Collaborative Research: Seasonal Trophic Roles of Euphausia Superba (STRES)

合作研究：磷虾的季节性营养作用 (STRES)

• 批准号: 1142082
• 负责人: Meng Zhou
• 金额: $ 34.92万
• 依托单位: University of Massachusetts Boston
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-15 至 2016-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1142082&HistoricalAwards=false
• 关键词: Collaborative; Research; Seasonal; Trophic; Roles

Krill, Euphausia superba, is a keystone species in the Antarctic ecosystem and provides the trophic link between microscopic plankton and charismatic megafauna such as penguins and whales. Recent evidence suggests krill may not be exclusively planktonivorous, which introduces the potential of new pathways of carbon flux through krill based ecosystems. A change in our view of krill from one of being herbivores to omnivores opens up several questions.Climate induced change in the extent, thickness and duration of overlying sea ice coverage is expected to change the prey fields available to krill, and to have subsequent effects on the suite of predators supported by krill. The nature of this benthic prey?krill link, which may be crucial in those parts of the seasonal cycle other than the well studied spring bloom, is yet to be determined. DNA techniques will be used to identify and quantify the prey organisms. This project will measure the in situ feeding ecology and behavior of krill and, ultimately, the success of this key species. An overall goal isto investigate seasonal changes in Euphausia superba in-situ feeding and swimming behavior in the Wilhelmina Bay region of the Western Antarctic Peninsula (WAP) area, known to be a region of changing climate. Understanding the biological impacts of climate change is important to societal and economic goals. The project scientists will additionally team with a marine and environmental reporting group to design presentations for an annual journalist meeting.

Euphausia Superba的Krill是南极生态系统中的Keystone物种，并提供了微观浮游生物与超凡魅力的Megafauna（例如企鹅和鲸鱼）之间的营养联系。最近的证据表明，磷虾可能不完全是浮游生物，这引入了通过基于磷虾的生态系统的碳通量新途径的潜力。 我们对磷虾从食草动物到杂食动物的看法发生了变化。预计，诱发的诱发程度，厚度和持续时间的变化有望改变磷虾可用的猎物田，并对奎Krill支持的捕食者套件产生后续作用。这个底栖猎物的性质？磷虾链路（在研究良好的春季开花以外的季节周期中可能至关重要）尚未确定。 DNA技术将用于识别和量化猎物生物。该项目将衡量磷虾的原位进食生态和行为，最终是该关键物种的成功。总体目标是调查在南极半岛（WAP）地区威廉纳湾地区（WAP）地区的Euphausia Superba Superba喂食和游泳行为的季节性变化，该地区已知是气候变化的地区。了解气候变化的生物学影响对于社会和经济目标很重要。该项目科学家还将与一个海洋和环境报告小组合作，为年度记者会议设计演讲。