水产学报2026，Vol.50Issue(6)：105-118,14.DOI:10.11964/jfc.20251215287
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
Species diversity and distribution characteristics of macroalgae in spring and summer on typical islands of the Xisha Islands,China
摘要
Abstract
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.关键词
大型海藻/物种多样性/西沙群岛Key words
macroalgae/species diversity/Xisha Islands分类
农业科技引用本文复制引用
张秀霞,陈佐,朱军,鲍时翔,邹潇潇..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[J].水产学报,2026,50(6):105-118,14.基金项目
国家重点研发计划(2024YFD2401801) （2024YFD2401801）
农业农村部财政专项(NFZX2021,NFZX2024) National Key R&D Program of China(2024YFD2401801) （NFZX2021,NFZX2024）
Financial Special Project of the Ministry of Agriculture and Rural Affairs(NFZX2021,NFZX2024) （NFZX2021,NFZX2024）
