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Seasonal use of remnant forest fragments by understorey forest birds in the Uluguru Mountains, Tanzania: a conservation priority

机译:坦桑尼亚乌鲁格鲁山脉下层森林鸟类对残留森林碎片的季节性利用:保护重点

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摘要

Forest fragmentation can lead to extinctions of some species at local levels and is eroding bird diversity at an increasing rate. While there is information on the distribution of forest bird species in most of the Eastern Arc Mountain forests, some forests, particularly the smaller fragments, have not been adequately surveyed. Using mist netting we surveyed avifauna in some of the poorly known forests (12.5-25 ha) located 320-1 300 m above sea level in the Uluguru Mountains in order to address their conservation importance. Proportions of seasonal altitudinal migrants were significantly higher in these lower-altitude forests during the cold season than the hot season. The results suggest that these forests support bird species of conservation concern, most of which are forest dependent and some of which make seasonal movements between high-altitude montane forests and lowland/ foothill forests. These forests are important cold-season habitat of altitudinal migrants and further fragmentation should be halted as a matter of regional and global priority.
机译:森林碎片化可能导致某些物种在当地灭绝,并以越来越快的速度侵蚀鸟类的多样性。尽管有关于大多数东弧山森林中森林鸟类种类分布的信息,但尚未对某些森林(尤其是较小的碎片)进行充分调查。我们使用薄雾网对乌鲁古鲁山脉海拔320-1 300 m的一些鲜为人知的森林(12.5-25公顷)进行了调查,以探讨其保护的重要性。在寒冷季节,这些低海拔森林中季节性海拔迁徙的比例明显高于炎热季节。结果表明,这些森林支持鸟类保护,其中大多数是依赖森林的,并且其中一些在高海拔山地森林和低地/山麓森林之间进行季节性运动。这些森林是海拔高度重要的季节性迁徙者的重要栖息地,应将其进一步破碎化作为区域和全球优先事项。

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