Ricardo Jannini Sawaya

• Abstract

  To understand the main factors structuring biodiversity is a major challenge in ecology. It is possible to test multiple structuring processes, including biogeographical, ecological and neutral, from recent theoretical and analytical advances in metacommunity ecology. Species diversity is often treated as a representative property of community structure, and more widely of metacommunities…

  New approaches to ecology and conservation: phylogenetic and functional diversity of amphibians and snakes of Brazilian Atlantic Forest, AP.R

• Abstract

  We aim to describe phylogenetic, biogeographic and ecological patterns of snakes while focusing mainly on the Neotropical fauna. Further, we will explore the evolutionary processes involved in the origin of these patterns. We will use a multidisciplinary approach to investigate the evolution of the species throughout a time interval that extends from the Cretaceous to the Recent. The proj…

  Origin and evolution of snakes and their diversification in the Neotropics: a multidisciplinary approach, AP.BTA.TEM
• The genetics of isolation: island speciations, gene flow, and population structure in bothrops jararaca complex., AR.EXT

• Abstract

  Communities can be defined as populations occurring together across time and space, and the processes related to the permanence of these populations are studied from the assembly of communities. The biodiversity can be measured by differents methods, such as alpha-diversity and phylogenetic diversity. Methods based on phylogenies can infer processes of assembly of communities, showing dif…

  Environmental and biotic influences: understanding acoustic diversity in anuran amphibian communities of Atlantic Forest, BP.MS

• Abstract

  Studying the geographic distribution patterns of organisms and the processes that generate such patterns is fundamental to Biogeography. It is believed that the diagonal development of South American open vegetation, which includes Cerrado, Caatinga, Chaco and Pampas, corresponded to a vicarious process for several groups of forest animals and plants. We suggest to test this hypothesis us…

  Evolution of the distribution patterns of forest jararacas, BP.IC

• Abstract

  The organisms show individual geographic distribution patterns that not result of chance. Several past and current events are responsible for the presence of sets of taxa in a given area. The accumulation of events over time makes the reconstruction of the history of the spatial distribution of the biota a complex activity that can be explored in the light of historical biogeography. This…

  Historical biogeography of the snakes from open landscapes in South America, BP.PD

(Only some records are available in English at this moment)

• Abstract

  Biological diversity can be defined as the variety and abundance of species in a defined place. It could be measured by its species number (alpha diversity) and the phylogenetic diversity. The functional diversity could be defined as the component of diversity that influences the ecosystem, generally measured from functional characteristics of organisms. In chorus systems presented by dif…

  Functional and acoustic diversity of anuran communities, BE.EP.MS

• Abstract

  The identification of natural biogeographical regions is fundamental for comparisons in broad-scale ecological and evolutionary studies, and constitutes an essential tool for conservation planning. Several recent ecological and biogeographical studies have attempted to delimit bioregions at both global and local scales, and there is a long history of regionalization schemes proposed for t…

  Unveiling the hidden limits of species clusters: a cross-methodological approach to identify bioregions of neotropical snakes, BE.EP.PD