The Bugs of Winter: Microbial Control of Soil Biogeochemistry During the Arctic Cold Season
冬季的虫子:北极寒冷季节土壤生物地球化学的微生物控制
基本信息
- 批准号:0352863
- 负责人:
- 金额:$ 50.58万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2004
- 资助国家:美国
- 起止时间:2004-03-15 至 2007-02-28
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The real Arctic year is dominated by the 9 month long "cold season", which includes the period when the active layer is at its maximum depth and an extended period while soils are freezing and held at 0 degrees C. Cold-season CO2 fluxes are a substantial component of the annual carbon budget and cold-season nitrogen mineralization appears to dominate annual nitrogen mineralization. There are major shifts in microbial processes that occur between the growing and cold seasons, and they appear to occur above 0 degrees C. Cold-season processes are different from growing season processes. However, we don't understand cold season soil processes sufficiently to incorporate them into models of Arctic ecosystem functioning. Funds have been provided to analyze changing substrate use patterns in soils under Arctic cold season conditions. Specifically, the PI proposes: 1. to evaluate the size of the "winter-labile" substrate pool in each major soil layer, 2. to evaluate specific substrates that are used under thawed and cold conditions, and3. to evaluate the relative importance of the different processes regulating substrate use. These likely include physics (temperature profiles), physical chemistry (recalcitrance-temperature responsiveness relationships), biophysics (microbial interactions with unfrozen water films), biochemistry (shifts in extracellular enzyme activities with temperature), and biology (changing microbial communities and physiological capacities). This research will include field measurements of CO2 flux from different soil horizons (organic, mineral) coupled to laboratory analysis of pools and controlling factors. Long-term lab bioassays will be used to evaluate the size of the "winter-labile" pool, 13C tracer studies to evaluate the processing of specific substrates (monomers and polymers) and how they change with temperature, enzyme potential assays to evaluate changing enzyme kinetics with temperature, NMR to measure unfrozen water curves and electron microscopy to evaluate how microbes (bacteria and fungi) interact with water films, 13C phospholipid fatty acid analyses to evaluate carbon flow into different components of the microbial community, and DNA and RNA fingerprinting to evaluate whether and how microbial communities change between the growing and cold seasons.
真实的北极年以长达9个月的“寒冷季节”为主,其中包括活动层达到最大深度的时期以及土壤冻结并保持在0摄氏度的延长时期。 冷季CO2通量是年度碳收支的重要组成部分,冷季氮矿化似乎主导年度氮矿化。 在生长季节和寒冷季节之间发生的微生物过程有重大转变,它们似乎发生在0 ℃以上。 冷季过程不同于生长季过程。 然而,我们对冷季土壤过程的了解还不足以将其纳入北极生态系统功能模型。 已提供资金分析北极寒冷季节条件下土壤中基质使用模式的变化。 具体而言,PI建议:1。评价各主要土层中“冬不稳定”基质库的大小,2.评估在解冻和低温条件下使用的特定底物,和3.评估不同工艺调节底物使用的相对重要性。 这些可能包括物理学(温度曲线),物理化学(柠檬酸-温度响应关系),生物物理学(微生物与未冻结水膜的相互作用),生物化学(细胞外酶活性随温度的变化)和生物学(改变微生物群落和生理能力)。这项研究将包括从不同的土壤层(有机,矿物)耦合到池和控制因素的实验室分析CO2通量的实地测量。 长期实验室生物测定将用于评估“冬季不稳定”池的大小,13 C示踪剂研究将用于评估特定底物的处理(单体和聚合物)以及它们如何随温度变化,酶势测定以评估随温度变化的酶动力学,NMR以测量未冻结水曲线,电子显微镜以评估微生物如何(细菌和真菌)与水膜的相互作用,13 C磷脂脂肪酸分析以评估进入微生物群落不同组分的碳流,以及DNA和RNA指纹分析以评估微生物群落在生长季节和寒冷季节之间是否以及如何变化。
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 }}
Joshua Schimel其他文献
Representation of diffusion controlled carbon stabilization in reactive transport models
反应输运模型中扩散控制碳稳定的表示
- DOI:
- 发表时间:
2016 - 期刊:
- 影响因子:0
- 作者:
Aaron Thompson;Jennifer L Druhan;Marco Keiluweit;Rota Wagai;Alain F Plante;Corey R Lawrence;Asmeret Asefaw Berhe;Carlos A Sierra;Craig Rasmussen;Erika Marin-Spiotta;Joseph C Blankinship;Joshua Schimel;Katherine A Heckman;Susan E Crow;William - 通讯作者:
William
Organo-mineral associations at different hierarchical levels of soil aggregates: what do we get after physical fractionation?
