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Le specie esotiche stanno colonizzando il bosco di Finges (Pfyngwald) in canton Vallese, mettendone a repentaglio la biodiversità. I lavori di lotta contro le piante non autoctone si stanno intensificando negli ultimi mesi. Il sito è stato dichiarato zona di protezione naturale già nel 1997.
Le piante non tipiche della regione stanno occupando vieppiù le superfici sconnesse, i bordi delle strade, le rive dei corsi d’acqua, i sentieri. Il canton Vallese è deciso a ripristinare il più possibile la situazione ed ha avviato importanti interventi di eradicazione delle piante esotiche. In cantiere altre misure per cercare di far scomparire il prima possibile tutte quelle specie vegetali che stanno invadendo la zona.
Il Vallese può contare sul sostegno economico della Confederazione, che ha recentemente approvato alcuni fondi da destinare alla Strategia sulla biodiversità in Svizzera. I costi, per quest’anno, ammontano a circa 100'000 franchi: il 65% a carico di Berna, il 25% a carico di Sion, il resto che sarà erogato da alcuni patriziati della zona.
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