PDF(Pubmed)
Abstract：
Understory bird communities, especially those comprising insectivores, are highly sensitive to forest loss and fragmentation. Currently, there is little knowledge regarding the large-scale diversity patterns of understory bird communities, particularly in Eastern Asia. Consequently, we aimed to identify the distribution patterns of understory birds in southern China and the factors underlying these patterns. We analysed the diversity distribution patterns of taxonomic and functional α and β diversity for understory Passeriformes birds in southern China utilising cluster and ordination analyses. Subsequently, we analysed the effects of geographic distance, annual mean temperature, annual temperature range, annual mean precipitation, and annual precipitation range on diversity distribution patterns. In total, 9282 individuals belonging to 11 orders, 48 families, and 297 species were captured over 98,544 net hours, with Alcippeidae being the most abundant family in southern China. The understory bird communities of the 25 sites were categorised into six sub-regions of the Oriental Realm (Indo-Malayan Realm). The pattern in the distribution of taxonomic and functional β-diversity of understory birds in southern China was consistent with zoogeographical regionalisation. Three distinct geographical groups were identified: Group 1 was located in the Min-Guang Coast and Hainan sub-regions; Group 2 was located in the East Hilly Plain, Southwest Mountains, and Western Mountains and Plateaus sub-regions; and Group 3 was located in the Southern Yunnan Mountain subregion. The most critical factors related to the distribution patterns of β-diversity were geographical distance, annual mean temperature, and annual temperature range. Our results showed that the understory bird communities of the Southwest Mountain, East Hilly Plain, and Western Mountains, and Plateaus sub-regions were similar, as were those of the Min-Guang Coast and Hainan sub-regions. Our results underscore the joint roles of distance, temperature, and historical evolution in understory bird communities.
摘要：
林下鸟类社区，尤其是那些包含食虫动物的，对森林流失和碎片化高度敏感。目前,关于林下鸟类群落的大规模多样性模式知之甚少，特别是在东亚。因此,我们旨在确定中国南方林下鸟类的分布模式以及这些模式背后的因素。我们利用聚类和排序分析，分析了中国南方林下盘形鸟类的分类学和功能α和β多样性的多样性分布格局。随后，我们分析了地理距离的影响，年平均温度,年温度范围,年平均降水量,年降水量范围对多样性分布格局的影响。总的来说,属于11个订单的9282个人，48个家庭,在98,544净小时内捕获了297个物种，其中鸭科是中国南方最丰富的科。25个地点的林下鸟类群落被归类为东方王国（Indo-MalayanRealm）的六个子区域。中国南方林下鸟类分类和功能β多样性的分布规律与动物地理区划一致。确定了三个不同的地理组：第1组位于闽广海岸和海南次区域；第2组位于东部丘陵平原，西南山脉,和西部山区和高原次区域；第3组位于云南南部山区。与β多样性分布格局相关的最关键因素是地理距离,年平均温度,和年度温度范围。我们的结果表明，西南山的林下鸟类群落，东丘陵平原，西部山脉,和高原次区域相似，闽广海岸和海南次区域也是如此。我们的结果强调了距离的共同作用，温度,以及林下鸟类群落的历史演变。
