Integrity and isolation of Costa Rica's national parks and biological reserves:: examining the dynamics of land-cover change
Integrity and isolation of Costa Rica's national parks and biological reserves:: examining the dynamics of land-cover change
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DOI：
10.1016/s0006-3207(02)00145-3
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发表时间：
2003-01-01
影响因子：
5.9
通讯作者：
Busch, C
中科院分区：
文献类型：
--
作者：
S치nchez-Azofeifa, GA;Daily, GC;Busch, C
热带森林的转变和退化被认为是全世界生物多样性丧失的主要驱动力。发展中国家正试图通过建立国家公园和生物保护区来应对这种生物多样性的大规模丧失。哥斯达黎加也不例外。自1970年代初以来，哥斯达黎加的国家发展战略包括建立几个国家公园和生物保护区。这导致监测这些保护区的完整性和相互作用。关键问题包括：“这些地区的边界是否得到尊重？”;“他们是否建立了一个有效的网络？它们是否有效的保育工具？".本文量化了1960年至1997年保护区内和保护区周围的森林砍伐和次生生长趋势。我们发现，在国家公园和生物保护区内，森林砍伐率可以忽略不计。对于国家公园和生物保护区以外的地区，我们报告说，这些保护区周围的1公里缓冲区。1987/1997年期间有一个森林净收益。因此，在这一点上，保护区的边界似乎得到了尊重。然而.在10公里的缓冲区，我们发现显着的森林损失的所有研究期间，这表明，越来越孤立的保护区可能会阻止他们作为一个有效的网络功能。(C)2002爱思唯尔科技有限公司。保留所有权利。
The transformation and degradation of tropical forest is thought to be the primary driving force in the loss of biodiversity worldwide. Developing countries are trying to counter act this massive lost of biodiversity by implementing national parks and biological reserves. Costa Rica is no exception to this rule. National development strategies in Costa Rica, since the early 1970s, have involved the creation of several National Parks and Biological Reserves. This has led to monitoring the integrity of and interactions between these protected areas. Key questions include: "Are these areas' boundaries respected?"; "Do they create a functioning network?"; and "Are they effective conservation tools?". This paper quantifies deforestation and secondary growth trends within and around protected areas between 1960 and 1997. We find that inside of national parks and biological reserves, deforestation rates were negligible. For areas outside of National Parks and Biological reserves we report that for 1-km buffer zones around such protected areas. there is a net forest gain for the 1987/1997 time period. Thus, it appears that to this point the boundaries of protected areas are respected. However. in the 10-km buffer zones we find significant forest loss for all study periods, This suggests that increasing isolation of protected areas may prevent them from functioning as an effective network. (C) 2002 Elsevier Science Ltd. All rights reserved.