Journal of Plant Ecology ›› 2026, Vol. 19 ›› Issue (2): 1-0.DOI: 10.1093/jpe/rtaf146
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Mengjie Liu1,2, Quan-Cheng Wang1,3, Yang Li4, Ronglei Zhou1,2,3, Junxiao Pan1, Dashuan Tian1,2,3, Ruiyang Zhang1,2,3, Houkun Chu1,3, Ning Liu1,2,3, Hui Wang5, Huichen Zhang1, Jingjing Shi1, Ruifa Wang6, Lei Ma7, Shuli Niu1,2,3, Jinsong Wang1,2,3*
1Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China, 2Departments of Ecology and Environment, University of the Chinese Academy of Sciences, Beijing 100101, China, 3Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Chengdu 610041, China, 4Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China, 5Southwest Minzu University Chengdu 610041, China, "School of Lie Science and Engincering, Southwest University of Science and Technology, Mianyang 621010, China, Lanzhou University, Lanzhou 730000, China
*Corresponding author. Email: wangjinsong@igsnrr.ac.cn
摘要： 泥炭地储存了全球约1/3的土壤有机碳(SOC)，揭示泥炭地SOC来源对于评估该富碳生态系统碳的形成与稳定性至关重要。然而，目前关于泥炭地植物和微生物来源碳的大尺度格局及驱动因素，仍缺乏系统研究。本研究通过测定植物与微生物残体的生物标志物(即木质素酚和氨基糖)，解析了若尔盖高寒泥炭地表层泥炭(0–20 cm)中植物和微生物来源碳的空间分布及驱动因子。结果表明，随着SOC的积累，氨基糖的贡献逐渐降低，而木质素酚的贡献保持稳定，表明植物来源碳在高寒泥炭地SOC积累中起主导作用。进一步分析发现，土壤养分和微生物属性是木质素酚空间变异的主要影响因素，而土壤养分和矿物保护作用对氨基糖的影响高于微生物属性和气候因子。具体而言，木质素酚与土壤养分、真菌丰富度及酸性磷酸酶活性负相关，而与亮氨酸氨基肽酶活性正相关；氨基糖与土壤全磷含量正相关，而与铁结合态碳及铁/铝氧化物负相关。综上所述，本研究提供了高寒泥炭地植物和微生物来源碳的大尺度观测证据，加深了学术界对于该富碳且气候敏感生态系统土壤碳形成与稳定机制的理解。
