Parque Nacional Sajama, Sajama (Bolivia). Very few plant species occur at the highest altitudes – such as these Polylepis trees on the Bolivian altiplano. (IMAGE)

University of Göttingen

Parque Nacional Sajama, Sajama (Bolivia). Very few plant species occur at the highest altitudes – such as these Polylepis trees on the Bolivian altiplano.

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Parque Nacional Sajama, Sajama (Bolivia). Very few plant species occur at the highest altitudes – such as these Polylepis trees on the Bolivian altiplano.

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P Weigelt

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