U.S.-GLOBEC: NWA Georges Bank: Effects of climate variability on Calanus dormancy patterns and population dynamics in the Northwest Atlantic
U.S.-GLOBEC:NWA Georges Bank:气候变化对西北大西洋哲水仙休眠模式和种群动态的影响
基本信息
- 批准号:0535366
- 负责人:
- 金额:$ 18.25万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2005
- 资助国家:美国
- 起止时间:2005-11-15 至 2007-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Calanoid copepods are key organisms throughout the world's oceans, consuming primary and secondary production at high rates, and serving as prey for invertebrates, larval and small pelagic fish, seabirds, and marine mammals. Many of the most abundant copepods in temperate and high latitudes, including Calanus finmarchicus in the Northwest Atlantic, can spend part of their life cycle in dormancy, a state of suppressed development. During dormancy, copepods escape unproductive surface waters and reside in deep water for several months, after which they emerge and migrate to the surface, usually prior to the spring bloom. The timing and abundance of copepods emerging from dormancy set initial conditions for population growth in the active season and is likely critical for both copepod population dynamics and for feeding and growth of larval fish. Similarly, the timing of entry into dormancy and consequent reduction of prey availability in surface waters, may be important to population dynamics of surface planktivores. The physical and biological factors that control onset of and emergence from dormancy are not known for Calanus finmarchicus or other open ocean copepod species.This project aims to identify the factors that control onset of and emergence from dormancy in Calanus finmarchicus in the Northwest Atlantic using both an inter-regional comparison of dormancy response and associated environmental conditions and individual-based model (IBM) simulations. The research tests the hypothesis that inter-regional differences in population dynamics are caused by different environmental conditions acting on copepods with similar dormancy and physiological rate responses to environmental parameters. Data sets from seven regions of the Northwest Atlantic will be compiled and compared to observational bio-physical data sets to test hypotheses about dormancy control mechanisms. IBM simulations will be run in individual regions to test the plausibility of the refined dormancy control hypotheses. IBM simulations will also be run to test the sensitivity of the model to uncertainty in dormancy and physiological rate functions, and to evaluate population responses to realistic interannual variability in surface and deepwater temperature and shifts in the timing and magnitude of the spring bloom. Modeled population responses to climate variability in C. finmarchicus will be compared to similar ongoing analyses in C. pacificus and C. marshallae. The results of the proposed research will be important for understanding basic processes that influence seasonal production of a major group of plankton. This knowledge is critical to understanding the overall trophic impact of climate change on food webs of both the Northwest Atlantic and Northeast Pacific.The proposed research involves the direct participation of one Master's level graduate student and one postdoctoral student. This research represents a continuing collaboration between scientists from the University of New Hampshire and NOAA's Pacific Fisheries Environmental Laboratory (PFEL), and it includes collaborations with scientists at Dalhousie University and Canadian Department of Fisheries and Oceans Laboratories. In addition, the results expected from this proposal will be applicable to current and proposed GLOBEC copepod population modeling efforts. The information gained from this work will prove valuable to management for marine mammals (northern right whale that feeds primarily on C. finmarchicus), as well as cod, herring and other fish species on Georges Bank and in the Gulf of Maine and for the understanding of impacts of climate change on these species.
