Figure 2
From: Presence-absence of marine macrozoobenthos does not generally predict abundance and biomass
Regional intraspecific temporal relationships for a selection of four bivalve species (rows). Abundance-occupancy relationships are shown in the left column, and biomass-occupancy relationships in the right column. Each data point represents a yearly measurement of either a species’ abundance (m−2) or biomass (g m−2), and occupancy (fraction of sampling stations occupied) in the entire Dutch Wadden Sea. The log10 of abundance or biomass was modelled as a function of the logit of occupancy (solid line). To assess the strength of relationships, each panel shows the coefficient of determination (R2, proportion) and back-transformed Root Mean Squared Error (RMSEbt, %). Non-significance of linear models is indicated by dashed lines. Points are labelled with the last two digits of the sampling years.
