Tracking the Seasonal Contribution of Algal Fatty Acids to the Arctic Marine System

追踪藻类脂肪酸对北极海洋系统的季节性贡献

• 批准号: 0902177
• 负责人: Matthew Wooller
• 金额: $ 61.79万
• 依托单位: University of Alaska Fairbanks Campus
• 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: 2009-09-15 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0902177&HistoricalAwards=false
• 关键词: Tracking; Seasonal; Contribution; Algal; Fatty

The Bering Sea has one of the highest seasonal sea ice regimes in the Arctic and one of the highest rates of observed change. Cascading effects of seasonal changes in sea ice are expected to influence primary production and propagate through marine ecosystems in the Arctic. Funds are provided to support a transformative approach to better track the complex seasonal interdependencies between arctic marine primary production and arctic marine food web components in the Bering Sea. The Principal Investigators will track the seasonal, proportional contributions of specific biomarkers derived from the two main primary producers, sea ice algae and open ocean phytoplankton, into higher trophic levels (sympagic, pelagic and benthic invertebrates and ice seals) in the Bering Sea. The overall goal of this proposal relates to providing an exceptional level of ecological detail by: 1) tracing the seasonal inputs of specific fatty acid biomarkers deriving from sea ice alga and open ocean phytoplankton through the marine food web using sophisticated fatty acid profiling and novel compound-specific stable isotope analyses (CSIA); 2) tracing the seasonal (spring and summer) changes in the proportions of these biomarkers in sympagic, pelagic and benthic arctic marine invertebrates; 3) which are an important subsistence resource to Alaskan Native communities in the region. Their detailed and seasonal perspective will contribute to ongoing food web studies in the Bering Sea (e.g., the Bering Ecosystem Study and Bering Sea Integrated Ecosystem Research Program - BEST/BSIERP, funded by the NSF and North Pacific Research Board), including research being conducted by the Center for Alaska Native Health Research (CANHR) on marine subsistence resources used by Alaskan Native communities.

白令海是北极季节性海冰状况最高的地区之一，也是观测到的变化率最高的地区之一。海冰季节性变化的连锁效应预计将影响初级生产并通过北极海洋生态系统传播。提供资金支持采取变革性方法，以更好地跟踪白令海北极海洋初级生产和北极海洋食物网组成部分之间复杂的季节性相互依赖性。主要研究人员将跟踪来自两个主要初级生产者（海冰藻类和公海浮游植物）的特定生物标志物对白令海较高营养水平（共生、中上层和底栖无脊椎动物和冰海豹）的季节性、比例贡献。该提案的总体目标涉及通过以下方式提供特殊水平的生态细节：1）使用复杂的脂肪酸分析和新型化合物，通过海洋食物网追踪来自海冰藻和开放海洋浮游植物的特定脂肪酸生物标志物的季节性输入-特定稳定同位素分析（CSIA）； 2) 追踪交生、中上层和底栖北极海洋无脊椎动物中这些生物标志物比例的季节性（春季和夏季）变化； 3) 这是该地区阿拉斯加原住民社区的重要生存资源。他们详细和季节性的视角将有助于白令海正在进行的食物网研究（例如，白令海生态系统研究和白令海综合生态系统研究计划 - BEST/BSIERP，由 NSF 和北太平洋研究委员会资助），包括正在进行的研究阿拉斯加原住民健康研究中心 (CANHR) 对阿拉斯加原住民社区使用的海洋生存资源进行了调查。