Comment on "The extent of forest in dryland biomes".

Marcelino de la Cruz Pedro Francisco Quintana-Ascencio Luis Cayuela Carlos Iván Espinosa Adrián Escudero

Published in: Science (New York, N.Y.) (2017)

The study by Bastin et al (Reports, 12 May 2017, p. 635) is based on an incomplete delimitation of dry forest distribution and on an old and incorrect definition of drylands. Its sampling design includes many plots located in humid ecosystems and ignores critical areas for the conservation of dry forests. Therefore, its results and conclusions may be unreliable.

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