摘要
浮游植物群落特征、多样性和功能群分析可以反映水体环境质量状态.为探究城市河道黑臭对浮游植物群落的影响,2020年11月至2021年3月,以四川盆地内16条城市河道,38个采样点水环境质量调查数据为基础,基于改进的模糊综合评价模型法和k-均值主颜色提取法评价城市河道黑臭程度,将河道划分为不黑不臭型、只黑不臭型、只臭不黑型和又黑又臭型这4种河道类型,在此基础上对不同黑臭类型河道的浮游植物群落结构、多样性和功能群进行分析.结果表明,城市河道从不黑不臭型至又黑又臭型,浮游植物丰度从1.329×105cells·L^(-1)升至6.627×105cells·L^(-1),组成由蓝藻-绿藻-硅藻型变化为蓝藻型;浮游植物生物量从64.056μg·L^(-1)升至120.465μg·L^(-1),组成由适应营养盐环境的绿藻-硅藻型转变为适宜有机物环境的甲藻-硅藻-裸藻型;Shannon-Weaver多样性指数从2.45下降到1.98,Simpson指数从0.84下降到0.73.研究区域浮游植物共29个功能群,随着水质黑臭化,生长策略由S、 R、 C、 CR和CS型组成,减少为以R型为主.综上,浮游植物指标能较好地反映河道黑臭状态,在城市河道黑臭管理中,浮游植物监测是具有前景的手段和方法.
Phytoplankton community characteristics,diversity,and functional group analysis can respond to the environmental quality status of water bodies.To investigate the influence of urban river black odors on the phytoplankton community,from November 2020 to March 2021,16 urban rivers in the Sichuan Basin were surveyed for water quality with 38 sampling points,and the degree of urban river black odor was evaluated based on the improved fuzzy mathematical model method and the k⁃mean principal color extraction method.The rivers were classified into four types:non⁃black and non⁃odorous,black and non⁃odorous,black and odorous,and black and odorous.The results showed that,with black and odorous water,the phytoplankton abundance increased from 1.329×105 cells·L^(-1) to 6.627×105 cells·L^(-1),and the dominant phytoplankton phylum decreased from Cyanophyta⁃Chlorophyta⁃Bacillariophyta to Cyanophyta.The phytoplankton biomass increased from 64.056μg·L^(-1) to 120.465μg·L^(-1),and the dominant phytoplankton phylum changed from Chlorophyta⁃Bacillariophyta type,adapted to a nutrient environment,to Pyrrophyta⁃Bacillariophyta⁃Cryptophyta type,adapted to an organic matter environment.The Shannon⁃Weaver diversity index decreased from 2.45 to 1.98,and Simpson's index decreased from 0.84 to 0.73.Twenty nine functional groups of phytoplankton were observed in the study area,and the growth strategy was reduced from S,R,C,CR,and CS to R with black and odorous water.In summary,phytoplankton indicators can better reflect the state of river black odor,and phytoplankton monitoring is a promising tool for urban river black odor management.
作者
张琪琪
曾劼
尹卓
冯杰
刘静
修宇鑫
刘国
许春阳
ZHANG Qi-qi;ZENG Jie;YIN Zhuo;FENG Jie;LIU Jing;XIU Yu-xin;LIU Guo;XU Chun-yang(College of Ecology and Environment,Chengdu University of Technology,Chengdu 610059,China;State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil&Water Pollution(SEKL-SW),Chengdu University of Technology,Chengdu 610059,China;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;College of Harbor,Coastal and Offshore Engineering,Hohai University,Nanjing 210024,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2023年第9期4965-4976,共12页
Environmental Science
基金
四川省环境治理与生态环保重大科技专项(2019YFS0504)
四川省大学生创新创业计划项目(S202110616075)
成都理工大学中青年骨干教师发展计划项目(10912-JXGG2020-06887)。
关键词
黑臭水体
浮游植物
群落构成
多样性
功能群
black odorous water
phytoplankton
community composition
diversity
functional group
