Reduced bacterial network complexity in agricultural soils after application of the neonicotinoid insecticide thiamethoxam
Environmental Pollution, ISSN: 0269-7491, Vol: 274, Page: 116540
2021
- 31Citations
- 39Captures
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Metrics Details
- Citations31
- Citation Indexes31
- 31
- CrossRef29
- Captures39
- Readers39
- 39
Article Description
Pesticides may alter soil microbial community structure or diversity, but their impact on microbial co-occurrence patterns remains unclear. Here, the effect of the widely used neonicotinoid insecticide thiamethoxam on the bacterial community in five arable soils was deciphered using the 16S rRNA gene amplicon sequencing technique. The degradation half-life of thiamethoxam in nonsterilized soils was significantly lower than that in sterilized soils, suggesting a considerable contribution from biodegradation. Soil bacterial community diversity diminished in high concentration thiamethoxam treatment and its impact varied with treatment concentration and soil type. Bacterial co-occurrence network complexity significantly decreased after exposure to thiamethoxam. Under thiamethoxam stress, the relative changes in bacterial co-occurrence networks were closely related (the majority of p -values < 0.05) to the soil physicochemical properties, yet the diversity and dominant phyla were slightly related (the majority of p -values > 0.05). Additionally, three bacterial genera, Sphingomonas, Streptomyces, and Catenulispora, were identified to be relevant to the degradation of thiamethoxam in soils. This finding deciphers the succession of the bacterial community under thiamethoxam stress across multiple soils, and emphasizes the potential role of physicochemical properties in regulating the ecotoxicological effect of pesticides on the soil microbiome.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0269749121001184; http://dx.doi.org/10.1016/j.envpol.2021.116540; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85100105922&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/33540259; https://linkinghub.elsevier.com/retrieve/pii/S0269749121001184; https://dx.doi.org/10.1016/j.envpol.2021.116540
Elsevier BV
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