Biological Consequences of Increased Ultraviolet Radiation Associated with Antarctic Ozone Depletion

由于平流层臭氧的年度季节性消耗，南极洲最近出现了紫外线辐射(UVR)通量的增加。卡伦茨将进行初步的光生物学调查，以评估紫外线照射增加对南极生态系统的影响。在春季臭氧消耗高峰期间和之后，发生的紫外线辐射的诱变潜力将使用质粒载体和大肠杆菌B-半乳糖苷酶突变筛选来量化。物种的DNA修复能力将通过非程序DNA合成的方法来评估，而耐紫外线的特性将通过观察紫外线对生长和光合作用的剂量依赖反应来评估。收集的数据将为评估紫外线辐射引起的南极群落分类结构相对于初级生产力和营养水平相互作用的可能影响提供信息。该奖项是妇女研究机会奖。

Increased fluxes of ultraviolet radiation (UVR) have recently occurred in Antarctica as a result of an annual seasonal depletion of stratospheric ozone. Karentz will conduct initial photobiological investigations for the evaluation of the impact of increased UVR exposures on Antarctic ecosystems. The mutagenic potential of incident UVR during and after the spring maximum of ozone depletion will be quantified using a plasmid vector and Escherichia coli B-galactosidase mutation screening. DNA repair capabilities of species will be evaluated by the method of unscheduled DNA synthesis, and UVR-tolerance characteristics will be assessed by observations of UVR dose-dependent responses of growth and photosynthesis. The data collected will provide information for the evaluation of the possible repercussions of UVR-initiated changes in the taxonomic structure of Antarctic communities relative to primary productivity and trophic-level interactions. This award is a Research Opportunities for Women award.