IADIZA   20886
INSTITUTO ARGENTINO DE INVESTIGACIONES DE LAS ZONAS ARIDAS
Unidad Ejecutora - UE
artículos
Título:
Environmental factors affecting the distribution of three armadillo species (Xenarthra, Dasypodidae) in Argentina
Autor/es:
SEITZ, VIVIANA PAOLA; CARRARA, RODOLFO; PUIG, SILVIA; VIZCAÍNO, SERGIO FABIÁN
Revista:
MAMMALIA
Editorial:
WALTER DE GRUYTER & CO
Referencias:
Lugar: Berlin; Año: 2016
ISSN:
0025-1461
Resumen:
p { margin-bottom: 0.25cm; line-height: 120%; }Environmentaltemperature, rainfall, vegetation structure, soil composition andland use were recognized as relevant factors limiting thedistribution of armadillos. The aim of this study was to identifyenvironmental and spatial factors influencing the geographicaldistribution of the most widespread armadillos occurring in Argentina(Chaetophractus vellerosus, Chaetophractus villosus and Zaedyuspichiy), through the most simple and accurate explanatory modeling.General linear models (GLMs), partitioning analyses of variance andhierarchical partitioning analyses were applied to estimate thespecies-environment relationships. Climatic variables were recognizedas the most relevant factors influencing the three speciesdistribution, consistent with that expected from the hierarchicalstructure theory in ecological systems. Optimal conditions weremainly arranged in a longitudinal geographic gradient forChaetophractus species and in a latitudinal-longitudinal gradient forZ. pichiy. The optimal habitat identified for C. vellerosus, largerthan previously documented, was characterized by warm, rainy summersand moderately cold, dry winters. The distribution of C. villosus wasmainly influenced by temperate conditions of temperature andisothermality, scarcity of rainfall with high seasonality and lowaridity conditions, and prevalence of sandy soils. Optimal habitat ofZ. pichiy was affected by low temperatures with high seasonality,scarcity of rainfall with aridity conditions and sandy soils.