Collaborative Research: Factors Regulating Below-Ground Carbon Allocation in Terrestrial Ecosystems: A Cross-Site Experiment

合作研究:陆地生态系统地下碳分配的调节因素:跨站点实验

基本信息

  • 批准号:
    9616536
  • 负责人:
  • 金额:
    $ 19.35万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    1997
  • 资助国家:
    美国
  • 起止时间:
    1997-03-01 至 1999-03-24
  • 项目状态:
    已结题

项目摘要

Allen 9616536 Plants devote considerable energy to the production and maintenance of small-diameter roots and their associated mycorrhizal fungi. How this below-ground allocation of carbon responds to altered availability of resources such as nitrogen is fundamental to our understanding of ecosystem function. There are currently two competing theories: (1) increased N availability decreases C allocation to roots; and (2) increased N availability increases C allocation to roots. Understanding fine root production and mortality is at the heart of this conflict. The overall hypothesis of the PIs is that the type of root-mycorrhizal association is a dominant factor controlling carbon allocation to roots, root longevity and the response to root systems to changes in N availability. The PIs propose to directly and independently quantify root production and mortality, mycorrhizal community composition and abundance, root respiration, soil CO2 flux, and above-ground litterfall at four long-term study sites that represent a range of ecosystems typical of North America. The study sites capitalize on contrasts between ectomycorrhizal (EM) and arbuscular mycorrhizal (AM) conifers and hardwoods and represent a wide range of environmental conditions. Experimental additions of N are designed to address the issue of C allocation to roots at a scale that will resolve the controversy about how root growth and turnover at the ecosystem level responds to increasing N availability. By comparing and contrasting EM and AM dominated ecosystems under a variety of climatic and edaphic regimes, we will be able to make more universal statements about the factors controlling fine root turnover.
植物为小直径根及其相关菌根真菌的产生和维持投入了相当大的能量。这种地下碳分配如何响应氮等资源可用性的改变,是我们理解生态系统功能的基础。目前有两种相互竞争的理论:(1)氮有效性的增加减少了根的碳分配;(2)氮可用性的增加增加了根系的碳分配。了解细根的产生和死亡是这场冲突的核心。pi的总体假设是,根-菌根结合类型是控制根系碳分配、根系寿命和根系对氮有效性变化响应的主导因素。pi建议在代表一系列典型北美生态系统的四个长期研究地点,直接和独立地量化根产量和死亡率、菌根群落组成和丰度、根呼吸、土壤二氧化碳通量和地上凋落物。研究地点利用了外生菌根(EM)和丛枝菌根(AM)针叶树和硬木之间的对比,并代表了广泛的环境条件。试验添加N旨在解决C在一定规模上分配给根系的问题,这将解决关于生态系统水平上根系生长和周转如何响应氮有效性增加的争议。通过比较和对比不同气候和土壤条件下EM和AM主导的生态系统,我们将能够对控制细根周转的因素做出更普遍的陈述。

项目成果

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Michael Allen其他文献

Integrating Deep Reinforcement Learning Networks with Health System Simulations
将深度强化学习网络与卫生系统模拟相集成
  • DOI:
    10.20944/preprints202007.0598.v1
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Michael Allen;T. Monks
  • 通讯作者:
    T. Monks
Biphasic effects of intraaccumbens μ-opioid peptide agonist DAMGO on locomotor activities
伏隔内 μ-阿片肽激动剂 DAMGO 对运动活动的双相作用
Hypertension chez les patients âgés: Les seuils systoliques recommandés ne sont pas fondés scientifiquement
高血压患者的建议:收缩收缩建议不科学
  • DOI:
  • 发表时间:
    2013
  • 期刊:
  • 影响因子:
    3.1
  • 作者:
    Michael Allen;Kim Kelly;Isobel Fleming
  • 通讯作者:
    Isobel Fleming
P020. Defining molecular signatures to personalise management of patients with early breast cancer
  • DOI:
    10.1016/j.ejso.2021.03.024
  • 发表时间:
    2021-05-01
  • 期刊:
  • 影响因子:
  • 作者:
    Natalie Allen;Michael Allen;Jenny Gomm;Rachel Nelan;Ai Nagano;Claude Chelala;Louise Jones
  • 通讯作者:
    Louise Jones
Violent behavior of patients admitted in emergency following drug suicidal attempt: a specific staff educational crisis intervention
  • DOI:
    10.1016/j.genhosppsych.2006.10.007
  • 发表时间:
    2007-01-01
  • 期刊:
  • 影响因子:
  • 作者:
    Lionel Cailhol;Michael Allen;Anne-Hélène Moncany;Andrei Cicotti;Salvatore Virgillito;Rémy P. Barbe;Coralie Lazignac;Cristian Damsa
  • 通讯作者:
    Cristian Damsa

