College of Life Science;
Beijing Normal University;
Beijing 100875;
People’s Republic of China;
Institute of Forestry Science;
Heilongjiang Academy of Forestry;
Harbin 150081;
People’s Republic of China;
Institute of Biology;
University of Leipzig;
Johannisallee 21;
04103 Leipzig;
Germany;
State Key Laboratory of Earth Surface Processes and Resource Ecology;
Beijing 100875;
People’s Republic of China;
Ectomycorrhizal; networks; Spatial; patterns; Nitrogen; transfer; Mongolian; scotch; pine; plantation; Stable; isotope; 15N; labelling;