Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2022-09-07 , DOI: 10.1016/j.jhazmat.2022.129943
Minying Huang 1 , Yan Zhu 1 , Yanhong Chen 1 , Yuting Liang 2
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Although biodegradable plastics are considered an environmentally-friendly alternative to conventional plastics, the effects of biodegradable microplastics (BMPs) on soil faunal communities are poorly understood, especially under field conditions. Here, we investigated the loading impacts of two conventional low-density polyethylene (LDPE) and polypropylene (PP) MPs as well as two biodegradable polylactic acid (PLA) and polybutylene succinate (PBS) MPs at concentrations of 0, 5, 10, and 15 g/m2 on soil fauna communities. After 40 d, all MP types did not affect the soil fauna communities. After 130 d, conventional MPs (LDPE-15 and PP-5) significantly increased the abundance of overall soil fauna—attributed mainly to changes in the abundance of Collembola; however, BMPs did not affect the soil fauna communities. Interestingly, MP-induced changes in the abundance and diversity of soil fauna showed a strong tendency to increase over time. Overall, these results indicate that the short-term effects of all MP types on soil faunal communities are inapparent, while soil fauna responses to conventional MPs and BMPs showed slight differences over time. Given these time-dependent soil fauna responses to MPs, we recommend an evaluation of the long-term effects of MPs on soil organisms to gain a comprehensive understanding of their effects on soil ecosystems.
中文翻译:
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土壤生态系统中的微塑料:土壤动物对常规和可生物降解微塑料田间应用的反应
尽管可生物降解塑料被认为是传统塑料的环保替代品,但人们对可生物降解微塑料 (BMP) 对土壤动物群落的影响知之甚少,尤其是在野外条件下。在这里,我们研究了浓度分别为 0、5、10 和15克/米2土壤动物群落。40 天后,所有 MP 类型均未影响土壤动物群落。130 天后,常规 MP(LDPE-15 和 PP-5)显着增加了土壤动物群的整体丰度——主要归因于跳虫丰度的变化;然而,BMP 并不影响土壤动物群落。有趣的是,MP 引起的土壤动物丰度和多样性的变化显示出随时间增加的强烈趋势。总的来说,这些结果表明所有 MP 类型对土壤动物群落的短期影响都不明显,而土壤动物对常规 MP 和 BMP 的反应随时间略有不同。鉴于这些随时间变化的土壤动物对 MP 的反应,