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Un quarto della flora mondiale è lontano dalla terra d'origine e molte piante ornamentali esotiche potrebbero espandersi rapidamente con l'aumento delle temperature.
Il Ticino, che gode di un clima mite, è particolarmente toccato dal fenomeno, come rileva lo studio ora pubblicato dal periodico Nature.
Nel cantone sudalpino alcune specie di vegetali alloctoni, come ad esempio la palma cinese che minaccia soprattutto i faggeti, stanno invadendo praterie e boschi. Più in generale, dall'inchiesta risulta che in Svizzera si siano insediate dalle 500 alle 600 neofite.
ATS/dg
02:49
CSI 18.00 del 20.08.15: Il servizio di Darco Degrussa
RSI Info 20.08.2015, 20:05
Contenuto audio
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