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Una massiccia presenza di meduse d'acqua dolce è stata registrata nei laghi Verbano, Ceresio e Lario. La specie riscontrata nei laghi pre-alpini è grande come una moneta, arriva dall'Asia ed stata segnalata dagli uffici dell'ambiente delle province di Como e di Varese. L'animale, ci tengono a precisare, è innocuo in quanto non urticante.
Per il momento è ancora da chiarire come la piccola medusa, già avvistata in passato anche in Ticino, sia arrivata a ridosso delle Alpi. Si pensa che la sua proliferazione sia stata favorita dal gran caldo che ha caratterizzato questa estate.
Marco Marelli/CSI/se
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