“闽都嘉庚”研究生校友学术论坛暨青年论坛第一场：陈微佳博士研究生

讲座主题：Solar ultraviolet radiation inhibited copepod Acartia spinicauda feeding and induced mortality, and this damage was exacerbated by elevated pCO2

讲座时间：2023年10月14日下午14:30-16:10

讲座地点：生化C栋416会议室

主讲人简介：陈微佳，厦门大学嘉庚学院环境科学专业2016级本科生，厦门大学海洋与地球学院海洋生物专业2020级硕士生，2022级博士生。研究方向为全球环境变化海洋浮游生物生理生态学

讲座简介：Solar ultraviolet radiation (UVR) is known to impact zooplankton. However, little has been documented on the combined impacts of UVR and elevated pCO2. Here we showed that when exposed to solar UVR, the copepod Acartia spinicauda fed and survived less, though it could sense it and possess the capability to escape from UV-exposed areas. While both UV-B and UV-A impacted the copepod, it was more sensitive to UV-B. The exposure to UV-B (2.25 W·m-2, 4 h) decreased its grazing rate by about 55% and reduced its survival rate by 51% compared to visible light alone treatment even after 68 h recovery. The combination of elevated pCO2 (1000 μatm) and the UV-B decreased about 73% in the grazing rate and 65% in survival rate. It is concluded that the acidic stress associated with elevated CO2 exacerbated the lethal effects of UVR on A. spinicauda, for which decreased grazing rates and increased respiration rates should be responsible. Our results imply that the copepod suffers more from exposure to solar UVR under progressive ocean acidification.