Figure 1: Schematic illustration of compositional change and the contribution to altered functioning based on the ecological version of the Price equation as suggested by Fox and Kerr (2012). A) Represents a Nutrient Network plot at year 0 (t=0) on the left before nutrient addition, and on the right represents the same plot at a point in time after NPK addition (Year tn). Species losses, species gains, and change in persistent species are additive components of this composition-functioning relationship and each component affects measures of species richness and community biomass change. B) Observed changes in species abundances and changes in biomass within a community can be plotted. This figure represents our expectations for the overall effect of NPK addition on change in species and biomass as a rate over time, and our expectations for partitioning this effect into biomass lost associated with species loss, biomass gained associated with species gain and the biomass change associated with persistent species. Plant images by Alex Muravev, The Noun Project.