The impacts of agricultural intensification and diet diversity on solitary bee exposure to heavy metals

文献类型： 外文期刊

第一作者： Shi, Xiaoyu

作者： Shi, Xiaoyu;Liu, Shanlin;Zhou, Qingsong;Ouyang, Fang;Chesters, Douglas;Cheng, Rui;Zhu, Chaodong;Luo, Arong;Orr, Michael;Gustave, Williamson;Ma, Changsheng;Ma, Changsheng;Zhou, Qingsong;Chesters, Douglas;Zhu, Chaodong;Luo, Arong;Wang, Mei;Zhu, Chaodong

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关键词： DNA metabarcoding; Pollinator; Brood provisions; Mason bee

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：6.4； 五年影响因子：6.8 ）

ISSN： 0167-8809

年卷期： 2025 年 394 卷

页码：

收录情况： SCI

摘要： Wild bees are crucial to the pollination of many crops and fruits. However, they face a variety of environmental stressors in agroecosystems, one of which is heavy metal pollution. While studies have assessed heavy metal exposure levels of bee in fields, studies on the effect of agricultural intensification and dietary diversity on bees' exposure to heavy metals is lacking. Across 18 study locations on smallholder farms in Quzhou, China, we measured the concentrations of heavy metals (Cr, Co, Ni, Zn, Cd, and Pb) in mason bee (Osmia excavata) brood provisions. Specifically, we investigated the effects of floral plant diversity (DNA metabarcoding on mason bee brood provisions) and agricultural intensification on mason bee exposure to heavy metals. We found that a greater percentage of farmland within a 200- and 600-meter radius led to significantly increased Pb concentration in the brood provisions for mason bees, but had no effects on the other heavy metals. The concentrations of all tested heavy metals were unaffected by the ratio of non-Brassica to Brassica plants, a genus known to accumulate heavy metals. In addition, Cr and Pb exposure by mason bee larvae was reduced where brood provisions were comprised of a greater diversity of floral plants. Thus, diversifying flower species in agricultural landscapes appears to be an approach to lower heavy metal exposure.

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