Greenhouse gas emissions from managed peatlands have not been extensively studied in Western Patagonia. The objective of this study was to assess the annual CO₂ emission from microbial carbon (C) mineralization in a peatland site under not saturated conditions at Tierra del Fuego. The annual CO₂ emissions were measured from unsaturated soil samples (n = 41) under soil incubation at seasonal local temperatures to simulate CO₂ emissions for a year, using a non-dispersive infrared gas analyser. Spatial models for total soil C and CO₂ were calculated using discrete and continuous variables. The annual mean of measured cumulative CO₂ was 1,358 µg CO₂ g soil⁻¹, lower than Northern peatlands, and 82% of the C mineralization occurred in the warmer season. The modelled CO₂ in the warmer season showed levels of CO₂ as high as 4 mg CO₂ g soil⁻¹, but 66% of the area showed between 600–2000 µg CO₂ g soil⁻¹, which is 28%–92% and 9%–32% of CO₂ values reported for crop rotations. Consequently, after a potential habilitation of the study area for agricultural use, the soil CO₂ emissions from heterotrophic activity would become a C source to the global CO₂ emissions. This ecosystem is highly exposed to the effects of the land-use change, and global temperature increase.

中文翻译：

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当地规模的二氧化碳排放与来自巴塔哥尼亚西部（智利火地岛）实验模拟的排水泥炭地的土壤异养活动有关

西巴塔哥尼亚尚未广泛研究管理泥炭地的温室气体排放。本研究的目的是评估火地岛未饱和条件下泥炭地场地中微生物碳 (C) 矿化产生的年度 CO _{2排放量。}使用非色散红外气体分析仪在当地季节性温度下的土壤孵化下测量非饱和土壤样品 ( n  = 41)的年 CO _{2排放量，以模拟一年的 CO 2排放量。}使用离散和连续变量计算土壤总 C 和 CO ₂的空间模型。测量累积 CO ₂的年平均值为 1,358 µg CO ₂ g 土壤^-1，低于北部泥炭地，82% 的 C 矿化发生在温暖的季节。温暖季节的模拟 CO _{2显示 CO 2}水平高达 4 mg CO ₂ g 土壤^-1，但 66% 的区域显示在 600–2000 µg CO ₂ g 土壤^-1之间，即 28%–92 % 和 9%–32% 的 CO ₂值报告用于轮作。因此，在研究区潜在适应农业用途后，异养活动产生的土壤 CO ₂排放将成为全球 CO _2的碳源排放。这个生态系统高度暴露于土地利用变化和全球气温升高的影响。