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Species richness and seasonality of forest avifauna in three South African Afromontane forests

机译：南非三种Afromontane森林森林鸟类的物种丰富度和季节变化。

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摘要

Presence data were recorded and analysed for avian bird species in a study of three separate Afromontane Forests in the KwaZulu-Natal Midlands, South Africa. Levels of endemism for South Africa and forest-specificity were investigated. In total, 136 species were identified utilizing forest, yet not all species occurred in all three forests. Slight differences in species composition are attributable to latitudinal and altitudinal differences as well as differences in disturbance regime. However, the respective subsets of forest-specific, frugivorous or migrant birds were similar between forests. Almost all forest-specific species were found at all three study sites and the absence of particular species may be attributable to extinction or rarity. Subsets of endemic frugivores and endemic forest-specific species were also similar between forests. Relatively high levels, for South Africa, of forest-specificity (about 24%) and endemicity (about 17%) were recorded, showing little seasonal variation in species numbers whereas frugivorous and migrant species showed seasonality in their presence. The importance of these forests in conserving avifaunal biodiversity in the region is highlighted. Bird ringing was conducted at two forests to supplement observational data, and assisted in detecting rare and cryptic species. Recommendations are made for the conservation of the larger forest patches, within a naturally fragmented biome.
机译：在南非夸祖鲁-纳塔尔中部地区的三个不同的Afromontane森林研究中，记录并分析了鸟类的存在信息。调查了南非的地方流行水平和森林特异性。总共有136种利用森林被识别，但是并不是所有的物种都出现在这三种森林中。物种组成的细微差异可归因于纬度和纬度差异以及干扰机制的差异。但是，在森林之间，特定于森林的，食肉性或迁徙性鸟类的各自子集相似。在所有三个研究地点都发现了几乎所有森林特有物种，缺少特定物种可能是由于物种灭绝或稀有。森林之间特有的节食动物亚群和特有的森林特有物种也很相似。在南非，相对较高的森林特异性（约24％）和特有度（约17％）被记录下来，表明物种数量几乎没有季节性变化，而食肉和移栖物种则存在季节性。强调了这些森林在保护该地区航空生物多样性方面的重要性。在两个森林中进行了鸟鸣，以补充观测数据，并帮助发现稀有和隐性物种。建议在自然破碎的生物群落中保护较大的森林斑块。

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