Do nematode and macrofauna assemblages provide similar ecological assessment information?

► Do nematode and macrofauna provide similar ecological assessment information? ► Changes in density and composition of both estuarine assemblages were observed. ► The performance of the ecological indices (MI, ITD and BAT) was different. ► The ecological assessment information varied between stretches and “target” community. ► Optimally, both groups should be complementary used in monitoring programs.