Facultad de Ciencias Básicas, Universidad del Magdalena, Santa Marta, Magdalena, Colombia.
Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, United States of America.
PeerJ. 2022 Aug 30;10:e13854. doi: 10.7717/peerj.13854. eCollection 2022.
Using a standardized SNP array, we identified two populations of and one population of in the Caribbean coast of Colombia. San Andrés was the most genetically differentiated location for both species. An average pairwise F value of 0.131 and 0.050 between San Andrés and neighboring collection sites was estimated, for and respectively. Based on population patterns of both acroporid species, we inferred that Magdalena River is not a barrier of genetic connectivity among Colombian populations. Genetic comparisons between the Colombian coast of Caribbean with other Caribbean locations agree with previous studies for both species where four populations were identified in and three in Our results support published bio-physical model predictions and highlight the Panama-Colombia gyre as a possible isolating mechanism within the western Caribbean. However, the genetic diversity in both species was about half (mean HE per site = 0.321 in and 0.369 in ) than previous estimates in acroporid populations in the Caribbean. The lower genetic diversity as well their relative isolation and high levels of reef degradation may be of particular conservation concern that may require species-specific management coupled with science-based restoration efforts.
利用标准化的 SNP 芯片，我们在哥伦比亚加勒比海岸确定了两个 和一个 种群。圣安德烈斯岛是这两个物种遗传分化最显著的地方。估计圣安德烈斯岛和邻近采集点之间的平均成对 F 值分别为 0.131 和 0.050，用于 和 。基于这两个鹿角珊瑚物种的种群模式，我们推断玛格达莱纳河不是哥伦比亚种群之间遗传连通性的障碍。与这两个物种的其他加勒比地区的遗传比较与之前的研究一致，在 和 中分别确定了四个和三个种群。我们的研究结果支持已发表的生物物理模型预测，并强调巴拿马-哥伦比亚环流可能是西加勒比地区的一个隔离机制。然而，这两个物种的遗传多样性（每个位点的平均 HE 分别为 0.321 和 0.369）比之前在加勒比地区的鹿角珊瑚种群中的估计要低一半左右。较低的遗传多样性以及它们的相对隔离和高程度的珊瑚礁退化可能是特别值得关注的保护问题，可能需要针对特定物种的管理，并结合基于科学的恢复工作。
