Abstract

BECK, Stephan G. et al. The tropical montane forests of the Apa-Apa Mountain in Bolivia: a floristic hotspot and an essential water resource. Ecología en Bolivia [online]. 2024, vol.59, n.2, pp.85-151.  Epub Sep 31, 2024. ISSN 1605-2528.

The tropical montane forest of the Andes harbors high biodiversity threatened by increasing deforestation. The Andean region of Bolivia is missing studies about their plant species composition and richness. One area of particular interest is the Apa-Apa Mountain range in Sud Yungas, La Paz. The aims of this review are: a) to provide a taxonomically updated list of vascular plant species from the montane humid forest and its secondary vegetation, b) to quantify endemic and threatened species, c) to classify, characterize and map the vegetation types, d) to describe the flora of the different vegetation types, and e) to highlight the importance of forest conservation in this area. We made a partial inventory of vascular plants in the montane humid forest from 1,800-2,600 m, based in collections from the study area during 40 years. We found high species richness of vascular plants. Our species list includes 1,439 species in the Apa-Apa Mountain, from which 151 are endemic, and 80 are new species, highlighting its high diversity. We classified, characterized and mapped the vegetation types of the area, distinguishing four main vegetation groups: the montane humid forests, the seasonal humid forests, the seasonal sub-humid forests, and the dry xeric forests. We also include a characterization of secondary vegetation. This study provides a fundamental basis for future research and conservation efforts in the area. Our results highlight the importance of promoting the conservation of these forests to maintain their great biodiversity and to ensure access to water for local populations.

Keywords : Andes; Tropical montane forest; Vascular plants list; Vegetation types; Yungas.

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