EAGER SitS:Collaborative Research:Projecting Arctic soil and ecosystem responses to warming using SCAMPS: A stoichiometrically coupled, acclimating microbe-plant-soil model

EAGER SitS：合作研究：使用 SCAMPS 预测北极土壤和生态系统对变暖的反应：化学计量耦合的适应微生物-植物-土壤模型

基本信息

批准号：
2051801
负责人：
Seeta Sistla
金额：
$ 9.64万
依托单位：
California Polytechnic State University Foundation
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-09-01 至 2021-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2051801&HistoricalAwards=false
关键词：
EAGER SitS Collaborative Research Projecting

项目摘要

Understanding future arctic terrestrial carbon balance is vital because high latitude soils contain about twice as much carbon as is in the atmosphere and its release would drive a major acceleration of atmospheric carbon dioxide accumulation. This research will advance the understanding of processes regulating the storage and release of carbon from arctic soils across biological and physical scales using a modeling approach. The study will promote both basic research into the controls on arctic soil and ecosystem processes and be applicable to management agencies by describing how linked biotic-abiotic responses to unprecedented warming may influence future carbon balance in Arctic terrestrial ecosystems. Further, this grant will help advance the career of an Assistant Professor at a primarily undergraduate institution, while enhancing gender and racial diversity in the biogeosciences. This research will also directly enhance undergraduate education in arctic biogeoscience through directed mentorship of undergraduate researchers; the research approach and findings will also be incorporated into courses and other teaching activities by the primary investigators.Field studies suggest that inconsistent responses to comparable experimental manipulations across arctic tundra ecosystems might be driven by local variation in the plant and decomposer community. However, the relative importance of, and links between, key biotic (e.g. microbial acclimation) and abiotic factors (e.g. altered snowpack, thaw depth, and nutrient availability) that govern these divergent responses of tundra to climate variation, remains unknown. This project will synthesize available data from ambient and experimental manipulations of arctic ecosystems. The investigators will then use the synthesis to refine, parameterize, and validate a changed version of the Stoichiometrically Coupled, Acclimating Microbe-Plant-Soil (SCAMPS) model. Simulations will explore how variation in seasonal warming and the acclimation potential of the soil microbial and plant community, encompassing community shifts, evolutionary adaptation, and physiological changes across tundra landscapes, affects biogeochemical feedbacks and regulates future carbon balance of arctic soils and ecosystems.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

了解未来的北极陆碳平衡至关重要，因为高纬度土壤的含量是大气中的两倍，其释放将驱动大气二氧化碳积累的主要加速。这项研究将通过建模方法提高对调节北极土壤中碳储存碳的存储和释放的过程的理解。该研究将通过描述如何与前所未有的变暖联系起来，既将基础研究促进对北极土壤和生态系统过程的控制，并适用于管理机构，这可能会影响北极陆地生态系统中未来的碳平衡。此外，这笔赠款将有助于促进主要是本科机构的助理教授的职业，同时增强了生物学家中的性别和种族多样性。这项研究还将通过本科研究人员的指导指导直接增强北极生物科学的本科教育；研究方法和发现还将由主要研究人员纳入课程和其他教学活动中。领域的研究表明，北极苔原生态系统中对可比实验操作的反应不一致，可能是由工厂和分解群社区的局部变化驱动的。然而，关键生物（例如微生物适应）和非生物因素（例如，积雪，解冻深度和营养可用性改变）的相对重要性，这些因素的相对重要性，这些因素（例如改变了苔原对气候变化的不同反应，尚不清楚）。该项目将从北极生态系统的环境和实验操作中综合可用数据。然后，研究人员将使用合成来完善，参数化和验证更改的石化耦合，以适应微生物 - 植物 - 土壤（SCAMP）模型。模拟将探讨土壤微生物和植物社区的季节变暖和适应潜力的变化，包括社区的转变，进化适应性以及在苔原景观之间的生理变化，会影响生物地球化学反馈，并利用北极土壤和生态系统的未来碳平衡来影响生物地球化学反馈，并调节了未来的批准。基金会的智力优点和更广泛的影响评论标准。