Community biomass
Community biomass showed higher variation among sites (Figure 2B) with collection-specific medians ranging from 22.3 to 6,729 mg dry mass per m2. The global median of the posterior samples from the hierarchical Bayesian model was 1,333 mg dry mass per m2 (95% CrI (247, 10 929)). Community biomass had a 95% probability of being positively related to mean annual temperature (coefficient estimate = 0.04 (CrI (-0.008, 0.09); Table 2). After exponentiating, this indicates that each unit increase in mean annual temperature causes an average of a 4% increase in biomass. From the posterior predictive distribution, median biomass values ranged from a low of 285 mg dry mass per m2 at site CARI (mean annual temperature = -1°C) to a high of 11,309 mg dry mass per m2 at site LEWI (mean annual temperature = 12°C, Figure 3B).