Artículos de revistas
Relationship between the genetic structure of the Andean toad Rhinella spinulosa (Anura: Bufonidae) and the northern Chile landscape (21°-24° S)
Fecha
2011Registro en:
Revista Chilena de Historia Natural, Volumen 84, Issue 3, 2018, Pages 391-406
0716078X
07176317
10.4067/S0716-078X2011000300007
Autor
Gallardo, Carolina E.
Hernández, Héctor J.
Diniz-Filho, José A.F.
Palma, R. Eduardo
Méndez, Marco A.
Institución
Resumen
We analyzed the relationship of landscape and environmental features on the genetic differentiation of Rhinella spinulosa (Wiegmann, 1834) in the Altiplano of Antofagasta (Chile). We performed three types of analyses at different spatial scales: (1) Considering all populations; (2) Grouping populations by watershed and by sub-watershed; and (3) Using the results of a spatial analysis of molecular variation (SAMOVA). Landscape features were incorporated using Geographic Information Systems, with three hypothetical dispersal models: (1) Euclidean distance (null model); (2) Least cost based on wetland locations; and (3) Least cost based on least slopes. We also included differences in temperature, precipitation and altitude among localities. The Akaike information criterion was used to select the best model and the relative importance of each variable in the model was estimated with partial regressions. We found a high genetic differentiation among populations (F st = 0.693) and isolation