Ecological partitioning and diversity in tropical planktonic foraminifera.
Ecological partitioning and diversity in tropical planktonic foraminifera.
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DOI：
10.1186/1471-2148-12-54
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发表时间：
2012-04-16
影响因子：
3.4
通讯作者：
Wade CM
中科院分区：
文献类型：
--
作者：
Seears HA;Darling KF;Wade CM
生态过程日益被视为海洋环境多样化的一个重要模式，因为海洋上层生物的高度扩散潜力以及基因流动缺乏绝对的障碍，可能会限制通过地理分隔发生异地物种形成。在这里，我们专注于潜在的作用，生态分区的多样化的一个广泛分布的海洋原生生物群，浮游有孔虫。采样是在热带阿拉伯海西南（夏季）季风期间进行的，当时明显的环境条件导致不同的北方和南方水团之间在温度、盐度和生产力方面存在巨大差异。我们发现了广泛的遗传多样性内的阿拉伯海浮游有孔虫，确定13 morphospecies，由20个不同的SSU rRNA遗传类型。几个形态种/遗传类型显示非随机地理分布，分区之间的北方和南方的水团，独立的生态适应的强烈指示。我们建议海面初级生产力的主要因素驱动的地理分离的阿拉伯海浮游有孔虫，在西南季风，共生协会的变化可能发挥作用的具体生态适应观察。我们的研究结果表明，生态分区可能有助于在浮游有孔虫中观察到的高水平“神秘”遗传多样性，并支持生态过程可能在海洋浮游生物多样化中发挥关键作用的观点。
Ecological processes are increasingly being viewed as an important mode of diversification in the marine environment, where the high dispersal potential of pelagic organisms, and a lack of absolute barriers to gene flow may limit the occurrence of allopatric speciation through vicariance. Here we focus on the potential role of ecological partitioning in the diversification of a widely distributed group of marine protists, the planktonic foraminifera. Sampling was conducted in the tropical Arabian Sea, during the southwest (summer) monsoon, when pronounced environmental conditions result in a strong disparity in temperature, salinity and productivity between distinct northern and southern water masses. We uncovered extensive genetic diversity within the Arabian Sea planktonic foraminifera, identifying 13 morphospecies, represented by 20 distinct SSU rRNA genetic types. Several morphospecies/genetic types displayed non-random biogeographical distributions, partitioning between the northern and southern water masses, giving a strong indication of independent ecological adaptations. We propose sea-surface primary productivity as the main factor driving the geographical segregation of Arabian Sea planktonic foraminifera, during the SW monsoon, with variations in symbiotic associations possibly playing a role in the specific ecological adaptations observed. Our findings suggest that ecological partitioning could be contributing to the high levels of 'cryptic' genetic diversity observed within the planktonic foraminifera, and support the view that ecological processes may play a key role in the diversification of marine pelagic organisms.
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DOI：
10.1073/pnas.1001380107
发表时间：
2010-07-20
影响因子：
11.1
作者：
Casteleyn, Griet;Leliaert, Frederik;Vyverman, Wim
通讯作者：
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影响因子：
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10.1073/pnas.0700520104
发表时间：
2007-03-20
影响因子：
11.1
作者：
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通讯作者：
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DOI：
10.1073/pnas.0902827106
发表时间：
2009-08-04
影响因子：
11.1
作者：
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