在农田中,可生物降解和常规微塑料的塑料圈之间的不同真菌组合和功能
Kang Li1, Libo Xu1, Xinyi Bai1
1State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
The Science of the total environment
|October 7, 2023
概括
与传统塑料不同,可生物降解的微塑料招募了不同的真菌群落,包括潜在的塑料降解剂和病原体. 这凸显了生物降解塑料污染对土壤健康的风险.
科学领域:
- 环境微生物学 环境微生物学
- 土壤科学 土壤科学
- 生态毒理学 生态毒理学
背景情况:
- 土壤微生物群,包括真菌,对于生态系统功能至关重要.
- 微塑料污染是普遍存在的,改变了土壤环境.
- 微塑料 (塑球) 上的真菌群落尚未得到充分研究,特别是比较可生物降解和常规类型.
研究的目的:
- 描述和比较聚乙烯 (PE) 和可生物降解的聚乙烯基基甲酸/聚酸 (PBAT/PLA) 微塑料上的真菌群落.
- 在这些微塑料上研究控制真菌社区聚集的生态过程.
- 评估农业土壤中可生物降解的微塑料上与真菌群落相关的潜在风险.
主要方法:
- 从中国河北的农田收集PE和PBAT/PLA微塑料.
- 高通量测序用于分析真菌群体的组成和多样性.
- 微生物社区聚集过程的分析 (随机性,分散限制).
- 网络分析以评估社区结构的稳定性.
主要成果:
- 与PE塑相比,PBAT/PLA塑表现出明显较低的真菌α多样性和独特的社区组成.
- 富含PBAT/PLA塑层的真菌种群具有塑料降解潜力 (例如,尼克特里亚科,普莱斯波拉科,迪迪梅拉科).
- 真菌社区的组装主要是对两种微塑料类型的随机漂移和分散限制.
- PBAT/PLA塑球表现出更稳定和复杂的真菌网络.
- 与PE微塑料相比,PBAT/PLA上发现了较高的植物和动物病原体的相对丰度.
结论:
- 可生物降解的微塑料 (PBAT/PLA) 拥有独特的真菌群落,与传统的微塑料 (PE) 不同.
- 这些社区包括潜在的塑料降解剂和更高的病原体负载,对土壤健康构成更大的风险.
- 了解塑球真菌生态对于评估微塑料污染对环境的影响至关重要,特别是可生物降解的类型.
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