Chronic impairment of bumblebee natural foraging behaviour induced by sublethal pesticide exposure
Chronic impairment of bumblebee natural foraging behaviour induced by sublethal pesticide exposure
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DOI：
10.1111/1365-2435.12292
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发表时间：
2014-12-01
影响因子：
5.2
通讯作者：
Raine, Nigel E.
中科院分区：
文献类型：
--
作者：
Gill, Richard J.;Raine, Nigel E.
昆虫授粉是维持生物多样性和维持农作物产量的一项重要生态系统服务。群居蜜蜂是重要的昆虫传粉者，因此它们的数量在全球范围内下降是令人担忧的。尽管接触杀虫剂被认为是蜜蜂死亡的可能原因，但我们目前对这些化学物质构成的风险了解有限。虽然在环境中暴露于杀虫剂通常对个体蜜蜂没有致命影响，但最近的报告表明，亚致命性暴露会影响重要的行为特征，如觅食。然而，目前我们对自然觅食行为如何受到损害以及急性和慢性影响的相关影响知之甚少。利用射频识别(RFID)标记技术，研究了在四周的时间里，当新烟碱(吡虫啉)和/或拟除虫菊酯(-氯氟氰菊酯)单独和联合暴露时，熊蜂(Bombus Terrestris)的日常觅食模式是如何受到影响的。这是第一次提供关于长期联合和单独接触杀虫剂对田间觅食行为的时间动态的影响的数据。我们的结果表明，新烟碱暴露对整个觅食活动既有急性影响，也有慢性影响。虽然来自对照蜂群的觅食者随着经验的积累而改善了他们寻找花粉的能力，但暴露在吡虫啉下的蜜蜂的表现变得更糟：慢性行为障碍。我们还发现了证据，表明接触杀虫剂会改变觅食者对采集花粉的花卉类型的偏好。我们的发现强调了在评估杀虫剂对蜜蜂构成的风险时考虑长期暴露(在田间发生)的重要性。长期接触杀虫剂的影响可能会对种群生存和这些基本昆虫传粉者提供的授粉服务产生严重的有害后果。10.1111/(ISSN)1365-2435
Insect pollination is a vital ecosystem service that maintains biodiversity and sustains agricultural crop yields. Social bees are essential insect pollinators, so it is concerning that their populations are in global decline. Although pesticide exposure has been implicated as a possible cause for bee declines, we currently have a limited understanding of the risk these chemicals pose. Whilst environmental exposure to pesticides typically has non-lethal effects on individual bees, recent reports suggest that sublethal exposure can affect important behavioural traits such as foraging. However, at present, we know comparatively little about how natural foraging behaviour is impaired and the relative impacts of acute and chronic effects. Using Radio-Frequency Identification (RFID) tagging technology, we examined how the day-to-day foraging patterns of bumblebees (Bombus terrestris) were affected when exposed to either a neonicotinoid (imidacloprid) and/or a pyrethroid (-cyhalothrin) independently and in combination over a four-week period. This is the first study to provide data on the impacts of combined and individual pesticide exposure on the temporal dynamics of foraging behaviour in the field over a prolonged period of time. Our results show that neonicotinoid exposure has both acute and chronic effects on overall foraging activity. Whilst foragers from control colonies improved their pollen foraging performance as they gained experience, the performance of bees exposed to imidacloprid became worse: chronic behavioural impairment. We also found evidence, suggesting that pesticide exposure can change forager preferences for the flower types from which they collect pollen. Our findings highlight the importance of considering prolonged exposure (which happens in the field) when assessing the risk that pesticides pose to bees. The effects of chronic pesticide exposure could have serious detrimental consequences for both colony survival and also the pollination services provided by these essential insect pollinators. 10.1111/(ISSN)1365-2435