TABLE 2 Estimated coefficients (Coef) and standard errors (SE) of the negative binomial GLMMs for modelling the responses of relative abundance of EcM fungi to three experimental treatments (OTC warmingversus control, pesticides versus without pesticides, and distance to the parent tree). The model coefficients estimated the treatment effects. The random effects controlled the variation between the two focal tree species and the variation among the three adult trees of each focal species. Their random effect variances were 0.53 and 0.46, respectively.