Beyond seedlings: ectomycorrhizal fungal networks and growth of mature Pseudotsuga menziesii

Greater growth was positively associated with 1) the number of connections to other trees via a Rhizopogon vinicolor EMN, and 2) the number of genets of Rhizopogon vesiculosis by which a tree was colonized. Variation of growth (2000–2016) was negatively associated with increasing number of connections to other trees via Rhizopogon vinicolor. Synthesis.

These findings, for the first time, indicate that EMNs may positively influence the growth of adult trees. The difference in tree growth response between the sister fungal species highlights a novel avenue to identify interspecific and intraspecific differences between species occurring at different depths in the soil. Our study has important implications when considering the role of EMNs in influencing forest health and mitigating stress from environmental conditions.

Usage notes

Data is split for the 10 x 10 plots used for the analysis and sampled trees that were excluded from the analysis. A duplicate README file is included within the Excel datasheet.