Dispersal in the sub-Antarctic: king penguins show remarkably little population genetic differentiation across their range.
Dispersal in the sub-Antarctic: king penguins show remarkably little population genetic differentiation across their range.
复制标题
DOI：
10.1186/s12862-016-0784-z
复制
发表时间：
2016-10-13
影响因子：
3.4
通讯作者：
Hart T
中科院分区：
文献类型：
--
作者：
Clucas GV;Younger JL;Kao D;Rogers AD;Handley J;Miller GD;Jouventin P;Nolan P;Gharbi K;Miller KJ;Hart T
海鸟是海洋生态系统的重要组成部分，既是捕食者，也是生态变化的指示者，对猎物丰度的变化非常敏感。为了确定种群规模的波动是局部的还是大规模生态系统变化的标志，我们必须首先了解种群结构和扩散。王企鹅是长寿的海鸟，在靠近极地前沿的亚南极地区占据了一席之地。殖民地在开发、人口恢复和扩张方面有着非常不同的历史。我们研究了王企鹅的遗传种群结构和殖民模式，在他们目前的范围内使用的数据集5154个未连接的，高覆盖率的单核苷酸多态性通过限制性位点相关DNA测序（RADSeq）。尽管在少数离散的，地理上分开的地点繁殖，但我们发现在数千公里的开阔海洋中分离的殖民地之间只有非常轻微的遗传差异，这表明岛屿和群岛之间的迁移可能很常见。我们的研究结果表明，南格鲁吉亚人口略有区别于所有其他殖民地，并建议最近成立的福克兰群岛殖民地很可能已经建立了从遥远的克罗泽群岛，而不是附近的南格鲁吉亚殖民地的移民，可能是由于密度依赖过程。在未来的物种保护规划和监测中，必须考虑到王企鹅群体之间观察到的微妙差异，试图预测大规模气候变化导致灭绝风险的人口模型必须考虑到迁徙。迁移可能会缓冲王企鹅对气候变化的一些影响，殖民地出现panmictic，虽然它不太可能完全保护他们，因为他们的南大洋觅食地预计会发生广泛的物理变化。总体而言，对整个南大洋海洋捕食者的大规模种群遗传研究揭示了比以前想象的更多的相互联系和迁移。本文的在线版本（doi：10.1186/s12862-016-0784-z）包含补充材料，可供授权用户使用。
Seabirds are important components of marine ecosystems, both as predators and as indicators of ecological change, being conspicuous and sensitive to changes in prey abundance. To determine whether fluctuations in population sizes are localised or indicative of large-scale ecosystem change, we must first understand population structure and dispersal. King penguins are long-lived seabirds that occupy a niche across the sub-Antarctic zone close to the Polar Front. Colonies have very different histories of exploitation, population recovery, and expansion. We investigated the genetic population structure and patterns of colonisation of king penguins across their current range using a dataset of 5154 unlinked, high-coverage single nucleotide polymorphisms generated via restriction site associated DNA sequencing (RADSeq). Despite breeding at a small number of discrete, geographically separate sites, we find only very slight genetic differentiation among colonies separated by thousands of kilometers of open-ocean, suggesting migration among islands and archipelagos may be common. Our results show that the South Georgia population is slightly differentiated from all other colonies and suggest that the recently founded Falkland Island colony is likely to have been established by migrants from the distant Crozet Islands rather than nearby colonies on South Georgia, possibly as a result of density-dependent processes. The observed subtle differentiation among king penguin colonies must be considered in future conservation planning and monitoring of the species, and demographic models that attempt to forecast extinction risk in response to large-scale climate change must take into account migration. It is possible that migration could buffer king penguins against some of the impacts of climate change where colonies appear panmictic, although it is unlikely to protect them completely given the widespread physical changes projected for their Southern Ocean foraging grounds. Overall, large-scale population genetic studies of marine predators across the Southern Ocean are revealing more interconnection and migration than previously supposed. The online version of this article (doi:10.1186/s12862-016-0784-z) contains supplementary material, which is available to authorized users.
登录
查看更多内容
影响因子：
3.7
作者：
Baird NA;Etter PD;Atwood TS;Currey MC;Shiver AL;Lewis ZA;Selker EU;Cresko WA;Johnson EA
通讯作者：
Johnson EA
影响因子：
1.7
作者：
Freer, Jennifer J.;Mable, Barbara K.;Hart, Tom
通讯作者：
Hart, Tom
影响因子：
2.5
作者：
Charrassin, JB;Bost, CA
通讯作者：
Bost, CA
影响因子：
3.3
作者：
Foll, Matthieu;Gaggiotti, Oscar
通讯作者：
Gaggiotti, Oscar
影响因子：
3.7
作者：
Carvajal-Rodriguez A;de Uña-Alvarez J
通讯作者：
de Uña-Alvarez J