a Longitudinal zonal associations and b trophic structure of mayfly assemblages at the 46 degraded lowland streams and rivers investigated in Croatia. Study site codes are presented in Fig. 1.

 
 
  Part of: Vilenica M, Kerovec M, Pozojević I, Mihaljević Z (2020) Mayfly response to different stress types in small and mid-sized lowland rivers. ZooKeys 980: 57-77. https://doi.org/10.3897/zookeys.980.54805