鱿鱼类桡足类动物是世界海洋中的关键生物,它们以很高的速度消耗初级和次级产品,并成为无脊椎动物、幼体和小型远洋鱼类、海鸟和海洋哺乳动物的猎物。温带和高纬度地区许多数量最多的桡足类动物,包括西北大西洋的Calanus finmarchicus,它们生命周期的一部分时间都处于休眠状态,这是一种抑制发育的状态。在休眠期间,桡足类动物逃离非生产性的地表水,在深水中居住几个月,之后它们出现并迁移到水面,通常在春季开花之前。桡足动物从休眠中出现的时间和丰度为活跃期的种群增长设定了初始条件,可能对桡足动物种群动态和幼鱼的摄食和生长都至关重要。同样,进入休眠的时间和随之而来的地表水中猎物数量的减少,可能对表层浮游动物的种群动态很重要。控制Calanus finmarchicus或其他开放海洋桡足类物种休眠和苏醒的物理和生物因素尚不清楚。本项目旨在通过休眠反应和相关环境条件的区域间比较以及基于个体的模型(IBM)模拟,确定控制西北大西洋Calanus finmarchicus休眠开始和从休眠中出现的因素。本研究验证了区域间种群动态差异是由不同的环境条件作用于具有相似休眠和对环境参数的生理速率响应的桡足类造成的。来自西北大西洋七个地区的数据集将被汇编并与观测生物物理数据集进行比较,以检验关于休眠控制机制的假设。IBM模拟将在个别地区运行,以测试改进的休眠控制假设的合理性。IBM模拟还将运行,以测试该模型对不确定性休眠和生理速率函数的敏感性,并评估种群对水面和深水温度的实际年际变化以及春季开花时间和幅度的变化的反应。模拟的C. finmarchicus种群对气候变率的响应将与C. pacificus和C. marshallae正在进行的类似分析进行比较。拟议的研究结果对于了解影响主要浮游生物群体季节性生产的基本过程将是重要的。这一知识对于理解气候变化对西北大西洋和东北太平洋食物网的整体营养影响至关重要。本研究由一名硕士研究生和一名博士后直接参与。这项研究代表了新罕布什尔大学和美国国家海洋和大气管理局太平洋渔业环境实验室(PFEL)的科学家之间的持续合作,它还包括与达尔豪斯大学和加拿大渔业和海洋实验室的科学家的合作。此外,本提案的预期结果将适用于当前和拟议的GLOBEC桡足动物种群建模工作。从这项工作中获得的信息将证明对海洋哺乳动物(主要以C. finmarchicus为食的北露脊鲸)以及乔治海岸和缅因湾的鳕鱼、鲱鱼和其他鱼类的管理以及对气候变化对这些物种的影响的理解是有价值的。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Jeffrey Runge其他文献
Jeffrey Runge的其他文献
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{{ truncateString('Jeffrey Runge', 18)}}的其他基金
Collaborative Research: Mechanisms supporting persistence of a key plankton species during climate change on the Northwest Atlantic continental shelf
合作研究:支持西北大西洋大陆架气候变化期间关键浮游生物物种持续存在的机制
- 批准号:
1459087 - 财政年份:2015
- 资助金额:
$ 18.25万 - 项目类别:
Standard Grant
RAPID: Effect of a Very Low NAO Event on the Abundance of the Lipid-Rich Planktonic Copepod, Calanus Finmarchicus, in the Gulf of Maine
RAPID:极低 NAO 事件对缅因湾富含脂质的浮游桡足类 Calanus Finmarchicus 丰度的影响
- 批准号:
1235920 - 财政年份:2012
- 资助金额:
$ 18.25万 - 项目类别:
Standard Grant
Ocean Acidification-Category 1- Impact of ocean acidification on survival of early life stages of planktonic copepods in the genus Calanus in the northern
海洋酸化-类别1-海洋酸化对北部哲水蚤属浮游桡足类早期生命阶段生存的影响
- 批准号:
1041081 - 财政年份:2010
- 资助金额:
$ 18.25万 - 项目类别:
Standard Grant
Collaborative Research: Life histories of species in the genus Calanus in the North Atlantic and North Pacific Oceans and responses to climate forcing
合作研究:北大西洋和北太平洋哲水蚤属物种的生活史以及对气候强迫的响应
- 批准号:
0815336 - 财政年份:2008
- 资助金额:
$ 18.25万 - 项目类别:
Standard Grant
U.S.-GLOBEC: NWA Georges Bank: Effects of climate variability on Calanus dormancy patterns and population dynamics in the Northwest Atlantic
U.S.-GLOBEC:NWA Georges Bank:气候变化对西北大西洋哲水仙休眠模式和种群动态的影响
- 批准号:
0733910 - 财政年份:2007
- 资助金额:
$ 18.25万 - 项目类别:
Standard Grant
US-GLOBEC NEP Phase IIIa: Efffects of Climate Variability on Calanus Dormancy Patterns and Population Dynamics within the California Current
US-GLOBEC NEP 第三阶段:气候变化对加州洋流内的哲水蚤休眠模式和种群动态的影响
- 批准号:
0733881 - 财政年份:2007
- 资助金额:
$ 18.25万 - 项目类别:
Standard Grant
U.S. GLOBEC: NWA Georges Bank - Processes Controlling Abundance of dominant copepod species on Georges Bank: Local dynamics and large-scale forcing.
美国 GLOBEC:NWA 乔治滩 - 控制乔治滩上优势桡足类物种丰度的过程:局部动态和大规模强迫。
- 批准号:
0733907 - 财政年份:2007
- 资助金额:
$ 18.25万 - 项目类别:
Standard Grant
U.S. GLOBEC: NWA Georges Bank - Processes Controlling Abundance of dominant copepod species on Georges Bank: Local dynamics and large-scale forcing.
美国 GLOBEC:NWA 乔治滩 - 控制乔治滩上优势桡足类物种丰度的过程:局部动态和大规模强迫。
- 批准号:
0605499 - 财政年份:2006
- 资助金额:
$ 18.25万 - 项目类别:
Standard Grant
US-GLOBEC NEP Phase IIIa: Efffects of Climate Variability on Calanus Dormancy Patterns and Population Dynamics within the California Current
US-GLOBEC NEP 第三阶段:气候变化对加州洋流内的哲水蚤休眠模式和种群动态的影响
- 批准号:
0531555 - 财政年份:2005
- 资助金额:
$ 18.25万 - 项目类别:
Standard Grant
相似海外基金
U.S.-GLOBEC: NWA Georges Bank: Effects of climate variability on Calanus dormancy patterns and population dynamics in the Northwest Atlantic
U.S.-GLOBEC:NWA Georges Bank:气候变化对西北大西洋哲水仙休眠模式和种群动态的影响
- 批准号:
0733910 - 财政年份:2007
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U.S. GLOBEC: NWA Georges Bank - Processes Controlling Abundance of dominant copepod species on Georges Bank: Local dynamics and large-scale forcing.
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