Phylogeography of the tropical planktonic foraminifera lineage globigerinella reveals isolation inconsistent with passive dispersal by ocean currents.
Phylogeography of the tropical planktonic foraminifera lineage globigerinella reveals isolation inconsistent with passive dispersal by ocean currents.
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DOI：
10.1371/journal.pone.0092148
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Grimm GW
中科院分区：
文献类型：
--
作者：
Weiner AK;Weinkauf MF;Kurasawa A;Darling KF;Kucera M;Grimm GW
海洋浮游生物的形态学物种通常具有相当程度的隐秘多样性。由于许多形态种表现出世界性分布，因此在遗传多样性水平上了解生物地理和进化过程需要全球采样。我们使用包含 387 个浮游有孔虫 Globigerinella SSU rDNA 单样本序列的数据库作为模型，评估全球范围内海洋微型浮游生物隐秘多样性的生物地理学和系统发育分布。我们的数据证实了多个、分离良好的遗传谱系的存在。对它们的丰度和分布的分析表明，我们的采样可能接近实际的总多样性。出乎意料的是，我们观察到系统发育谱系之间隐秘多样性的分配不均匀。我们证明这种模式既不是采样强度的伪影，也不是谱系年龄的函数。相反，我们认为它反映了三个主要谱系之一正在进行的物种形成过程。令人惊讶的是，高度多样化谱系中的六种遗传类型中有四种在生物地理上仅限于印度太平洋地区。它们的相互共现和层次系统发育结构没有提供任何证据表明它们的起源是通过突然的栖息地破碎而产生的，而且它们仅限于印度太平洋地区，这挑战了暖水省内全球基因流动的观点。这一现象表明被动扩散不足以描述浮游生物多样性的分布。相反，这些生物体表现出由物种相互作用形成的差异化分布模式，并反映了具有独特的多样化率历史的系统发育偶然性。
Morphologically defined species of marine plankton often harbor a considerable level of cryptic diversity. Since many morphospecies show cosmopolitan distribution, an understanding of biogeographic and evolutionary processes at the level of genetic diversity requires global sampling. We use a database of 387 single-specimen sequences of the SSU rDNA of the planktonic foraminifera Globigerinella as a model to assess the biogeographic and phylogenetic distributions of cryptic diversity in marine microplankton on a global scale. Our data confirm the existence of multiple, well isolated genetic lineages. An analysis of their abundance and distribution indicates that our sampling is likely to approximate the actual total diversity. Unexpectedly, we observe an uneven allocation of cryptic diversity among the phylogenetic lineages. We show that this pattern is neither an artifact of sampling intensity nor a function of lineage age. Instead, we argue that it reflects an ongoing speciation process in one of the three major lineages. Surprisingly, four of the six genetic types in the hyperdiverse lineage are biogeographically restricted to the Indopacific. Their mutual co-occurrence and their hierarchical phylogenetic structure provide no evidence for an origin through sudden habitat fragmentation and their limitation to the Indopacific challenges the view of a global gene flow within the warm-water provinces. This phenomenon shows that passive dispersal is not sufficient to describe the distribution of plankton diversity. Rather, these organisms show differentiated distribution patterns shaped by species interactions and reflecting phylogenetic contingency with unique histories of diversification rates.
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影响因子：
1.1
作者：
Holzmann, M;Pawlowski, J
通讯作者：
Pawlowski, J
影响因子：
2.6
作者：
Goetze, Erica
通讯作者：
Goetze, Erica
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.
DOI：
10.1016/j.jembe.2011.05.011
发表时间：
2011-07-31
影响因子：
2
作者：
Blanco-Bercial, Leocadio;Alvarez-Marques, Florentina;Bucklin, Ann
通讯作者：
Bucklin, Ann
DOI：
10.1073/pnas.96.6.2864
发表时间：
1999-03-16
影响因子：
11.1
作者：
de Vargas, C;Norris, R;Pawlowski, J
通讯作者：
Pawlowski, J