School of Ecology and Environmental Sciences, Yunnan University, Kunming 650500, China; State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
J Hazard Mater. 2022 Sep 5;437:129350. doi: 10.1016/j.jhazmat.2022.129350. Epub 2022 Jun 11.
Antibiotics accumulate in soils via various agricultural activities, endangering soil biota that play fundamental roles in maintaining agroecosystem function. However, the effects of land-use heterogeneity on soil biota tolerance to antibiotic stresses are not well understood. In this study, we explored the relationships between antibiotic residues, bacterial communities, and earthworm populations in areas with different land-use types (forest, maize, and peanut fields). The results showed that antibiotic levels were generally higher in maize and peanut fields than in forests. Furthermore, land use modulated the effects of antibiotics on soil bacterial communities and earthworm populations. Cumulative antibiotic concentrations in peanut fields were negatively correlated with bacterial diversity and earthworm abundance, whereas no significant correlations were detected in maize fields. In contrast, antibiotics improved bacterial diversity and richness in forest soils. Generally, earthworm populations showed stronger tolerance to antibiotics than did soil bacterial communities. Agricultural land use differentially modified the responses of the soil bacterial community and earthworm population to antibiotic contamination, and earthworms might provide an alternative for controlling antibiotic contamination.
抗生素通过各种农业活动在土壤中积累，危害在维持农业生态系统功能方面发挥着基础性作用的土壤生物群。然而，土地利用异质性对土壤生物群对抗生素胁迫的耐受能力的影响还不太清楚。在这项研究中，我们探讨了不同土地利用类型（森林、玉米和花生地）中抗生素残留、细菌群落和蚯蚓种群之间的关系。结果表明，玉米和花生地的抗生素水平普遍高于森林。此外，土地利用调节了抗生素对土壤细菌群落和蚯蚓种群的影响。花生地中累积的抗生素浓度与细菌多样性和蚯蚓丰度呈负相关，而在玉米地中则未检测到显著相关性。相比之下，抗生素提高了森林土壤中的细菌多样性和丰富度。总的来说，蚯蚓种群对抗生素污染的耐受性比土壤细菌群落更强。农业土地利用对土壤细菌群落和蚯蚓种群对抗生素污染的响应产生了不同的影响，而蚯蚓可能为控制抗生素污染提供了一种替代方法。
