我国西沙群岛典型岛礁春夏季大型海藻物种多样性及其分布特征OA
Species diversity and distribution characteristics of macroalgae in spring and summer on typical islands of the Xisha Islands,China
[目的]为了解西沙群岛大型海藻物种多样性及其空间分布特征.[方法]采用环岛潜水采样方式,对永兴岛、北岛、赵述岛、晋卿岛、石屿、银屿、全富岛、甘泉岛、琛航岛、珊瑚岛和金银岛共 11 座典型岛礁春夏季大型海藻物种组成进行鉴定,并对各岛大型海藻进行 Shannon 多样性指数、Margalef 丰富度指数和 Pielou 物种均匀度指数分析.[结果]本次调查共采集大型海藻 100 种,隶属 3 门 3 纲 18 目 29 科 57 属.网球藻为本次调查中分布最广的物种;球枝藻、厚节仙掌藻和大叶仙掌藻在多数岛礁表现为优势种或重要种.基于物种数并结合多样性指数的综合分析,永兴岛物种数最多且 Shannon 多样性指数最高;赵述岛物种数较少且Margalef 指数最低;甘泉岛物种数最少但Margalef 指数最高;全富岛物种名录较丰富,却具有最低的Shannon 多样性指数与Pielou 均匀度指数.[结论]综合本研究结果与文献记录,西沙群岛已知大型海藻物种共计 344 种,隶属 3 门 3 纲 21 目41 科124 属,其中红藻门最为丰富,包含1 纲9 目21 科81 属194 种,占物种数的56.40%;绿藻门次之,共 1 纲 7 目 13 科 27 属 90 种(26.16%);褐藻门含 1 纲 5 目 7 科 16 属 60 种(17.44%).本研究通过开展对西沙群岛 11 个岛礁春夏季的大型海藻资源本底调查与分析,系统梳理了该区域春夏季大型海藻的物种组成与区系特征,为西沙群岛生态系统的保护、修复与可持续管理提供参考数据.
To investigate the species diversity and spatial distribution characteristics of macroalgae in the Xisha Islands,this study identified the species composition of macroalgae in spring and summer around 11 typical islands and reefs of the Xisha Islands,namely Yongxing Island,North Island,Zhaoshu Island,Jinqing Island,Shiyu,Yinyu,Quanfu Island,Ganquan Island,Chenhang Island,Shanhu Island,and Jinyin Island,using a circum-insular diving sampling method.The Shannon diversity index,Margalef richness index,and Pielou evenness index of macroalgae were analyzed for each island.A total of 100 species of macroalgae were collected in this survey,belonging to 57 genera,29 families,18 orders,3 classes,and 3 phyla.Dic-tyosphaeria was the most widely distributed species in this survey;Galaxaura,Halimeda incrassata,and H.macroloba were dominant or important species in most islands and reefs.Based on a comprehensive analysis of species number and diversity indices,Yongxing Island had the highest number of species and the highest Shannon diversity index;Zhaoshu Island had a rel-atively low number of species and the lowest Margalef index;Ganquan Island had the lowest number of species but the highest Margalef index;Quanfu Island had a relatively rich species list but exhibited the lowest Shannon diversity index and Pielou evenness index.Combining the results of this study with literature records,a total of 344 species of macroalgae are known in the Xisha Islands,belonging to 124 genera,41 families,21 orders,3 classes,and 3 phyla.Among them,Rhodophyta is the most abundant,containing 194 species in 81 genera,21 families,9 orders,and 1 class,accounting for 56.40%of the total species;Chlorophyta follows,with 90 species in 27 genera,13 families,7 orders,and 1 class(26.16%);Ochrophyta(Phaeophyceae)includes 60 species in 16 genera,7 families,5 orders,and 1 class(17.44%).Through this background investigation and ana-lysis of macroalgae resources around 11 islands and reefs of the Xisha Islands in spring and summer,this study systematically clarifies the species composition and floristic characteristics of macroalgae in the region during spring and summer,providing reference data for the protection,restoration,and sustainable management of the Xisha Islands ecosystem.
张秀霞;陈佐;朱军;鲍时翔;邹潇潇
中国热带农业科学院热带生物技术研究所,海南省海洋生物资源功能性成分研究与利用重点实验室,海南 海口 571101中国热带农业科学院热带生物技术研究所,海南省海洋生物资源功能性成分研究与利用重点实验室,海南 海口 571101中国热带农业科学院热带生物技术研究所,海南省海洋生物资源功能性成分研究与利用重点实验室,海南 海口 571101中国热带农业科学院热带生物技术研究所,海南省海洋生物资源功能性成分研究与利用重点实验室,海南 海口 571101中国热带农业科学院热带生物技术研究所,海南省海洋生物资源功能性成分研究与利用重点实验室,海南 海口 571101
农业科技
大型海藻物种多样性西沙群岛
macroalgaespecies diversityXisha Islands
《水产学报》 2026 (6)
105-118,14
国家重点研发计划(2024YFD2401801)农业农村部财政专项(NFZX2021,NFZX2024) National Key R&D Program of China(2024YFD2401801)Financial Special Project of the Ministry of Agriculture and Rural Affairs(NFZX2021,NFZX2024)
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