海洋科学2024，Vol.48Issue(4)：30-44,15.DOI:10.11759/hykx20230604001
中国四个河口潮间带甲藻孢囊多样性研究
Study on the diversity of dinoflagellate cysts in the four estu-ary intertidal zones of China
摘要
Abstract
Understanding the diversity and formation mechanisms of dinoflagellate cysts from an ecological per-spective is important.In this study,we investigated the diversity of dinoflagellate cysts in the surface sediments of the intertidal zone of the Daliao River Estuary,Jian River Estuary,Minjiang River Estuary,and Jiulong River Estu-ary in China from 2014 to 2016.For this purpose,dinoflagellate cysts were extracted using the sodium polytung-state method from four-quarters of the surface sediment samples.Several dinoflagellate cysts spanning 43 species(belonging to 16 genera)and 5 unidentified species,including 17 autotrophic and 26 heterotrophic species,were identified.Among these species,Protoperidinium mendiolae,Echinidinium delicatum,and Echinidinium trans-parantum were reported for the first time in the coastal areas of China,and four toxic species,including paralytic shellfish poisoning-producing Alexandrium tamarense complex and three yessotoxin-producing species(Proto-ceratium reticulatum,Lingulodinium polyedrum,and Gonyaulax spinifera),were also detected.Significant differ-ences were detected in the abundance of dinoflagellate cysts across the four estuaries.The highest values were found for the Daliao River Estuary at 47-94 cysts/g DW,followed by the Jian River Estuary at 24-75 cysts/g DW.The abundance of cysts in the estuaries of the Minjiang and Jiulong Rivers was relatively low at 14-50 and 5-50 cysts/g DW,respectively.Correlational analyses revealed that the abundance of autotrophic cysts and the total abundance of cysts were both significantly positively correlated with seawater salinity,total dissolved nitrogen concentration,dissolved inorganic nitrogen concentration,and ammonia nitrogen concentration in interstitial water,while the diversity index was significantly positively correlated with seawater salinity and sediment grain size(<63 μm).The findings of this study provide important references to our understanding of dinoflagellate cyst diversity and formation mechanisms in the estuary intertidal zones of China.关键词
河口潮间带/甲藻孢囊/多样性/环境因子Key words
estuary intertidal zone/dinoflagellate cysts/diversity/environmental factors分类
资源环境引用本文复制引用
罗芳,王玉珏,石雅君,韩秋影,顾海峰,刘东艳..中国四个河口潮间带甲藻孢囊多样性研究[J].海洋科学,2024,48(4):30-44,15.基金项目
科技基础性工作专项(2014FY210600) （2014FY210600）
国家自然科学基金重点项目(42030402) （42030402）
山东省海洋局财政项目"海洋生态监测评价"(2023年)Basic Work in Science and Technology,No.2014FY210600 （2023年）
Key Project of National Natural Science Foundation of China,No.42030402 （）
Financial Project of Shandong Oceanic Bureau,China(2023) （2023）
