Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Diversidad de Scolytinae (Coleoptera : Curculionidae) de dos comunidades áridas de Baja California Sur

Auteur : Vega Romero, Diego

Etablissement de soutenance : Centro de Investigaciones Biológicas del Noroeste (CIBNOR)

Grade : Maestría en Ciencias en el Uso, Manejo y Preservación de los Recursos Naturales 2017

Résumé
The Baja California Peninsula stands out as one of the driest regions of México. Due to its tropical origin, the south portion, or also known as cape floristic region, features distinct aridity than the rest of the peninsula. Among the different taxa that has been studied here, the Insecta Class is of interest since it features a high rate of endemism, as well as biological patterns representative of the environment. The Scolytine subfamily (Coleoptera : Curculionidae) gathers approximately 6000 species that live and mate predominantly on angiosperms, attracted by wood fermentation compounds. In Baja California Sur this group remains almost unknown, so in this study the species fluctuation and diversity of bark beetles between two locations with different rates of aridity is evaluated. The samping took place in two locations : El Comitán, considered more arid and El santuario de los Cactos, considered less arid. At each location 20 traps were set (10 aereal, 10 pitfall). A third location was chosen in substitution of Santuario de los Cactos, because, for unknown reasons, the first 6 months not even the mínimum data to work was captured. The locations were visited every 15 days for a year. 403 especimens from 23 morphospecies were colected, 21 species were identified, 13 are new records for the state. A dichotomous key, a taxonomic list and images of the species are presented. The abundance and richness is greater in San Bartolo, the diversity indexes indicate to San Bartolo as the location with greater dominance, nevertheless it is not more diverse than El Comitan. The temporal structure from each location shows different fluctuation, but is not correlated with local weather.

Mots Clés : Scolytinae ; zonas áridas ; diversidad

Présentation

Version intégrale (3,11 Mb)