基于浮游植物的城市湖泊生态健康评价——以长江下游铜陵市西湖为例

作者：Wang Fang; Li Yongji; Ma Tingting; Chen Huihui; Wang Xiaolong; Li Kuanyi; Wu Zhaoshi^*

来源：Hupo Kexue/Journal of Lake Sciences, 2022, 34(6): 1890-1900.

DOI：10.18307/2022.0628

• ecological condition assessment
• functional groups
• index of biotic integrity
• Lake Xihu
• Phytoplankton

In order to establish phytoplankton community structure and assess ecological condition in Lake Xihu (Tongling), 6 times of sampling were conducted from September 2016 to July 2017. A total of 88 phytoplankton species from 6 phyla were identified. The phytoplankton density varied from 8.20×105 cells/L to 1.60×108 cells/L, and the mean was 2.19×107 cells/L. The biomass varied from 1.34 mg/L to 27.76 mg/L, with a mean of 9.45 mg/L. Phytoplankton were mainly dominated by Microcystis aeruginosa, Planktothrix sp. and Microcystis sp.. Phytoplankton biomass was mainly affected by water temperature, suspended solids, total nitrogen, nitrite, and total phosphorus. There were 22 functional groups were identified, and the Q index indicated that the lake was in moderate condition, with the worst and best ecological conditions in July and November, respectively. Three critical indices, i.e., biomass, density, and Margalef, were selected to establish the index of biotic integrity based on phytoplankton (P-IBI) of Lake Xihu, according to the correlations among indices and environmental parameters. Correlation analysis suggested that the P-IBI was significantly and positively correlated with the Q, while the ecological conditions were significantly worse according to the P-IBI (the overall state is low). This study established phytoplankton community structure in Lake Xihu (Tongling), and evaluated its ecological condition based on Q and P-IBI indices, which will provide a certain reference for its water environment management and ecological condition assessment of lake in urban. ? 2022 by Journal of Lake Sciences.

• 单位
  湖泊与环境国家重点实验室; 桂林理工大学