Traces of a Neonicotinoid Induce Precocious Foraging and Reduce Foraging Performance in Honey Bees
Traces of a Neonicotinoid Induce Precocious Foraging and Reduce Foraging Performance in Honey Bees
复制标题
微量新烟碱类药物会诱导蜜蜂提前采食并降低采食性能
DOI：
10.1021/acs.est.9b02452
复制
发表时间：
2019-07-16
影响因子：
11.4
通讯作者：
Barron, Andrew B.
中科院分区：
文献类型：
--
作者：
Colin, Theotime;Meikle, William G.;Barron, Andrew B.
全世界对农药残留对蜜蜂及蜂群生存的影响日益关注，但农药对蜜蜂的亚致死效应如何导致蜂群衰败仍极具争议，实地数据结果参差不齐。为探究新烟碱类农药吡虫啉的微量残留如何影响蜂群的觅食表现，我们给蜜蜂安装了射频识别标签，以便追踪它们一生的飞行行为。一组蜜蜂在幼虫阶段接触到糖浆中微量浓度（5微克/千克，即十亿分之五）的吡虫啉。吡虫啉残留导致蜜蜂成年后更早开始觅食，定向飞行次数减少，一生的觅食飞行次数减少了28%。仅在幼虫阶段接触微量吡虫啉浓度就产生如此大的影响，凸显了农药残留对蜜蜂觅食表现的严重性。我们的数据表明，新烟碱类农药可能通过打破蜂群中基于年龄的正常分工平衡以及降低觅食效率来影响蜂群功能。了解这一机制将有助于制定保护蜂群健康的干预措施。
There is increasing worldwide concern about the impacts of pesticide residues on honey bees and bee colony survival, but how sublethal effects of pesticides on bees might cause colony failure remains highly controversial, with field data giving very mixed results. To explore how trace levels of the neonicotinoid pesticide imidacloprid impacted colony foraging performance, we equipped bees with RFID tags that allowed us to track their lifetime flight behavior. One group of bees was exposed to a trace concentration (5 mu g/kg, ppb) of imidacloprid in sugar syrup while in the larval stage. The imidacloprid residues caused bees to start foraging when younger as adults and perform fewer orientation flights, and reduced their lifetime foraging flights by 28%. The magnitude of the effects of a trace imidacloprid concentration delivered only during larval stage highlights the severity of pesticide residues for bee foraging performance. Our data suggest that neonicotinoids could impact colony function by imbalancing the normal age based division of labor in a colony and reducing foraging efficiency. Understanding this mechanism will help the development of interventions to safeguard bee colony health.