Estudio florístico de las poaceas leñosas en el bosque andino sector Tangabana-Redondapamba de la parroquia Cañi, cantón Colta, provincia de Chimborazo.

Abstract

This research proposes the study of the floristic diversity of woody poaceas in the Andean forest of the Tangabana-Redondapamba in Cañi area, in Colta town, in Chimborazo province. For the sampling, the methodology of Gentry (1998) was used where 3 plots of 250m x 4m with a total area of 1000m2 were established. Samples of species with a diameter at breast height (DBH) greater than 2.5 cm were collected, then the samples were dried and transferred to the ESPOCH herbarium for identification. The data obtained in the field was tabulated and the diversity indices were calculated where established formulas were used. Finally, a proposal for the use of woody poacea was developed. In the Andean forest, 563 individuals belonging to 21 families, 29 genders and 31 species were recorded. The species with the highest abundance in the three plots is Olyra ciliatifolia of the Poaceae family with 222 individuals, followed by Alnus acuminata Kunth of the Betulaceae family with 103 individuals. In the forest, there was a variety of tree species whose dominance was low since only 12 of the 36 species present in the forest were found in the 3 plots. The family that stood out is the Solanaceae family with 3 genera and 6 species, that is, it was present in 17% of the forest. The species with the highest IVI is Alnus acuminata Kunth of the Betulaceae family with a value of 108.19% and the lowest IVI is Maclenia rupestris of the Ericaceae family whose value is 1.25%. The forest presented high diversity according to the values obtained in the Simpson and Shannon-Weaver diversity indexes, which resulted in 0.79 and 2.264 respectively. In the Sorens index, the values between the plots were for A-C / 0.667 and B-C / 0.653, this indicated that they are quite similar in terms of diversity. While between plots A-B the value of 0.766 is determined, which represents very similar plots. It was sought to obtain the greatest amount of raw material while preserving the species for the proposal of management and use of the poaceas. In addition, it is recommended to implement more studies in the Andean forests since they present a great floristic richness.