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Ruimin Qi¹, Davey L Jones², Yuanyuan Tang³

¹Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, College of Engineering, Southern University of Science and Technology, Shenzhen 518055, China; Key Laboratory of Prevention and Control of Residual Pollution in Agricultural Film, Ministry of Agriculture and Rural Affairs, Beijing 100081, China.

Journal of hazardous materials

|May 24, 2024

概括

微塑料的类型和剂量显著改变了土壤微生物群落. 可生物降解的微塑料丰富了病原体,而增加的微塑料剂量影响了微生物组成,而不是类型.

科学领域:

环境科学环境科学
微生物学微生物学
土壤科学土壤科学

背景情况:

微塑料 (MP) 是新兴的土壤污染物.
了解它们对土壤微生物群落的影响至关重要.

研究的目的:

研究不同微塑料类型 (不可降解和可生物降解) 和剂量对土壤微生物群落结构和功能的影响.
阐明微塑料特征与微生物反应之间的调节机制和反循环.

主要方法:

一个微观实验,使用两种不可降解的 (聚乙烯,聚乙烯) 和四种可生物降解的 (聚乙烯酸盐,聚酸酸酸酸酸酸酸酸酸酸酸酸酸酸酸酸酸酸酸酸) 微塑料,度为1%,7%和28%.
对土壤物理化学性质 (pH,电导率,总,总碳,土壤有机碳) 和微生物生物质碳 (MBC) 的分析.
结构方程建模 (SEM) 以评估微塑料类型和剂量对微生物多样性和组成的直接和间接影响.

主要成果:

增加的微塑料剂量通常会增加总碳 (TC),土壤有机碳 (SOC) 和微生物生物质碳 (MBC),除了聚乙烯酸盐 (PBS) 修改土壤中的MBC外.
与不可降解类型相比,可生物降解的微塑料促进了更活跃的生态利基,并丰富了较高的病原体丰富度.
微生物多样性主要受到微塑料类型的影响,而微生物组成对微塑料剂量更敏感. 这两个因素都显著改变了土壤的特性,影响了微生物群落.

结论:

微塑料的类型和剂量对土壤微生物群落和物理化学性质产生明显而显著的影响.
可生物降解的微塑料可能由于病原体丰富而构成更大的风险.
这些发现为评估陆地生态系统中微塑料污染相关的生态风险提供了关键的见解.

关键词:

生态功能生态功能微生物社区的微生物社区.微塑料是一种微塑料.监管机制监管机制结构方程建模结构方程建模

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