Fig. 5
Box plots of fish species richness as estimated by four primer pairs at five sampling locations (four estuaries and one coastal water in UK; Collins et al. 2019). The horizontal bar, boxes, and whiskers represent the median value, 25–75th percentiles, and values < 1.5-fold the interquartile range (IQR), respectively, while dots represent the outlying data points and crosses represent the cumulative number of species. COI Cytochrome oxidase I. The original figure was kindly provided by Rupert A. Collins and Stefano Mariani (Collins et al. 2019)