Yang Xiuyuan, Wan Zuyan, Xiao Jinnan, Li Fupeng, Zhang Fudong, Zhang Zhenming
College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China.
College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China; Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China; Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Guiyang 550025, China.
J Hazard Mater. 2024 Mar 15;466:133603. doi: 10.1016/j.jhazmat.2024.133603. Epub 2024 Jan 24.
The occurrence, sources, effects, and risks of microplastics (MPs) in farmland soils have attracted considerable attention. However, the pollution and ecological characteristics of MPs in farmland soils at different levels of rocky desertification remain unclear. We collected and analyzed farmland soil samples from rocky desertification areas in Guizhou, China, ranging from no to heavy risks. We explored differences and migration of MPs across these areas, unveiled the relationship between diversity, niche, and risks of MPs, and determined influencing factors. The average abundance of soil MPs was 8721 ± 3938 item/kg, and the abundance and contamination factor (CF) of MPs escalated with the increase in rocky desertification level. Diversity, niche, and risk of soil MPs in different rocky desertification areas were significantly different. Rocky desertification caused both MP community differences and linked MP communities at different sites. Diversity and niche significantly affected MP risk (p < 0.05). Environmental factors with significant correlations (p < 0.05) with the abundance and ecological characteristics of MPs varied significantly in soils of different rocky desertification areas. This study advances our comprehension of MP pollution in farmland soils within rocky desertification areas, offering essential data and theoretical insights for the development of control strategies.
农田土壤中微塑料（MPs）的发生、来源、影响及风险已引起广泛关注。然而，不同石漠化程度的农田土壤中微塑料的污染及生态特征仍不清楚。我们采集并分析了中国贵州石漠化地区的农田土壤样本，涵盖了从无风险到高风险的不同程度。我们探究了这些区域微塑料的差异与迁移情况，揭示了微塑料的多样性、生态位与风险之间的关系，并确定了影响因素。土壤微塑料的平均丰度为8721 ± 3938个/千克，微塑料的丰度和污染因子（CF）随石漠化程度的增加而升高。不同石漠化区域土壤微塑料的多样性、生态位和风险存在显著差异。石漠化既导致了微塑料群落的差异，也使不同地点的微塑料群落相互关联。多样性和生态位显著影响微塑料风险（p < 0.05）。与微塑料丰度和生态特征具有显著相关性（p < 0.05）的环境因子在不同石漠化程度的土壤中差异显著。本研究增进了我们对石漠化地区农田土壤中微塑料污染的理解，为制定控制策略提供了重要数据和理论见解。
