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According to assemblage theory, three factors regulate fish biogeography: restriction of dispersion, environmental restrictions and biotic interactions. The first two factors act on a regional scale and delimit the area of action of the third, which operates on a local scale. Salmonid introductions began in Patagonia in 1904, and this has led to a restructuring of trophic webs and an increase in the...
Events such as volcanic eruptions may act as disturbance agents modifying the landscape spatial diversity and increasing environmental instability. On June 4, 2011 the Puyehue–Cordon Caulle volcanic complex located on Chile (2236m.a.s.l., 40° 02′ 24″ S- 70° 14′ 26″ W) experience a rift zone eruption ejecting during the first day 950millionmetrictons into the atmosphere. Due to the westerly winds predominance,...
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