Connectivity in the cold: the comparative population genetics of vent‐endemic fauna in the Scotia Sea, Southern Ocean
Connectivity in the cold: the comparative population genetics of vent‐endemic fauna in the Scotia Sea, Southern Ocean
复制标题
寒冷中的连通性：南大洋斯科舍海喷口特有动物群的比较群体遗传学
DOI：
10.1111/mec.13541
复制
发表时间：
2016
影响因子：
4.9
通讯作者：
A. Rogers
中科院分区：
文献类型：
--
作者：
C. N. Roterman;J. Copley;K. Linse;P. Tyler;A. Rogers
我们报告的第一个比较人口遗传学研究喷口动物在南大洋使用细胞色素C氧化酶I和微卫星标记。检查了三个物种：kiwaidsquat龙虾，kiwatyleri，盾螺腹足类，Gigantopeltachesoia，和Lepetodrilid帽贝，Lepetodrilussp.，从东斯科舍海岭（ESR）上相距440 km的喷口区和向东约95 km的南桑威奇岛弧上的肯普火山口采集。我们报告没有分化的所有物种在整个ESR，符合panmixia或最近的范围扩大。一个缺乏分化是值得注意的Kiwa tyleri，表现出极其简短的lecithotrophic幼虫发育，一个非常有限的扩散范围暗示。然而，在南大洋，低温诱导的代谢率降低可能会延长幼虫的寿命，从而减弱扩散策略对种群结构模式的影响。COI多样性模式表明，在过去的百万年中，所有物种都经历了人口瓶颈或选择性扫荡，可能在不同的时间。ESR和肯普帽贝是不同的，虽然有证据表明最近的ESR肯普移民。它们的分歧，可能表明初期的物种形成，沿着与其他两个物种的情况下，在肯普，可能是不同的扩散能力的结果在一个~1000米的深度范围和/或不同的选择制度之间的两个地区。ESR和肯普之间的历史和近期帽贝基因流的估计与主要的东风一致，因此可能与ESR上的横轴电流一致，对该地区具有地理意义。
We report the first comparative population genetics study for vent fauna in the Southern Ocean using cytochrome C oxidase I and microsatellite markers. Three species are examined: the kiwaid squat lobster, Kiwa tyleri, the peltospirid gastropod, Gigantopelta chessoia, and a lepetodrilid limpet, Lepetodrilus sp., collected from vent fields 440 km apart on the East Scotia Ridge (ESR) and from the Kemp Caldera on the South Sandwich Island Arc, ~95 km eastwards. We report no differentiation for all species across the ESR, consistent with panmixia or recent range expansions. A lack of differentiation is notable for Kiwa tyleri, which exhibits extremely abbreviated lecithotrophic larval development, suggestive of a very limited dispersal range. Larval lifespans may, however, be extended by low temperature‐induced metabolic rate reduction in the Southern Ocean, muting the impact of dispersal strategy on patterns of population structure. COI diversity patterns suggest all species experienced demographic bottlenecks or selective sweeps in the past million years and possibly at different times. ESR and Kemp limpets are divergent, although with evidence of very recent ESR‐Kemp immigration. Their divergence, possibility indicative of incipient speciation, along with the absence of the other two species at Kemp, may be the consequence of differing dispersal capabilities across a ~1000 m depth range and/or different selective regimes between the two areas. Estimates of historic and recent limpet gene flow between the ESR and Kemp are consistent with predominantly easterly currents and potentially therefore, cross‐axis currents on the ESR, with biogeographic implications for the region.
登录
查看更多内容
影响因子：
10.7
作者：
Hey, Jody
通讯作者：
Hey, Jody
影响因子：
1.2
作者：
Chen, Chong;Linse, Katrin;Rogers, Alex D.
通讯作者：
Rogers, Alex D.
DOI：
10.1093/oxfordjournals.jhered.a023106
发表时间：
1997-07
期刊：
The Journal of heredity
影响因子：
--
作者：
R. Vrijenhoek
通讯作者：
R. Vrijenhoek
影响因子：
3.3
作者：
G. Wilson;B. Rannala
通讯作者：
G. Wilson;B. Rannala
DOI：
10.1016/j.dsr2.2013.01.028
发表时间：
2013-08-01
影响因子：
3
作者：
Amon, Diva J.;Glover, Adrian G.;Copley, Jonathan T.
通讯作者：
Copley, Jonathan T.