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

9634162 SIERACKI该项目的具体重点将是定量描述微型和微型浮游生物的贡献（即， 植物和动物，2-200微米大小）猎物领域的招聘目标桡足类种群乔治银行。研究人员假设，从缅因州湾和大南海峡平流进入河岸的早期桡足类动物在河岸上经历了相对于来源地区丰富的食物环境。该项目将研究哲水蚤桡足类哲水蚤和伪哲水蚤属的无节幼体N3-N6阶段对微型和微型浮游生物的消耗。在：1）大南海峡和缅因州湾的源区，其中平流状态向乔治浅滩提供水（可能还有桡足类）; 2）接受这些输入的岸上区域，包括东北峰的增产区域; 3）将浅滩顶部与南侧较深沃茨分开的潮汐前缘两侧的区域。这项研究的重点是哲水蚤和伪哲水蚤，因为这些物种占主导地位的浮游动物生物量的乔治银行在1月至6月期间。将研究无节幼体阶段，因为这些阶段是桡足类招募到人口。 将在大南海峡和缅因州南部海湾进行实地采样，因为这些地方是水和浮游动物平流输入岸顶的地点。 该项目是美国GLOBEC西北大西洋实地研究第二阶段计划的一部分。 ***

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. ***