Afiq-Rosli Lutfi, Wainwright Benjamin John, Gajanur Anya Roopa, Lee Ai Chin, Ooi Seng Keat, Chou Loke Ming, Huang Danwei
Department of Biological Sciences National University of Singapore Singapore Singapore.
Tropical Marine Science Institute National University of Singapore Singapore Singapore.
Evol Appl. 2021 Jul 27;14(10):2502-2515. doi: 10.1111/eva.13276. eCollection 2021 Oct.
Information about the distribution of alleles among marine populations is critical for determining patterns of genetic connectivity that are essential in modern conservation planning. To estimate population connectivity in Singapore's urbanized equatorial reef system, we analysed single nucleotide polymorphisms (SNPs) from two species of reef-building corals with distinct life histories. For sp., a broadcast-spawning coral, we found cryptic lineages that were differentially distributed at inshore and central-offshore sites that could be attributed to contemporary surface current regimes. Near panmixia was observed for with differentiation of colonies at the farthest site from mainland Singapore, a possible consequence of the brooding nature and relatively long pelagic larval duration of the species. Furthermore, analysis of recent gene flow showed that 60-80% of colonies in each population were nonmigrants, underscoring self-recruitment as an important demographic process in this reef system. Apart from helping to enhance the management of Singapore's coral reef ecosystems, findings here pave the way for better understanding of the evolution of marine populations in South-East Asia.
等位基因在海洋种群中的分布信息对于确定基因连通性模式至关重要，而基因连通性模式在现代保护规划中必不可少。为了估计新加坡城市化赤道珊瑚礁系统中的种群连通性，我们分析了两种具有不同生活史的造礁珊瑚的单核苷酸多态性（SNP）。对于一种散播产卵的珊瑚物种，我们发现了隐秘谱系，它们在近岸和中远岸站点的分布存在差异，这可能归因于当代的表层海流状况。对于另一种珊瑚物种，在离新加坡大陆最远的站点观察到了群体分化，呈现出近乎随机交配的情况，这可能是该物种的抱卵性质和相对较长的浮游幼虫期导致的。此外，对近期基因流动的分析表明，每个种群中60 - 80%的群体是非迁移者，这突出了自我补充作为该珊瑚礁系统中一个重要人口统计学过程的地位。除了有助于加强新加坡珊瑚礁生态系统的管理外，这里的研究结果为更好地理解东南亚海洋种群的进化铺平了道路。