Michael Allen的其他文献

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{{ truncateString('Michael Allen', 18)}}的其他基金

Coccolithophore controls on ocean alkalinity (CHALKY)
颗石藻对海洋碱度的控制(CHALKY)
  • 批准号:
    NE/Y004256/1
  • 财政年份:
    2023
  • 资助金额:
    $ 19.35万
  • 项目类别:
    Research Grant
REU Site: Undergraduate Research Experiences in Estuarine Processes
REU 网站:河口过程本科生研究经验
  • 批准号:
    1756244
  • 财政年份:
    2018
  • 资助金额:
    $ 19.35万
  • 项目类别:
    Continuing Grant
RAPID: COLLABORATIVE RESEARCH: ENSO and Tropical Rain Forest Soil Carbon (CH4, CO2) Fluxes
RAPID:合作研究:ENSO 和热带雨林土壤碳(CH4、CO2)通量
  • 批准号:
    1624623
  • 财政年份:
    2016
  • 资助金额:
    $ 19.35万
  • 项目类别:
    Standard Grant
Pilot Algal Lipids Manufacturing in the UK (PALM-UK)
英国海藻脂质试点生产 (PALM-UK)
  • 批准号:
    BB/N010396/1
  • 财政年份:
    2016
  • 资助金额:
    $ 19.35万
  • 项目类别:
    Research Grant
Planning Grant: I/UCRC for Microbial Forensics
规划补助金:I/UCRC 微生物法证学
  • 批准号:
    1540038
  • 财政年份:
    2015
  • 资助金额:
    $ 19.35万
  • 项目类别:
    Standard Grant
Collaborative Research: Quantifying the footprint of a dominant organism: Biogeochemical impacts of leaf cutter ants in a lowland tropical forest ecosystem
合作研究:量化优势生物的足迹:低地热带森林生态系统中切叶蚁的生物地球化学影响
  • 批准号:
    1442537
  • 财政年份:
    2014
  • 资助金额:
    $ 19.35万
  • 项目类别:
    Continuing Grant
STTR Phase I: A novel Occlusion Balloon Microcatheter for Improved Delivery of Embolization Therapy to Tumors of the Liver
STTR 第一阶段:一种新型闭塞球囊微导管,用于改善肝脏肿瘤的栓塞治疗
  • 批准号:
    1417279
  • 财政年份:
    2014
  • 资助金额:
    $ 19.35万
  • 项目类别:
    Standard Grant
SGER: Impact of Hurricane Wilma, a Large "Infrequent" Enrichment Disturbance on Tropical Seasonal Forest: Establishing the Legacy Effect on the Post-disturbance Mosaic
SGER:飓风威尔玛的影响,对热带季节性森林的一次大型“罕见”富集干扰:建立对干扰后马赛克的遗留效应
  • 批准号:
    0615427
  • 财政年份:
    2006
  • 资助金额:
    $ 19.35万
  • 项目类别:
    Standard Grant
Auschwitz's Techno-Scientific Core
奥斯维辛集中营的科技核心
  • 批准号:
    0408827
  • 财政年份:
    2004
  • 资助金额:
    $ 19.35万
  • 项目类别:
    Continuing Grant
Automated-Minirhizotron and Arrayed Rhizosphere-Soil Sensors [A-MARSS]
自动化微型根际管和阵列根际土壤传感器 [A-MARSS]
  • 批准号:
    0410408
  • 财政年份:
    2004
  • 资助金额:
    $ 19.35万
  • 项目类别:
    Continuing Grant

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