Abundans av humlor och honungsbin i jordbrukslandskap med eller utan blomrems...

Wild bee declines in agricultural landscapes have led farmers to supplement crops with honey bees. Simultaneously, environmental subsidy and conservation programmes have...农业景观内野生蜂种群数量的下降，促使农户通过放养蜜蜂（honey bees）来补充作物授粉需求。与此同时，环境补贴与保育项目已……