Degraded lands worth protecting: the biological importance of Southeast Asia's repeatedly logged forests
Degraded lands worth protecting: the biological importance of Southeast Asia's repeatedly logged forests
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DOI：
10.1098/rspb.2010.1062
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发表时间：
2011-01-07
影响因子：
4.7
通讯作者：
Wilcove, David S.
中科院分区：
文献类型：
--
作者：
Edwards, David P.;Larsen, Trond H.;Wilcove, David S.
东南亚是生物多样性受到威胁的热点地区，这是因为大量砍伐和森林转向油棕榈树农业。在多轮密集采伐后仍然存在的退化森林通常被认为没有什么保护价值；因此，没有协调一致的努力来防止它们被转变为油棕榈树。然而，还没有研究对反复砍伐的森林的生物多样性进行量化。我们比较了婆罗洲沙巴州未砍伐(主要)、一次砍伐和两次砍伐森林中鸟类和屎甲虫的物种丰富度和组成。伐木对鸟类的总体丰富度影响不大。甲虫丰富度在一次采伐后有所下降，但在两次采伐后不会进一步下降。鸟类和甲虫群落的物种组成发生了变化，特别是在第二次采伐轮伐后，但全球濒危鸟类(IUCN红色名录)在两次采伐后没有进一步下降。值得注意的是，在未砍伐的森林中发现的鸟类和屎甲虫物种中，超过75%的物种持续存在于两次砍伐的森林中。尽管两次砍伐的森林没有原始森林和一次砍伐的森林那么有生物价值，但它们显然为许多鸟类和屎甲虫物种提供了重要的栖息地。防止这些退化的森林变成油棕榈树应该是政策制定者和自然资源保护者的优先事项。
Southeast Asia is a hotspot of imperilled biodiversity, owing to extensive logging and forest conversion to oil palm agriculture. The degraded forests that remain after multiple rounds of intensive logging are often assumed to be of little conservation value; consequently, there has been no concerted effort to prevent them from being converted to oil palm. However, no study has quantified the biodiversity of repeatedly logged forests. We compare the species richness and composition of birds and dung beetles within unlogged (primary), once-logged and twice-logged forests in Sabah, Borneo. Logging had little effect on the overall richness of birds. Dung beetle richness declined following once-logging but did not decline further after twice-logging. The species composition of bird and dung beetle communities was altered, particularly after the second logging rotation, but globally imperilled bird species (IUCN Red List) did not decline further after twice-logging. Remarkably, over 75 per cent of bird and dung beetle species found in unlogged forest persisted within twice-logged forest. Although twice-logged forests have less biological value than primary and once-logged forests, they clearly provide important habitat for numerous bird and dung beetle species. Preventing these degraded forests from being converted to oil palm should be a priority of policy-makers and conservationists.