印太交汇区八种鱼类群体遗传结构和连通性分析  

The genetic structure and connectivity of eight fish species in the Indo-Pacific Convergence Region

作　　者：黄红伟 张志新 仲嘉 林强[3,4] 郭宝英 严小军 HUANG Hongwei;ZHANG Zhixin;ZHONG Jia;LIN Qiang;GUO Baoying;YAN Xiaojun(Marine Science and Technology College,Zhejiang Ocean University,Zhoushan 316022,China;National Engineering Research Center for Marine Aquaculture,Zhejiang Ocean University,Zhoushan 316022,China;Key Laboratory of Tropical Marine Bio-resources and Ecology,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China;University of Chinese Academy of Sciences,Beijing 100049,China;Yangtze River Fisheries Research Institute,Chinese Academy of Fishery Sciences,Wuhan 430223,China)

机构地区：[1]浙江海洋大学,海洋科学与技术学院,浙江舟山316022 [2]浙江海洋大学,国家海洋设施养殖工程技术研究中心,浙江舟山316022 [3]中国科学院热带海洋生物资源与生态重点实验室,中国科学院南海海洋研究所,广东广州510301 [4]中国科学院大学,北京100049 [5]中国水产科学研究院长江水产研究所,湖北武汉430223

出　　处：《热带海洋学报》2025年第1期9-23,共15页Journal of Tropical Oceanography

基　　金：国家重点研发计划项目(2022YFC3102403);国家重点研发计划项目(2023YFC3108800);国家自然科学基金项目(42276126)。

摘　　要：印太交汇区是海洋生物多样性起源的中心,具有极高的生物多样性。随着全球气候的持续变化和人类活动影响的日益加剧,生态系统逐渐呈现破碎化,此背景下,海洋鱼类在连通破碎化的生态系统和维持生物多样性中发挥重要的生态功能。探究印太交汇区代表鱼类的遗传结构和连通性将有助于明确不同种群间的遗传多样性格局和扩散路径,从而为生物多样性保护提供科学支撑。本研究在印太交汇区5个代表区域(中沙群岛、南沙群岛、西沙群岛、海南岛和菲律宾)收集了八种珊瑚礁栖鱼类(日本刺尾鱼Acanthurus japonicus、波纹钩鳞鲀Balistapus undulatus、尾纹九棘鲈Cephalopholis urodeta、栉齿刺尾鲷Ctenochaetus striatus、金带齿颌鲷Gnathodentex aureolineatus、四带笛鲷Lutjanus kasmira,、黑边角鳞鲀Melichthys vidua和多带副绯鲤Parupeneusmultifasciatus)共309个样本,最终获得515条线粒体细胞色素C氧化酶亚基Ⅰ(cytochrome C oxidase subunit I,COI)基因和16S rDNA序列;为使研究覆盖范围更加广泛,同时在GenBank下载了以上八种鱼类在中国台湾岛、南沙群岛、菲律宾、印度尼西亚海域的线粒体COI基因序列,共86条。基于此,研究分析了以上7个代表区域不同群体间的遗传多样性和遗传分化,结果显示八种鱼类在研究区域整体具有较高水平的遗传多样性和较低的遗传分化,其中多带副绯鲤和波纹钩鳞鲀最为明显;印度尼西亚、中国台湾岛和南海诸岛群体同样具有较高的遗传多样性。研究进一步利用物种分布模型和最小成本路径模型探究了不同种群间的连通性,在此基础上,我们共收集了八种鱼类133047条分布信息,使用最大熵算法(maximum entropy model,MaxEnt)预测当前气候下物种适宜分布的区域,并利用ArcGis 10.2软件SDMtoolbox v2.5工具计算不同种群间的连通性。种群连通性揭示了菲律宾东岸—苏拉威西岛是以上八种鱼类在印�The Indo-Pacific Convergence Region is the center of the origin in marine biodiversity and has extremely high biodiversity.With the dramatic changes in global climate and human activities intensify,ecosystems are gradually fragmenting.In this context,marine fish play important ecological functions in connecting fragmented ecosystems and protecting biodiversity.Exploring the genetic structure and connectivity of typical fish species in the Indo-Pacific Convergence Region will clarify the genetic diversity patterns and diffusion paths among different populations,thereby providing scientific support for the protection of biological diversity.In this study,8 fish species(Acanthurus japonicus,Balistapus undulatus,Cephalopholis urodeta,Ctenochaetus striatus,Gnathodentex aureolineatus,Lutjanus kasmira,Melichthys vidua and Parupeneus multifasciatus)were collected from 5 representative areas in the Indo-Pacific Convergence Region(Zhongsha Islands,Nansha Islands,Xisha Islands,Hainan Island,and the Philippines),totaling 309 samples,515 mitochondrial COI genes and 16S sequences were obtained;To broaden the scope of the study,cytochrome C oxidase subunit I(COI)gene sequences from the Taiwan Island in China and Indonesian were downloaded from GenBank,amounting to 86 sequences.Based on this,we analyzed the genetic diversity and genetic differentiation structure among different groups in the above seven study regions.The overall results show that 8 fish species have high levels of genetic diversity and low genetic differentiation,among which Parupeneus multifasciatus and Balistapus undulatus are the most obvious;Indonesia,Taiwan Island in China and South China Sea Island populations also have high genetic diversity.The study further developed the species distribution models and the least-cost paths model to explore the population connectivity.Based on this,distribution information for the eight fish species(collected from a total of 133,047 points)was used to predict suitable distribution areas under current climate using the Ma

关 键 词：印太交汇区 遗传多样性 扩散 种群连通性 生物多样性保护 

分 类 号：Q347[生物学—遗传学]