Exposure to elevated temperature during development affects bumblebee foraging behavior

Bee foraging behavior provides a pollination service that has both ecological and economic benefits. However, bee population decline could directly affect the efficiency of this interaction. Among the drivers of this decline, global warming has been implicated as an emerging threat but exactly how increasing temperatures affect bee foraging behavior remains unexplored. Here, we assessed how exposure to elevated temperatures during development affects the foraging behavior and morphology of workers from commercial and wild Bombus terrestris colonies. Workers reared at 33°C had a higher visiting rate and shorter visiting time than those reared at 27°C. In addition, far fewer workers reared at 33°C engaged in foraging activities and this is potentially related to the drastic reduction in the number of individuals produced in colonies exposed to 33°C. The impact of elevated developmental temperature on wild colonies was even stronger as none of the workers from these colonies performed any ...熊蜂觅食行为所提供的传粉服务兼具生态与经济价值。然而，熊蜂种群数量的下降会直接影响这一传粉互作过程的效率。在该种群下降的诸多驱动因素中，全球变暖已被认定为一种新兴威胁，但气温升高究竟如何影响熊蜂觅食行为，目前仍未得到探明。本研究探究了发育阶段暴露于高温环境对商业化饲养与野生大地熊蜂（Bombus terrestris）蜂群工蜂的觅食行为及形态特征的影响。在33℃环境下发育的工蜂，其访花频率更高、单次访花时长较27℃环境下发育的工蜂更短。此外，33℃环境下发育的工蜂中，参与觅食活动的个体数量显著更少，这一现象或与暴露于33℃环境的蜂群所繁育的个体总数大幅减少存在关联。发育阶段高温对野生蜂群的影响更为显著，该类蜂群的工蜂未开展任何觅食活动……