为人知。我们使用遥感技术来研究森林破碎化，火灾和管理之间的关系，整个西北亚马逊。我们的研究是基于2005年的森林数据和中分辨率成像光谱辐射计（MODIS）的火灾数据，火灾的发生和强度的信息的基础上火灾辐射功率（FRP）数据。我们分析了50 x 50 km网格中的碎片和火灾发生和强度。我们还计算了与森林边缘相关的火灾发生在森林内部和森林边缘之外的距离。森林破碎化对火灾发生和火灾强度有显著影响，支持森林破碎化程度越高，生物质燃烧程度越高的假设。这些结果与边缘效应对火灾发生和强度的影响一致。不同类型的管理在该地区影响火灾的发生和强度，而火灾作为一个大规模的边缘效应发生独立的管理类型。最后，我们建议，应鼓励保护区和土著保护区以及外部地区的高度连通性，以尽量减少边缘驱动的火灾过程。(C)2012爱思唯尔有限公司保留所有权利。
The ecological characteristics of forest edges have been intensively studied in the Amazon region, but the occurrence and intensity of fires as large-scale edge effects are less well known, as is the role of different types of management in modifying this relationship. We used remote sensing techniques to examine the relationship between forest fragmentation, fire and management across NW Amazonia. Our study was based on forest data for 2005 and on active fire data from the MODerate-resolution imaging Spectro-radiometer (MODIS), with information on the occurrence and strength of fires based on fire radiative power (FRP) data. We analyzed the fragmentation and fire occurrence and intensity in a 50 x 50 km grid. We also calculated the distance at which edge-related fires occur in the forest interior and outside the forest edge. Forest fragmentation had a significant impact on fire occurrence and fire intensity, supporting the hypothesis that the more fragmented a forest is, the higher the degree of biomass combustion. These results are in agreement with the occurrence of an edge effect on both the occurrence and the intensity of fire. The different types of management in the region influence the occurrence and intensity of fire, whereas fire as a large-scale edge effect occurs independent of the management type. Finally, we suggest that a high connectivity in protected areas and indigenous reserves and also in outside areas should be encouraged to minimize edge-driven fire processes. (C) 2012 Elsevier Ltd. All rights reserved.