Quantifying and partitioning spatiotemporal variability in secondary production and trophic transfer efficiency in pelagic marine ecosystems
量化和划分中上层海洋生态系统二次生产和营养转移效率的时空变化
基本信息
- 批准号:RGPIN-2020-07077
- 负责人:
- 金额:$ 2.4万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2021
- 资助国家:加拿大
- 起止时间:2021-01-01 至 2022-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This research aims to measure two factors that, although critically important to understanding marine food chains, have rarely been measured in Canadian waters. The first is known as "secondary production", which is the rate at which zooplankton are produced. Zooplankton are tiny animals (mostly less than 1 cm in size) that feed on single-celled plants (called "phytoplankton") at the base of most marine food chains. Zooplankton are consumed by larger animals - including many young and adult fish, certain marine mammals, and even seabirds. The second factor is referred to as the "trophic transfer efficiency" (TTE). In short, this is an estimate of how much energy is transferred between different levels of the food chain (e.g. from phytoplankton to zooplankton). The higher the TTE the more energy that is transferred up the food chain, and the greater the amount of fish, marine mammals, etc. that can be supported. These two factors are essential components that underlie the mathematical models that oceanographers use to study marine food webs, and to predict how such food webs may change in the future. However, mainly for technical reasons, neither factor is measured directly in the ocean. Instead, modelers have relied on numbers drawn from simplified lab experiments or theoretical studies. My lab has developed a method to directly measure secondary production, based on measuring an enzyme (called chitobiase) that most zooplankton release into the water as they grow. When put together with measures of the rate of phytoplankton growth (known as "primary production" - something that oceanographers have been able to do since the 1960s), we have been able to produce the first direct estimates of TTE in a natural field setting. Over the next five years we will expand our work to begin exploring how secondary production and TTE vary between locations and at different timescale (i.e. seasonally, between years, etc.) off Canada's west coast. The data we generate will be used by researchers at Fisheries and Oceans Canada (and elsewhere) to refine their ecosystem models and improve their ability to forecast how Canada's marine resources may respond to changing ocean climates in the future.
这项研究旨在测量两个因素,尽管这两个因素对了解海洋食物链至关重要,但在加拿大水域却很少被测量。第一种被称为“二次生产”,即浮游动物的生产速度。浮游动物是一种微小的动物(大多数小于1厘米),它们以单细胞植物(称为“浮游植物”)为食,处于大多数海洋食物链的底部。浮游动物被大型动物吃掉,包括许多幼鱼和成鱼,某些海洋哺乳动物,甚至海鸟。第二个因素被称为“营养转移效率”(TTE)。简而言之,这是对在食物链的不同层次(例如,从浮游植物到浮游动物)之间转移的能量的估计。TTE越高,传递到食物链上游的能量就越多,可以支持的鱼类、海洋哺乳动物等的数量也就越多。这两个因素是海洋学家用来研究海洋食物网和预测未来食物网如何变化的数学模型的基本组成部分。然而,主要由于技术原因,这两个因素都无法在海洋中直接测量。相反,建模者依赖于从简化的实验室实验或理论研究中得出的数字。我的实验室已经开发出一种直接测量次生产物的方法,基于测量一种酶(称为壳聚糖酶),这种酶是大多数浮游动物在生长过程中释放到水中的。当结合浮游植物生长速率的测量(被称为“初级生产”——这是海洋学家自20世纪60年代以来能够做到的),我们已经能够在自然野外环境中对TTE进行第一次直接估计。在接下来的五年里,我们将扩大我们的工作范围,开始探索加拿大西海岸的二次生产和TTE在不同地点和不同时间尺度(如季节、年份等)的变化。我们生成的数据将被加拿大渔业和海洋(以及其他地方)的研究人员用来完善他们的生态系统模型,提高他们预测加拿大海洋资源如何应对未来海洋气候变化的能力。
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)
数据更新时间:{{ journalArticles.updateTime }}
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
数据更新时间:{{ journalArticles.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ monograph.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ sciAawards.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ conferencePapers.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ patent.updateTime }}
Dower, John其他文献
Dower, John的其他文献
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
{{ truncateString('Dower, John', 18)}}的其他基金
Quantifying and partitioning spatiotemporal variability in secondary production and trophic transfer efficiency in pelagic marine ecosystems
量化和划分中上层海洋生态系统二次生产和营养转移效率的时空变化
- 批准号:
RGPIN-2020-07077 - 财政年份:2022
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Quantifying and partitioning spatiotemporal variability in secondary production and trophic transfer efficiency in pelagic marine ecosystems
量化和划分中上层海洋生态系统二次生产和营养转移效率的时空变化
- 批准号:
RGPIN-2020-07077 - 财政年份:2020
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Effects of variability in food quantity and quality on the feeding, growth, and condition of larval fish under natural field conditions.
