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Natural Windbreaks Sustain Bird Diversity in a Tea-Dominated Landscape

机译:天然防风林在以茶为主的景观中维持鸟类的多样性

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摘要

Windbreaks often form networks of forest habitats that improve connectivity and thus conserve biodiversity, but little is known of such effects in the tropics. We determined bird species richness and community composition in windbreaks composed of remnant native vegetation amongst tea plantations (natural windbreaks), and compared it with the surrounding primary forests. Fifty-one, ten-minute point counts were conducted in each habitat type over three days. Despite the limited sampling period, our bird inventories in both natural windbreaks and primary forests were nearly complete, as indicated by bootstrap true richness estimator. Bird species richness and abundance between primary forests and windbreaks were similar, however a difference in bird community composition was observed. Abundances of important functional groups such as frugivores and insectivores did not vary between habitat types but nectarivores were more abundant in windbreaks, potentially as a result of the use of windbreaks as traveling routes, foraging and nesting sites. This preliminary study suggests that natural windbreaks may be important habitats for the persistence of bird species in a production landscape. However, a better understanding of the required physical and compositional characteristics for windbreaks to sustain bird communities is needed for effective conservation management.
机译:防风林通常形成森林栖息地网络,从而改善连通性,从而保护生物多样性,但在热带地区对这种影响知之甚少。我们确定了茶园中自然植被残留的防风林中的鸟类物种丰富度和群落组成(自然防风林),并将其与周围的原始森林进行了比较。在三天内对每种栖息地类型进行了51个十分钟的点计数。尽管抽样时间有限,但自举式真实丰富度估算器显示,我们在自然防风林和原始森林中的鸟类清单几乎完整。原始森林和防风林之间的鸟类物种丰富度和丰度相似,但是观察到鸟类群落组成有所不同。不同生境类型之间重要的功能群(例如节食动物和食虫动物)的丰度没有变化,但防风林中的油桃更为丰富,这可能是由于将防风林用作行进路线,觅食和筑巢地点的结果。这项初步研究表明,自然防风林可能是鸟类在生产环境中持久存在的重要栖息地。但是,为了有效地进行保护管理,需要更好地了解防风林维持鸟类群落所需的物理和组成特征。

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