深圳盐田港海域甲藻孢囊的分布特征  

Distribution characteristics of dinoflagellate cysts in the Yantian Port,Shenzhen, China

作　　者：赵薇 周进 徐轶肖 ZHAO Wei;ZHOU Jin;XU Yixiao(Institute for Ocean Engineering,Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China;Ministry of Education Key Laboratory of Environment Change and Resources Use in Beibu Gulf,Nanning Normal University,Nanning 530001,China;Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation,Nanning Normal University,Nanning 530001,China)

机构地区：[1]清华大学深圳国际研究生院,海洋工程研究院,深圳518055 [2]南宁师范大学北部湾环境演变与资源利用教育部重点实验室,南宁530001 [3]南宁师范大学广西地表过程与智能模拟重点实验室,南宁530001

出　　处：《应用与环境生物学报》2022年第6期1408-1414,共7页Chinese Journal of Applied and Environmental Biology

基　　金：国家自然科学基金项目(41976126,41976155);深圳市科创委基础研究项目(RCJC20200714114433069,JCYJ20200109142818589);北部湾环境演变与资源利用教育部重点实验室、广西地表过程与智能模拟重点实验室开放课题(GTEU-KLOP-K1805)资助。

摘　　要：为了解深圳盐田港海域表层沉积物中甲藻孢囊的时空分布特征,于2020年1月至2020年10月在盐田港进行了一年的季度调查,共鉴定出已知甲藻孢囊五大类36种,未知种类2种.其中锥状斯氏藻(Scrippsiella trochoidea)、亚历山大藻(Alexandrium spp.)、链状裸甲藻(Gymnodinium catenatum)、旋沟藻(Cochlodinium spp.)和多边舌甲藻(Lingulodinium polyedrum)为主导物种.时间分布上,甲藻孢囊全年种类数介于32-36种之间,全年丰度则在297-996个/g之间,异养型甲藻孢囊种类数和丰度均高于自养型,季节差异不明显.空间分布上,船舶码头附近的站位种类数和丰度均高于附近的对照点.甲藻孢囊多样性指数、丰富度指数和均匀度指数全年的平均值分别为3.65、1.55和0.93.此外,本次调查在该海域共发现了6种有毒甲藻孢囊,且全年均有分布,有些甚至成为优势种,需要特别关注.本研究对深圳盐田港近岸的甲藻“种源库”进行了摸底,结果对预测该海域藻华发生有一定参考价值,可为大湾区海洋环境保护提供基础资料和科学依据.(图6表2参28)An annual quarterly survey of six stations in Yantian Port, Shenzhen, China was conducted from January 2020 to October 2020 to investigate the spatial and temporal distribution of dinoflagellate cysts in the surface sediment of Yantian Port. In total, 36 species representing five groups and two uncertain taxa were identified.The dominant species were Scrippsiella trochoidea, Alexandrium spp., Gymnodinium catenatum, Cochlodinium spp., and Lingulodinium polyedrum. The seasonal difference was not obvious in terms of temporal distribution.The number of species ranged from 32 to 36, and the abundance varied from 297 to 996 cysts/g. The annual average values of the diversity index, richness index, and evenness index were 3.65, 1.55, and 0.93, respectively.The annual number and abundance of heterotrophic species were higher than those of autotrophic species. The number and abundance of species at stations near the dock zone were lower than those near the adjacent area.Notably, six toxic dinoflagellate cysts were found in the surface sediment of Yantian Port, indicating a potential outbreak risk for their vegetative cells in the local coastal area. This study provides a picture of the “Seed Bank” of dinoflagellates near Yantian Port, Shenzhen, and provides a reference value for predicting the occurrence of algal blooms.

关 键 词：深圳盐田港 表层沉积物 甲藻孢囊 时空分布 种源库 

分 类 号：Q948[生物学—植物学]