Wang Di, Zang Shuying, Wu Xiangwen, Ma Dalong, Li Miao, Chen Qiang, Liu Xinrui, Zhang Nannan
School of Geographical Sciences, Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin 150025, China.
Saudi J Biol Sci. 2021 Dec;28(12):7037-7045. doi: 10.1016/j.sjbs.2021.07.088. Epub 2021 Aug 8.
In permafrost peatlands, the degradation of permafrost soil can raise soil temperature and alter moisture conditions, which increases the rate of loss of soil organic carbon (SOC). Here we selected three typical permafrost types that have very different active layer thicknesses but with soil originating from the same vegetation and which exist under comparable climatic conditions in the Da Xing'an mountain range: continuous permafrost, island permafrost, and island melting permafrost. To quantify the relative importance of control elements on SOC stabilization in these different permafrost types, we used correlation analysis to assess the relationship between organic carbon, physical and chemical properties and microorganisms, and explored the contribution of these factors to the accumulation of organic carbon. This study shows that the interaction between clay or silt, iron oxides and microorganisms have an important influence on the stability of organic carbon in permafrost peatlands.
在多年冻土泥炭地中，多年冻土的退化会提高土壤温度并改变水分条件，从而增加土壤有机碳（SOC）的流失速率。在此，我们选择了三种典型的多年冻土类型，它们的活动层厚度差异很大，但土壤源自相同植被，且存在于大兴安岭类似的气候条件下：连续多年冻土、岛状多年冻土和岛状融化多年冻土。为了量化这些不同多年冻土类型中控制因素对SOC稳定的相对重要性，我们使用相关分析来评估有机碳、物理化学性质与微生物之间的关系，并探讨这些因素对有机碳积累的贡献。本研究表明，粘土或粉砂、氧化铁与微生物之间的相互作用对多年冻土泥炭地中有机碳的稳定性具有重要影响。
