I resti di antichissime palafitte (le più vecchie risalgono al neolitico) nell'Inkwilersee sono minacciati dai castori. Ora le autorità corrono ai ripari con l'installazione di una griglia metallica a protezione del sito archeologico situato su un’isola tra i cantoni Berna e Soletta.
I danni causati dai castori sono stati osservati nel 2018 da una squadra di sommozzatori del servizio archeologico bernese: i roditori si sono insediati sull’isola e scavando diverse gallerie sotterranee hanno intaccato antico legname da costruzione.
Uno strato di legname preistorico a ridosso dell'isola danneggiato dai castori
Si tratta di “preziosi reperti che sono andati persi” si legge in una nota diffusa martedì.
L'accesso a una galleria sotterranea scavata dai castori
Il progetto di protezione - che sarà realizzato nell'inverno 2023/24 - impedirà ai castori di effettuare ulteriori scavi nel sito archeologico: con un investimento di circa 800'000 franchi sarà posata una griglia metallica attorno a tutta l'isola. Per i roditori sarà creata una tana alternativa.
Il castoro non è più a rischio estinzione
Telegiornale 13.12.2016, 21:00
Palafitte patrimonio dell'Unesco
Telegiornale 30.05.2021, 22:00
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