Long-term trends in benthic habitat quality as determined by Multivariate AMBI and Infaunal Quality Index in relation to natural variability: A case study in Kinsale Harbour, south coast of Ireland

► M-AMBI and IQI robust to changes in sieve size and taxa identified. ► IQI classified ecological status as higher than M-AMBI. ► Significant relationship between IQI and M-AMBI in spatial calibration, but not in time series. ► IQI and M-AMBI reacted differently to weather parameters.