Diversidad arbórea asociada a Bursera graveolens (Kunth) Triana & Planch. en tres localidades de la costa ecuatoriana

Abstract

Dry forest ecosystems play an important role into the environment maintenance equilibrium, are fragile ecosystems and highly danger by anthropogenic activity. This research has as objective evaluate the vegetal species that accomplish the Brusera graveolens (Kunth) Triana & Planch in three locations of Ecuadorian coast. Were used a systematic sampling with plots of 570 meters’ length and a 20 meters’ width. For the vegetal communities’ characterization, will be used four quadrants with 12 sample dots, which were located following a pattern in spaced centers with a 45 meters’ interval. The quadrants had 10 x 10 meters’ dimensions. Into each one were registered individuals of each specie present in each locality. Subsequently were used Simpson indexes (D), Shannon (H’) and Pielou (J) for each locality and used a group analysis (cluster) which used measures to make groups (distances) and is based about Jaccard index to group the plots about the similarity at Joa, Mahalilla and Santa Elena with those data were created a matrix multiplying the data matrix for its transposed, allowing quantified the concurrence of each specie in the plots. The results showed that San Marcos dry forest has a greater species wealth, whereas this are better distributed at Joa. These findings reflex the ecological complex relations into the studied ecosystems. The results stand out the importance of considerate the species interactions in the ecological studies for a most and deep comprehension of ecosystem dynamics.