SGER: Science-of-Opportunity Aboard Icebreaker Oden: Bioactive trace metals in the Amundsen and Ross Seas

SGER：破冰船上的机会科学 Oden：阿蒙森海和罗斯海的生物活性微量金属

• 批准号: 0741403
• 负责人: Robert Sherrell
• 金额: $ 8.08万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-15 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0741403&HistoricalAwards=false
• 关键词: SGER; Science; Opportunity; Aboard; Icebreaker

AbstractThe research objective is (1) to determine the distributions and dynamics of a full suite of bioactive trace metals in dissolved and suspended particulate forms, along sampling transects of the Amundsen and Ross Seas. And (2) to test the sensitivity of overall cellular metal stoichiometry (metal/carbon ratios) to natural gradients in species assemblage and Fe availability. Our earlier findings from a single Ross Sea station and from a Drake Passage crossing suggest that Fe-limited phytoplankton cells are unusually enriched in Zn, Cu and Cd relative to biomass carbon, with strong implications for the biogeochemical cycling of these elements relative to carbon fluxes in the Southern Ocean. In collaboration with other researchers on the cruise, we will also measure metal stoichiometry of cells exposed to predicted 2010 temperature and carbon dioxide levels in shipboard incubation studies, as a window into possible effects of climate change on metals biogeochemistry in these regions. This proposal will support close international collaborations and lasting infrastructure development as US and Swedish scientists, and more importantly, their students, work toward shared the shared goal of understanding a region that is experiencing one of the fastest rates of climate change on the globe. Trace metal micro-nutrients are a key control on the productivity of Antarctic marine ecosystems. Our results will be made widely available through research publications and internet-available databases, and public outreach through COSEE at Rutgers University.

摘要本研究的目的是：(1)确定阿蒙森海和罗斯海取样样带中溶解和悬浮颗粒形式的一整套生物活性微量金属的分布和动态。(2)测试细胞整体金属化学计量学（金属/碳比）对物种组合和铁有效性的自然梯度的敏感性。我们早期在罗斯海站和德雷克海峡的发现表明，相对于生物量碳，铁限制的浮游植物细胞异常富集Zn、Cu和Cd，这对这些元素相对于南大洋碳通量的生物地球化学循环具有重要意义。我们还将与游轮上的其他研究人员合作，在船上的孵化研究中测量暴露于预计的2010年温度和二氧化碳水平的细胞的金属化学计量学，作为研究气候变化对这些地区金属生物地球化学可能产生的影响的窗口。这项提案将支持密切的国际合作和持久的基础设施发展，因为美国和瑞典的科学家，更重要的是，他们的学生，朝着共同的目标努力，了解这个正在经历全球气候变化最快的地区之一。微量金属营养素是控制南极海洋生态系统生产力的关键因素。我们的研究结果将通过研究出版物和互联网数据库，以及通过罗格斯大学COSEE的公共宣传广泛发布。