Gasca-Pineda Jaime, Velez Patricia, Hosoya Tsuyoshi
UBIPRO, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, 54090, Estado de México, Mexico Universidad Nacional Autónoma de México Estado de México Mexico.
Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, Mexico City, 04510, Mexico Universidad Nacional Autónoma de México Mexico City Mexico.
MycoKeys. 2020 Mar 10;65:1-24. doi: 10.3897/mycokeys.65.48409. eCollection 2020.
During the Last Glacial Maximum (LGM), drastic environmental changes modified the topology of the Japanese Archipelago, impacting species distributions. An example is , which has a present continuous distribution throughout Japan. However, by the end of the LGM it was restricted to southern refugia. Similarly, (Leotiomycetes, Helotiales, Lachnaceae) occurs strictly on cupules of , sharing currently an identical distribution. As the effects of the LGM remain poorly understood for saprobiotic microfungal species, herein we identified past structuring forces that shaped the current genetic diversity within in relation to its host using a phylogeographic approach. We inferred present and past potential distributions through species distribution modeling, identifying environmental suitability areas in mid-southern Japan from which subsequent colonizations occurred. Our findings suggest that current high genetic diversity and lack of genetic structure within are the result of recent multiple re-colonization events after the LGM.
在末次盛冰期（LGM）期间，剧烈的环境变化改变了日本列岛的地形，影响了物种分布。一个例子是 ，它目前在日本各地呈连续分布。然而，到末次盛冰期末期，它仅限于南部避难所。同样， （散囊菌纲，柔膜菌目，柔膜菌科）严格生长在 的壳斗上，目前分布相同。由于对于腐生微真菌物种，末次盛冰期的影响仍知之甚少，在此我们使用系统地理学方法确定了过去塑造 与其宿主之间当前遗传多样性的构建力量。我们通过物种分布建模推断当前和过去的潜在分布，确定日本中南部适合环境的区域，随后的定殖由此发生。我们的研究结果表明， 目前的高遗传多样性和缺乏遗传结构是末次盛冰期后近期多次重新定殖事件的结果。
