Phylogeography and population genomics of a lotic water beetle across a complex tropical landscape

Phylogeography and population genomics of a lotic water beetle across a complex tropical landscape
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复杂热带景观中水甲虫的系统发育地理学和群体基因组学

DOI:
10.1111/mec.14796
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发表时间:
2018
期刊:
影响因子:
4.9
通讯作者:
Michael
Michael
中科院分区:
生物学1区
文献类型:
--
作者:
Athena Wai;Gueuning;Morgan;Kindler;Carolin;van Dam;Matthew;Alvarez;Panjaitan;Rawati;Shaverdo;Helena;Lloyd T;Roderick;George K;Michael

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适用于淡水系统的生境模板概念表明,流质物种,或那些占据河流沿岸永久生境的物种,比流质物种,或那些出现在更短暂的水生生境中的物种分散得更少。因此,lotic物种的种群将比lphysical物种的种群更加结构化。溪流既包括流动的水,也包括小的、停滞的微栖息地,当溪流水位低时,这些微栖息地可以提供避难所。许多物种出现在这些微生境中,但研究仍然很少。在这里,我们提供了一种这样的物种,热带潜水甲虫exocelina manokwariensis(Dytiscidae)的种群遗传数据,这些样本来自新几内亚鸟头半岛约300公里横断面的六个地点。来自线粒体(CO1序列)和核(ddRAD位点)区域的分子数据记录了距离约45公里的人群的精细尺度群体结构。我们的结果与先前将栖息地模板概念应用于水生系统的系统发育和宏观生态学研究一致。该研究还表明,这些多样但大多被忽视的微栖息地是淡水生态学和进化生物学中有前途的研究系统。随着新一代测序技术的出现,对小型非模式生物进行小尺度种群基因组研究是可行的,这有助于阐明生境稳定性对物种自然历史、种群结构和地理分布的影响。
The habitat template concept applied to a freshwater system indicates that lotic species, or those which occupy permanent habitats along stream courses, are less dispersive than lentic species, or those that occur in more ephemeral aquatic habitats. Thus, populations of lotic species will be more structured than those of lentic species. Stream courses include both flowing water and small, stagnant microhabitats that can provide refuge when streams are low. Many species occur in these microhabitats but remain poorly studied. Here, we present population genetic data for one such species, the tropical diving beetleExocelina manokwariensis(Dytiscidae), sampled from six localities along a ~300 km transect across the Birds Head Peninsula of New Guinea. Molecular data from both mitochondrial (CO1 sequences) and nuclear (ddRAD loci) regions document fine‐scale population structure across populations that are ~45 km apart. Our results are concordant with previous phylogenetic and macroecological studies that applied the habitat template concept to aquatic systems. This study also illustrates that these diverse but mostly overlooked microhabitats are promising study systems in freshwater ecology and evolutionary biology. With the advent of next‐generation sequencing, fine‐scale population genomic studies are feasible for small nonmodel organisms to help illuminate the effect of habitat stability on species’ natural history, population structure and geographic distribution.
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