Micro/nanoplastics pollution poses a potential threat to soil health,Global Change Biology

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Micro/nanoplastics pollution poses a potential threat to soil health
Global Change Biology ( IF 10.8 ) Pub Date : 2024-08-16 , DOI: 10.1111/gcb.17470
Li Chen _{1,

2} , Tianyi Qiu _{1,

2} , Fengyu Huang _{1,

2} , Yi Zeng ₁ , Yongxing Cui ₃ , Jing Chen ₄ , Jason C White ₅ , Linchuan Fang _{1,

2}

Affiliation

Micro/nanoplastic (MNP) pollution in soil ecosystems has become a growing environmental concern globally. However, the comprehensive impacts of MNPs on soil health have not yet been explored. We conducted a hierarchical meta‐analysis of over 5000 observations from 228 articles to assess the broad impacts of MNPs on soil health parameters (represented by 20 indicators relevant to crop growth, animal health, greenhouse gas emissions, microbial diversity, and pollutant transfer) and whether the impacts depended on MNP properties. We found that MNP exposure significantly inhibited crop biomass and germination, and reduced earthworm growth and survival rate. Under MNP exposure, the emissions of soil greenhouse gases (CO2, N2O, and CH4) were significantly increased. MNP exposure caused a decrease in soil bacteria diversity. Importantly, the magnitude of impact of the soil‐based parameters was dependent on MNP dose and size; however, there is no significant difference in MNP type (biodegradable and conventional MNPs). Moreover, MNPs significantly reduced As uptake by plants, but promoted plant Cd accumulation. Using an analytical hierarchy process, we quantified the negative impacts of MNP exposure on soil health as a mean value of −10.2% (−17.5% to −2.57%). Overall, this analysis provides new insights for assessing potential risks of MNP pollution to soil ecosystem functions.

中文翻译：

微/纳米塑料污染对土壤健康构成潜在威胁

土壤生态系统中的微/纳米塑料（MNP）污染已成为全球日益关注的环境问题。然而，MNP 对土壤健康的综合影响尚未得到探讨。我们对 228 篇文章中的 5000 多个观察结果进行了分层荟萃分析，以评估 MNP 对土壤健康参数（由与作物生长、动物健康、温室气体排放、微生物多样性和污染物转移相关的 20 个指标代表）的广泛影响，以及影响是否取决于 MNP 属性。我们发现MNP暴露显着抑制了作物生物量和发芽，并降低了蚯蚓的生长和成活率。在 MNP 暴露下，土壤温室气体 (CO 2 ,N 2氧和CH 4 ) 显着增加。 MNP 暴露导致土壤细菌多样性下降。重要的是，土壤参数的影响程度取决于 MNP 剂量和大小；然而，MNP 类型（可生物降解的 MNP 和传统 MNP）没有显着差异。此外，MNPs显着降低了植物对As的吸收，但促进了植物Cd的积累。使用层次分析法，我们将 MNP 暴露对土壤健康的负面影响量化为平均值 -10.2%（-17.5% 至 -2.57%）。总体而言，该分析为评估 MNP 污染对土壤生态系统功能的潜在风险提供了新的见解。

更新日期：2024-08-16

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