Planning Visit: U.S.-Danish Research on Diversity and Toxin Production of Pseudo-nitzschia Species in Sub-Arctic and Arctic Regions with Focus on Iron Enriched Regions.

计划访问：美国-丹麦对亚北极和北极地区拟菱形藻物种多样性和毒素产生的研究，重点关注富铁地区。

• 批准号: 0922684
• 负责人: Sibel Bargu Ates
• 金额: $ 0.94万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-05-01 至 2010-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0922684&HistoricalAwards=false
• 关键词: Planning; Visit; U.S.; Danish; Research

OISE 0922684BarguRelatively little is know about the distribution of marine diatom, Pseudo-nitzschia, in offshore, oceanic environments and corresponding ecosystem-wide consequences associated with the diatom?s potential production of the toxic Domoic Acid (DA). Though this research planning visit, Sibel Bargu and a graduate student from Louisiana State University and A & M College will initiate a collaborative project with Danish partner, Nina Lundholm at the University of Copenhagen. They intend to study diversity and toxin production of the Pseudo-nitzschia species in sub-Arctic and Arctic regions with a particular focus on iron enriched regions. Accurate species identification and molecular studies of this source organism are needed to further evaluate the ecology and toxin production of the taxa. The U.S. principal investigator?s strengths in ecological measurements of DA in iron rich waters, seaward of continental margins, complement the Danish partner?s extensive knowledge of systematics and molecular biology in Artic and sub-Arctic locations. Together the international team will begin work to confirm the ultimate identity of the Pseudo-nitzschia species by using electron microscopy and genomic analysis. Their efforts are expected to begin to reveal more about the production and transfer of DA through food chains in places like the Gulf of Alaska and Greenlandic waters, with the long-term goal of documenting Pseudo-nitzschia distribution and toxicity in world oceans. This research visit fulfills the program objective of advancing basic knowledge of this genius and the relative toxicity of strains by enabling experts in the United States and Europe to share research resources and plan beneficial projects in areas of strong mutual interest and competence. Broader impacts include providing one Louisiana State University graduate student with an early career introduction to forefront international collaboration and field work. Based on previous observations, team members conclude that iron enrichment may selectively promote growth of the toxin producing strains. Therefore, new results could identify potential DA hazards that should be considered in iron fertilization experiments designed to remove carbon dioxide from the atmosphere through sequestration in deep oceans.

OISE 0922684 BARGURELELED BARGURELELIAD对海洋硅藻，伪nitzschia，在海上，海洋环境以及与硅氧毒性毒性多毒剂潜在产生相关的后果（DA）的潜在产生相关的后果。尽管这次研究计划访问，但路易斯安那州立大学的Sibel Bargu和A＆M学院的一名研究生将与哥本哈根大学的丹麦合作伙伴Nina Lundholm进行合作项目。 他们打算研究亚北极和北极区域中伪nitzschia物种的多样性和毒素产生，特别关注富含铁的区域。需要对该来源生物进行准确的物种鉴定和分子研究，以进一步评估分类单元的生态和毒素产生。 美国首席研究者在富铁水域的生态测量中的优势，大陆边缘的海洋，补充了丹麦伙伴对艺术和亚北极地区的系统学和分子生物学的广泛了解。 国际团队将共同开始使用电子显微镜和基因组分析来确认伪nitzschia物种的最终身份。 预计他们的努力将开始更多地揭示在阿拉斯加湾和格陵兰水域等地方通过食品链的生产和转移，其长期目标是记录世界海洋中伪尼兹的分布和毒性。 这项研究的访问实现了计划的目标，即通过使美国和欧洲的专家能够共享研究资源并计划具有强大的共同利益和能力的领域的有益项目，从而促进了该天才的基本知识和菌株的相对毒性。 更广泛的影响包括为一名路易斯安那州立大学的研究生提供早期职业介绍国际合作和现场工作。 根据先前的观察，团队成员得出结论，铁富集可能有选择地促进毒素产生菌株的生长。 因此，新的结果可以鉴定出潜在的DA危害，这些危害应在铁皮实验中考虑，旨在通过深海中的隔离来清除大气中的二氧化碳。