Biotic interactions help explain variation in elevational range limits of birds among Bornean mountains
Biotic interactions help explain variation in elevational range limits of birds among Bornean mountains
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生物相互作用有助于解释婆罗洲山脉鸟类海拔范围限制的变化
DOI：
10.1111/jbi.13784
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发表时间：
2020
影响因子：
3.9
通讯作者：
Sheldon, Frederick H.
中科院分区：
文献类型：
--
作者：
Burner, Ryan C.;Boyce, Andy J.;Bernasconi, David;Styring, Alison R.;Shakya, Subir B.;Boer, Chandradewana;Rahman, Mustafa Abdul;Martin, Thomas E.;Sheldon, Frederick H.
生理耐受性和生物相互作用沿着生境梯度被认为影响物种发生。这种力量造成的分布差异在热带山区特别明显，在相对较短的距离内，物种沿着海拔梯度的更替率很高，特定物种的海拔分布可能在山区之间发生变化。这种变化被解释为种间竞争和生境或气候梯度的空间变异的重要性的证据。为了评估栖息地和气候带的竞争和压缩在设定范围限制中的相对重要性，我们研究了婆罗洲四座具有不同特征的山脉之间森林鸟类物种海拔范围的差异。Pueh和Topap Oso。分类学雨林鸟类群落沿着海拔梯度。方法我们调查了婆罗洲四座山上的雨林鸟类的海拔范围，以测试环境变量-栖息地区域压缩或可能的竞争者的存在-最佳预测的山区物种海拔范围的差异。为了这个目的，我们使用了两个互补的测试：对山脉之间的海拔范围限制的比较，和线性混合模型与天真的占用率作为response variable.ResultsWe发现，低地物种发生在海拔较高的两个小山相比，山。穆鲁这一结果是不一致的期望，栖息地的分布是海拔高度压缩的小山区，但与假设，减少竞争（可能扩散）在短的山区，这在很大程度上缺乏山地专业物种，使低地物种发生在海拔较高的是一致的。竞争的相对影响随着海拔的变化，和山地物种的范围下限和它们的竞争对手的分布之间的相关性弱于在低地species.Main conclusionsThese研究结果提供支持的重要性，生物相互作用在设置海拔范围限制的热带鸟类物种，虽然非生物梯度解释了大部分的分布格局。因此，预测气候变化情景下的范围变化的模型不仅必须包括目前最常见的气候变量，而且还必须包括物种相互作用可能导致的变化的信息，特别是对于低地物种。
AimPhysiological tolerances and biotic interactions along habitat gradients are thought to influence species occurrence. Distributional differences caused by such forces are particularly noticeable on tropical mountains, where high species turnover along elevational gradients occurs over relatively short distances and elevational distributions of particular species can shift among mountains. Such shifts are interpreted as evidence of the importance of spatial variation in interspecific competition and habitat or climatic gradients. To assess the relative importance of competition and compression of habitat and climatic zones in setting range limits, we examined differences in elevational ranges of forest bird species among four Bornean mountains with distinct features.LocationBornean mountains Kinabalu, Mulu, Pueh and Topap Oso.TaxonRain forest bird communities along elevational gradients.MethodsWe surveyed the elevational ranges of rain forest birds on four mountains in Borneo to test which environmental variables—habitat zone compression or presence of likely competitors—best predicted differences in elevational ranges of species among mountains. For this purpose, we used two complementary tests: a comparison of elevational range limits between pairs of mountains, and linear mixed models with naïve occupancy as the response variable.ResultsWe found that lowland species occur higher in elevation on two small mountains compared to Mt. Mulu. This result is inconsistent with the expectation that distributions of habitats are elevationally compressed on small mountains, but is consistent with the hypothesis that a reduction in competition (likely diffuse) on short mountains, which largely lack montane specialist species, allows lowland species to occur higher in elevation. The relative influence of competition changes with elevation, and the correlation between lower range limits of montane species and the distribution of their competitors was weaker than in lowland species.Main conclusionsThese findings provide support for the importance of biotic interactions in setting elevational range limits of tropical bird species, although abiotic gradients explain the majority of distribution patterns. Thus, models predicting range shifts under climate change scenarios must include not only climatic variables, as is currently most common, but also information on potentially resulting changes in species interactions, especially for lowland species.
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