Zhang Jie, Yao Jianting, Hu Zi-Min, Jueterbock Alexander, Yotsukura Norishige, Krupnova Tatiana N, Nagasato Chikako, Duan Delin
Key Lab of Experimental Marine Biology, Institute of Oceanology Chinese Academy of Sciences Qingdao China.
Laboratory for Marine Biology and Biotechnology Qingdao National Laboratory for Marine Science and Technology Qingdao China.
Evol Appl. 2019 Jan 12;12(4):791-803. doi: 10.1111/eva.12756. eCollection 2019 Apr.
Studies of postglacial range shifts could enhance our understanding of seaweed species' responses to climate change and hence facilitate the conservation of natural resources. However, the distribution dynamics and phylogeographic diversification of the commercially and ecologically important kelp in the Northwest Pacific (NWP) are still poorly surveyed. In this study, we analyzed the evolutionary history of using two mitochondrial markers and 24 nuclear microsatellites. A STRUCTURE analysis revealed two partially isolated lineages: lineage H, which is scattered along the coast of Japan; and lineage P, which occurs along the west coast of the Japan Sea. Ecological niche modeling projections to the Last Glacial Maximum (LGM) revealed that the southern coasts of the Japan Sea and the Pacific side of the Oshima and Honshu Peninsulas provided the most suitable habitats for , implying that these regions served as ancient refugia during the LGM. Ancient isolation in different refugia may explain the observed divergence between lineages P and H. An approximate Bayesian computation analysis indicated that the two lineages experienced post-LGM range expansion and that postglacial secondary contact occurred in Sakhalin. Model projections into the year 2,100 predicted that will shift northwards and lose its genetic diversity center on the Oshima Peninsula in Hokkaido and Shimokita Peninsula in Honshu. The range shifts and evolutionary history of improve our understanding of how climate change impacted the distribution range and diversity of this species and provide useful information for the conservation of natural resources under ongoing environmental change in the NWP.
对冰期后分布范围变化的研究可以增进我们对海藻物种对气候变化反应的理解，从而促进自然资源的保护。然而，西北太平洋（NWP）商业和生态上重要的海带的分布动态和系统地理学多样化仍未得到充分调查。在本研究中，我们使用两个线粒体标记和24个核微卫星分析了[海带名称未给出]的进化历史。STRUCTURE分析揭示了两个部分隔离的谱系：谱系H，沿日本海岸分散分布；谱系P，出现在日本海西海岸。对末次盛冰期（LGM）的生态位建模预测表明，日本海南部海岸以及大岛和本州半岛太平洋一侧为[海带名称未给出]提供了最适宜的栖息地，这意味着这些地区在末次盛冰期是古老的避难所。在不同避难所的古老隔离可能解释了观察到的谱系P和H之间的差异。近似贝叶斯计算分析表明，这两个谱系经历了末次盛冰期后的分布范围扩张，并且在萨哈林岛发生了冰期后的二次接触。对2100年的模型预测表明，[海带名称未给出]将向北转移，并失去其在北海道大岛半岛和本州下北半岛的遗传多样性中心。[海带名称未给出]的分布范围变化和进化历史增进了我们对气候变化如何影响该物种分布范围和多样性的理解，并为西北太平洋持续环境变化下的自然资源保护提供了有用信息。
