Berman Gabriella H, Johnson Shannon B, Seid Charlotte A, Vrijenhoek Robert C, Rouse Greg W
Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, United States of America Scripps Institution of Oceanography, University of California San Diego La Jolla, CA United States of America.
Monterey Bay Aquarium Research Institute, Moss Landing, United States of America Monterey Bay Aquarium Research Institute Moss Landing United States of America.
Biodivers Data J. 2023 Jun 30;11:e102803. doi: 10.3897/BDJ.11.e102803. eCollection 2023.
First described in 2004 off California, worms are now known from many of the world's oceans, ranging from 10 to over 4000 m in depth. Currently, little is known about species ranges, since most descriptions are from single localities. In this study, we used new sampling in the north-eastern Pacific and available GenBank data from off Japan and Brazil to report expanded ranges for five species: , , , and . We also provided additional DNA sequences from previously reported localities for two species: and . To assess the distribution of each species, we used cytochrome c oxidase subunit I () sequences to generate haplotype networks and assess connectivity amongst localities where sampling permitted. , , , and all had one or more dominant haplotypes shared by individuals at multiple localities, suggesting high connectivity throughout some or all of their ranges. Low Φ values amongst populations for , and confirmed high levels of gene flow throughout their known ranges. High Φ values for between the eastern Pacific and the Brazilian Atlantic showed little gene flow, reflected by the haplotype network, which had distinct Pacific and Atlantic haplotype clusters. This study greatly expands the ranges and provides insights into the phylogeography for these nine species.
这些蠕虫于2004年在加利福尼亚海域首次被发现,如今在世界许多海洋中都有发现,深度范围从10米到4000多米。目前,由于大多数描述都来自单一地点,对物种分布范围了解甚少。在本研究中,我们利用东北太平洋的新样本以及来自日本和巴西海域的GenBank现有数据,报告了五个物种([此处物种名缺失]、[此处物种名缺失]、[此处物种名缺失]、[此处物种名缺失]和[此处物种名缺失])分布范围的扩大情况。我们还提供了两个物种([此处物种名缺失]和[此处物种名缺失])先前报告地点的额外DNA序列。为了评估每个物种的分布情况,我们使用细胞色素c氧化酶亚基I(COI)序列生成单倍型网络,并评估在允许采样的地点之间的连通性。[此处物种名缺失]、[此处物种名缺失]、[此处物种名缺失]、[此处物种名缺失]和[此处物种名缺失]都有一个或多个占主导地位的单倍型,多个地点的个体共享这些单倍型,这表明在它们的部分或全部分布范围内具有高度连通性。[此处物种名缺失]、[此处物种名缺失]和[此处物种名缺失]种群间较低的Φ值证实了在其已知分布范围内存在高水平的基因流动。东太平洋和巴西大西洋之间的[此处物种名缺失]的高Φ值表明基因流动很少,单倍型网络也反映了这一点,该网络有明显的太平洋和大西洋单倍型簇。这项研究极大地扩展了这些物种的分布范围,并为这九个物种的系统地理学提供了见解。