Range of environmental values covered by each dataset.

Average value and range (i.e. [minimum: maximum]) of the 23 environmental descriptors computed on: (1) the entire T-NET network (N = 52,278 reaches), (2) reaches with fish data (N = 1,191), (3) reaches with macroinvertebrate data (N = 1,195), and (4) reaches with fish and macroinvertebrate data (“common” dataset; N = 532). Ta and Tw refer to air and water temperature, respectively. Suffixes m, sd, 10 and 90 refer to the mean, standard deviation, lower 10% quantile and upper 90% quantile, respectively.