Symbiotic mycorrhizal types affect patterns of tree aboveground and belowground C allocation in Northeast China  

作　　者：Qinggui Wang Guoyong Yan Xi Luo Guancheng Liu Honglin Wang Yajuan Xing 

机构地区：[1]School of Life Sciences,Qufu Normal University,Qufu 273165,China [2]College of Modern Agriculture and Ecological Environment,Heilongjiang University,Harbin 150080,China

出　　处：《Ecological Processes》2023年第1期379-387,共9页生态过程（英文）

基　　金：supported by grants from the National Natural Science Foundation of China(42230703,41773075,41575137).

摘　　要：Background Given the ubiquitous nature of mycorrhizal symbioses,different symbiotic fungi have obvious differences in structure and function,which may affect associated tree aboveground and belowground C allocation dynamics.However,the mechanisms underlying tree aboveground and belowground C allocation and its response to symbiotic mycorrhizal types and other factors(e.g.,resource availability)remain poorly understood.Results We used forest inventory data to explore the potential mechanism of tree aboveground and belowground C allocation patterns in Northeast China.Our results showed that tree-fungal symbioses were related to the patterns of tree C allocation.The ratio of aboveground to belowground C pool was significantly higher in ectomycorrhizal(EM)-associated trees than that in arbuscular mycorrhizal(AM)-associated trees.Symbiotic mycorrhizal types were associ-ated with the responses of tree aboveground and belowground C allocation to different factors,such as mean annual precipitation(MAP)and mean annual temperature(MAT).Almost all factors significantly increased aboveground C allocation in AM-associated trees but significantly decreased it in EM-associated trees.Moreover,after controlling the other factors,the effects of climate factors(MAT and MAP)on the C allocation of AM-and EM-associated trees were similar.Increases in MAT and MAP significantly increased belowground and aboveground C allocation,respectively.Conclusions Our results demonstrate symbiotic mycorrhizal types play an important role in controlling tree aboveground and belowground C allocation and dynamics.

关 键 词：Symbiotic mycorrhizal type Tree carbon allocation pattern Forest carbon cycling Plant-climate interaction Temperate forest 

分 类 号：Q948[生物学—植物学] X173[环境科学与工程—环境科学]