Epiphytic bryophytes as bio-indicators of atmospheric nitrogen deposition in a subtropical montane cloud forest: Response patterns, mechanism, and critical load

The structural equation model of N addition effects on the loss of epiphytic bryophytes in the subtropical montane cloud forest (χ2 = 13.62, d. f. = 10, Probability level = 0.19, AIC = 47.62). Mean values from species level and community variables after 2 years' treatment were used to determine the pathway. Numbers adjacent to arrows are standardized path coefficients (equivalent to correlation coefficients), indicating the effect size of the relationship. Arrow width is proportional to the strength of the relationship. The proportion of variance explained is given as r2.106