Phylogeography of the component species of broad-leaved evergreen forests in Japan, based on chloroplast DNA variation
Phylogeography of the component species of broad-leaved evergreen forests in Japan, based on chloroplast DNA variation
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DOI：
10.1007/s10265-003-0132-4
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发表时间：
2004-02-01
影响因子：
2.8
通讯作者：
Murakami, N
中科院分区：
文献类型：
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作者：
Aoki, K;Suzuki, T;Murakami, N
为了阐明常绿阔叶林过去的分布和定居路线，我们调查了日本及周边地区常绿阔叶林的种内系统地理格局。我们选择了6种地理分布相似的成分物种，生长在以锥树为优势的森林中。我们将冰川时期可能的重要避难所定义为稀有单倍型丰富的地区(频率小于或等于5%)，或常见单倍型丰富的地区(频率大于5%)。然后，我们通过比较6个组成种在这两个参数(即单倍型唯一性和单倍型数量)上的种内系统地理格局来确定避难地。在本研究过程中获得了以下结果：(1)稀有单倍型分布在日本主要岛屿周围的岛屿上；(2)九州观察到罕见的亚型和最多的常见单倍型，这一发现与表明九州南部曾经存在避难所的花粉化石数据相一致；(3)在室户半岛发现了稀有的单倍型，在Kii半岛观察到了第二多的常见单倍型，这一发现表明在冰川时代日本太平洋沿岸存在额外的重要避难所。
In order to elucidate the past distribution and colonization routes of broad-leaved evergreen (lucidophyllous) forests, we investigated the intraspecific phylogeographic patterns of lucidophyllous forests in Japan and surrounding areas. We selected 6 component species with a similar geographic distributions growing in Castanopsis-dominant forests. We defined possible important refugia during the glacial periods as the regions rich in rare haplotypes (with a frequency of 5% or less), or as regions rich in the number of common haplotypes (with a frequency of more than 5%). We then located the sites of refuge by comparing the intraspecific phylogeographic patterns among 6 component species of lucidophyllous forests with respect to these two parameters (i.e., haplotype uniqueness and the number of haplotypes). The following results were obtained during the course of this study: (1) rare haplotypes were distributed among islands around the main islands of Japan; (2) rare subtypes and the greatest numbers of common haplotypes were observed in Kyushu, a finding which agreed with fossilized pollen data demonstrative of the past existence of refugia in southern Kyushu; and (3) rare haplotypes were found on the Muroto Peninsula, and the second greatest numbers of common haplotypes were observed on the Kii Peninsula, a finding which suggested the existence of additional important refugia along the Pacific coast of Japan during the glacial ages.