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首页> 美国卫生研究院文献>PLoS Clinical Trials >Population genetic structure of eelgrass (Zostera marina) on the Korean coast: Current status and conservation implications for future management
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Population genetic structure of eelgrass (Zostera marina) on the Korean coast: Current status and conservation implications for future management

机译：韩国沿海鳗草（Zostera marina）的种群遗传结构：现状和保护对未来管理的影响

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Seagrasses provide numerous ecosystem services for coastal and estuarine environments, such as nursery functions, erosion protection, pollution filtration, and carbon sequestration. Zostera marina (common name “eelgrass”) is one of the seagrass bed-forming species distributed widely in the northern hemisphere, including the Korean Peninsula. Recently, however, there has been a drastic decline in the population size of Z. marina worldwide, including Korea. We examined the current population genetic status of this species on the southern coast of Korea by estimating the levels of genetic diversity and genetic structure of 10 geographic populations using eight nuclear microsatellite markers. The level of genetic diversity was found to be significantly lower for populations on Jeju Island [mean allelic richness (AR) = 1.92, clonal diversity (R) = 0.51], which is located approximately 155 km off the southernmost region of the Korean Peninsula, than for those in the South Sea (mean AR = 2.69, R = 0.82), which is on the southern coast of the mainland. South Korean eelgrass populations were substantially genetically divergent from one another (FST = 0.061–0.573), suggesting that limited contemporary gene flow has been taking place among populations. We also found weak but detectable temporal variation in genetic structure within a site over 10 years. In additional depth comparisons, statistically significant genetic differentiation was observed between shallow (or middle) and deep zones in two of three sites tested. Depleted genetic diversity, small effective population sizes (Ne) and limited connectivity for populations on Jeju Island indicate that these populations may be vulnerable to local extinction under changing environmental conditions, especially given that Jeju Island is one of the fastest warming regions around the world. Overall, our work will inform conservation and restoration efforts, including transplantation for eelgrass populations at the southern tip of the Korean Peninsula, for this ecologically important species.
机译：海草为沿海和河口环境提供了众多的生态系统服务，例如苗圃功能，侵蚀保护，污染过滤和碳固存。 Zostera marina（俗称“鳗草”）是在北半球（包括朝鲜半岛）广泛分布的海草床形成物种之一。但是，最近，包括韩国在内的全世界滨海链球菌的人口数量急剧减少。我们使用八种核微卫星标记估算了10个地理种群的遗传多样性和遗传结构，从而检查了该物种在韩国南海岸的当前种群遗传状况。发现济州岛上的种群遗传多样性水平明显较低[平均等位基因丰富度（AR）= 1.92，克隆多样性（R）= 0.51]，该区域位于朝鲜半岛最南端约155公里，比位于大陆南部海岸的南海（平均AR = 2.69，R = 0.82）高。韩国鳗草种群之间的遗传差异很大（FST = 0.061–0.573），这表明当代种群之间的基因流有限。我们还发现在过去10年中某个站点内的遗传结构存在微弱但可检测到的时间变化。在其他深度比较中，在三个测试站点中的两个站点中，在浅（或中）和深区域之间观察到了统计学上显着的遗传分化。遗传资源枯竭，有效人口规模小（Ne）以及济州岛上人口的连通性有限，表明这些人口在环境条件变化的情况下可能易遭受当地灭绝的影响，尤其是鉴于济州岛是世界上变暖最快的地区之一。总的来说，我们的工作将为保护和恢复工作提供信息，包括为朝鲜半岛南端的这一重要生态物种进行鳗草种群移植。

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