Collaborative Research: U.S. GLOBEC: NEP Phase IIIb-CGOA: Links between climate and planktonic food webs

合作研究：美国 GLOBEC：NEP 第三阶段 b-CGOA：气候与浮游食物网之间的联系

• 批准号: 0639449
• 负责人: Russell Hopcroft
• 金额: $ 31.88万
• 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: 2006
• 资助国家: 美国
• 起止时间: 2006-09-15 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0639449&HistoricalAwards=false
• 关键词: Collaborative; Research; U.S.; GLOBEC; NEP

The organizing theme of this project are the two food-web modes of the planktonic community of the Coastal Gulf of Alaska (CGoA): small cell-dominated (prokaryotes, pico- and nanoflagellates) or large cell-dominated (primarily chain diatoms); that these modes are dictated by physical and biological conditions, both bottom-up and top-down; and that each mode has different consequences for the production of GLOBEC target organisms, with one system primarily supporting large copepods and the other system primarily supporting the microbial food web and the mucous-net feeding zooplankton (larvaceans and pteropods) that are prime prey for juvenile salmon. The interdisciplinary team will synthesize the physical, chemical, and biological data collected by GLOBEC NEP to address this central conceptual model of the linkages between environmental forcing (including climate change) and ecosystem state.The research plan is organized into three interacting sectors of synthesis: (1) Describe the planktonic food web in the CGoA study region. (2) Provide an integrated view of conditions in the CGoA during each of the field years (1998-2004), and place these conditions in a multi-decadal climate context using longer-term environmental data sets. (3) Combine the environmental description for each year with food web structural/ and functional relationships to: (a) describe interannual variations in primary and secondary production; (b) investigate probable mechanisms driving these variations; and (c) determine the consequences for target organisms: Neocalanus spp., euphausiids and juvenile pink salmon. Box, statistical and 1-D ecosystem models will be employed to address a range of these questions about climate-food web linkages.

该项目的组织主题是阿拉斯加沿海海湾（CGoA）浮游生物群落的两种食物网模式：小细胞为主（原核生物，皮科和纳米鞭毛虫）或大细胞为主（主要是链状硅藻）;这些模式是由物理和生物条件决定的，既有自下而上的，也有自上而下的;并且每种模式对GLOBEC靶生物的产生具有不同的后果，其中一个系统主要支持大型桡足类，另一个系统主要支持微生物食物网和粘液网喂养浮游动物（幼虫类和翼足类）是幼鲑鱼的主要猎物。跨学科团队将综合GLOBEC NEP收集的物理，化学和生物数据，以解决环境强迫（包括气候变化）和生态系统状态之间联系的核心概念模型。研究计划分为三个相互作用的综合部门：（1）描述CGoA研究区域的水生食物网。(2)提供对每个实地年（1998-2004年）中气候变化影响区状况的综合看法，并使用长期环境数据集将这些状况置于多十年气候背景下。(3)联合收割机将每年的环境描述与食物网结构/和功能关系结合起来，以便：（a）描述初级和次级生产的年际变化;（B）调查驱动这些变化的可能机制;（c）确定对目标生物的影响：新哲水蚤属，磷虾和幼粉鲑。将采用方框、统计和一维生态系统模型来解决有关气候-粮食网联系的一系列问题。