饮水型水库浮游植物功能群分布特征及环境驱动因子
Distribution of Phytoplankton Functional Groups in a Drinking Water Reservoir and Analysis of Environmental Driving Factors
投稿时间:2020-05-16  修订日期:2022-03-24
中文关键词:浮游植物  功能群  环境驱动因子  生长策略  珊溪水库
英文关键词:phytoplankton  functional group  environmental driving factors  growth strategy  Shanxi reservoir
基金项目:国家重点研发计划项目(2018YFD0900805);国家自然科学基金项目(41471069)
作者单位
杨萌卓 河海大学农业科学与工程学院江苏 南京 210098 
夏继红 河海大学农业科学与工程学院江苏 南京 210098 
蔡旺炜 河海大学农业科学与工程学院江苏 南京 210098 
杨陆波 河海大学农业科学与工程学院江苏 南京 210098 
朱星学 河海大学农业科学与工程学院江苏 南京 210098 
李朝达 河海大学农业科学与工程学院江苏 南京 210098 
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中文摘要:
      浮游植物群落结构既可以反映水源水环境质量,也能指示水源生态系统的健康状况。以浙江温州珊溪水库为例,探究水库丰水期到枯水期水文情势变化过程中浮游植物群落分布特征的变化及其影响因子。基于功能群分类体系确定浮游植物优势功能群,应用Pearson相关分析和冗余分析法研究水库不同生态区中浮游植物功能群、Margalef丰富度指数和生态健康指数(Q)的分布特征,进一步采用冗余分析识别不同水文情势期下其主要环境驱动因子,探讨浮游植物优势功能群演替、生长策略模式及其与驱动因子的互指示关系。结果表明:(1)珊溪水库浮游植物可分为19个功能群,功能群个数丰水期最高,枯水期最低,其中M、MP、C、P为4个优势功能群;(2)珊溪水库浮游植物优势功能群在丰水期→平水期→枯水期的演替特征为MP→M→C;(3)Q指数为2.66~3.26,水体整体情况为中营养,其中丰水期和平水期的Q指数较枯水期更低,表明此时珊溪水库营养化污染问题更为严重,与功能群分布的动态变化特征一致;(4)氧化还原电位、高锰酸盐指数和水温为影响珊溪水库浮游植物优势功能群和相关生物指标时空变化的主要驱动因子;(5)浮游植物优势功能群与关键环境因子之间存在明显的对应关系,依据优势功能群适宜生境特点及生长策略可以相互指示。
英文摘要:
      Phytoplankton community structure reflects both the water quality and the ecosystem health of freshwater resources. Shanxi reservoir is a vital drinking water source for Wenzhou City, Zhejiang Province. In this investigation, Shanxi reservoir was selected for a case study and the dominant phytoplankton functional groups, succession pattern and growth strategies in the different hydrological periods (flood, normal, dry) were characterized using functional group classification methods. The distribution of dominant phytoplankton functional groups, Margalef richness index and the Q values of the ecological health index were analyzed in the different ecological zones (riverine, transition and lake). Redundancy analysis was used to identify the primary driving factors that influence the dominant functional groups. The aim was to provide a reference for the health assessment and management of drinking water sources. In July and October, 2018 and January, 2019, a phytoplankton investigation was carried out in Shanxi reservoir along five transects in the three ecological zones. The water quality parameters measured included water temperature (WT), pH, specific conductivity (SpC), turbidity (Tur), oxidation-reduction potential (ORP), permanganate index (CODMn) and TP. Results show that: (1) A total of 19 phytoplankton functional groups were identified in Shanxi reservoir, and the dominant functional groups were M, MP, C and P. The number of functional groups was highest during the flood period and lowest during the dry period. The phytoplankton cell density in the riverine zone was much higher than in the other ecological zones. (2) The succession pattern of dominant functional groups in the different hydrological periods (flood→normal→dry) was MP→M→C. (3) The Q value range, 2.66-3.26, indicated mesotrophic conditions. The Q values were lower in the flood and normal periods, indicating higher nutrient levels during those times, consistent with functional group dynamics. (4) The ORP, CODMn, and WT were the primary driving factors affecting the spatial and temporal distributions of dominant functional groups and related biological indicators. (5) There was a clear correlation between the dominant functional groups and key drivers, and thus, either one can be used to estimate the other.
杨萌卓,夏继红,蔡旺炜,杨陆波,朱星学,李朝达.2022.饮水型水库浮游植物功能群分布特征及环境驱动因子[J].水生态学杂志,43(2):37-44.
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