The effect of climate change on peatlands is of great importance due to their large carbon stocks. In this study, we examined microbial biomass and effect of temperature and O₂ availability on soil respiration of surface and subsurface Sphagnum peat. The interactive effect of biotic and abiotic factors significantly affects soil respiration. Increasing temperature enhanced the microbial respiratory activity and thus the soil respiration, while there is a temperature threshold. The more decomposed subsurface peat showed a lower CO₂ production due to less labile carbon and lower microbial biomass, but a higher temperature sensitivity. Q₁₀ of aerobic respiration increased from 1.93 ± 0.26 in surface to 2.20 ± 0.01 in subsurface peat. The linear relationship between Q₁₀ and depth in the uppermost 50 cm peat section can be used to improve the estimation of CO₂ production in peat profiles.

气候变化对泥炭地的影响非常重要，因为它们的碳储量很大。在这项研究中，我们研究了微生物生物量以及温度和O ₂有效性对表层和表层泥炭泥炭土壤呼吸的影响。生物和非生物因素的相互作用会显着影响土壤呼吸。温度升高会提高微生物的呼吸活性，从而增强土壤呼吸，但存在温度阈值。分解得更深的地下泥炭显示出较低的CO ₂产生量，这是由于较低的活性碳和较低的微生物生物量，但具有较高的温度敏感性。问₁₀有氧呼吸的速度从表层泥炭的1.93±0.26增加到表层泥炭的2.20±0.01。Q ₁₀和最上部的50 cm泥炭剖面深度之间的线性关系可用于改善泥炭剖面中CO ₂产量的估算。