%0 Journal Article %T Free-living nematodes of Mediterranean ports: A mandatory contribution for their use in ecological quality assessment. %A Franzo A %A Baldrighi E %A Grassi E %A Grego M %A Balsamo M %A Basili M %A Semprucci F %A Franzo A %A Baldrighi E %A Grassi E %A Grego M %A Balsamo M %A Basili M %A Semprucci F %A Franzo A %A Baldrighi E %A Grassi E %A Grego M %A Balsamo M %A Basili M %A Semprucci F %J Mar Pollut Bull %V 180 %N 0 %D Jul 2022 %M 35679809 %F 7.001 %R 10.1016/j.marpolbul.2022.113814 %X Free-living nematodes were investigated in three Mediterranean commercial ports (Ancona and Trieste, Italy; Koper, Slovenia) in terms of abundance, diversity and functionality. Results indicated that r-strategist genera were dominant in all ports and that a more diverse assemblage characterized Trieste, despite the high contamination levels, suggesting a potential adaptation to long-standing contamination. The main environmental factor that shaped the assemblage in all ports were Total Polycyclic Aromatic Hydrocarbons, while Total Organic Carbon and the grain-size were less relevant. A co-occurrence analysis was applied for identifying which genera cohesively respond to site-specific environmental conditions in order to recalibrate and implement the sets of bioindicator genera in relation to their different opportunistic behaviour. Finally, we provided some suggestions for a proper application of the nematode indices (Maturity Index, Index of Trophic Diversity, Shannon diversity) in order to encourage the use of free-living nematodes for the environmental quality assessment of commercial ports.