Centre for Research On Environmental Ecology and Fish Nutrition (CREEFN), Ministry of Agriculture, Shanghai Ocean University, Shanghai, 201306, China.
College of Fisheries and Life Sciences, Lingang New District, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, People's Republic of China.
Environ Monit Assess. 2022 Apr 20;194(5):382. doi: 10.1007/s10661-022-09958-x.
Seasonal variation in phytoplankton community structure within Tang-Pu Reservoir (Shaoxing city, Zhejiang province, China) was investigated in relation to variation in physicochemical and hydrological characteristics. Over the three-study seasons (autumn, winter, and spring), phytoplankton abundance and biomass showed a gradual increase with the peak in spring season. During this study period, phytoplankton community comprised of 7 phyla, 80 genera, and 210 species. The dominating phyla were Chlorophyta 80 species, Bacillariophyta 46, and Cyanophyta 44 as well as other phyla of freshwater ecosystems except Xanthophyta. The phytoplankton density and biomass varied in the six sampling sites between a minimum of 257.42 × 10 cells/L to 1054.15 × 10 cells/L and 1.60 mg/L to 4.56 mg/L respectively. Spring season had higher biomass and density values than autumn and winter. Furthermore, the results indicated that the Shannon-Wiener (H') and Pielou evenness (J') indices of phytoplankton community were stable although with slightly higher values in spring. Based on the calculated indices, Tang-Pu reservoir could be considered mesosaprobic in all the three seasons. Redundancy analysis (RDA) revealed that pH, total nitrogen (TN), total phosphorus (TP), transparency, chlorophyll a (Chl a), dissolve oxygen (DO), and water temperature (WT) were responsible for most phytoplankton community shift from Bacillariophyta and Cryptophyta to Cyanophyta and Chlorophyta in spring. These environmental parameters play an essential role in the community structure variation of phytoplankton in the downstream and upstream of Tang-Pu Reservoir. A decreasing phytoplankton abundance trend from the river area (inlet) to the lake (outlet) was also observed.
本研究调查了浙江绍兴汤浦水库的浮游植物群落结构季节性变化与理化和水文特征变化的关系。在三个研究季节（秋季、冬季和春季）中，浮游植物丰度和生物量逐渐增加，春季达到峰值。在研究期间，浮游植物群落由 7 个门、80 个属和 210 个种组成。优势门类为绿藻门（80 种）、硅藻门（46 种）和蓝藻门（44 种），以及除黄藻门外的其他淡水生态系统门类。浮游植物密度和生物量在六个采样点之间变化范围从最低的 257.42×10 细胞/L 到 1054.15×10 细胞/L 和 1.60mg/L 到 4.56mg/L。春季的生物量和密度值高于秋季和冬季。此外，结果表明，尽管春季的 Shannon-Wiener（H'）和 Pielou 均匀度（J'）指数稍高，但浮游植物群落的这些指数较为稳定。根据计算得出的指数，汤浦水库在三个季节均为中污型。冗余分析（RDA）表明，pH 值、总氮（TN）、总磷（TP）、透明度、叶绿素 a（Chl a）、溶解氧（DO）和水温（WT）是浮游植物群落从硅藻门和隐藻门向蓝藻门和绿藻门转变的主要原因。这些环境参数对汤浦水库上下游浮游植物群落结构的变化起着重要作用。还观察到从河流区域（入口）到湖泊（出口）浮游植物丰度呈下降趋势。
