Abstract. Microplastic is recognized as a factor of global change affecting many environmental compartments. Agricultural soils are likely hotspots of microplastic contamination in terrestrial ecosystems and are of particular concern due to their role in food production. Microplastic has already been shown to be able to affect soil properties, but its effect on different soil types is poorly understood. Moreover, no information is available on how the presence of this pollutant can affect soil water erosion processes, which are extremely important issues in many environments. In the light of this, we performed two experiments (a microcosm and a mesocosm study) to investigate how the presence of polyester microplastic fibers affects soil physical and hydrological parameters and processes such as aggregate formation and soil erosion in three different agricultural soil types. Our data show that the effects of polyester microplastic on soil physical parameters (including soil aggregation and erosion) are strongly dependent on soil type. We found that microplastic contamination can decrease the formation of new aggregates but at the same time increase their stability in water, with effects on soil erosion stronger as the intrinsic erodibility of soil increases. Overall, our results highlight the importance of broadly exploring soil properties such as texture, mineralogy, and organic carbon content to better understand how the various soil types respond to microplastic contamination.

中文翻译：

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聚酯微塑料纤维影响土壤物理特性和侵蚀作为土壤类型的函数

摘要。微塑料被认为是影响许多环境部分的全球变化的一个因素。农业土壤可能是陆地生态系统中微塑料污染的热点，并且由于它们在粮食生产中的作用而受到特别关注。微塑料已被证明能够影响土壤特性，但其对不同土壤类型的影响知之甚少。此外，没有关于这种污染物的存在如何影响土壤水蚀过程的信息，这在许多环境中都是极其重要的问题。有鉴于此，我们进行了两个实验（微观和中观研究），以研究聚酯微塑料纤维的存在如何影响土壤物理和水文参数以及三种不同农业土壤类型中的聚集体形成和土壤侵蚀等过程。我们的数据表明，聚酯微塑料对土壤物理参数（包括土壤聚集和侵蚀）的影响在很大程度上取决于土壤类型。我们发现微塑料污染可以减少新聚集体的形成，但同时增加它们在水中的稳定性，随着土壤内在可蚀性的增加，对土壤侵蚀的影响更强。总的来说，我们的结果强调了广泛探索土壤特性的重要性，例如质地、矿物学、