First come, first served: possible role for priority effects in marine populations under different degrees of dispersal potential

Aim Studying clearly delineated populations in marine lakes, islands of sea, we investigate the interplay of habitat size, immigration, and priority effects in shaping marine population genetic structure. Location Marine lakes and coastal locations in Indonesia, Palau, Papua New-Guinea and Australia. Taxon Mussels (Mytillidae, Brachidontes spp.) Methods Populations were sampled from four coastal locations and 22 marine lakes of similar age (~8,000 years), yet differing in size (0.04 - 4.7 km2) and degree of connection to the adjacent sea. While some lakes are highly connected, allowing potential influx of larvae from the sea, others have very limited water exchange. We assessed the phylogeographic structure and demographic history using mitochondrial and nuclear DNA sequence data, and combined this with geometric morphometrics. The effects of lake characteristics on population genetic diversity and structure were tested using linear regression and Mantel tests. Results Each lake contain...

本研究以海中孤岛——海洋湖泊中界定清晰的种群为研究对象，旨在探究生境面积、移民扩散与优先效应在塑造海洋种群遗传结构过程中的相互作用机制。
研究区域：印度尼西亚、帕劳、巴布亚新几内亚及澳大利亚的海洋湖泊与沿岸区域。
研究类群：贻贝科（Mytilidae）偏顶蛤属（Brachidontes spp.）物种。
研究方法：从4处沿岸区域与22个年龄相近（约8000年）的海洋湖泊中采集种群样本；这些湖泊面积介于0.04至4.7平方千米，与邻近海域的连通程度各异：部分湖泊连通性极强，可接纳海域幼虫的迁入，而部分湖泊的水体交换则极为有限。本研究依托线粒体与核DNA序列数据解析种群的系统地理结构及种群历史动态，并结合几何形态测量学开展分析；采用线性回归与曼特尔（Mantel）检验，评估湖泊特征对种群遗传多样性与遗传结构的影响。
研究结果：每个湖泊均包含……