Chloroplast DNA phylogeography of the Holly mangroveAcanthus ilicifoliusin the Indo-West Pacific
Chloroplast DNA phylogeography of the Holly mangroveAcanthus ilicifoliusin the Indo-West Pacific
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印度-西太平洋冬青红树 Acanthus ilicifolius 的叶绿体 DNA 系统发育地理学
DOI：
10.1007/s10750-020-04372-1
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发表时间：
2020
期刊：
影响因子：
2.6
通讯作者：
Huang Yelin
中科院分区：
文献类型：
--
作者：
Guo Wuxia;Banerjee Achyut Kumar;Ng Wei Lun;Yuan Yang;Li Weixi;Huang Yelin
冬青是印度-西太平洋地区广泛分布的一种红树林，具有很高的生态价值。在这项研究中，我们分析了在其分布范围内的物种的遗传变异模式，并评估了可能影响其遗传结构的因素，在整个IWP使用的数据从四个叶绿体DNA片段。我们的研究结果表明，在物种水平上的遗传多样性很高，种群内的变异很小，表明限制基因流的限制。冬青属种群在印度洋和太平洋的种群之间发现了强烈的遗传分化，这可能是由于马来半岛（或过去的巽他大陆）的陆地屏障效应。生态位模拟结果表明，两组间的生态位分化不明显，表明生态分化对A.冬青属尽管有远距离传播的能力，但在太平洋内发现的遗传障碍表明，洋流是该地区基因流动的神秘障碍。本研究为深入了解国际湿地保护区内红树林物种的历史种群动态提供了新的视角，对红树林的长期保护具有重要意义。冬青属
Acanthus ilicifoliusis a widespread mangrove species in the Indo-West Pacific (IWP) with high ecological value. In this study, we analyzed the patterns of genetic variation in the species across its distribution range and assessed factors that may have influenced its genetic structure across the IWP using data from four chloroplast DNA fragments. Our results demonstrated high genetic diversity at the species level with little variation within populations, indicating restricted gene flow amongA. ilicifoliuspopulations. Strong genetic divergence was found between populations in the Indian Ocean and populations in the Pacific Ocean, likely due to the land barrier effect of the Malay Peninsula (or in the past, the Sundaland). Ecological niche modeling revealed no significant niche differentiation between the two groups, suggesting that ecological divergence was less responsible for the divergence ofA. ilicifolius. Despite the ability for long-distance dispersal, genetic barriers identified within the Pacific Ocean suggested ocean currents to be a cryptic barrier for gene flow in this region. This study provides new insights into the historical population dynamics of mangrove species in the IWP region and is valuable for the long-term conservation ofA. ilicifolius.