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Universidad de Buenos Aires (2010)

Altitudinal diversity patterns in epigaegic beetles and ants from north-western Patagonia, Argentina

Werenkraut, Victoria

Titre : Altitudinal diversity patterns in epigaegic beetles and ants from north-western Patagonia, Argentina

Patrones altitudinales en la diversidad de coleópteros y hormigas epígeos del noroeste de la Patagonia argentina

Auteur : Werenkraut, Victoria

Université de soutenance : Universidad de Buenos Aires

Grade : Doctor en el área de Ciencias Biológicas 2010

Résumé
This study analysed the influence of methodological and biological factors on the altitudinal diversity patterns in arthropods, with emphasis in beetles and ants. At global scale, a meta-analysis of 109 published gradients showed that the altitudinal pattern in arthropod richness has multiple forms, although the perception of the pattern can be influenced by the method used to identify the form and the quality of basic data. At local scale, a field-study developed in five mountains, in north-western Patagonia, Argentina, showed altitudinal changes in the composition of beetle’s and ant’s species assemblages, associated with different environmental variables, and a fine subdivision of environments. The altitudinal patterns in the species richness and abundance of individuals differed substantially between beetles and ants. The high diversity of beetles and the low diversity of ants were confirmed. Both taxa showed the dominance of a few, very abundant species, and a lot of rare species. Different environmental factors accounted for local variations in diversity in different environments along the altitudinal gradient, and differentially affected beetles and ants.

Mots clés : GRADIENTES ALTITUDINALES ; PATAGONIA ; INSECTOS ; META-ANALISIS ; DIVERSIDAD ; ALTITUDINAL GRADIENTS ; PATAGONIA ; INSECTS ; META-ANALYSIS ; DIVERSITY

Présentation (Biblioteca Digital)

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Page publiée le 5 octobre 2017, mise à jour le 12 février 2020