Driving south: a multi-gene phylogeny of the brown algal family Fucaceae reveals relationships and recent drivers of a marine radiation.
Driving south: a multi-gene phylogeny of the brown algal family Fucaceae reveals relationships and recent drivers of a marine radiation.
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DOI：
10.1186/1471-2148-11-371
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发表时间：
2011-12-21
影响因子：
3.4
通讯作者：
Pearson GA
中科院分区：
文献类型：
--
作者：
Cánovas FG;Mota CF;Serrão EA;Pearson GA
由于扩散边界的性质不明确，了解驱动海洋生态系统物种形成的过程直到最近仍然是一个挑战。然而，最近关于海洋适应性辐射和生态物种形成的证据，以及以前未被发现的神秘物种形成模式正在推翻这一观点。在这里，我们使用多基因系统发育学来推断墨角藻科（北太平洋和大西洋的潮间带褐藻）的科水平进化史，以研究大西洋墨角藻属近期和独特的辐射物种形成模式，与主要单一特异性的现存属相比。我们根据 EST 文库的多态性 cDNA，从 13 个蛋白质编码基因中开发了一组标记，这提供了新颖的分辨率，可以估计祖先特征状态并详细重建最近的辐射历史。系统发育重建产生了相似的拓扑结构，并揭示了墨角藻科谱系的四次独立的跨北极殖民事件，其中两次还涉及与大西洋入侵相关的从雌雄同体到雌雄异株的转变。最近，墨角藻属中发生了雌雄同体的祖先谱系向雌雄同体的逆转，特别是与更极端的栖息地的殖民化同时发生。墨角藻属的新谱系也被发现与南部栖息地有关。这些最近的物种形成事件发生在更新世冰川作用期间，与自交交配系统的转变同时发生，通常是分布向南移动，以及新栖息地的入侵。该家族的多样化发生在中新世晚期，至少有四次独立的跨北极谱系杂交与两次生殖模式转变同时发生。墨角藻属出现于上新世，但在大约 250 万年前的相对较短的时间内辐射出去。目前墨角藻属的物种分布表明，气候因素促进了两个主要分支之间的分化，而更新世冰川周期期间温带分支中近期和快速的物种辐射与几个潜在的物种形成驱动因素相一致。
Understanding the processes driving speciation in marine ecosystems remained a challenge until recently, due to the unclear nature of dispersal boundaries. However, recent evidence for marine adaptive radiations and ecological speciation, as well as previously undetected patterns of cryptic speciation is overturning this view. Here, we use multi-gene phylogenetics to infer the family-level evolutionary history of Fucaceae (intertidal brown algae of the northern Pacific and Atlantic) in order to investigate recent and unique patterns of radiative speciation in the genus Fucus in the Atlantic, in contrast with the mainly monospecific extant genera. We developed a set of markers from 13 protein coding genes based on polymorphic cDNA from EST libraries, which provided novel resolution allowing estimation of ancestral character states and a detailed reconstruction of the recent radiative history. Phylogenetic reconstructions yielded similar topologies and revealed four independent trans-Arctic colonization events by Fucaceae lineages, two of which also involved transitions from hermaphroditism to dioecy associated with Atlantic invasions. More recently, reversion of dioecious ancestral lineages towards hermaphroditism has occurred in the genus Fucus, particularly coinciding with colonization of more extreme habitats. Novel lineages in the genus Fucus were also revealed in association with southern habitats. These most recent speciation events occurred during the Pleistocene glaciations and coincided with a shift towards selfing mating systems, generally southward shifts in distribution, and invasion of novel habitats. Diversification of the family occurred in the Late-Mid Miocene, with at least four independent trans-Artic lineage crossings coincident with two reproductive mode transitions. The genus Fucus arose in the Pliocene but radiated within a relatively short time frame about 2.5 million years ago. Current species distributions of Fucus suggest that climatic factors promoted differentiation between the two major clades, while the recent and rapid species radiation in the temperate clade during Pleistocene glacial cycles coincided with several potential speciation drivers.
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影响因子：
1.6
作者：
Cho, Ga Youn;Rousseau, Florence;Boo, Sung Min
通讯作者：
Boo, Sung Min
DOI：
10.1016/s0031-0182(02)00249-3
发表时间：
2002-07-20
影响因子：
3
作者：
Gladenkov, AY;Oleinik, AE;Barinov, KB
通讯作者：
Barinov, KB
影响因子：
3.3
作者：
BREMER, K
通讯作者：
BREMER, K
影响因子：
2.4
作者：
Billard, E;Serrao, EA;Valero, M
通讯作者：
Valero, M
影响因子：
4.1
作者：
Coyer, J. A.;Hoarau, G.;Olsen, J. L.
通讯作者：
Olsen, J. L.