Inferring ecological explanations for biogeographic boundaries of parapatric Asian mountain frogs.
Inferring ecological explanations for biogeographic boundaries of parapatric Asian mountain frogs.
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推断亚洲山蛙的生物地理边界的生态解释
DOI：
10.1186/s12898-018-0160-5
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发表时间：
2018-02-02
期刊：
影响因子：
--
通讯作者：
Jiang J
中科院分区：
文献类型：
--
作者：
Hu J;Jiang J
在生态学、进化论和生物地理学中，识别和理解形成扩散障碍和由此产生的生物地理边界的机制一直是一个长期但具有挑战性的目标。准栖种具有稳定的、相邻的范围，没有任何物理障碍，在狭窄的接触带中有有限的范围重叠，是研究生物地理边界的一个有趣的系统。本文研究了两种蛙类的地理分布范围。太hangnica，在秦岭山脉的联系地带相遇，秦岭山脉是东亚的重要分水岭。为了确定两种亲缘关系密切的蛙种的越界范围可能的生态决定因素，我们结合生态位模型和排序技术，量化了它们在地理和环境空间上的生态位分化程度。我们测试了生物地理边界的两个可选的零假设（尖锐的环境梯度与不适合的栖息地带分隔两个高度适合的区域），反对零期望，即给定边界上的环境变化不大于偶然预期。结果两种准居种的生态位比偶然预测的更接近，但不完全相同。没有发现明显的环境梯度，而不适宜的栖息地带确实起到了屏障作用。四边形，但不是f。taihangnica。结论结合历史生物地理信息，我们的研究结果表明，在接触带，环境耐受性受到限制。而种间竞争很可能阻止了它们向南扩张。taihangnica。这项研究强调了气候和竞争在探索生态相似的青蛙物种之间的越界范围边界的生态学解释中的重要性，特别是在气候变化的影响下。
BackgroundIdentifying and understanding the mechanisms that shape barriers to dispersal and resulting biogeographic boundaries has been a longstanding, yet challenging, goal in ecology, evolution and biogeography. Characterized by stable, adjacent ranges, without any intervening physical barriers, and limited, if any, range overlap in a narrow contact zone, parapatric species are an interesting system for studying biogeographic boundaries. The geographic ranges of two parapatric frog species,Feirana quadranusandF. taihangnica, meet in a contact zone within the Qinling Mountains, an important watershed for East Asia. To identify possible ecological determinants of the parapatric range boundaries for two closely related frog species, we quantified the extent of their niche differentiation in both geographical and environmental space combining ecological niche models with an ordination technique. We tested two alternative null hypotheses (sharp environmental gradients versus a ribbon of unsuitable habitat dividing two highly suitable regions) for biogeographic boundaries, against the null expectation that environmental variation across a given boundary is no greater than expected by chance.ResultsWe found that the niches of these two parapatric species are more similar than expected by chance, but not equivalent. No sharp environmental gradient was found, while a ribbon of unsuitable habitat did act as a barrier forF. quadranus, but not forF. taihangnica.ConclusionsIntegrating our findings with historical biogeographic information, our results suggest that at a contact zone, environmental tolerance restrictedF. quadranusfrom dispersing further north, while interspecific competition most likely prevented the southward expansion ofF. taihangnica. This study highlights the importance of both climate and competition in exploring ecological explanations for parapatric range boundaries between ecologically similar frog species, in particular under the effects of changing climate.
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影响因子：
6.4
作者：
Laube, Irina;Graham, Catherine H.;Boehning-Gaese, Katrin
通讯作者：
Boehning-Gaese, Katrin
影响因子：
6.4
作者：
Broennimann, Olivier;Fitzpatrick, Matthew C.;Guisan, Antoine
通讯作者：
Guisan, Antoine
影响因子：
4.8
作者：
Cunningham, Heather R.;Rissler, Leslie J.;Apodaca, Joseph J.
通讯作者：
Apodaca, Joseph J.
影响因子：
3.9
作者：
Araujo, Miguel B.;Guisan, Antoine
通讯作者：
Guisan, Antoine
DOI：
10.1002/joc.1276
发表时间：
2005-12-01
期刊：
INTERNATIONAL JOURNAL OF CLIMATOLOGY
影响因子：
--
作者：
Hijmans, RJ;Cameron, SE;Jarvis, A
通讯作者：
Jarvis, A