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Factors Affecting Geographic Variation in Echolocation Calls of the Endemic Myotis davidii in China

机译：影响中国地方性鼠耳蝠回声定位的地理变异因素

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摘要

The sensory drive hypothesis of speciation predicts that divergence in communication systems will occur when environments differ and that this sensory divergence can ultimately promote speciation. The factors affecting geographic evolution in acoustic signals remain poorly understood, especially in the contexts of high gene flow. This study investigated variation patterns in peak frequency emitted by the Chinese endemic Myotis davidii on a broad geographic scale by evaluating the relative importance of morphological, environmental, geographic, and genetic variables. Significant variation in peak frequency was observed among regions, but peak frequencies among populations within region had some percentage of similarity. Differences in peak frequency were not associated with morphological difference, genetic structure, and geographic distance among regions, which suggested that peak frequency divergences in M. davidii were not the primary driver of regions' isolation in a context of weak gene flow. Within the Middle East Plain (MEP), one of the regions delineated in this study, peak frequency differences of M. davidii were not significantly correlated with genetic distance and geographic distance among populations, suggesting that peak frequency was not be subject to cultural drift within MEP. Our results provide evidence that geographic variation in echolocation call design may evolve as a consequence of local adaptation to climate conditions.
机译：物种形成的感觉驱动假设预测，当环境不同时，通信系统中会发生分歧，并且这种感觉分歧最终会促进物种形成。影响声信号中地理演化的因素仍然知之甚少，尤其是在高基因流量的情况下。这项研究通过评估形态，环境，地理和遗传变量的相对重要性，在广泛的地理范围内调查了中国地方性鼠耳蝠Myotis davidii发出的峰值频率的变化模式。在区域之间观察到峰值频率的显着变化，但是区域内人群之间的峰值频率具有一定百分比的相似性。峰值频率的差异与区域之间的形态差异，遗传结构和地理距离无关，这表明在弱基因流动的情况下，大卫分枝杆菌的峰值频率差异不是区域隔离的主要驱动力。在本研究中所描述的地区之一的中东平原（MEP）中，大卫分枝杆菌的峰值频率差异与种群之间的遗传距离和地理距离没有显着相关，这表明峰值频率不受该区域内文化漂移的影响。环保部。我们的结果提供了证据，表明回声定位呼叫设计中的地理变化可能会由于局部适应气候条件而演变。

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