Variation in Soil Bacterial and Fungal Community Composition at Different Successional Stages of a Broad-Leaved Korean Pine Forest in the Lesser Hinggan Mountains

Soil microorganisms are an integral part of the soil and highly sensitive to environmental changes. The shift in plant community properties following forest succession may cause differences bacterial fungal composition. Some studies suggested community, species composition tends switch from r-strategy groups k-strategy groups. However, generalization on changing pattern has not been worked out. Three forests at early-, intermediate-, late-stage (ES, IS, LS) broad-leaved Korean pine Lesser Hinggan Mountains were surveyed study variation as proceeds. microbial related factors analyzed by systematic sampling. Significant detected between different stages. diversity increased, while decreased (p < 0.05) early late successional forest. fungi bacteria ratio (F/B) (Proteobacteria + Bacteroidetes) (Actinobacteria Acidobacteria) increased substantially with 0.05). At phylum level, Bacteroidetes, Ascomycota Mortierellomycota dominant ES forest, Actinobacteria Basidiomycota prevalent LS class Gammaproteobacteria, Acidobacteriia, Bacteroidia, Sordariomycetes Mortierellomycetes whereas Subgroup_6, Agaricomycetes, Geminibasidiomycetes Tremellomycetes water content (SWC) available phosphorus (AP) had significant effects organic carbon (SOC), total nitrogen (TN), carbon–nitrogen (C/N), potassium (TK) SWC SOC TN positively correlated significantly negatively Our results suggest that changed across stages, switched differed changes resulted shifting ecological strategies.