DISSERTATION RESEARCH: Tracking Ecosystem Nitrogen Cycling in Black Spruce Forests with Novel15N Measurements
论文研究:利用新颖的 15N 测量追踪黑云杉森林的生态系统氮循环
基本信息
- 批准号:0909764
- 负责人:
- 金额:$ 1.48万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2009
- 资助国家:美国
- 起止时间:2009-09-01 至 2010-11-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The dynamics of many terrestrial and aquatic ecosystems are controlled by the availability of nitrogen (N), which is often in short supply in the environment. Human activities are increasing N availability in ecosystems both by increasing N inputs through fertilizer addition or atmospheric deposition, and by speeding up internal recycling of N as a result climate warming or landscape modification. While more N can increase biological productivity, this has a significant impact on the structure and function of natural ecosystems that have been shaped by low nutrient conditions for thousands of years. Recently, researchers have sought to use stable isotopes of N --a measurement method that can distinguish between different forms of N-- in plant leaves to understand ecosystem N dynamics. Relatively straightforward measurements of leaf N isotopes at a single point in time record the net effect of multiple complex biological and physical transformations that occur over time as N moves throughout whole ecosystems. This doctoral dissertation research project will make mechanistic measurements of N cycling across a range of Alaskan black spruce forests to provide an underpinning to the interpretation of leaf N isotope made at the same sites. Here, natural gradients of soil fertility in combination with experimental fertilizer additions and analytical modeling will be used to explore and interpret the patterns of leaf N isotopes. These results will help inform the response of natural ecosystems to a changing N cycle. The graduate student, in addition to performing research, will be mentoring and undergraduate research assistant. This study will help better understand the impact of climate change on natural ecosystems.
许多陆地和水生生态系统的动态受到氮(N)有效性的控制,而环境中的氮往往是短缺的。人类活动正在通过增加化肥或大气沉积来增加氮的投入,以及通过加快气候变暖或景观改变导致的氮的内部循环,来增加生态系统中的氮素有效性。虽然更多的氮可以提高生物生产力,但这对数千年来因低营养条件而形成的自然生态系统的结构和功能产生了重大影响。最近,研究人员试图使用N的稳定同位素--一种可以区分植物叶片中不同形态N-的测量方法--来了解生态系统N的动态。在单个时间点对叶片N同位素的相对直接测量记录了随着N在整个生态系统中的移动而随着时间的推移发生的多种复杂的生物和物理变化的净影响。这项博士论文研究项目将对一系列阿拉斯加黑云杉森林中的N循环进行机械测量,为解释在相同地点进行的树叶N同位素提供基础。在这里,土壤肥力的自然梯度,结合实验化肥添加和分析模型,将被用来探索和解释叶片N同位素的模式。这些结果将有助于了解自然生态系统对变化的N循环的反应。这名研究生除了从事研究外,还将担任导师和本科生研究助理。这项研究将有助于更好地了解气候变化对自然生态系统的影响。
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 }}
Edward Schuur其他文献
Edward Schuur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('Edward Schuur', 18)}}的其他基金
LTREB Renewal: The Arctic Carbon and Climate (ACCLIMATE) Observatory: Tundra Ecosystem Carbon Balance and Old Carbon Loss as a Consequence of Permafrost Degradation
LTREB 更新:北极碳与气候 (ACCLIMATE) 观测站:苔原生态系统碳平衡和多年冻土退化后果造成的旧碳损失
- 批准号:
2309467 - 财政年份:2023
- 资助金额:
$ 1.48万 - 项目类别:
Continuing Grant
Doctoral Dissertation Research: The impact of permafrost thaw on the fate and magnitude of carbon aquatic transport from Arctic tundra soil
博士论文研究:永久冻土融化对北极苔原土壤碳水运输的命运和程度的影响
- 批准号:
2310630 - 财政年份:2023
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
MRI: Acquisition of equipment for an integrated gas analysis and labeling radiocarbon system with a focus on Arctic carbon and geochronology
MRI:采购集成气体分析和标记放射性碳系统的设备,重点关注北极碳和地质年代学
- 批准号:
1919506 - 财政年份:2019
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
Collaborative Research: Permafrost Carbon Network: Synthesizing flux observations for benchmarking model projections of permafrost carbon exchange
合作研究:永久冻土碳网络:综合通量观测结果以用于永久冻土碳交换的基准模型预测
- 批准号:
1931333 - 财政年份:2019
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
NNA: LTREB: The Arctic Carbon and Climate (ACCLIMATE) Observatory: Tundra Ecosystem Carbon Balance and Old Carbon Loss as a Consequence of Permafrost Degradation
NNA:LTREB:北极碳与气候 (ACCLIMATE) 观测站:苔原生态系统碳平衡和多年冻土退化造成的旧碳损失
- 批准号:
1754839 - 财政年份:2018
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