土壤团聚体不同层次的有机矿物关联:物理分馏后我们得到什么?
- DOI:
- 发表时间:
2015 - 期刊:
- 影响因子:0
- 作者:
Aaron Thompson;Jennifer L Druhan;Marco Keiluweit;Rota Wagai;Alain F Plante;Corey R Lawrence;Asmeret Asefaw Berhe;Carlos A Sierra;Craig Rasmussen;Erika Marin-Spiotta;Joseph C Blankinship;Joshua Schimel;Katherine A Heckman;Susan E Crow;William;Rota Wagai - 通讯作者:
Rota Wagai
New Section: Synthesis and Emerging Ideas
- DOI:
10.1007/s10533-004-3485-4 - 发表时间:
2005-08-01 - 期刊:
- 影响因子:3.700
- 作者:
Joshua Schimel - 通讯作者:
Joshua Schimel
Microbes and global carbon
微生物与全球碳
- DOI:
10.1038/nclimate2015 - 发表时间:
2013-09-25 - 期刊:
- 影响因子:27.100
- 作者:
Joshua Schimel - 通讯作者:
Joshua Schimel
The Soil Carbon Paradigm Shift: Triangulating Theories, Measurements, and Models
土壤碳范式转变:三角测量理论、测量和模型
- DOI:
- 发表时间:
2016 - 期刊:
- 影响因子:0
- 作者:
Joseph C Blankinship;Susan E Crow;Joshua Schimel;Carlos A Sierra;Christina Schaedel;Alain F Plante;Aaron Thompson;Asmeret Asefaw Berhe;Jennifer L Druhan;Katherine A Heckman;Marco Keiluweit;Corey R Lawrence;Erika Marin-Spiotta;Craig Rasmussen, - 通讯作者:
Craig Rasmussen,
Joshua Schimel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('Joshua Schimel', 18)}}的其他基金
Does E. Vaginatum Take up Organic N?
E. Vaginatum 会吸收有机氮吗?
- 批准号:
1417758 - 财政年份:2014
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant
Collaborative Research: Controls over C sequestration: physiology vs. physics
合作研究:碳封存的控制:生理学与物理学
- 批准号:
1145875 - 财政年份:2012
- 资助金额:
$ 50.58万 - 项目类别:
Continuing Grant
DISSERTATION RESEARCH: Exploring the Impacts of Long-Term Warming on Arctic Soils: Linking Microbial Communities with Seasonal Biogeochemical Dynamics.
论文研究:探索长期变暖对北极土壤的影响:将微生物群落与季节性生物地球化学动态联系起来。
- 批准号:
1110843 - 财政年份:2011
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant
Collaborative Research: Environmental changes alter the carbon cycle of high Arctic ecosystems: Shifts in the ages and sources of CO2 and DOC.
