Estudio de la diversidad florística del parámo de Navag, sector Quillotoro, cantón Colta, provincia de Chimborazo

Abstract

The present study evaluated the composition and floristic structure of the Navag moorland ecosystem, Quillotoro sector, using an adapted version of the GLORIA method, suitable for Andean páramos. The research was carried out in a total area of 1000 m², distributed in 40 plots of 25 m², subdivided into units of 1 m² to record the coverage of the species present. The results indicated a moderate floristic diversity, identifying 17 families, 15 orders, and 38 species. The Simpson (0.434) and Shannon (1.387) diversity indices reflect a medium diversity, mainly attributable to the preponderance of the Poaceae family, especially the species Calamagrostis intermedia (J. Presl) Steud. and Agrostis breviculmis Hirtchc, which play a predominant role in the conformation of the ecosystem. The observed diversity may be influenced by the condition and degree of alteration of the páramo. Invasive species, such as Taraxacum officinale and an introduced species of the Malvaceae family (not yet determined), were identified, suggesting alterations in the ecosystem. Likewise, overgrazing has favored the expansion of Lachemilla orbiculata (Ruiz & Pav.) Rydb. Although the area is mainly dominated by herbaceous páramo with a predominance of grassland, areas with high humidity were observed that host species such as Gunnera magellanica Lam. It should be noted that although the Asteraceae family showed greater species richness, its density, and ecological relevance values were relatively low.