Evaluation of the biodiversity contained in the green infraestructure components of Algarrobo

The present study intends to evaluate the biodiversity contained in the green infrastructure components of Algarrobo, Chile. For this purpose, the green infrastructure components were identified and then analyzed in terms of the biodiversity of avifauna and vegetation they harbored. To achieve this, several bird counts and floristic inventories were performed during the spring of 2016 and the summer of 2016-2017. This information was then used to calculate different biodiversity indexes, the proportion of native species, endemic species and species in conservation category. Subsequently, the components were compared using different statistical methods acompanied by a cluster analysis, in order to distinguish those sites that require more attention than others. In general, it was possible to identify a large number of species and individuals, some native species of vegetation and several native species of avifauna, a greater number of endemic species of vegetation than avifauna, and a very small number of species in conservation categories. The type of components that presented a better situation were the scrubland, and the specific components that exhibited the best conditions were the water courses that are concentrated toward the southern zone of the study area along with the largest forest. In contrast, the areas that require more attention were the urban typologies: sports and leisure facilities, urban green areas and private gardens. In addition, the forests and wetlands are the most threatened natural components.