Longitudinal differentiation among pelagic populations in a planktic foraminifer.
Longitudinal differentiation among pelagic populations in a planktic foraminifer.
复制标题
DOI：
10.1002/ece3.286
复制
发表时间：
2012-07
影响因子：
2.6
通讯作者：
de Vargas, Colomban
中科院分区：
文献类型：
--
作者：
Ujiie, Yurika;Asami, Takahiro;de Garidel-Thoron, Thibault;Liu, Hui;Ishitani, Yoshiyuki;de Vargas, Colomban
海洋浮游生物的进化过程被认为依赖于海洋环流系统，该系统在海洋表层水域的种群之间运输浮游生物。在没有混杂的海洋环境影响的情况下，沿纵向梯度的洋流促进的基因流动可能有效地阻碍中上层种群的遗传分化。然而，人们对洋流如何影响浮游生物的地理分布和扩散却知之甚少。我们利用部分小亚基核糖体 DNA (SSU rDNA) 序列研究了印度太平洋暖池 (IPWP) 中浮游有孔虫 Pulleniatina obliquiloculata 的系统发育地理学。我们发现 IPWP 区域三种不同遗传类型的频率存在纵向趋势。这些频率与 IPWP 中三个水团特征的环境因素相关。值得注意的是，尽管个体是通过洋流迁移的，但居住在 IPWP 的太平洋和印度一侧纵向遥远的水团中的种群在基因上是不同的。这些结果表明，同一气候区内不同水团的中上层浮游生物种群在遗传上存在差异。海洋环流系统的变化可能影响远洋浮游生物的扩散和分化的地理模式。
Evolutionary processes in marine plankton have been assumed to be dependent on the oceanic circulation system, which transports plankton between populations in marine surface waters. Gene flow facilitated by oceanic currents along longitudinal gradients may efficiently impede genetic differentiation of pelagic populations in the absence of confounding marine environmental effects. However, how responsible oceanic currents are for the geographic distribution and dispersal of plankton is poorly understood. We examined the phylogeography of the planktic foraminifer Pulleniatina obliquiloculata in the Indo-Pacific Warm Pool (IPWP) by using partial small subunit ribosomal DNA (SSU rDNA) sequences. We found longitudinal clines in the frequencies of three distinct genetic types in the IPWP area. These frequencies were correlated with environmental factors that are characteristic of three water masses in the IPWP. Noteworthy, populations inhabiting longitudinally distant water masses at the Pacific and Indian sides of the IPWP were genetically different, despite transportation of individuals via oceanic currents. These results demonstrate that populations of pelagic plankton have diverged genetically among different water masses within a single climate zone. Changes of the oceanic circulation system could have impacted the geographic patterns of dispersal and divergence of pelagic plankton.
登录
查看更多内容
影响因子：
5.8
作者：
Newton, Alicia;Thunell, Robert;Stott, Lowell
通讯作者：
Stott, Lowell
影响因子：
2.4
作者：
Duda, TF;Palumbi, SR
通讯作者：
Palumbi, SR
影响因子：
--
作者：
Darling, KF;Wade, CM;Bijma, J
通讯作者：
Bijma, J
影响因子：
--
作者：
Darling, KF;Kucera, M;Pak, D
通讯作者：
Pak, D
DOI：
10.1073/pnas.0700520104
发表时间：
2007-03-20
影响因子：
11.1
作者：
Darling, Kate F.;Kucera, Michal;Wade, Christopher M.
通讯作者：
Wade, Christopher M.