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2021年渤海浮游植物群落结构及其季节性变化

Phytoplankton Community Structure and Its Seasonal Variationin the Bohai Sea in 2021
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摘要 为比较分析渤海中部和渤海海峡海域浮游植物群落结构的季节性变化及其与环境因子的相关性,分别于2021年春季、夏季和秋季在渤海(118°~122°E, 37°~40°N)设25个站位采集水样,开展浮游植物种类组成、细胞丰度空间分布、优势种、群落结构和环境因子的综合调查研究。在研究海域共检出浮游植物3门68属168种,其中硅藻和甲藻在物种数和细胞丰度上占主要地位。研究结果显示,春季、夏季和秋季浮游植物水柱细胞丰度均值分别为78.76×10^(3)、18.83×10^(3)和25.02×10^(3)个/L,呈“双峰型”,春季为主高峰,秋季为次高峰。细胞丰度空间分布具有季节性差异,春季高值区位于渤海海峡,秋季高值区位于黄河入海口,夏季呈现斑块状分布。群落结构特征中的多样性指数、均匀度指数和丰富度指数均呈现秋季高于春季和夏季的趋势。渤海浮游植物群落结构的时空分布受多个环境因子共同控制,相较于夏季,春季和秋季营养盐对浮游植物的影响更为显著。 To compare and analyze the seasonal variation of phytoplankton community structure and its correlation with environmental factors within the central Bohai Sea and the Bohai Strait,water samples from 25 stations(118°-122°E,37°-40°N)were collected from the Bohai Sea in spring,summer and autumn of 2021.The phytoplankton species composition,abundance distribution,dominant species,community structure and environmental factors were comprehensively surveyed.A total of 168 phytoplankton taxa affiliated to 68 genera of 3 phyla were identified,among which diatom and dinoflagellate were the most abundant.The average water column cell abundance of phytoplankton in spring,summer,and autumn was 78.76×10^(3),18.83×10^(3),and 25.02×10^(3) cells/L,respectively,and showed a“two-peak pattern”,with a main peak in spring and a sub-peak in autumn.The spatial distribution of phytoplankton cell abundance differed seasonally.The high-value area was located in the Bohai Strait in spring,but was at the Yellow River Estuary in autumn,was patchy in summer.The diversity index,evenness index and richness index of the community structure in autumn were all higher than those in spring and summer.The spatial-temporal distribution of phytoplankton community structure in the Bohai Sea was affected by multiple environmental factors.Compared with summer,nutrients had more significant effects on phytoplankton in spring and autumn.
作者 李亚倩 张倩 杨世民 LI Yaqian;ZHANG Qian;YANG Shimin(College of Marine Life Science,Ocean University of China,Qingdao 266003,China)
出处 《海洋科学进展》 CAS CSCD 北大核心 2024年第2期337-348,共12页 Advances in Marine Science
基金 山东联合基金重点项目(U1806211)。
关键词 渤海 浮游植物 群落结构 季节性变化 the Bohai Sea phytoplankton community structure seasonal variation
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