鱼和砷对湖泊水体和沉积物细菌群落的影响
Effects of fish and arsenic on bacterial communities in lake water and sediment
熊小波 1甘秋雨 2陶丽斌 1卢紫珞 1姜玉玲 3李欢 4王洪涛1
作者信息
- 1. 黄河中下游数字地理技术教育部重点实验室,河南大学地理与环境学院,开封,475004
- 2. 河南大学迈阿密学院,开封,475004
- 3. 信阳师范大学地理科学学院,信阳,464007
- 4. 中国环境科学研究院环境基准与风险评估国家重点实验室,北京,100012
- 折叠
摘要
湖泊是水体生物多样性的一个重要存储库,湖泊砷污染问题在全球范围内被广泛关注,然而鱼扰动和砷污染的联合作用对水体和沉积物微生物影响研究却很少报道.鉴于此,本研究通过室内模拟湖泊生态系统,并采用高通量测序技术以探究鱼类活动和砷污染下湖泊水体和沉积物细菌群落的响应机制.研究结果表明,沉积物细菌多样性显著高于水体和鱼组织中细菌多样性.鱼和砷均能引起水体和沉积物细菌群落的改变,鱼和砷的共同作用可使沉积物细菌多样性显著降低,同时可导致水体中黄杆菌属(Flavobacterium)和红杆菌属(Rhodobacter)的含量显著降低.这些结果有利于深入了解湖泊水体和沉积物细菌群落,为开展污染物和生物扰动联合作用下的生态风险研究提供科学依据.
Abstract
Lake ecosystems are thought as an important reservoir of aquatic biodiversity,lake arsenic contamination is a growing concern for global safety and health.However,the combined effect of arsenic and fish disturbance on microbial communities in water and sediments are rarely reported.Herein,a microcosm experiment was used to explore the alteration of bacterial communities of lake water and sediment under fish activity and/or arsenic using Illumina sequencing analysis.The results showed that bacterial diversity in sediments was significantly higher than that in water and fish.Both fish and arsenic could cause changes in bacterial communities in water and sediments.In addition,co-exposure to arsenic and fish decreased significantly the bacterial diversity in sediments,also reduce observably the relative abundance of Flavobacterium and Rhodobacter in water.Our findings broaden the current scientific knowledge of the microbial communities in lake and sediment ecosystems,and provide scientific basis for ecological risk study under the combined effects of pollutants and biological disturbance.
关键词
湖泊/沉积物/鱼扰动/砷污染/细菌多样性Key words
lake/sediment/fish disturbance/arsenic pollution/bacterial diversity引用本文复制引用
出版年
2024
NETL
NSTL
万方数据