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Universidade de Brasília (2013)

As faunas de serpentes da América do Sul e Austrália : ecologia, biogeografia e evolução

Leite, Davi Lima Pantoja

Titre : As faunas de serpentes da América do Sul e Austrália : ecologia, biogeografia e evolução

Auteur : Leite, Davi Lima Pantoja

Université de soutenance : Universidade de Brasília

Grade : Doutorado em Ecologia 2013

Résumé
This paper evaluates in a comparative context the physical and ecological scenarios in which South America and Australia diversified and assembled their present biotas. It offers a framework for biological comparisons between these continents : (1) providing a list of basic bibliography ; (2) describing the geographic and climatic history of both continents and their present environments ; and (3) highlighting the supports for biological comparisons between South America and Australia. The biota assembly is consequence of historical-biogeographic events, past ecological relationships, and phylogenetic constraints, molded by present ecological interactions. The “natural” experiment offered by anciently disconnected continents is useful to interpret how community ecology and biogeography interact in developing the structure of present biotas. Both South America and Australia are similar in many ways, such as Gondwanan origin, present latitudes, general landscapes and ecosystems, among others. Most of both continents are covered by open structured habitats. For instance, South American Cerrado and Arid Australia are mostly covered by grassland and bush vegetation, very dry periods, poor, acidic, and aluminum-rich soils, frequent disturbance caused by fires, and abundant and diverse faunas of lizards and termites. Besides obvious particularities observed in the extant biota of each continent, shared lineages and convergences may account for similarities between biotas. The historical and contemporary scenarios of South American and Australia, including a set of similarities between present environments, support biological comparisons between these continents.

Mots clés : Comunidades biológicas Ecologia - América do Sul Historiografia - análise Serpente

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