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首页> 外文期刊>Anais da Academia Brasileira de Ciências >Avian Communities in the Amazonian Cangas Vegetation: Biogeographic Affinities, Components of Beta-Diversity and Conservation
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Avian Communities in the Amazonian Cangas Vegetation: Biogeographic Affinities, Components of Beta-Diversity and Conservation

机译：Avian Communities在亚马逊Cangas植被中：生物地理性亲和力，β-多样性和保护的组成部分

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摘要

The Amazonian cangas is a vegetation type distributed as patches of open vegetation embedded in a matrix of tropical forest and that grows over iron-rich soils in the Serra dos Carajas region. To characterize cangas avifauna, we surveyed birds in eight patches varying from 43 to 1,366 hectares. Cangas avifauna has compositional affinities with savannas widespread throughout the Amazon and other biomes, and we estimate that more than 200 bird species occurs in this habitat. Species composition was relatively homogeneous, and the similarity among cangas patches was the dominant component of the beta-diversity. Bird communities in cangas patches exhibited statistically significant nested structure in respect to species richness and patch size. In contrast, the nested site arrangement was not affected by the isolation of patches. Number of species and composition are moderately affected by the area of cangas patches but not by its degree of isolation. To conserve this unique habitat are necessary a strict protection of carefully chosen patches of cangas and an investigation of the conservation value of secondary vegetation recovered by the mining companies.
机译：Amazonian Cangas是一种植被类型，作为嵌入在热带森林矩阵中的开放植被的斑块，并在血清DOS Carajas地区的富含铁土壤中生长。为了表征Cangas Avifauna，我们在八个不同43至1,366公顷的八个补丁中调查了鸟类。 Cangas Avifauna在亚马逊和其他生物群系中具有大草原的组成亲伴侣，我们估计了200多种鸟类在这一栖息地发生了。物种组合物相对均匀，钙质斑块的相似性是β-多样性的主要成分。苍蝇贴片中的鸟类社区在物种丰富性和补丁尺寸方面表现出统计上的嵌套结构。相比之下，嵌套的网站安排不受斑块隔离的影响。物种和组合物的数量受到粘膜斑块的适度影响，但不是其隔离程度。为了保护这种独特的栖息地，必须严格保护小巧的Cangas补丁以及矿业公司恢复的继发植被的保护价值的调查。

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