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首页> 外文期刊>Marine ecology >Fine-scale phylogeography reveals cryptic biodiversity in Pederson's cleaner shrimp, Ancylomenes pedersoni (Crustacea: Caridea: Palaemonidae), along the Florida Reef Tract
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Fine-scale phylogeography reveals cryptic biodiversity in Pederson's cleaner shrimp, Ancylomenes pedersoni (Crustacea: Caridea: Palaemonidae), along the Florida Reef Tract

机译：精细的系统地理学揭示了佩德森的清洁虾，Ancylomenes pedersoni（甲壳纲：Caridea：Palaemonidae）沿佛罗里达礁岩带的神秘生物多样性。

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摘要

Populations of continuously distributed marine organisms that disperse via pelagic larvae are often assumed to exist in a state of genetic panmixia because of their potential ability for long-distance dispersal. However, obligate symbionts may have more restricted gene flow due to recruitment limitations, making host specificity an important potential driver of biodiversity. To explore the tension between broad dispersal ability and limited recruitment potential, we used sequences of mtDNA cytochrome c oxidase subunit I (COI) to assess the fine-scale phylogeography of the cleaner shrimp, Ancylomenes pedersoni, an obligate symbiont of sea anemones, along 300 km of the Florida Reef Tract (FRT). The results indicate high genetic diversity within A. pedersoni populations along the FRT. Pair-wise phi(ST) values indicate significant genetic structuring between northern (Fort Lauderdale and Upper Keys) and southwestern (Lower Keys) populations, with significant isolation by distance. Two divergent COI haplotype lineages were detected through statistical parsimony analysis: one evenly distributed across the entire FRT (Clade 1) and one found primarily in two sample localities in the Lower Keys (Clade 2). Phylogenetic analyses using 16S-rDNA indicates that this genetic diversity is of paraphyletic origin, and possibly the result of multiple colonization events. These results reveal a complex demographic and evolutionary history for A. pedersoni populations and provide the first evidence of highly divergent intra-specific lineages independently colonizing the FRT. Because the FRT is a highly impacted coral reef system, understanding phylogeographic patterns along it has value beyond documentation of the factors that generate genetic diversity in tropical reef systems: these data are critical for creating scientifically based management strategies.
机译：通过上层幼虫扩散的连续分布的海洋生物种群由于其长距离扩散的潜在能力，通常被认为处于遗传大混杂的状态。然而，由于募集限制，专性共生体可能具有更多受限制的基因流，使宿主特异性成为生物多样性的重要潜在驱动力。为了探索广泛的分散能力和有限的募集潜力之间的张力，我们使用了线粒体DNA细胞色素C氧化酶亚基I（COI）的序列来评估清洁虾虾Ancylomenes pedersoni的精细系统学，这是海葵的专性共生体，共300条佛罗里达礁石道（FRT）的公里数。结果表明，沿FRT的A.pedersoni种群具有高度的遗传多样性。成对的phi（ST）值表明北部（劳德代尔堡和上Keys）人口与西南（Lower Keys）人口之间具有显着的遗传结构，并且距离之间存在显着隔离。通过统计简约分析检测到两种不同的COI单倍体谱系：一种在整个FRT中均匀分布（第1类），一种主要在下键的两个样本区域中发现（第2类）。使用16S-rDNA进行的系统进化分析表明，这种遗传多样性是副生的起源，可能是多重定殖事件的结果。这些结果揭示了A.pedersoni种群的复杂的人口统计和进化史，并提供了独立定居FRT的种内种系高度不同的第一个证据。由于FRT是一个受到严重影响的珊瑚礁系统，因此，了解其沿线的植物地理学模式的价值超出了证明热带礁石系统中产生遗传多样性的因素的文献记载：这些数据对于创建基于科学的管理策略至关重要。

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