South America, Mountain, elevational gradients, Neotropics, freshwater, river, América del Sur, Neotrópico, río, agua dulce, gradientes altitudinales, montaña, Essay, South America, Mountain, elevational gradients, Neotropics, freshwater, river, América del Sur, Neotrópico, río, agua dulce, gradientes altitudinales, montaña, Essay, South America, Mountain, e...
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