Wetland soil carbon storage in the Prairie Pothole region of Saskatchewan

萨斯喀彻温省草原坑洼地区湿地土壤碳储存

• 批准号: 566551-2021
• 负责人: BedardHaughn, Angela
• 金额: $ 3.16万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=720993
• 关键词: Wetland; soil; carbon; storage; Prairie

The co-existence of crop production and wetlands is an on-going challenge in agricultural landscapes, especially with the increasing understanding of the important role of wetlands for carbon storage. The Prairie Pothole Region (PPR) has important and distinct types of wetlands due to its geology and topography, known as prairie potholes. Currently at least 70% of prairie potholes in Canada have been drained, which is of significance to soil organic carbon (SOC) stocks in the Canadian Prairies as prairie potholes can store as much as twice the SOC in no-till croplands. Given their potential as carbon sinks, prairie pothole wetlands can have an important contribution to Canada's action on nature-based solutions for climate change. Currently, estimates of wetland SOC storage for the PPR are often generalized across climate regimes as well as wetland types with varying amounts of surface water storage and temporal drainage dynamics. The goal of this research will be to improve tools for estimating soil carbon stocks in the Canadian PPR. The creation of region-specific stock values is necessary to improve the accuracy of wetland SOC stock estimates. Specifically, we aim to refine the stock estimates to better account for the interactions amongst wetland classes (ephemeral, temporary, and seasonal), climate gradients and naturally occurring salinity.

作物生产与湿地的共存是农业景观中持续存在的挑战，特别是随着人们对湿地在碳储存方面的重要作用的日益了解。草原坑洼地区 (PPR) 由于其地质和地形而拥有重要且独特的湿地类型，称为草原坑洼。目前，加拿大至少 70% 的草原坑洼已被排干，这对加拿大大草原的土壤有机碳 (SOC) 储量具有重要意义，因为草原坑洼可储存的 SOC 是免耕农田的两倍。鉴于其作为碳汇的潜力，草原坑洼湿地可以为加拿大采取基于自然的气候变化解决方案的行动做出重要贡献。目前，对 PPR 湿地 SOC 储存量的估计通常适用于各种气候状况以及具有不同地表水储存量和时间排水动态的湿地类型。这项研究的目标是改进估算加拿大 PPR 土壤碳储量的工具。创建特定区域的库值对于提高湿地 SOC 库估算的准确性是必要的。具体来说，我们的目标是完善库估计，以更好地解释湿地类别（短暂的、暂时的和季节性的）、气候梯度和自然发生的盐度之间的相互作用。