Figure 3

Spatial variation in fish taxonomic richness. Taxa Area Relationships for eDNA (red line) and UVC (blue line) along their 95% confidence intervals. The dashed black extension of the UVC line estimates how many more taxa could have been detected using UVC if more transects were sampled based on random draws from a pool of 748 transect surveys from 2000 to 2018. Bar plots represent the additive partitioning of regional taxonomic richness among sources of variation for eDNA (\({\gamma }_{eDNA}\)) and UVC (\({\gamma }_{UVC}\)). Significance levels: higher than expected (+), lower than expected (−) and non-significant (NS) component of variation.