Dataset for Examining the Effects of Nutrient Pulses on Biogeochemical Cycling in Subarctic Peatlands in the Context of Permafrost Thaw and Wildfires

This dataset contains results from a laboratory soil incubation experiment for subarctic bog and fen shallow peat cores. The main goal of this one-month experiment was to examine the immediate biogeochemical responses of subarctic peat samples to sudden nutrient additions, nitrogen (N) and phosphorus (P) in dissolved bioavailable forms (i.e., ammonium, nitrate, and phosphate). The main data product was the set of greenhouse gas flux rates from the control and nutrient-added peat samples, including the measurements of carbon dioxide (CO2), methane (CH4), and nitrogen oxide (N2O), although the N2O results were not discussed in the associated manuscript "Examining the Effects of Nutrient Pulses on Biogeochemical Cycling in Subarctic Peatlands in the Context of Permafrost Thaw and Wildfires" (in submission, 2023) as the discussion focused on microbial carbon (C) cycling responses. Other analysis results relevant to the interpretation of C gas emission rates were included, such as porewater chemistry (i.e., concentrations of major cations and anions), peat organic matter composition (i.e., total C, N and P concentrations), and chloroform fumigation analysis (i.e., microbial biomass extraction and measurements of C, N and P concentrations).

本数据集收录了亚北极泥炭沼泽（bog）与富营养泥炭沼（fen）浅层泥炭岩心的实验室土壤培养实验结果。本次为期一个月的实验核心目标为探究亚北极泥炭样品对突发性养分输入的即时生物地球化学响应，所添加的养分为溶解态生物可利用形式的氮（N）与磷（P），具体包括铵态氮、硝态氮及磷酸盐。本数据集的核心数据产物为对照组与养分添加组泥炭样品的温室气体通量速率数据集，涵盖二氧化碳（CO₂）、甲烷（CH₄）及一氧化二氮（N₂O）的测定结果；不过相关手稿《Examining the Effects of Nutrient Pulses on Biogeochemical Cycling in Subarctic Peatlands in the Context of Permafrost Thaw and Wildfires》（2023年待刊）中并未讨论一氧化二氮的实验结果，因该手稿的讨论部分聚焦于微生物碳（C）循环响应。此外，数据集还收录了有助于阐释碳基气体排放速率的其他分析结果，包括孔隙水化学特性（即主要阳离子与阴离子浓度）、泥炭有机质组成（即总碳、总氮与总磷浓度），以及氯仿熏蒸分析结果（即微生物生物量提取与碳、氮、磷浓度测定）。