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

了解未来北极陆地碳平衡至关重要，因为高纬度土壤中的碳含量约为大气中的两倍，其释放将大大加速大气中二氧化碳的积累。这项研究将促进对北极土壤碳储存和释放过程的理解，这些过程使用建模方法在生物和物理尺度上进行调节。这项研究将促进对北极土壤和生态系统过程控制的基础研究，并通过描述对前所未有的变暖的生物-非生物反应如何影响北极陆地生态系统未来的碳平衡，适用于管理机构。此外，这笔赠款将有助于推进助理教授的职业生涯在一个主要的本科院校，同时提高性别和种族多样性的生物科学。这项研究也将直接提高本科教育在北极生态科学通过本科研究人员的指导导师，研究方法和研究结果也将纳入课程和其他教学活动的主要investigator.Field研究表明，不一致的反应，可比较的实验操作整个北极苔原生态系统可能是由当地的变化，在植物和分解者社区。然而，相对的重要性，以及关键的生物（如微生物驯化）和非生物因素（如改变积雪，融化深度，和养分的可用性）之间的联系，这些不同的反应苔原气候变化，仍然未知。该项目将综合从北极生态系统的环境和实验操作中获得的现有数据。然后，研究人员将使用合成来完善，参数化和验证化学计量耦合，适应微生物-植物-土壤（SCAMPS）模型的更改版本。模拟将探索季节性变暖的变化以及土壤微生物和植物群落的适应潜力，包括苔原景观的群落变化，进化适应和生理变化，该奖项反映了NSF的法定使命，并通过使用基金会的知识产权进行评估，被认为值得支持。优点和更广泛的影响审查标准。

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.