È stato comunicato oggi, lunedì, l’avvistamento di un esemplare di granchio tropicale, Percnon gibbesi, originario delle coste atlantiche americane, osservato in Mediterraneo per la prima volta nel 1999 a Linosa. L’animale era invece stato visto nei pressi di Genova ad ottobre 2016 e ha poi avuto una diffusione molto rapida con l'aumento della temperatura e dei traffici marittimi.
"Il clima e il mare stanno cambiando, lo dimostrano i continui arrivi di specie a affinità calda e cosiddette aliene provenienti da mari tropicali che stanno sempre più popolando anche il nord del Mediterraneo”, si legge in una nota pubblicata oggi.
"Al momento non si conoscono i potenziali danni all'ambiente che questa presenza può causare "potrebbe entrare in competizione con il granchio autoctono o con gli altri invertebrati erbivori dell'infralitorale superiore (patelle, chitoni, ricci)".
L'avvistamento, avvenuto il 9 luglio scorso, si deve al fotografo subacqueo Michele Solca.
ANSA/APe
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