Glufosinate-P Herbicide Disrupts Gut Microbiota and Metabolism, Driving Osmia excavata Population Decline

文献类型： 外文期刊

第一作者： Song, Yingying

作者： Song, Yingying;Cui, Hongying;Guo, Wenxiu;Li, Lili;Lv, Suhong;Yang, Lujia;Ma, Ruohan;Cheng, Kelin;Men, Xingyuan;Ouyang, Fang;Dong, Zhaoke;Cheng, Kelin

作者机构：

关键词： solitary bees; glufosinate-P; survival crisis; gut microbiota dysbiosis; metabolic dysfunction; ecological risk assessment

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.2； 五年影响因子：6.4 ）

ISSN： 0021-8561

年卷期： 2025 年

页码：

收录情况： SCI

摘要： Solitary bees face overlooked herbicide risks. Osmia excavata, a key early spring solitary bee, is especially vulnerable during soil-contact nesting, which coincides with peak herbicide use. We evaluated sublethal effects of glufosinate-P on O. excavata. After 15-day exposure, 5-50 mg/L glufosinate-P significantly reduced survival (by 25.00-57.50%) and food intake (by 24.95-49.95%; P < 0.05). High-dose (50 mg/L) exposure disrupted gut microbiota, increasing pathogenic Serratia marcescens and depleting beneficial microbes. Metabolomics showed systemic dysfunction, with a 32.18% reduction in glutamate disrupting amino acid metabolism, biosynthesis and nutrient transport, closely associated with microbiota shifts. The dual stressors of pathogen enrichment and metabolic paralysis compromised individual fitness and colony resilience, establishing a mechanistic pathway for population decline. Glutamate depletion emerged as a key biomarker connecting glufosinate-P exposure to systemic metabolic disturbance in nontarget pollinators. These findings underscore the need to reassess herbicide practices and integrate solitary bees into pesticide risk assessments to protect pollination.

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