U.S.-GLOBEC: Recruitment Variability and Advective Processes on Georges Bank - Diet of Early Stage Copepods

U.S.-GLOBEC：乔治银行的招募变异性和平流过程 - 早期桡足类的饮食

• 批准号: 9634162
• 负责人: Michael Sieracki
• 金额: $ 26.1万
• 依托单位: Bigelow Laboratory for Ocean Sciences
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-15 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9634162&HistoricalAwards=false
• 关键词: U.S.; GLOBEC; Recruitment; Variability; Advective

9634162 SIERACKI The specific focus of this project will be to describe quantitatively the contribution of nano- and microplankton (i.e., plants and animala, 2-200 um in size) prey fields to recruitment of target copepod populations on Georges Bank. The PIs hypothesize that early stage copepods advected onto the Bank from the Gulf of Maine and the Great South Channel experience an enriched food environment on-Bank relative to source regions. The project will examine consumption of nano- and microplankton by naupliar stages N3-N6 of the calanoid copepods Calanus finmarchicus and Pseudocalanus spp. in: 1) source areas in the Great South Channel and the Gulf of Maine where the advective regime contributes water (and presumably copepods) to Georges Bank; 2) on-Bank regions receiving these inputs, including the region of enhanced production on the Northeast Peak; and 3) areas on either side of the tidal front separating the Bank crest from deeper waters on the Southern Flank. The study focuses on Calanus and Pseudocalanus because these species dominate the zooplankton biomass of Georges Bank during the January-June period. Naupliar stages will be studied because these are the stages at which copepods recruit to the population. Field sampling will be conducted in the Great South Channel and southern Gulf of Maine because these are sites for advective inputs of water and zooplankton onto the Bank crest. This project is a part of the U.S. GLOBEC Northwest Atlantic Field Studies, Phase 2 program. ***

该项目的具体重点将是定量描述纳米和微型浮游生物（即，植物和动物，2-200微米大小）猎物区对乔治滩目标桡足类种群招募的贡献。pi假设，早期阶段的桡足类动物从缅因湾和大南海峡平流到河岸，相对于来源地区，在河岸上经历了丰富的食物环境。该项目将研究N3-N6阶段的鹦鹉螺类桡足类Calanus finmarchicus和pseudoalanus sp.对纳米和微型浮游生物的消耗：1)大南海峡和缅因州湾的源区，平流状态为乔治海岸提供水（可能还有桡足类）；(2)接受这些投入的岸内地区，包括东北峰的增产地区；3)潮汐锋两侧的区域，将河岸顶部与南翼较深的水域分开。研究的重点是Calanus和pseudoalanus，因为这些物种在1 - 6月期间占据了乔治滩浮游动物生物量的主导地位。我们将研究桡足动物的发育阶段，因为这是桡足动物繁殖的阶段。现场采样将在南海峡和缅因湾南部进行，因为这些地方是向河岸顶部注入水和浮游动物的平流场所。该项目是美国GLOBEC西北大西洋实地研究第二阶段项目的一部分。＊＊＊