文献类型：期刊文献

英文题名：Soil respiration related to the molecular composition of soil organic matter in subtropical and temperate forests under soil warming

作者：Liu, Yanchun[1,2] Wang, Hui[1,3] Schindlbacher, Andreas[4] Liu, Shirong[1] Yang, Yujing[5] Tian, Huimin[2] Chen, Lin[6] Ming, Angang[6] Wang, Jian[1] Li, Jiachen[7] Tian, Zuwei[6]

第一作者：Liu, Yanchun

通信作者：Wang, H[1]

机构：[1]Chinese Acad Forestry, Ecol & Nat Conservat Inst, Key Lab Forest Ecol & Environm, Natl Forestry & Grassland Adm, 2 Dongxiaofu, Beijing 100091, Peoples R China;[2]Henan Univ, Sch Life Sci, Int Joint Res Lab Global Change Ecol, Kaifeng 475004, Henan, Peoples R China;[3]Guangxi Youyiguan Forest Ecosyst Natl Observat & R, Youyiguan Forest Ecosyst Observat & Res Stn Guangx, Pingxiang 532600, Guangxi, Peoples R China;[4]Nat Hazards & Landscape BFW, Dept Forest Ecol & Soil, Fed Res & Training Ctr Forests, Seckendorff Gudent Weg 8, A-1131 Vienna, Austria;[5]Hubei Univ, Fac Resources & Environm Sci, Hubei Key Lab Reg Dev & Environm Response, Wuhan 430062, Peoples R China;[6]Chinese Acad Forestry, Expt Ctr Trop Forestry, Guangxi Youyiguan Forest Ecosyst Res Stn, Pingxiang 532600, Guangxi, Peoples R China;[7]Beijing Forestry Univ, 35 East Qinghua Rd, Beijing 100083, Peoples R China

年份：2025

卷号：201

外文期刊名：SOIL BIOLOGY & BIOCHEMISTRY

收录：;EI(收录号：20244817437331);Scopus(收录号：2-s2.0-85210104402);WOS:【SCI-EXPANDED(收录号:WOS:001367900500001)】；

基金：This work was financially by the Fundamental Research Funds of Chinese Academy of Forestry (CAFBB2020ZA001) , National Natural Science Foundation of China (32471658) , and National Key R & D Program of China (2023YFE0105100-1).

语种：英文

外文关键词：Soil CO 2 fluxes; SOM chemical composition; Long-term soil warming; Subtropical forest; Temperate forest; Fine root biomass; Microbial r/K strategy

摘要：The chemical composition and degradability of soil organic matter (SOM) are among the most important factors influencing the feedback between soil CO2 emissions and climate warming. We hypothesized that the response of soil respiration to long-term warming in various forest ecosystems depends on how soil warming alters the chemical composition of SOM. Therefore, we compared the effects of long-term soil warming on soil respiration, SOM molecular structure, and bacterial and fungal diversity in two forest ecosystems in the southern subtropical and warm temperate zones of China. In the subtropical forest, soil warming did not affect soil respiration in the short term (2-3 years) but decreased it in the longer term (10 years, -10%). The decline in soil respiration was associated with an increased aliphaticity of SOM and lower O-alkyl C content, along with an increased abundance of microbial K-strategists over time. In the warm temperate forest, soil warming significantly stimulated soil respiration by 35% in the short term and 30% in the long term. The sustained positive response to warming was likely related to the increased decomposability of SOM owing to increased root C input. Our results suggest that the molecular composition of SOM is affected by warming and in turn feeds back to longer-term soil respiration responses. The different responses at the two study sites suggest considerable variation in the feedback within different forest ecosystems.