Effect of Ozone Depletion on Antarctic Marine Phytoplankton

近年来，在亚洲和太平洋地区观测到的大气臭氧水平下降， 南极地区的早春（9月至10月） 伴随着紫外线辐射的增加 辐射（UVR）。 紫外线辐射对浮游植物有很大的潜在危害， 构成食物网基础的微观植物 水生生态系统 该项目是对 紫外线辐射对南极海洋浮游植物的影响 慢性病的影响 将通过长达一个月的孵育实验评估紫外线辐射暴露 将在南极洲帕尔默站使用流通式 室内和天然表层海水。 浮游植物会暴露在 五种不同的UVR制度：事件，两个降低水平和两个 增强水平。 生物量、初级生产力和色素的变化 将以15天的间隔监测组合物。 的同时 在长达一个月的培养过程中，天然样品也将暴露在 在短时间间隔（2、4和8小时）内进行各种UVR处理， 评估急性紫外线辐射暴露对浮游植物的影响 生产率和颜料组成。 的这种组合 实验将解决潜在的生态后果， 特别是南极浮游植物的紫外线辐射水平增加， 对南极海洋生态系统的影响

In recent years, reduced levels of atmospheric ozone observed in the early austral spring (September - October) over the South Polar region have been accompanied by increased levels of incident ultraviolet radiation (UVR). UVR is potentially very damaging to phytoplankton, the microscopic plants which constitute the base of the food web in aquatic ecosystems. This project is a quantitative assessment of the effects of UVR on Antarctic marine phytoplankton. The impact of chronic exposure to UVR will be evaluated via a month-long incubation experiment to be conducted at Palmer Station, Antarctica using flow-through chambers and natural surface seawater. Phytoplankton will be exposed to five different UVR regimes: incident, two reduced levels and two enhanced levels. Changes in biomass, primary productivity and pigment composition will be monitored at 15-day intervals. Concurrent with the month-long incubation, natural samples will also be exposed to the various UVR treatments over short time intervals (2, 4 and 8 hours) to evaluate the effects of acute UVR exposure on phytoplankton productivity and pigment composition. Such a combination of experiments will address the potential ecological consequences of increasing levels of UVR on Antarctic phytoplankton in particular and on the Antarctic marine ecosystem in general.