DISSERTATION RESEARCH: Carbon Cycle Changes in a Changing Climate: Using 13C and 14C to Partition Ecosystem Respiration in Tundra Undergoing Permafrost Thaw
论文研究:气候变化中的碳循环变化:利用 13C 和 14C 来划分永久冻土解冻苔原中的生态系统呼吸
- 批准号:
1011284 - 财政年份:2010
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
Collaborative Research: RCN: Vulnerability of Permafrost Carbon
合作研究:RCN:永久冻土碳的脆弱性
- 批准号:
0955713 - 财政年份:2010
- 资助金额:
$ 1.48万 - 项目类别:
Continuing Grant
CAREER: Experimental Warming, Permafrost Thawing, and the Loss of Old Carbon from Tundra: Radiocarbon Research and Education to Understand Ecosystem Feedbacks to Climate Change
职业:实验变暖、永久冻土融化和苔原旧碳的流失:放射性碳研究和教育,以了解生态系统对气候变化的反馈
- 批准号:
0747195 - 财政年份:2008
- 资助金额:
$ 1.48万 - 项目类别:
Continuing Grant
The Carbon Balance of Arctic Tundra in Response to Permafrost Thawing: Using Radiocarbon to Detect the Loss of Old Soil Carbon
北极苔原对永久冻土融化的碳平衡:利用放射性碳检测旧土壤碳的损失
- 批准号:
0516326 - 财政年份:2005
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
Collaborative Research: Climate controls over ecosystem respiration: Using isotopes to determine the sources and age of respired carbon
合作研究:气候对生态系统呼吸的控制:利用同位素确定呼吸碳的来源和年龄
- 批准号:
0223193 - 财政年份:2002
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
相似国自然基金
Research on Quantum Field Theory without a Lagrangian Description
- 批准号:24ZR1403900
- 批准年份:2024
- 资助金额:0.0 万元
- 项目类别:省市级项目
Cell Research
- 批准号:31224802
- 批准年份:2012
- 资助金额:24.0 万元
- 项目类别:专项基金项目
Cell Research
- 批准号:31024804
- 批准年份:2010
- 资助金额:24.0 万元
- 项目类别:专项基金项目
Cell Research (细胞研究)
- 批准号:30824808
- 批准年份:2008
- 资助金额:24.0 万元
- 项目类别:专项基金项目
Research on the Rapid Growth Mechanism of KDP Crystal
- 批准号:10774081
- 批准年份:2007
- 资助金额:45.0 万元
- 项目类别:面上项目
相似海外基金
Doctoral Dissertation Research: Tracking alternatives: Experimental investigations into focus and scalar inference
博士论文研究:跟踪替代方案:焦点和标量推理的实验研究
- 批准号:
2041312 - 财政年份:2021
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
DISSERTATION RESEARCH: Tracking trends in the lichen symbiosis: do species interactions drive the latitudinal diversity gradient?
论文研究:追踪地衣共生的趋势:物种相互作用是否驱动纬度多样性梯度?
- 批准号:
1701736 - 财政年份:2017
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
Doctoral Dissertation Research: Effective Data Tracking in the Regulation of Food Supply Chains
博士论文研究:食品供应链监管中的有效数据跟踪
- 批准号:
1627757 - 财政年份:2016
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
Doctoral Dissertation Research: How Native Chinese Listeners and Second-Language Chinese Learners Process Tones in Word Recognition: An Eye-tracking Study
博士论文研究:汉语母语听众和第二语言汉语学习者如何处理单词识别中的声调:眼动追踪研究
- 批准号:
1627554 - 财政年份:2016
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
Doctoral Dissertation Research Improvement Grant: Morphosyntactic Development in a Second Language: An eye tracking study of the role of attention
博士论文研究改进补助金:第二语言的形态句法发展:注意力作用的眼动追踪研究
- 批准号:
1348964 - 财政年份:2014
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
DISSERTATION RESEARCH: Tracking Timing of Migration and Diversification Across North and South America in Agalinis (Orobanchaceae)
论文研究:追踪北美洲和南美洲 Agalinis(列当科)的迁徙和多样化时间
- 批准号:
1310863 - 财政年份:2013
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
Doctoral Dissertation Research: Using eye-tracking to study auditory comprehension in codeswitching: Evidence for the link between production and comprehension
博士论文研究:使用眼动追踪研究语码转换中的听觉理解:产生与理解之间联系的证据
- 批准号:
1124218 - 财政年份:2011
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
DISSERTATION RESEARCH: Phytolith Undulation Index: Developing a new proxy for tracking habitat openness in the Eocene-Miocene of Gran Barranca, Argentina
论文研究:植硅体波动指数:开发一种新的代理来跟踪阿根廷大巴兰卡始新世-中新世栖息地开放度
- 批准号:
1110354 - 财政年份:2011
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
Dissertation Research: Tracking the Wild: Surveillance Technology, Conservation Biology, and Human-Animal Relations, 1950-2000
论文研究:追踪野生动物:监视技术、保护生物学和人与动物的关系,1950-2000 年
- 批准号:
0646249 - 财政年份:2007
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant
Doctoral Dissertation Research: Tracking Donna Across the Northern Caribbean: Developing a Modern Analog Methodology for Paleotempestology
博士论文研究:在北加勒比海追踪唐娜:为古风暴学开发现代模拟方法
- 批准号:
0623287 - 财政年份:2006
- 资助金额:
$ 1.48万 - 项目类别:
Standard Grant