Killer whale nuclear genome and mtDNA reveal widespread population bottleneck during the last glacial maximum.
Killer whale nuclear genome and mtDNA reveal widespread population bottleneck during the last glacial maximum.
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DOI：
10.1093/molbev/msu058
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发表时间：
2014-05
影响因子：
10.7
通讯作者：
Hoelzel AR
中科院分区：
文献类型：
--
作者：
Moura AE;Janse van Rensburg C;Pilot M;Tehrani A;Best PB;Thornton M;Plön S;de Bruyn PJ;Worley KC;Gibbs RA;Dahlheim ME;Hoelzel AR
生态系统的功能和恢复力是由单个物种的相互作用和独立贡献决定的。顶端捕食者通过其对被捕食物种动态的影响和依赖发挥了不成比例的决定性作用。因此，它们的人口波动很可能反映出它们各自的生态群落和生境的变化。在此，我们基于北半球核基因组草图数据和全球mtDNA数据，研究了虎鲸的历史种群动态。我们推断在更新世的大部分时间里，种群规模相对稳定，随后在魏奇塞利冰期出现了一个数量级的下降和瓶颈。全球mtDNA数据表明，虽然大多数种群数量下降，但至少有一种种群在非洲南部一个稳定、多产的生态系统中保持了多样性。我们得出的结论是，末次冰期的环境变化促进了一种顶级海洋捕食者的减少，这些事件促成了现存种群的多样性模式，而目前在南非附近高产、稳定的栖息地中种群的相对较高的多样性表明，海洋生产力在这种广泛的下降中发挥了作用。
Ecosystem function and resilience is determined by the interactions and independent contributions of individual species. Apex predators play a disproportionately determinant role through their influence and dependence on the dynamics of prey species. Their demographic fluctuations are thus likely to reflect changes in their respective ecological communities and habitat. Here, we investigate the historical population dynamics of the killer whale based on draft nuclear genome data for the Northern Hemisphere and mtDNA data worldwide. We infer a relatively stable population size throughout most of the Pleistocene, followed by an order of magnitude decline and bottleneck during the Weichselian glacial period. Global mtDNA data indicate that while most populations declined, at least one population retained diversity in a stable, productive ecosystem off southern Africa. We conclude that environmental changes during the last glacial period promoted the decline of a top ocean predator, that these events contributed to the pattern of diversity among extant populations, and that the relatively high diversity of a population currently in productive, stable habitat off South Africa suggests a role for ocean productivity in the widespread decline.
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影响因子：
4.5
作者：
de Bruyn M;Hall BL;Chauke LF;Baroni C;Koch PL;Hoelzel AR
通讯作者：
Hoelzel AR
影响因子：
30.7
作者：
Hazen, Elliott L.;Jorgensen, Salvador;Block, Barbara A.
通讯作者：
Block, Barbara A.
影响因子：
5.8
作者：
Etourneau, Johan;Martinez, Philippe;Schneider, Ralph
通讯作者：
Schneider, Ralph
影响因子：
2.6
作者：
Excoffier, Laurent;Laval, Guillaume;Schneider, Stefan
通讯作者：
Schneider, Stefan
DOI：
10.1073/pnas.0810635106
发表时间：
2009-03-03
影响因子：
11.1
作者：
Fraser, Ceridwen I.;Nikula, Raisa;Waters, Jonathan M.
通讯作者：
Waters, Jonathan M.