La avifauna del cuaternario de argentina: inferencias paleoambientales a partir del registro de los Psittacidae

TAMBUSSI, C.; ACOSTA HOSPITALECHE, C. I. A.; HORLENT, N.

Monografía Societat d´Historie Natural de Balears en honor a Juan Cuerda Barceló

No Informado

Lugar: Palma de Mallorca; Año: 2007; p. 69 - 80

Abstract. QUATERNARY AVIFAUNA FROM ARGENTINA: PALAENVIRONMENTAL INFERENCES BASED ON THE PSITTACIDAE. Quaternary vertebrate record of South America, especially that of the Middle to Late Pleistocene and Holocene from the Pampean Region, is well known, since both biostratigraphic and radiometric dating points of view. Its study has allowed to know multiple aspects of the evolution and conformation of the southamerican biota. Fossil birds found in quaternary beds (37 species belonging to 18 families, five of which: Rheidae, Tinamidae, Vulturidae, Anatidae and Psittacidae, having species that show chorological changes during the Quaternary) reveal that several diagnostic features of the modern avifauna were already present since those moments. Except three, all the pleistocene species are living. Birds constitute a climatic sensitive group that allows reliable palaeoenvironmental inferences. Based on the analysis of climatic-environmental variables (particularly annual precipitations, temperatures and hydric indices), the possible palaenvironmental inferences derived from the Cyanoliseus patagonus fossil record (Psittaciformes) are restricted. Our results suggest more arid conditions that the present ones during the late Pleistocene-Holocene at the southeastern of the Pampean region.