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Silent Spring again? Song Birds Decline Linked to Environment Mercury   (寂静的春天再次来临?鸟类种群数量下降与环境汞污染相关)

Dr. Yanju Ma, University of Western Ontario, Canada.

Seminar Hall,SKL (亚热带农业生物资源保护与利用国家重点实验室学术报告厅)

16:30-17:30, November 27th (Tuesday)

Yanju Ma is an eco-toxicologist that has great interests in understanding the role of environmental stressors in ecosystems, most particularly contaminants in birds. During her Ph. D., she studied the global pollutant, mercury (Hg) in migratory songbirds at University of Western Ontario, Canada. By applying advanced methodologies (wind tunnel and stable isotopes), the studies that she carried out demonstrated the negative effects of environmental Hg on songbird migration and survival. Specifically, her findings suggest migratory songbirds that refuel at a highly contaminated stopover site can rapidly bioaccumulate Hg in blood, muscles and organs within 2-weeks, and treated birds had a reduced flight ability. Additionally, Hg exposure in the breeding areas could have a carry-over effect to reduce migration success and survival of insectivorous songbirds that undergo extensive and demanding migratory journeys.

马博士是生态毒理学家,她兴趣在于生态系统中的环境压力,尤其是体内的污染物对鸟类的影响。在博士期间,她在加拿大西安大略大学研究全球雀形目鸟类的汞污染。借助风洞设备和稳定同位素技术,研究汞污染对鸣禽迁徙和存活的负面影响。她的研究显示,迁徙鸣禽在高度污染的地方进行食物补给会导致汞在血液、肌肉和器官中在2周内快速富集,并导致鸟类的迁徙飞行能力降低。此外,繁殖地的汞暴露能带来延期效应,导致那些经历长途而艰难迁徙之旅的食虫鸣禽的迁徙成功率和存活率显著下降,从而影响鸟类的种群数量。

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