Molecular phylogenetics reveals a pattern of biome conservatism in New World anchovies (family Engraulidae)
Molecular phylogenetics reveals a pattern of biome conservatism in New World anchovies (family Engraulidae)
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DOI：
10.1111/j.1420-9101.2012.02464.x
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发表时间：
2012-04-01
影响因子：
2.1
通讯作者：
Lovejoy, N. R.
中科院分区：
文献类型：
--
作者：
Bloom, D. D.;Lovejoy, N. R.
海洋和淡水生物群落之间的进化转变是相对罕见的事件，产生了广泛的模式，生物群落保守主义的水生生物。我们调查了生物群落的转变，在鳀科，全球分布的分支的经济重要的鱼类。大部分的淡水鱼都是近岸海洋鱼类，但也有几种淡水鱼来自南美洲的热带河流，以前被认为是六次或更多次独立淡水入侵的产物。我们产生了一个全面的分子系统发育的鳀科，包括代表15个目前公认的17个属。我们的数据支持以前的假设，更高层次的关系内鳀科，但表明，大多数新世界属不是单系的，需要修订。祖先的性格重建表明，新世界淡水鱼类是一个单一的海洋淡水过渡的产物，支持生物群落保守主义的模式。我们认为，竞争是主要的机制，调节水生生物群落的过渡在大陆范围内。
Evolutionary transitions between marine and freshwater biomes are relatively rare events, yielding a widespread pattern of biome conservatism among aquatic organisms. We investigated biome transitions in anchovies (Engraulidae), a globally distributed clade of economically important fishes. Most anchovy species are near-shore marine fishes, but several exclusively freshwater species are known from tropical rivers of South America and were previously thought to be the product of six or more independent freshwater invasions. We generated a comprehensive molecular phylogeny for Engraulidae, including representatives from 15 of 17 currently recognized genera. Our data support previous hypotheses of higher-level relationships within Engraulidae, but show that most New World genera are not monophyletic and in need of revision. Ancestral character reconstruction reveals that New World freshwater anchovies are the product of a single marine to freshwater transition, supporting a pattern of biome conservatism. We argue that competition is the principal mechanism that regulates aquatic biome transitions on a continental scale.