Fig. 2: Global patterns of marine animal biomass and projected change.
From: Future ocean biomass losses may widen socioeconomic equity gaps
a Average standardized biomass of marine animals from multi-model projections for the contemporary period (2006–2016). Left: Map depicts animal biomass density in each grid cell, relative to the global maximum and normalized. Gray lines depict the 200 m isobath. Right: graph shows the latitudinal variation in present-day animal biomass (black), SST (red), NPP (blue), and diatom frequency (yellow). b, c Maps of projected future change in animal biomass between 2006 and 2100, relative to the reference period (2006–2016) under a worst-case scenario RCP8.5 (b) and strong mitigation scenario RCP2.6 (c). White depicts grid cells containing non-significant trends (p > 0.05) or containing insufficient data for analysis. Circular histograms depict the proportion of grid cells where analyses were possible that contained increasing (blue) or declining (red) changes. Inner opaque shading depicts changes that were statistically significant (p < 0.05), and outer shading depicts those that were both statistically significant and non-significant. Histograms show the distribution of all statistically significant predicted changes per grid cell with global means denoted as red arrows. Projected changes in b, c were estimated using longitudinal models. Data sources are listed in Table 1.
