Rarefied richness, both shredder and non-shredder, did not vary with increasing elevation. Dots are rarefied richness for non-shredder and shredder of 15 reaches in an elevational gradient from 156 to 2720 m asl in northern Central America. Black solid lines are the mean fit Bayesian linear model between variables with a Poisson distribution. Blue faded lines are a 1000 possible lines from the Bayesian posterior distribution of the fitted model. Third panel shows a density plot of estimated values for slopes, dashed red line indicates the zero value.