文献类型：期刊文献

英文题名：Mild Decade-Warming Shifts Soil Organic Carbon Composition Without Altering Total Stock in Temperate and Subtropical Forests

作者：Yang, Yujing[1,2] Wang, Hui[1,3] Liu, Shirong[1] Xue, Jianming[4] Clinton, Peter[4] Liu, Yanchun[5] Chen, Lin[6] Xiong, Jiatai[2] Wang, Jian[1] Jiang, Weijian[6] Ma, Qingqian[6] Ming, Angang[6] Tian, Zuwei[6]

第一作者：Yang, Yujing

通信作者：Wang, H[1];Wang, H[2]

机构：[1]Chinese Acad Forestry, Ecol & Nat Conservat Inst, Key Lab Forest Ecosyst Conservat & Restorat, Natl Forestry & Grassland Adm, Beijing, Peoples R China;[2]Hubei Univ, Fac Resources & Environm Sci, Hubei Key Lab Reg Dev & Environm Response, Wuhan, Peoples R China;[3]Youyiguan Forest Ecosyst Observat & Res Stn Guangx, Guangxi Youyiguan Forest Ecosyst Observat & Res St, Pingxiang, Peoples R China;[4]Scion, Christchurch, New Zealand;[5]Henan Univ, Sch Life Sci, Int Joint Res Lab Global Change Ecol, Kaifeng, Peoples R China;[6]Chinese Acad Forestry, Expt Ctr Trop Forestry, Guangxi Youyiguan Forest Ecosyst Observat & Res St, Youyiguan Forest Ecosyst Observat & Res Stn Guangx, Pingxiang, Peoples R China

年份：2026

卷号：29

期号：2

外文期刊名：ECOLOGY LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001697593300001)】；

基金：This work was supported by the Fundamental Research Funds of Chinese Academy of Forestry, CAFYBB2020ZA001 and National Natural Science Foundation of China, 32471658.

语种：英文

外文关键词：carbon chemical composition; carbon physical fraction; climate change; soil organic carbon; soil warming; temperate and subtropical forests

摘要：Although soil respiration is known to increase with warming, the long-term stability of total forest soil organic carbon (SOC) stocks and their compositional changes remain uncertain. Through a 12-year soil warming experiment (+1.21 degrees C) in temperate and subtropical forests, we found that SOC content remained stable in both 0-10 cm and 10-20 cm layers. A supporting global meta-analysis further indicated that substantial SOC loss in forests occurs only under sustained warming exceeding 2 degrees C. However, after 12 years, warming induced distinct compositional shifts. In the temperate forest, mineral-associated C and the aromatic C/O-alkyl C ratio declined, suggesting weakened mineral protection and lignin decomposition. Conversely, in the subtropical forest, alkyl C and the alkyl C/O-alkyl C ratio increased, indicating accumulation of recalcitrant compounds. These results demonstrate that while mild long-term warming below 2 degrees C can maintain overall SOC stocks, it drives ecosystem-specific compositional transformations that may influence future soil C persistence under continued climate change.