The spatial scale of genetic subdivision in populations of Ifremeria nautilei, a hydrothermal-vent gastropod from the southwest Pacific.
The spatial scale of genetic subdivision in populations of Ifremeria nautilei, a hydrothermal-vent gastropod from the southwest Pacific.
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DOI：
10.1186/1471-2148-11-372
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发表时间：
2011-12-22
影响因子：
3.4
通讯作者：
Van Dover CL
中科院分区：
文献类型：
--
作者：
Thaler AD;Zelnio K;Saleu W;Schultz TF;Carlsson J;Cunningham C;Vrijenhoek RC;Van Dover CL
深海热液喷口为依赖化学自养初级生产的专门动物群落提供了零星的、短暂的栖息地。东太平洋热液喷口的人口结构已得到大(数千公里)和小(数百米)空间尺度的研究，而西太平洋热液喷口的人口结构受到的关注有限。这项研究描述了西太平洋洞口受限腹足类Ifremeria nautilei种群之间发生遗传分化的规模。我们使用线粒体和DNA微卫星标记来推断基因流和种群细分的模式。采用了嵌套抽样策略，比较了在一个喷口区域内相隔几米的鹦鹉螺离散斑块的遗传多样性，以及围绕该物种已知范围的弧后盆地之间长达数千公里的距离。在马努斯盆地内的斑块、土丘或地点之间没有检测到遗传细分。虽然来自刘盆地和北斐济盆地(相距约1000公里)的鹦鹉螺也没有表现出遗传分化的证据，但这些种群在遗传上与马努斯盆地种群不同。一种限制当代基因流动的未知过程将鹦鹉螺马努斯盆地种群与占据北斐济和刘盆地的广泛种群隔离开来。在多个空间尺度上对热液喷口种群遗传结构的深入了解界定了自然保护单位，有助于在提出和管理人类活动的情况下最大限度地减少遗传多样性的损失。
Deep-sea hydrothermal vents provide patchy, ephemeral habitats for specialized communities of animals that depend on chemoautotrophic primary production. Unlike eastern Pacific hydrothermal vents, where population structure has been studied at large (thousands of kilometres) and small (hundreds of meters) spatial scales, population structure of western Pacific vents has received limited attention. This study addresses the scale at which genetic differentiation occurs among populations of a western Pacific vent-restricted gastropod, Ifremeria nautilei. We used mitochondrial and DNA microsatellite markers to infer patterns of gene flow and population subdivision. A nested sampling strategy was employed to compare genetic diversity in discrete patches of Ifremeria nautilei separated by a few meters within a single vent field to distances as great as several thousand kilometres between back-arc basins that encompass the known range of the species. No genetic subdivisions were detected among patches, mounds, or sites within Manus Basin. Although I. nautilei from Lau and North Fiji Basins (~1000 km apart) also exhibited no evidence for genetic subdivision, these populations were genetically distinct from the Manus Basin population. An unknown process that restricts contemporary gene flow isolates the Manus Basin population of Ifremeria nautilei from widespread populations that occupy the North Fiji and Lau Basins. A robust understanding of the genetic structure of hydrothermal vent populations at multiple spatial scales defines natural conservation units and can help minimize loss of genetic diversity in situations where human activities are proposed and managed.
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影响因子：
4.9
作者：
Clement, M;Posada, D;Crandall, KA
通讯作者：
Crandall, KA
影响因子：
3.3
作者：
Baker, Patrick;Austin, James D.;Baker, Shirley M.
通讯作者：
Baker, Shirley M.
影响因子：
8.8
作者：
Friedenberg, NA
通讯作者：
Friedenberg, NA
影响因子：
2.6
作者：
Excoffier, Laurent;Laval, Guillaume;Schneider, Stefan
通讯作者：
Schneider, Stefan
影响因子：
1.4
作者：
COHEN, D;LEVIN, SA
通讯作者：
LEVIN, SA