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MONTESINOS-TUBEE, Daniel B. et al. Floristic diversity, plant communities and conservation proposals of the riparian forest in the Chili River (Arequipa, Peru). Arnaldoa [online]. 2019, vol.26, n.1, pp.97-130. ISSN 1815-8242.

The floristic diversity of the riparian forest of the Chili River along the riverbed that crosses the city of Arequipa (province and department of Arequipa) in the districts of Alto Selva Alegre, Cayma, Yanahuara, Cercado, Sachaca, Tiabaya and Uchumayo was studied. Forty-five sampling areas were selected where 245 species of flora (Magnoliophyta and Pteridophyta), divided into 177 genera and 66 families, were identified. An alliance and two associations are described as new syntaxonomic units according to the Braun-Blanquet phytosociological school and classified using the TWINSPAN software. The diversity of endemic species occurs in areas of rocky outcrops where the valley is narrower or encased, while the diversity of native species occurs along the entire riverbed. However, the presence of introduced species is higher in the middle part of the portion of the river that crosses the city. The correlation between environmental variables and floristic species with respect to the sampling locations was evaluated using the Canoco 5.0 software. Likewise, a trend assessment in case of flood due to increase in river flow has been carried and how it could affect the riparian forest, as happened in 1989, 1999 and 2012. In reference to conservation, it is suggested to preserve the fluvial and terrestrial ecosystems coexisting in the urban section and to lead to a sustainable development to improve the quality of life of the inhabitants. The different planning and management processes within the Chili river basin require an autonomous authority that could indicate the lines of action, continuous evaluation, monitoring and that include in the programs the active participation of citizens, and conduct and enhance the management and conservation plans of the riparian forest in the medium and long term period

Palavras-chave : riparian forest; phytosociology; floristics; conservation; Arequipa Province; Peru.

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