GLOBEC 2000: Spatial and Temporal Variability of Microplankton in the Gulf of Alaska

GLOBEC 2000：阿拉斯加湾微型浮游生物的时空变化

• 批准号: 0107769
• 负责人: Evelyn Lessard
• 金额: $ 60.54万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-02-15 至 2007-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0107769&HistoricalAwards=false
• 关键词: GLOBEC; 2000; Spatial; Temporal; Variability

The focus of this project is to describe quantitatively the abundance, biomass and size-structure of the microplankton (phytoplankton and microzooplankton 200 um) prey fields as part of the Gulf of Alaska GLOBEC program. A central objective of the mesoscale studies is to determine how physical forcing affects the availability and production of zooplankton prey for juvenile pink salmon. Juvenile salmon prey (copepods, euphausiids, pteropods, amphipods) depend directly or indirectly on diverse mircroplanktonic prey, including microzooplankton (flagellates and ciliates) which have recently been recognized to be a significant dietary component of zooplankton. The size-structure, taxonomic composition and growth dynamics of the lower trophic food web are expected to be highly responsive to physical forcing and, in turn, exert strong influences on zooplankton growth, fecundity, community composition and nutritional state. Group-specific phytoplankton growth and microzooplankton grazing rates will also be measured to identify trophic pathways and responses to changing physical regimes. This study will provide critical mechanistic insight and validation for coupled biological-physical models of the Gulf of Alaska shelf ecosystem.

该项目的重点是在定量地描述微升（浮游植物和Microzooplankton 200 UM）猎物田的丰度，生物量和大小结构，这是阿拉斯加环球湾计划的一部分。 中尺度研究的一个核心目的是确定物理强迫如何影响幼年粉红色鲑鱼的浮游动物的可用性和产生。 青少年鲑鱼猎物（Copepods，Euphausiids，pteropods，Amphipods）直接或间接取决于多种型杂团捕食，包括Microzooplankton（鞭毛和纤毛），这些猎物（鞭毛和纤毛）最近被认为是浮游动物的重要饮食组成部分。 预计下营养食品网络的尺寸结构，分类组成和增长动力学对身体强迫的反应很高，进而对浮游动物的生长，生育，社区组成和营养状态产生强大的影响。 还将测量群体特异性的浮游植物生长和微Zooplankton放牧率，以识别营养途径和对变化身体状态的反应。 这项研究将为阿拉斯加货架生态系统的耦合生物物理模型提供关键的机械洞察力和验证。