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首页> 外文期刊>Limnology >Habitat segregation and genetic relationship of two heptageniid mayflies, Epeorus latifolium and Epeorus l-nigrus, in the Shinano-gawa River basin
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Habitat segregation and genetic relationship of two heptageniid mayflies, Epeorus latifolium and Epeorus l-nigrus, in the Shinano-gawa River basin

机译：信浓川流域的两个七叶树类可能的栖息地分离和遗传关系

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摘要

The heptageniid mayflies Epeorus latifolium and Epeorus l-nigrus are often the dominant species in the upper and midstream areas of Japanese rivers; as such, they play a significant role in river ecosystems. However, although these two species have been identified using the morphological characteristics of the male in its adult stage, it is impossible to differentiate them in their nymphal stage. We conducted a study to elucidate their distribution pattern, i.e., the current distribution of these two species in the Shinano-gawa River basin, based on quantitative field sampling and genetic analysis of nymphs and also some male adults; for these, it was possible to differentiate between the two species reliably. The data collected from the 30 study sites of the 1-year-long study revealed that the E. latifolium and/or E. l-nigrus mayflies are clearly distributed over a very broad area, and they appeared to be the dominant species at about a third of the study sites. Based on our genetic analysis, including several male adult specimens of E. latifolium and E. l-nigrus, it was clearly revealed that E. latifolium and E. l-nigrus respectively form two separate monophyletic clades. That is, E. latifolium and E. l-nigrus are clearly genetically differentiated, and they are considered to each represent a discrete species. Then, we plotted the collection sites of reliably identified specimens of E. latifolium and E. l-nigrus on the Shinano-gawa River basin map. This resultant map clearly displays that E. latifolium is distributed in the upper stream area rather than E. l-nigrus. To conclude, a pronounced ‘habitat segregation’ or ‘current distribution’ is clearly observable.
机译：在日本河流的中上游地区，七叶may可能是Ep（Epoeorus latifolium）和and（Epoeorus l-Nigrus）的优势种。因此，它们在河流生态系统中发挥着重要作用。然而，尽管已经使用成年期雄性的形态特征鉴定了这两个物种，但在若虫阶段无法区分它们。我们进行了一项研究，以阐明它们的分布模式，即根据信虫和一些成年雄性的定量田间采样和遗传分析，这两种物种在信浓川河流域的当前分布；为此，可以可靠地区分这两个物种。这项历时1年的研究从30个研究地点收集的数据表明，大叶大肠杆菌和/或N形花may可能明显分布在很宽的区域，它们似乎是约占主导地位的物种。三分之一的研究地点。根据我们的遗传分析，包括几个大叶盲肠和黑色猪笼草的成年雄性标本，可以清楚地发现，大叶盲肠和黑色猪笼草分别形成两个单独的单系进化枝。就是说，大叶大肠杆菌和黑猪大肠杆菌在遗传上明显不同，因此它们被认为代表了一个离散的物种。然后，我们在信浓川河流域地图上绘制了可靠鉴定的大肠埃希菌和大肠埃希菌的标本的收集地点。该结果图清楚地显示了大叶大肠杆菌分布在上游区域而不是黑猪。总而言之，明显的“居住隔离”或“当前分布”是显而易见的。

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  • 来源
    《Limnology》 |2011年第2期|p.117-125|共9页
  • 作者

    Masaki Ogitani; Kazuki Sekiné; Koji Tojo;

  • 作者单位

    Department of Environmental System Science, Graduate School of Science and Technology, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan;

    Department of Mountain and Environmental Science, Interdisciplinary Graduate School of Science and Technology, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan;

    Department of Biology, Faculty of Science, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan;

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  • 正文语种 eng
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  • 关键词

    Heptageniidae; Population structure; Genetic structure; Current distribution; Mitochondrial DNA; COI;

    机译：七尾科;种群结构;遗传结构;电流分布;线粒体DNA;COI;

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