SPECIATION IN NORTH AMERICAN BLACK BASSES, MICROPTERUS (ACTINOPTERYGII: CENTRARCHIDAE)
SPECIATION IN NORTH AMERICAN BLACK BASSES, MICROPTERUS (ACTINOPTERYGII: CENTRARCHIDAE)
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北美黑鲈、小鳍鱼的物种（ACTINOPTERYGII：CENTRARCHIDAE）
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
D. Philipp
中科院分区：
文献类型：
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作者：
T. Near;T. Kassler;J. Koppelman;C. B. Dillman;D. Philipp
摘要更新世是温带大陆生物多样性的重要时期。要严格评估更新世冰川作用的淡水鱼分支Micropterus的演变，我们使用完整的基因序列从两个线粒体基因（细胞色素B和ND 2）的系统发育分析，和化石校准的分子钟，估计年龄的物种形成事件和多样化的速度。在墨西哥湾的北美支流的8个物种中有5个物种没有大量的形态和生态分歧以及特有性，可以解释为这些物种最近更新世起源的结果。Micropterus的物种形成年代介于1.01 ± 0.32至11.17 ± 1.02百万年前。只有一个物种形成事件的日期是更新世，和多样化率是没有显着的变化在Micropterus。更新世是Micropterus物种形成的一个特殊时期的前提是不支持的。相反，墨西哥湾沿岸异域物种形成模型，并预测在晚中新世和上新世的海平面波动驱动的动态物种形成的时期。更新世，然而，是一个重要的种内线粒体谱系多样化的时期。墨西哥湾沿岸异域物种形成模型的应用，在北美墨西哥湾沿岸的剩余水生动物将依赖于强大的系统发育假说和准确的年龄估计的物种形成事件。
Abstract The Pleistocene Epoch has been frequently cited as a period of intense speciation for a significant portion of temperate continental biotas. To critically assess the role of Pleistocene glaciations on the evolution of the freshwater fish clade Micropterus, we use a phylogenetic analysis of complete gene sequences from two mitochondrial genes (cytochrome b and ND2), and a fossil calibration of the molecular clock to estimate ages of speciation events and rates of diversification. The absence of substantial morphological and ecological divergence together with endemism of five of the eight species in North American tributaries of the Gulf of Mexico may be interpreted as the result of a recent Pleistocene origin for these species. Speciation dates in Micropterus range from 1.01 ± 0.32 to 11.17 ± 1.02 million years ago. Only one speciation event is dated to the Pleistocene, and rates of diversification are not significantly variable in Micropterus. The premise that the Pleistocene was an exceptional period of speciation in Micropterus is not supported. Instead, a Gulf Coast allopatric speciation model is proposed, and predicts periods of dynamic speciation driven by sea level fluctuations in the Late Miocene and Pliocene. The Pleistocene, however, was a period of significant intraspecific mitochondrial lineage diversification. The application of the Gulf Coast allopatric speciation model to the remaining aquatic fauna of the Gulf of Mexico coast in North America will rely on robust phylogenetic hypotheses and accurate age estimations of speciation events.