摘要
为了揭示滇池不同湖区浮游动物群落稳定性及其驱动因子,于2020年对滇池草海、大泊口、外海3个具有一定空间分隔的区域,按季度进行4次采样调查。结果表明,大泊口区域的溶解氧、透明度指标显著高于外海,总氮、总磷、悬浮物、叶绿素a和化学需氧量等指标浓度显著低于外海,草海理化因子浓度介于大泊口与外海之间。研究期间3个区域共鉴定出浮游动物41属(枝角类12属、桡足类8属、轮虫21属),轮虫种类和密度均占较大比例。浮游动物年平均密度大泊口(7771.3 ind./L)>草海(2901.1 ind./L)>外海(634.8 ind./L);年平均生物量草海(3.72 mg/L)>大泊口(2.15 mg/L)>外海(2.09 mg/L)。非参数多元方差分析(PERMANOVA)与相似性百分比分析(SIMPER)结果表明,滇池3个区域间浮游动物群落结构差异极显著,导致大泊口与草海、外海群落结构呈极显著差异的属种为轮虫类群的种类,导致草海与外海群落结构呈极显著差异的属种为枝角类和轮虫类群的种类。此外,浮游动物群落稳定性与物种多样性呈显著的正相关关系,且经过生态修复后水质有所改善的湖区其浮游动物群落稳定性反而有所下降。Pearson相关性分析与冗余分析结果表明,影响浮游动物群落稳定性的主导环境因子为溶解氧、pH和叶绿素a。本研究结果发现滇池异质生境的浮游动物群落稳定性存在较大差异,生态修复后短期内水环境的变化会降低以耐污种为优势所形成的浮游动物群落稳定性。
To investigate the patterns and determinants of zooplankton community stability in different regions of Lake Dianchi,seasonal surveys were conducted in Caohai,Dabokou and Waihai in 2020.The results showed that dissolved oxygen and transparency were significantly higher in Dabokou than in Waihai.Meanwhile,the concentrations of total nitrogen,total phosphorus,suspended solids,chlorophyll-a and chemical oxygen demand were significantly lower in Dabokou than in Waihai,and were significantly different from Caohai compared to both Dabokou and Waihai.A total of 41 genera of zooplankton(12 genera of cladocerans,8 genera of copepods and 21 genera of rotifers)were identified in the three regions.Both species number and density of rotifers were dominant during the surveys.The annual density of zooplankton in Dabokou(7771.3 ind./L)was higher than in Caohai(2901.1 ind./L)and Waihai(634.8 ind./L),while the annual mean biomass of zooplankton in Caohai(3.72 mg/L)was higher than in Dabokou(2.15 mg/L)and Waihai(2.09 mg/L).The results of non-parametric multiple analysis of variance and similarity percentage analysis showed that there were significant differences between the zooplankton communities in the three regions.The community structure of Dabokou(ecological restoration region)was significantly different from that of Caohai and Waihai,and the determinant of the difference was rotifer species.The community structure of cladocerans and rotifers was significantly different between Caohai and Waihai.The stability of the zooplankton community in Waihai was significantly higher than that in Caohai and Dabokou,which was significantly positively correlated with species diversity.Pearson correlation analysis and redundancy analysis showed that the driving environmental factors of zooplankton community stability were dissolved oxygen,pH and chlorophyll-a.The study implied that improving the water environment could reduce the stability of zooplankton community dominated by pollution olerant species.
作者
杨姣姣
陈冬
黄立成
李杨
董晋延
黄超
王纯波
刘永定
杜劲松
潘珉
Yang Jiaojiao;Chen Dong;Huang Licheng;Li Yang;Dong Jinyan;Huang Chao;Wang Chunbo;Liu Yongding;Du Jinsong;Pan Min(Kunming Dianchi and Plateau Lakes Institute,Kunming 650228,P.R.China;Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,P.R.China;Lake Dianchi Ecosystem Observation and Research Station of Yunnan Province,Kunming 650228,P.R.China)
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2023年第5期1752-1764,共13页
Journal of Lake Sciences
基金
云南省-昆明市省市“一体化”重大科技项目(202202AH210006)
云南(昆明)刘永定院士工作站(YSZJGZZ-2020018)项目联合资助。
关键词
滇池
浮游动物
群落稳定性
多样性
生态修复
Lake Dianchi
zooplankton
community stability
diversity
ecological restoration