合作研究:环境变化改变了北极高海拔生态系统的碳循环:二氧化碳和DOC的年龄和来源的变化。
- 批准号:
0909510 - 财政年份:2009
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant
Collaborative Research: MSB: Microbial control of litter decay at the cellulose-lignin interface
合作研究:MSB:纤维素-木质素界面凋落物腐烂的微生物控制
- 批准号:
0919049 - 财政年份:2009
- 资助金额:
$ 50.58万 - 项目类别:
Continuing Grant
Collaborative Research:The Changing Seasonality of Tundra Nutrient Cycling: Implications for Ecosystem and Arctic System Functioning
合作研究:苔原养分循环的季节性变化:对生态系统和北极系统功能的影响
- 批准号:
0902038 - 财政年份:2009
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant
COLLABORATIVE RESEARCH: Spatial and Temporal Influences of thermokarst features on Surface Processes in Arctic Landscapes
合作研究:热喀斯特特征对北极景观地表过程的时空影响
- 批准号:
0806451 - 财政年份:2008
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant
IPY: Microbial winter survival physiology: a driver on microbial community composition and carbon cycling
IPY:微生物冬季生存生理学:微生物群落组成和碳循环的驱动因素
- 批准号:
0733074 - 财政年份:2007
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant
Dry Season Biogeochemistry of California Ecosystems
加州生态系统的旱季生物地球化学
- 批准号:
0640666 - 财政年份:2007
- 资助金额:
$ 50.58万 - 项目类别:
Continuing Grant
Sedgwick Reserve Infrastructure Development
塞奇威克保护区基础设施开发
- 批准号:
0330442 - 财政年份:2003
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant
相似海外基金
Collaborative Research: Conference: MateriAlZ Winter School 2024
合作研究:会议:MateriAlZ 冬季学校 2024
- 批准号:
2402925 - 财政年份:2024
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant
Collaborative Research: Conference: MateriAlZ Winter School 2024
合作研究:会议:MateriAlZ 冬季学校 2024
- 批准号:
2402926 - 财政年份:2024
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant
Collaborative Research: CEDAR--Higher-Order Concentric Gravity Waves in the Northern Winter Thermosphere and Ionosphere
合作研究:CEDAR——北方冬季热层和电离层的高阶同心重力波
- 批准号:
2407263 - 财政年份:2023
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant
Conference: Aspen Winter Conference: Disorder and Quantum Phases of Matter
会议:阿斯彭冬季会议:物质的无序和量子相
- 批准号:
2409357 - 财政年份:2023
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant
Shade tolerance in conifer species influences susceptibility to winter drought via photosynthetic responses
针叶树物种的耐荫性通过光合作用影响对冬季干旱的敏感性
- 批准号:
23H02262 - 财政年份:2023
- 资助金额:
$ 50.58万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
NSF Postdoctoral Fellowship in Biology: How Overwintering Life-Stage Affects Vulnerability to Winter Warming in Butterflies
美国国家科学基金会生物学博士后奖学金:越冬生命阶段如何影响蝴蝶对冬季变暖的脆弱性
- 批准号:
2208982 - 财政年份:2023
- 资助金额:
$ 50.58万 - 项目类别:
Fellowship Award
Collaborative Research: Costs and Trade-offs of Phenotypically Flexible Responses to Winter Temperature Variability in Birds
合作研究:鸟类对冬季温度变化的表型灵活反应的成本和权衡
- 批准号:
2224556 - 财政年份:2023
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant
Fundamentals of Quantum Materials Winter School and Workshop
量子材料基础冬季学校和研讨会
- 批准号:
2310428 - 财政年份:2023
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant
RAPID: Forecasting & Communicating the US Fall/Winter Respiratory Disease Outlook
快速:预测
- 批准号:
2348262 - 财政年份:2023
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant
Travel: Group Travel Grant for the PhD Forum in the IEEE/CVF Winter Conference on Applications of Computer Vision (WACV 2024)
旅行:IEEE/CVF 计算机视觉应用冬季会议 (WACV 2024) 博士论坛团体旅行补助金
- 批准号:
2335724 - 财政年份:2023
- 资助金额:
$ 50.58万 - 项目类别:
Standard Grant