INVESTIGADORES
MATTONI Camilo Ivan
artículos
Título:
Biogeographic history of southamerican arid lands: A view from its arthropods
Autor/es:
ROIG-JUÑENT, S., M. CECILIA DOMÍNGUEZ, G. E. FLORES, & C. I. MATTONI
Revista:
JOURNAL OF ARID ENVIRONMENTS
Editorial:
ELSEVIER
Referencias:
Lugar: Amsterdam; Año: 2006 vol. 66 p. 404 - 420
ISSN:
0140-1963
Resumen:
Arid and semi-arid ecosystems in South America include several different
habitats, such as the Peruvian and Atacama Deserts of the Pacific Coast, Monte
Desert of central Argentina, Patagonian steppes, Chaco xeric woodlands, Andean
Puna, and Brazilian Cerrado and Caatinga. All these areas belong to two biotic
tracks, one stretching from Patagonia to the Peruvian coastal desert provice,
at approximately 5º latitude South in
the Pacific coast of Peru and the second stretching on the coasts of the
Atlantic ocean, from northern Patagonia to Caatinga. Twenty-one
natural areas have been recognized and seventeen taxa of Arthropoda were
analyzed applying pa pppralogy-free subtrees, using the TASS program. The
obtained data matrix was analyzed using N NONA and TNT programs. The strict consensus tree (parenthetical notation
of the best relationship) shows that the first areas to become separate from
the rest were Caatinga, septentrional deserts of Chile and Peru, the
Uspallata-Calingasta Valley, and the natural areas from the western and eastern
slopes of the Andes. The vicariant event most clearly correlated with the
cladogram is the uplifting of the Andes mountain chain, which attained 3000 m
in the Quechua phase, between 14-11 Ma in the middle Miocene. This event split,
until present time, the taxa into occidental groups (from the central area of
Chile) and oriental groups (from Argentina), and also generated the natural
areas of Puna. The general area cladogram shows that Monte and Puna are not
areas that were we
we wereisolated
from the rest and evolved separately, because the considered sub-areas are
linked to other biogeographical provinces. The five areas that form Patagonia
are all related.