Stream flow alone does not predict population structure of diving beetles across complex tropical landscapes
Stream flow alone does not predict population structure of diving beetles across complex tropical landscapes
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仅凭溪流流量并不能预测复杂热带景观中潜水甲虫的种群结构
DOI：
10.1111/mec.14807
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发表时间：
2018
影响因子：
4.9
通讯作者：
Roderick
中科院分区：
文献类型：
--
作者：
Toussaint;Kindler;Van Dam;Panjaitan;Roderick
最近的理论进展假设了生境持久性在淡水生物种群遗传结构和生物多样性模式中的核心作用。在这里，我们提出了一种假设，即地理物种或谱系适应于相对稳定的流水栖息地（溪流及其边缘栖息地），由于其栖息地的持久性，它们具有高水平的地方性和系统地理结构。我们使用nextRAD DNA测序方法研究了一种假定分布在新几内亚的潜水甲虫Philaccolilus amelae （Dytiscidae）的种群结构和系统地理。我们发现p。改良系是一个形态上隐密，但在地理上和遗传上分化良好的分支。种群连通性的模式与与稳定的地理栖息地相关的理论预测是一致的。然而，在两个分支中，我们发现了一个更复杂的低种群分化模式，揭示了新几内亚崎岖的山脉和流域之间长达430公里的分散。这些结果虽然令人惊讶，但也与Southwood提出的栖息地模板概念的原始表述一致，该概念涉及响应非生物因素的谱系特异性进化。在我们的系统中，低种群分化可能反映了一个年轻的物种在利用广阔的可用栖息地的范围扩张阶段。我们认为，由水生生物和水生生物的二分法导致的生活史变化预测需要更多地关注栖息地特征和微栖息地选择。我们的研究结果还支持了在更大的地理尺度上研究精细尺度过程的必要性，而不是仅仅记录宏观生态模式，以了解区域生物多样性的生态驱动因素。在新几内亚等复杂和受威胁的环境中，对热带谱系进行全面采样仍然是一项重大挑战。
Recent theoretical advances have hypothesized a central role of habitat persistence on population genetic structure and resulting biodiversity patterns of freshwater organisms. Here, we address the hypothesis that lotic species, or lineages adapted to comparably geologically stable running water habitats (streams and their marginal habitats), have high levels of endemicity and phylogeographic structure due to the persistent nature of their habitat. We use a nextRAD DNA sequencing approach to investigate the population structure and phylogeography of a putatively widespread New Guinean species of diving beetle,Philaccolilus ameliae(Dytiscidae). We find thatP. ameliaeis a complex of morphologically cryptic, but geographically and genetically well‐differentiated clades. The pattern of population connectivity is consistent with theoretical predictions associated with stable lotic habitats. However, in two clades, we find a more complex pattern of low population differentiation, revealing dispersal across rugged mountains and watersheds of New Guinea up to 430 km apart. These results, while surprising, were also consistent with the original formulation of the habitat template concept by Southwood, involving lineage‐idiosyncratic evolution in response to abiotic factors. In our system, low population differentiation might reflect a young species in a phase of range expansion utilizing vast available habitat. We suggest that predictions of life history variation resulting from the dichotomy between lotic and lentic organisms require more attention to habitat characterization and microhabitat choice. Our results also underpin the necessity to study fine‐scale processes but at a larger geographical scale, as compared to solely documenting macroecological patterns, to understand ecological drivers of regional biodiversity. Comprehensive sampling especially of tropical lineages in complex and threatened environments such as New Guinea remains a critical challenge.
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影响因子：
3.3
作者：
J. K. Pritchard;Matthew Stephens;Peter Donnelly
通讯作者：
J. K. Pritchard;Matthew Stephens;Peter Donnelly
关于栖息地作为水生系统遗传结构预测因子的有效性：使用加州水甲虫的比较研究
影响因子：
4.9
作者：
Andrew E. Z. Short;M. Caterino
通讯作者：
M. Caterino
影响因子：
4.1
作者：
Bruxaux, Jade;Gabrielli, Maeva;Thebaud, Christophe
通讯作者：
Thebaud, Christophe
预防原则在不确定状态的分类群中的应用——以贝林格河龟为例。
影响因子：
3.1
作者：
A. Georges;R. Spencer;Michael A. Welsh;H. B. Shaffer;R. Walsh;Xiuwen Zhang
通讯作者：
Xiuwen Zhang
热带蚂蚁区系的适应性转变和扩散
影响因子：
3.3
作者：
E. Wilson
通讯作者：
E. Wilson