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上游土地利用与微生物下游影响:铁和湿物质与Legionella sppp有关

Jon Ahlinder¹, Karolina Ida Anna Eriksson², Maria Hellmér³

¹Division of CBRN Defence and Security, Swedish Defence Research Agency (FOI), Sweden; Department of Tree Breeding, Skogforsk, Sävar, SE-91821, Sweden.

|April 17, 2024

概括

土地的强化利用对湖泊水质有间接的影响,通过流入,影响细菌群落,并可能增加诸如军团菌 (Legionella) 等病原体. 了解这些间接影响对于保护水资源至关重要.

科学领域:

环境微生物学环境微生物学
水质管理水质管理.
生态系统动态生态系统动态

背景情况:

强化土地利用可能会降低水质,增加细菌病原体风险.
虽然直接污染已知,但对水化学和微生物群的间接影响却不太清楚.
这些间接影响给公共供水带来了下游的重大风险.

研究的目的:

评估土地利用对瑞典湖泊及其流入的直接和间接下游影响.
研究人类活动如何影响水中的微生物群和水质指标.
确定污染途径,并为水资源管理策略提供信息.

主要方法:

研究了五个瑞典湖泊及其流入量,跨越了人类活动的梯度.
在四个时间点分析了160个样本,以检测微生物和水质指标.
采用了物种分布建模,随机森林,以及基于16S rRNA amplicon测序数据的网络分析.

主要成果:

土地利用对流入的微生物群产生重大影响,影响了大约三分之一的种群.
流入的变化对湖泊微生物群产生影响,影响20-50%的湖泊种群.
细菌病原体,如军团菌,在流入中丰富,并与农业用地使用有关.

结论:

土地利用对湖泊生态系统产生间接影响,主要是通过流入.
对湖泊的直接影响不能仅仅从物理化学或微生物参数中辨别出来.
缓解上游土地利用的间接影响对于确保安全的水资源和防止病原体丰富至关重要.

关键词:

人类产生的影响是人类产生的.土地利用对微生物群和水质的影响.水资源/水资源管理水上安全水上安全细菌病原体是一种细菌病原体.

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