Figure 2: Relationship between the response of species richness and biomass in controls and NPK treatments across time. In A) and B), the thick lines represent the overall effect estimate for NPK (solid) and Control plots (dashed), and the grey shading around these lines shows the 95% credible interval. Each jittered grey point represents a plot treated with NPK. Each grey thin line represents the slope of every experimental site treated with NPK as a random effect. The inset plots represent the overall effect estimate (slope) of Control and NPK treatments, error bars represent 95% credible intervals, and the dashed line at 0 represents a reference slope of 0 for each metric.
In C), the large colored point and error bars represent the overall effect estimate of NPK on species richness and biomass as a rate of change (/year) across studies. Each grey point represents the slope of an experimental site (n=59) treated with NPK, and error bars represent the 95% credible intervals for each site. The dashed reference line at 0 represents a slope of 0 for each metric.