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首页> 外文期刊>Marine biology >Shifts in coral clonality along a gradient of disturbance: insights on reproduction and dispersal of Pocillopora acuta
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Shifts in coral clonality along a gradient of disturbance: insights on reproduction and dispersal of Pocillopora acuta

机译：沿着干扰梯度的珊瑚克隆性转移：对皮卡罗巴酸的繁殖和分散的见解

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摘要

Pocillopora acuta, formerly synonymized with P. damicornis, is an ecologically important reef-building coral that exhibits mixed reproductive modes, geographic variation in clonality, and conflicting reports of population genetic structure. Using 16 polymorphic microsatellite loci, this study examined clonality, genetic differentiation, and connectivity of genetically identified P. acuta (n=428) in the Bolinao-Anda Reef Complex (BARC), Philippines, characterized by varying levels of wave exposure. Estimates of clonal richness indicate that the populations are largely derived from asexual reproduction, more likely via dispersal of ameiotic larvae. Clonal richness, population density, and mean colony size vary with wave exposure, suggesting the potential influence of local-scale disturbance on clonality, reproductive mode, and population structure. Populations in low-energy environments were characterized by greater colony density, larger colonies, and a greater proportion of clones compared to high-energy environments. Despite evidence for realized clonal dispersal of P. acuta extending up to 22 km, significant genetic differentiation among BARC populations reveals restricted gene flow at small spatial scales. Moreover, genetic differentiation is more pronounced when considering the spatial distribution of clones (F-ST including clones=0.059; F-ST excluding clones=0.028), suggesting that (1) asexually produced propagules are likely retained locally and across-site settlement is not as common; and (2) sexually derived propagules may have broader scales of dispersal. This study reexamines the population genetics of this often-problematic coral and underlines the importance of contextualizing site and species biology in designing or enhancing management towards the maintenance of functional genetic diversity and pathways of connectivity among populations.
机译：鹿角蚧，以前与P. damicornis异名，是一种重要的生态造礁珊瑚的是表现出混合繁殖方式，在克隆性地理变异，和群体遗传结构的矛盾的报告。使用16多态微卫星位点，本研究检测了博利瑙-安达礁络合物（BARC），菲，其特征在于波曝光的不同水平的克隆性，遗传分化和基因鉴定P.蚧（N = 428）的连接性。克隆丰富的估计表明，群体主要来自无形的繁殖，更可能通过植物幼虫的分散。克隆性丰富，人口密度和平均殖民地大小随波暴露而变化，暗示局部规模扰动对克隆，生殖模式和人口结构的潜在影响。与高能环境相比，低能量环境中的群体的群体密度更大，殖民地和更大比例的克隆。尽管持续高达22公里的P. Acuta的实现克隆分散的证据，但Barc种群的显着遗传分化揭示了小空间尺度的限制基因流动。此外，考虑克隆的空间分布时的遗传分化是更明显（F-ST包括克隆= 0.059; F-ST不含克隆= 0.028），这表明（1）无性繁殖出的繁殖有可能局部地保留和跨站点结算是不那么常见; （2）性衍生的宣传可能具有更广泛的分散尺度。本研究重新审视了这种经常有问题的珊瑚的群体遗传学，并强调了语境化现场和物种生物学在设计或增强了群体的常用遗传多样性和群体之间的途径方面的重要性。

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  • 来源
    《Marine biology》 |2020年第11期|161.1-161.18|共18页
  • 作者

    Torres Andrew F.; Forsman Zac H.; Ravago-Gotanco Rachel;

  • 作者单位

    Univ Philippines Diliman Marine Sci Inst Quezon City 1101 Philippines;

    Univ Hawaii Manoa Hawaii Inst Marine Biol Kaneohe HI 96744 USA;

    Univ Philippines Diliman Marine Sci Inst Quezon City 1101 Philippines;

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