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首页> 外文期刊>Marine ecology >The coral communities of the Islas Marias archipelago, Mexico: structure and biogeographic relevance to the Eastern Pacific
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The coral communities of the Islas Marias archipelago, Mexico: structure and biogeographic relevance to the Eastern Pacific

机译：墨西哥马里亚斯群岛的珊瑚群落：与东太平洋的结构和生物地理相关性

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Various authors have suggested that the Islas Marias archipelago, Mexico, may play a significant biogeographic role in the dispersal of Indo Pacific coral species into the Eastern Pacific; however, the coral communities of this archipelago have received scarce attention to date. Here, we first addressed coral community structure across the islands and, by employing ordination analysis, minimum spanning tree and particle-tracking experiments, used this information to evaluate the relevance of the archipelago for coral dispersal. Twenty-four coral communities were recorded in the archipelago. Coral cover varied significantly among islands: Maria Cleofas had large values (38.5%), intermediate values were observed for Maria Madre (26.5%) and Maria Magdalena (22.84%), and relatively low values were recorded for San Juanito (18.5%). Coral communities mainly consisted of Pocillopora (57.3%) and Porites (25.5%) species, while species of Pavona (16%) and Psammocora (0.6%) made relatively minor contributions. Thirteen stony coral species were identified in the archipelago; of these Psammocora profundacella and Pavona duerdeni represent new records. Ordination analysis, minimum spanning tree and particle-tracking experiments suggested similar connecting paths in the studied area; in general, the Islas Marias stands as a route for coral dispersal of Indo Pacific species into the Northeastern Pacific. In a regional context, the Islas Marias has three major biogeographic implications to coral dispersal: (i) the archipelago stands as a major stepping stone for the transport of species and individuals among the Revillagigedo archipelago, the Gulf of California and the tropical Mexican Pacific; (ii) the Islas Marias may play a seminal role in maintaining the genetic connectivity between southern and northern coral populations along the Mexican Pacific and (iii) because of its relatively pristine status and low levels of human impact, the archipelago may potentially serve as a source of coral propagules for ecosystem recovery in the Gulf of California and along the Pacific coast of the Mexican mainland following natural and/or human induced perturbations.
机译：许多作者认为，墨西哥的Islas Marias群岛在印度洋太平洋珊瑚物种向东太平洋的扩散中可能起着重要的生物地理作用。然而，迄今为止，该群岛的珊瑚群落很少受到关注。在这里，我们首先讨论了整个岛屿上的珊瑚群落结构，并通过使用排序分析，最小生成树和粒子追踪实验，利用此信息评估了群岛对珊瑚扩散的相关性。在该群岛记录了二十四个珊瑚群落。岛屿之间的珊瑚覆盖率差异很大：Maria Cleofas的价值很高（38.5％），Maria Madre（26.5％）和Maria Magdalena（22.84％）的中间价，而San Juanito（18.5％）的价格相对较低。珊瑚群落主要由Pocillopora（57.3％）和Porites（25.5％）物种组成，而Pavona（16％）和Psammocora（0.6％）物种贡献相对较小。在群岛中发现了13种石质珊瑚物种。这些Psammocora profundacella和Pavona Duerdeni中的新记录。排序分析，最小生成树和粒子跟踪实验表明，研究区域内的连接路径相似。通常，Islas Marias是将印度洋太平洋物种散布到东北太平洋的一条途径。在区域背景下，玛丽亚岛对珊瑚的传播具有三个主要的生物地理意义：（i）群岛是Revillagigedo群岛，加利福尼亚湾和热带墨西哥太平洋之间物种和个人运输的主要垫脚石； （ii）玛利亚群岛可能在维持墨西哥太平洋沿岸南部和北部珊瑚种群之间的遗传联系方面起着开创性的作用，并且（iii）由于其相对原始的地位和对人类的低影响，该群岛可能成为自然和/或人为扰动后，加利福尼亚湾和墨西哥大陆太平洋沿岸生态系统恢复所用的珊瑚繁殖体的来源。

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