If the Mediterranean basin was formed by an eruption, relatively recently
Eh? The last truly cataclysmic event in the Mediterranean basin was about 5 million years ago—a bit too early for sea trade routes. And if you mean the Santorini eruption, it did not kill off the local flora and fauna necessitating introduction events.
Well, no, I didn’t mean that the sea trade was the only source of introductions, just that it might have left still-distinct ‘tracks’ by adding species less likely to be carried in by the initial flood.
Eh? The last truly cataclysmic event in the Mediterranean basin was about 5 million years ago—a bit too early for sea trade routes. And if you mean the Santorini eruption, it did not kill off the local flora and fauna necessitating introduction events.
Well, no, I didn’t mean that the sea trade was the only source of introductions, just that it might have left still-distinct ‘tracks’ by adding species less likely to be carried in by the initial flood.