Figure 1.
Study area. (A) Italy with arrow marking Vulcano Island, part of the Aeolian islands chain, northeast Sicily, (B) Vulcano Island, (C) Location of sample sites. Very low pH is 38°25′9″ N, 14°57′38″E, Ref 2 is 38°25′20″N, 14°58′3″E.
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