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首页> 外文期刊>Marine ecology progress series >Reef fish functional composition and metrics reveal spatial differences in three protected islands in the Eastern Pacific
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Reef fish functional composition and metrics reveal spatial differences in three protected islands in the Eastern Pacific

机译：Reef Fish功能组成和指标显示了东太平洋三个受保护岛屿的空间差异

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Reef fish assemblages in the Eastern Pacific (EP) represent an interesting system to understand how areas with lower diversity respond to multiple factors and their effect on ecosystem functions and services. Among the multiple approaches that have emerged, the evaluation of functional metrics provides an initial comprehension of these relationships. In this context, to better understand reef fish variability in the EP, we evaluated spatial differences in ecological metrics, the composition of fish assemblages, and their relationship with habitat structure in coral communities at 3 islands in Mexico (Marietas, Isabel, and Cleof as). To include a functional approach, we created a functional entity (FE) matrix using species abundance and 6 categorical functional traits; specifically, we calculated ecological metrics that reflect the representation or under-representation of species in the functions or FEs (redundancy and vulnerability) and the rarity in FEs and species and their relationship with habitat structure. Overall, most of the fish FEs in the EP were represented by 1 species (i.e. high vulnerability and low functional redundancy). Despite the low redundancy recorded in the islands, reef fish performed multiple key functions; however, many functions remained rare. Furthermore, both metrics and fish composition showed high variability among sites and islands, but this variability was only partially explained by a few variables of habitat structure (i.e. rugosity). These results, in combination with the unique characteristics of coral communities in the EP, highlight the need to identify the drivers of fish assemblages and their effect on the ecosystem processes and services in order to implement unique management strategies for each island.
机译：东太平洋（EP）中的礁鱼组合代表了一个有趣的系统，以了解多样性较低的区域如何应对多种因素及其对生态系统功能和服务的影响。在出现的多种方法中，功能度量的评估提供了对这些关系的初步理解。在这种情况下，为了更好地了解EP中的珊瑚鱼变异性，我们评估了生态指标的空间差异，鱼群的组合，以及与墨西哥的3个岛屿的珊瑚社区中的栖息地结构的关系（玛丽埃塔，伊莎贝尔和Cleof ）。为了包括功能方法，我们使用物种丰度和6个分类功能性状创建了功能实体（FE）矩阵;具体而言，我们计算了反映了物种在职能或FES（冗余和漏洞）中物种的代表性或表示的生态学级以及与FES和物种的罕见以及与栖息地结构的关系。总体而言，EP中的大多数鱼FES由1种（即高漏洞和低函数冗余）表示。尽管岛上记录了低冗余，但珊瑚鱼进行了多个关键功能;然而，许多功能仍然罕见。此外，度量和鱼组合物在位点和岛屿之间显示出高的可变性，但这种可变性仅被几个栖息地结构（即粗糙）的变量部分解释。这些结果与EP中的珊瑚社区的独特特征相结合，突出了识别鱼类组合的驱动程序及其对生态系统流程和服务的影响的需要，以便为每个岛屿实施独特的管理策略。

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