Diversidad y abundancia de malezas presentes en pasturas de las zonas ganaderas de la parroquia Chorocopte - Cañar

Abstract

The present investigation had the purpose of determining the botanical composition, diversity and abundance of weeds present in the pastures of the Chorocopte parish, which was carried out in five altitudinal ranges: floor one that goes from 3168 to 3368 m s.n.m., floor two of 3368 at 3568 m s.n.m., floor three from 3568 to 3768 m s.n.m., floor four 3768 to 3968 m s.n.m. and floor five from 3968 to 4168 m s.n.m. In this place, UPA's of 500 m2 were established to carry out the sampling. In each site, the number of species and the number of individuals per species were counted, and the diameter of the weed stem (mm) was recorded. In the data analysis, variables such as: relative density (DR), relative frequency (FR), relative dominance (DmR) and Importance Value Index (IVI) were determined; likewise, the Shannon diversity index (H') and the Margalef richness index (DMG) were estimated. Regarding the botanical composition, 39 species of weeds were recorded in the Chorocopte parish, which are within 19 families; the family with the highest species richness was Asteraceae, Poaceae, with 7 and 6 species respectively; the most important species in the parish are: Agropyron repens, Holcus lanatus, whose importance value indices (IVI) are: 9,21 and 8,42. For the community studied, an H' of 0,99 and a DMG of 2,99 were recorded.