Phylogeography and Taxonomic Revision of the Pen Shell Atrina pectinata Species Complex in the South China Sea
Phylogeography and Taxonomic Revision of the Pen Shell Atrina pectinata Species Complex in the South China Sea
复制标题
DOI：
10.3389/fmars.2021.753553
复制
发表时间：
2021-10
期刊：
影响因子：
--
通讯作者：
D. Xue;Haiyan Wang;Tao Zhang
中科院分区：
文献类型：
--
作者：
D. Xue;Haiyan Wang;Tao Zhang
系统地理学研究有助于解决有关物种内部和物种之间的地理格局和进化情景的问题，也有助于阐明广泛分布的物种复合体的分类地位。笔壳双壳贝是西北太平洋地区广泛分布的一种具有重要经济价值的双壳贝。以往的系统地理学研究已经在中国沿海的A. pectinata种复群中发现了4个遗传差异明显的隐种，其中3个隐种分布在南海。然而，很少注意它们的识别和划界。本文利用线粒体细胞色素氧化酶I （COI）、16S核糖体RNA （16S rRNA）和核28S核糖体RNA （28S rRNA）基因标记的DNA序列数据，报道了南海A. pectinata物种复合体的系统地理和分类修正。结合系统发育和基于dna的物种划分分析方法，我们发现在a . pectinata物种复合中有4个遗传有效的物种，并根据我们的结果和先前的形态学和遗传学研究将它们定义为a . japonica, a . lischkeana, Atrina sp.和a . pectinata。人口统计学历史分析表明，南海的这三个物种的种群在一段时间内都相对稳定，然后在晚更新世（6万- 9万年前）经历了突然的扩张。这些研究结果为研究核桃属植物的系统分类学和进化提供了新的思路，对核桃属植物的保护和管理具有重要意义。
Phylogeographic studies contribute to addressing questions regarding the geographic patterns and evolutionary scenarios within and among species and also shed light on the taxonomic status of widely distributed species complexes. The pen shell Atrina pectinata species complex is a widely distributed and economically important bivalve in the northwestern Pacific. Previous phylogeographic studies have identified four genetically distinct cryptic species within the A. pectinata species complex along the coast of China, of which three cryptic species were distributed in the South China Sea. However, less attention has been given to their identification and delimitation. Herein, we report the phylogeography and taxonomic revision of the A. pectinata species complex in the South China Sea using DNA sequence data from mitochondrial cytochrome oxidase I (COI) and 16S ribosomal RNA (16S rRNA), and nuclear 28S ribosomal RNA (28S rRNA) gene markers. Using a combination of phylogenetic and DNA-based species delimitation analysis methods, we found strong support for four genetically valid species in the A. pectinata species complex and defined them as A. japonica, A. lischkeana, Atrina sp., and A. pectinata based on our results as well as on previous morphological and genetic studies. A demographic historical analysis showed that all three species in the South China Sea had populations that were relatively stable over time and then subjected to sudden expansion during the late Pleistocene (60,000–90,000 years ago). These results provide new insights into the systematics and evolution of the A. pectinata species complex and have important conservation and management implications.