Physiological Ecology of UV-Absorbing Compunds in Antarctic Organisms

南极生物吸收紫外线化合物的生理生态学

• 批准号: 9215033
• 负责人: Deneb Karentz
• 金额: $ 8.83万
• 依托单位: University of San Francisco
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-05-01 至 1994-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9215033&HistoricalAwards=false
• 关键词: Physiological; Ecology; UV; Absorbing; Compunds

This study will contribute to our understanding of the full range of natural "sunscreens" that marine organisms have to protect themselves against ultraviolet (UV) radiation. With concerns about increased incident UV caused by global ozone depletion, it is crucial to evaluate the ecological effects of this atmospheric phenomenon on biological systems in Antarctica. Mycosporine-like amino acids (MAAs) absorb radiation from the UV portion of the solar spectrum and are commonly found in marine species. Scientific information obtained on MAAs will further our understanding of how marine organisms deal with UV exposure and continue to function within their ecosystems. Little is known about the regulatory mechanism of MAAs production in phytoplankton or the mode by which such compounds accumulate in animal tissue. Dr. Karentz proposes to determine if changes in MAA concentration represents an adaptive response to UV exposure and to examine the possible relationships between MAA content in primary producers and their consumers. The research will be accomplished by comparing MAA concentrations in selected algal and invertebrate species at different times during the annual springtime gradients of increasing day length and ozone depletion, during different life cycle stages, and under controlled light and food conditions.

这项研究将有助于我们了解海洋生物用来保护自己免受紫外线 (UV) 辐射的全方位天然“防晒霜”。 由于担心全球臭氧消耗导致入射紫外线增加，因此评估这种大气现象对南极洲生物系统的生态影响至关重要。 类菌孢素氨基酸 (MAA) 吸收太阳光谱紫外线部分的辐射，常见于海洋物种中。 在 MAA 上获得的科学信息将进一步了解海洋生物如何应对紫外线照射并继续在其生态系统中发挥作用。 关于浮游植物中 MAA 产生的调节机制或此类化合物在动物组织中积累的模式，人们知之甚少。 Karentz 博士建议确定 MAA 浓度的变化是否代表对紫外线照射的适应性反应，并研究初级生产者及其消费者的 MAA 含量之间可能的关系。 该研究将通过比较选定的藻类和无脊椎动物物种在每年春季日照长度增加和臭氧消耗梯度增加的不同时间、不同生命周期阶段以及受控光照和食物条件下的 MAA 浓度来完成。