The Long and Short of It: Genetic Variation and Population Structure of the Anchialine Atyid Shrimp Caridina rubella on Miyako-Jima, Japan
The Long and Short of It: Genetic Variation and Population Structure of the Anchialine Atyid Shrimp Caridina rubella on Miyako-Jima, Japan
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长与短：日本宫古岛安奇阿林阿泰德虾红贝虾的遗传变异和种群结构
DOI：
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
S. R. Santos
中科院分区：
文献类型：
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作者：
D. Weese;Y. Fujita;M. Hidaka;S. R. Santos
摘要许多岛屿上最受威胁的生态系统之一可能是Anchialine栖息地，即沿海内陆水体，没有与海洋的表面连接，但含有随潮汐波动的微咸水。为了更好地管理这些栖息地，重要的是对它们内部的生物多样性有更广泛的了解，因为这些知识在制定保护战略方面发挥着关键作用。本研究调查了日本琉球群岛南部红尾红虾Caridina Rubella Fujino和Shokita，1975年的遗传变异和种群结构。考虑到浮游生物营养的幼虫阶段及其潜在的两性生活史，宫古岛(显然受到限制)上的风疹弧菌种群被假设为在整个岛上几乎没有结构。为了验证这一点，从四个钩骨洞穴中收集了61个个体，并检测了线粒体DNA(MtDNA)的细胞色素C氧化酶亚基I(COI)区域的序列变异。令人惊讶的是，从20米到10公里的距离都显示出显著的遗传结构。此外，在位置相近但或多或少完全隔离的种群之间发现了与嘴长度明显变异相关的深(∼17%p-距离)遗传差异。这意味着“风疹杆菌”实际上可能代表了宫古岛上的两个不同物种。鉴于风疹隐翅虫已被日本政府列为濒危物种，本文的研究结果对宫古岛风疹隐翅虫种群保护计划的制定和实施具有一定的参考价值。
ABSTRACT One of the most threatened ecosystems on many islands may be anchialine habitats, or coastal land-locked water bodies with no surface connection to the sea yet containing brackish water that fluctuates with the tides. To better manage these habitats, it is important to develop a broader understanding of the biodiversity within them since such knowledge plays critical roles in establishing conservation strategies. In this study, the genetic variation and population structure of an anchialine atyid shrimp, Caridina rubella Fujino and Shokita, 1975 was investigated in the Southern Ryukyu Archipelago, Japan. Given a planktotrophic larval stage and its potential amphidromous life cycle, populations of C. rubella on the island of Miyako-jima (to which it is apparently restricted) were hypothesized to have little to no structure across the island. To test this, 61 individuals were collected from four anchialine caves and sequence variation examined at the cytochrome c oxidase subunit I (COI) region of the mitochondrial DNA (mtDNA). Surprisingly, significant genetic structure was exhibited across distances ranging from <20 m to > 10 km. Additionally, deep (∼17% p-distance) genetic divergence correlating with distinct variation in rostrum lengths was found between closely situated, but more-or-less completely isolated, populations. This implies “C. rubella” may actually represent two distinct species on Miyako-jima. Given that this atyid is already listed as a threatened species by the Japanese government, the results presented here are useful in the formulation and implementation of future conservation plans for populations of C. rubella on Miyako-jima.
影响因子：
3.3
作者：
Yunxin Fu
通讯作者：
Yunxin Fu