The Role of Phaeodarian Radiolarians in Antarctic BiologicalOceanic Processes

斐奥达放射虫在南极生物海洋过程中的作用

• 批准号: 8715974
• 负责人: Marcia Gowing
• 金额: $ 7.81万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-04-15 至 1990-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8715974&HistoricalAwards=false
• 关键词: Role; Phaeodarian; Radiolarians; Antarctic; BiologicalOceanic

Phaeodarian radiolarians are planktonic protozoans that play a role in oceanic carbon and silica cycles. Phaeodarians have been largely ignored in Antarctic waters because their distributions are so different from those of other protozoans. They have several characteristics that make them unique among protozoans and potentially important in the Southern Ocean. Phaeodarians consume a wide variety of foods from bacteria to small metazoans, especially siliceous cells and particles. When phaeodarians die, their siliceous skeletons are more susceptible to dissolution than polycystine skeletons. In Antarctic waters where large phaeodarians can be more abundant than in other oceans, a large phaeodarian below the euphotic zone represents a substantial amount of silica. Phaeodarians are also potential links between nanoplankton populations and macrozooplankton. Gowing will determine the abundance and distribution of phaeodarians and polycystines, and investigate the feeding biology of phaeodarians by vacule content analysis and measurement of feeding rates. These investigations will be the first steps in determining the importance of phaeodarians in Antarctic carbon and silica cycles and in food webs.

Phaeodarian放射虫是浮游原生动物， 海洋碳和硅循环。 在很大程度上， 在南极沃茨被忽视，因为它们的分布是如此 与其他原生动物不同。 他们有几 这些特征使它们在原生动物中独一无二， 在南大洋很重要。 Phaeodarians消费各种各样的 从细菌到小型后生动物的食物，尤其是硅质细胞 和粒子。 当phaeodarians死了，他们的硅质骨骼 比多胱氨酸骨架更容易溶解。 在 南极洲的沃茨，那里的大型浮游动物比南极洲的 在其他海洋中，真光层以下的一个大的phaeodarian代表了一个 大量二氧化硅。 Phaeodarians也是潜在的联系 微型浮游生物和大型浮游动物之间的关系。 高英将 确定phaeodarians的丰度和分布， 多胱氨酸，并调查摄食生物学的phaeodarians， 空泡含量分析和补料速率的测量。 这些 调查将是确定重要性的第一步， 南极碳和硅循环和食物网中的phaeodarians。