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Item Predição de tetrápodes ameaçados no cerrado baseada na relação espécies-área(Universidade Federal de Goiás, 2011-02-18) ROVIDA, Julio Cola; SILVA, Daniel de Brito Candido da; http://lattes.cnpq.br/5139765780779893The current rate of extinctions observed in the entire planet has its origin in high rates of habitat loss due to human population increase. The species-area relationship may be usefull in predicting extinction threats when combined with this loss. Lists of Cerrado s tetrapods were compiled and using the species-area relationship, we predicted values of species a threat. These values were compared with the IUCN Red List. The predictions of threat in all cases were higher than the Red List, except for endemic mammals that reflect the current threat list, and endemic birds whose predictions are lower than the threat level by IUCN. A large portion of species have populations in decline according to IUCN. Part of these results can be explained by a time-lag in the response time to the degradation itself associated with the gaps of knowledge about the species. The relationship could be used as a preliminary threat assessment, and followed by the aggregation of these red lists in order to increase efficiency in conservation planning. Life history, spatial and environmental heterogeneity data, when aggregated, should increase the prediction s accuracy. Major investments in basic biology are necessary in order to achieve maximum information input about the species to be evaluated.Item Regras de Assembleia em aves do Cerrado: estrutura funcional em diferentes escalas espaciais(Universidade Federal de Goiás, 2011-05-26) SOBRAL, Fernando Landa; CIANCIARUSO, Marcus Vinicius; http://lattes.cnpq.br/3421612628316830Communities are assemblages of co-occurring species that potentially interact with each other. They are the result not only of a series of ecological processes or "assembly rules", but also of past and ongoing evolutionary processes. In recent years, the assembly rules have received increased attention from ecologists and two different processes have been explored: environmental filtering and limiting similarity. As the processes involved in the formation of the assemblages appear to vary in a manner dependent on scale, it is expected that such assembly rules have different effects over different spatial scales. Understanding this relationship between ecological processes and spatial scales in which they act has been a great challenge among scholars. In this context, the incorporation of phylogenetic and functional data to diversity classical approaches have established the basis for an emerging area of research in community ecology, promoting the development of many tools to detect the underlying structure of the assemblages and, therefore, to infer the processes assembly responsible for the formation of the assemblages. Here, we demonstrate how the use of different measures of phylogenetic and functional diversity along with the use of different null models can be a promising approach in solving paradigms still poorly understood, discussing how such methods can increase the predictive power of this growing area of research.