自然田间条件下食物数量和质量的变化对幼鱼摄食、生长和状况的影响。
- 批准号:
216861-2013 - 财政年份:2019
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Effects of variability in food quantity and quality on the feeding, growth, and condition of larval fish under natural field conditions.
自然田间条件下食物数量和质量的变化对幼鱼摄食、生长和状况的影响。
- 批准号:
216861-2013 - 财政年份:2015
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Effects of variability in food quantity and quality on the feeding, growth, and condition of larval fish under natural field conditions.
自然田间条件下食物数量和质量的变化对幼鱼摄食、生长和状况的影响。
- 批准号:
216861-2013 - 财政年份:2014
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Effects of variability in food quantity and quality on the feeding, growth, and condition of larval fish under natural field conditions.
自然田间条件下食物数量和质量的变化对幼鱼摄食、生长和状况的影响。
- 批准号:
216861-2013 - 财政年份:2013
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Quantifying the effects of variability in food quality on secondary production in marine ecosystems
量化食品质量变异对海洋生态系统二次生产的影响
- 批准号:
216861-2008 - 财政年份:2012
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Quantifying the effect of variability in food quality on energy transfer and secondary production in a coastal marine food web
量化食品质量变异对沿海海洋食物网能量转移和二次生产的影响
- 批准号:
403547-2011 - 财政年份:2011
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Ship Time
Quantifying the effects of variability in food quality on secondary production in marine ecosystems
量化食品质量变异对海洋生态系统二次生产的影响
- 批准号:
216861-2008 - 财政年份:2011
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
Quantifying the effects of variability in food quality on secondary production in marine ecosystems
量化食品质量变异对海洋生态系统二次生产的影响
- 批准号:
216861-2008 - 财政年份:2010
- 资助金额:
$ 2.4万 - 项目类别:
Discovery Grants Program - Individual
相似国自然基金
极性蛋白Partitioning defective3 homolog (Par3) 参与阿尔兹海默症发病以及β-淀粉样蛋白蓄积的机制研究
- 批准号:
- 批准年份:2020
- 资助金额:55 万元
- 项目类别:
相似海外基金
CAREER: Efficient Large Language Model Inference Through Codesign: Adaptable Software Partitioning and FPGA-based Distributed Hardware
职业:通过协同设计进行高效的大型语言模型推理:适应性软件分区和基于 FPGA 的分布式硬件
- 批准号:
2339084 - 财政年份:2024
- 资助金额:
$ 2.4万 - 项目类别:
Continuing Grant
AF: SMALL: Submodular Functions and Hypergraphs: Partitioning and Connectivity
AF:SMALL:子模函数和超图:分区和连接
- 批准号:
2402667 - 财政年份:2024
- 资助金额:
$ 2.4万 - 项目类别:
Standard Grant
CAREER: Problem Partitioning and Division of Labor for Human-Computer Collaboration in Engineering Design
职业:工程设计中人机协作的问题划分与分工
- 批准号:
2339546 - 财政年份:2024
- 资助金额:
$ 2.4万 - 项目类别:
Standard Grant
Partitioning-Based Learning Methods for Treatment Effect Estimation and Inference
基于分区的治疗效果估计和推理学习方法
- 批准号:
2241575 - 财政年份:2023
- 资助金额:
$ 2.4万 - 项目类别:
Standard Grant
Next Generation Infectious Disease Diagnostics: Microfluidic-Free Gigapixel PCR with Self-Assembled Partitioning
下一代传染病诊断:具有自组装分区的无微流控千兆像素 PCR
- 批准号:
10682295 - 财政年份:2023
- 资助金额:
$ 2.4万 - 项目类别:
Collaborative Research: Bayesian Residual Learning and Random Recursive Partitioning Methods for Gaussian Process Modeling
合作研究:高斯过程建模的贝叶斯残差学习和随机递归划分方法
- 批准号:
2348163 - 财政年份:2023
- 资助金额:
$ 2.4万 - 项目类别:
Standard Grant
Biophysical principles of nucleo-cytoplasmic transport
核质运输的生物物理学原理
- 批准号:
479904 - 财政年份:2023
- 资助金额:
$ 2.4万 - 项目类别:
Operating Grants
The Elemental and Isotopic Partitioning Behavior of Nitrogen During Magmatic Differentiation
岩浆分异过程中氮的元素和同位素分配行为
- 批准号:
2890693 - 财政年份:2023
- 资助金额:
$ 2.4万 - 项目类别:
Studentship
CAREER: Single-molecule dissection of the Partitioning Defective cell polarity machinery
职业:分区缺陷细胞极性机制的单分子解剖
- 批准号:
2237451 - 财政年份:2023
- 资助金额:
$ 2.4万 - 项目类别:
Continuing Grant
Global Impacts of Phase State on Secondary Organic Aerosol Partitioning
相态对二次有机气溶胶分配的总体影响
- 批准号:
2246502 - 财政年份:2023
- 资助金额:
$ 2.4万 - 项目类别:
Standard Grant