Genetic connectivity of coral-eating sea star Acanthaster planci populations during the severe outbreak of
Genetic connectivity of coral-eating sea star Acanthaster planci populations during the severe outbreak of
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严重爆发期间食珊瑚海星 Acanthaster planci 种群的遗传连通性
DOI：
10.1111/maec.12175
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Mehdi Adjeroud
中科院分区：
文献类型：
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作者：
.Nina Yasuda;Coralie Taquet;Satoshi Nagai;Terutoyo Yoshida;Mehdi Adjeroud
棘冠海星星星的偶尔种群爆发，是整个印度太平洋珊瑚礁的主要威胁。这些爆发的连续性和长的幼虫扩散阶段之间的假定关联使得估计幼虫扩散变得重要;许多研究已经使用不同的遗传标记检查了种群遗传结构ofA. planci为此目的。然而，只有少数人专注于珊瑚礁规模以及群岛规模的遗传结构，没有人使用不同遗传标记与不同有效种群规模的组合。在我们的研究中，我们使用mtDNA和微卫星位点在多个空间尺度（从<2 km到近300 km）上研究了法属波利尼西亚社会群岛的四个岛屿内和岛屿之间的A. planci种群遗传结构。我们的分析没有发现基于mtDNA的显著遗传结构（全局FST=-0.007，P = 0.997），使用微卫星位点的遗传结构水平较低（全局FST= 0.006，P = 0.005）。我们没有发现任何显着的隔离距离模式内的研究区域的遗传标记。在社会群岛的线粒体和核基因座ofA. planci中发现的整体遗传均质化模式强调了幼虫传播的重要作用，可能导致二次爆发，以及可能最近在该地区的殖民。
Occasional population outbreaks of the crown‐of‐thorns sea star,Acanthaster planci, are a major threat to coral reefs across the Indo‐Pacific. The presumed association between the serial nature of these outbreaks and the long larval dispersal phase makes it important to estimate larval dispersal; many studies have examined the population genetic structure ofA. plancifor this purpose using different genetic markers. However, only a few have focused on reef‐scale as well as archipelago‐scale genetic structure and none has used a combination of different genetic markers with different effective population sizes. In our study, we used both mtDNA and microsatellite loci to examineA. plancipopulation genetic structure at multiple spatial scales (from <2 km to almost 300 km) within and among four islands of the Society Archipelago, French Polynesia. Our analysis detected no significant genetic structure based on mtDNA (global FST= −0.007, P = 0.997) and low levels of genetic structure using microsatellite loci (global FST= 0.006, P = 0.005). We found no significant isolation by distance patterns within the study area for either genetic marker. The overall genetically homogenized pattern found in both the mitochondrial and nuclear loci ofA. planciin the Society Archipelago underscores the significant role of larval dispersal that may cause secondary outbreaks, as well as possible recent colonization in this area.