Overlap in avian communities produces unimodal richness peaks on Bornean mountains
Overlap in avian communities produces unimodal richness peaks on Bornean mountains
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鸟类群落的重叠在婆罗洲山脉产生了单峰丰富度峰值
DOI：
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发表时间：
2018
影响因子：
1.4
通讯作者：
F. Sheldon
中科院分区：
文献类型：
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作者：
Ryan C. Burner;A. Styring;Chandradewana Boer;F. Sheldon
摘要：海拔梯度为研究相对较短距离内物种丰富度和群落组成的变化提供了易于处理的、可重复的系统。以前，丰富度通常被认为是随着海拔的升高而单调下降的，但最近的荟萃分析表明，更复杂的模式，包括中等海拔的丰富度高峰，也普遍存在于鸟类中。在这项研究中，我们使用点计数法在Sundaland的婆罗洲岛上的三座山上对不同海拔的鸟类进行了调查，该地区无法对鸟类的海拔分布进行定量分析。我们总共在527个地点进行了1088个点的计数并收集了相关的栖息地数据，以估计木鲁山(2376米)、普埃山(1550米)和托帕奥索山(1450米)的物种丰富度。在唯一具有完整栖息地梯度的木鲁山上，鸟类物种丰富度的峰值在600米。托塔奥索的物种丰富度似乎也在600米处达到峰值，但在普埃岛上的物种丰富度峰值比600米高几百米。木鲁的丰富度峰值不同于零模型预测的丰富度峰值，而是由不同的低地鸟类和山地鸟类重叠造成的，支持动物群重叠假说。这一发现进一步证明，高峰周转率和高峰丰富度之间缺乏重合并不足以排除动物群重叠作为原因因素的可能性。
Abstract: Altitudinal gradients provide tractable, replicated systems in which to study changes in species richness and community composition over relatively short distances. Previously, richness was often assumed to follow a monotonic decline with altitude, but recent meta-analyses show that more complex patterns, including mid-altitude richness peaks, are also prevalent in birds. In this study, we used point counts to survey birds at multiple altitudes on three mountains on the island of Borneo in Sundaland, an area for which quantitative analyses of avian altitudinal distribution are unavailable. In total we conducted 1088 point counts and collected associated habitat data at 527 locations to estimate species richness by altitude on Mt Mulu (2376 m), Mt Pueh (1550 m) and Mt Topap Oso (1450 m). On Mulu, the only mountain with an intact habitat gradient, bird species richness peaks at 600 m. Richness appeared to peak at 600 m on Totap Oso as well, but on Pueh it peaked several hundred metres higher. The richness peak on Mulu differs from that predicted by null models and is instead caused by the overlap of distinct lowland and montane avifaunas, supporting the faunal overlap hypothesis. This finding provides further evidence that a lack of coincidence between peak turnover and peak richness is not sufficient evidence to rule out faunal overlap as a causal factor.
影响因子：
6.5
作者：
de Bruyn, Mark;Stelbrink, Bjoern;von Rintelen, Thomas
通讯作者：
von Rintelen, Thomas
影响因子：
11.6
作者：
Malhi, Y.;Silman, M.;Saatchi, S.
通讯作者：
Saatchi, S.