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: 0639093
• 负责人: Suzanne Strom
• 金额: $ 18.63万
• 依托单位: Western Washington University
• 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=0639093&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.Broader Impacts: Understanding of mechanisms controlling each of the two states of the CGoA ecosystem and the consequences for salmon will contribute to ecosystem based fishery management, especially for pink salmon. Our synthesis proposal will identify direct mechanisms, such as increased temperature, freshwater discharge, stratification and wind stress, by which climate is linked to ecosystem state and to salmon production. The detailed understanding that will come from this synthesis may allow derivation of simple indices for prediction of ecosystem state. The Exhibits Manager at the Alaska SeaLife Center in Seward has confirmed interest in developing an educational display showing the food web structure of the CGoA and how this relates to the success/production of higher trophic levels, including pink salmon.

该项目的组织主题是阿拉斯加沿海湾（CGOA）的浮游生物社区的两个食物 - 网络模式：小细胞主导的（原核，pico-和纳米氟化物）或大细胞主导的（主要是链硅）；这些模式由自下而上和自上而下的身体和生物学条件决定。并且每种模式对Globec目标生物的生产都有不同的后果，一种系统主要支持大型copods，而另一系统主要支持微生物食品网和粘液 - 网络喂养浮游动物（幼虫和pteropods）（幼虫和pteropods），这是少年鲑鱼的主要猎物。跨学科团队将综合Globec NEP收集的物理，化学和生物学数据，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中心概念模型。该研究计划组织为三个相互作用的合成阶层：（1）在CGOA研究区域中描述planktonic Food Web。 （2）在每个现场年（1998-2004）期​​间，提供CGOA中条件的综合视图，并使用长期的环境数据集将这些条件放在多年气候环境中。 （3）将每年的环境描述与食物网的结构/功能关系结合在一起：（a）描述初级和二级生产的年际变化； （b）研究推动这些变化的可能机制； （c）确定目标生物的后果：Neocalanus spp。，euphausiids和少年粉红色鲑鱼。将采用框，统计和1-D生态系统模型来解决有关气候食物网络联系的一系列问题。Boader的影响：了解控制CGOA生态系统的两个状态的机制，以及对鲑鱼的后果将有助于基于生态系统的渔业管理，尤其是粉红色的鲑鱼。我们的合成建议将确定直接机制，例如温度升高，淡水排放，分层和风应力，气候与生态系统状态和鲑鱼产生有关。来自这种综合的详细理解可能允许衍生简单索引以预测生态系统状态。苏厄德阿拉斯加海豹岛中心的展览经理证实，人们对开发一个教育展示的兴趣，显示CGOA的食物网络结构，以及这与包括粉红色鲑鱼在内的更高营养水平的成功/产生如何相关。