Large-scale spatio-temporal monitoring highlights hotspots of demersal fish diversity in the Mediterranean Sea
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AuthorsGranger, V. (Victoria); Fromentin, J.M. (Jean Marc); Bez, N. (Nicolas); Rellini, G. (Giulio); Meynard, C.N. (Christine N.); Gaertner, J.C. (Jean Claude); Maiorano, P. (Porzia); García-Ruiz, C. (Cristina); Follesa, C. (Cristina); Gristina, M. (Michele); Peristeraki, P. (Panagiota); Brind’Amour, A. (Anik); Carbonara, P. (Pierluigi); Charilaou, C. (Charis); Esteban-Acón, A. (Antonio); Jadaud, A. (Angélique); Joksimovic, A. (Aleksandar); Kallianiotis, A. (Argyris); Kolitari, J. (Jerina); Manfredi, C. (Chiara); Massutí, E. (Enric); Mifsud, R. (Roberta); Quetglas, A. (Antoni); Refes, W. (Wahid); Sbrana, M. (Mario); Vrgoc, N. (Nedo); Spedicato, M.T. (Maria Teresa); Mérigot, B. (Bastien)
Increasing human pressures and global environmental change may severely affect the diversity of species assemblages and associated ecosystem services. Despite the recent interest in phylogenetic and functional diversity, our knowledge on large spatio-temporal patterns of demersal fish diversity sampled by trawling remains still incomplete, notably in the Mediterranean Sea, one of the most threatened marine regions of the world. We investigated large spatio-temporal diversity patterns by analysing a dataset of 19,886 hauls from 10 to 800 m depth performed annually during the last two decades by standardised scientific bottom trawl field surveys across the Mediterranean Sea, within the MEDITS program. A multicomponent (eight diversity indices) and multi-scale (local assemblages, biogeographic regions to basins) approach indicates that only the two most traditional components (species richness and evenness) were sufficient to reflect patterns in taxonomic, phylogenetic or functional ...
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