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Item Chrysomelidae (insecta/coleoptera) como biondicadores de qualidade ambiental em áreas de Cerrado no estado de Goiás -Brasil(Universidade Federal de Goiás, 2011-03-18) PIMENTA, Mayra; MARCO JÚNIOR, Paulo de; http://lattes.cnpq.br/2767494720646648Knowledge of the composition of natural communities and their responses to anthropogenic alterations is essential for determining the conservation status of a given system and prioritizing management actions. Anthropogenic impacts could cause a reduction in biodiversity not only due to habitat loss, but also due the loss of habitat heterogeneity across given landscape, especially in systems characterized by a mosaic of different elements (e.g. the Cerrado vegetation in central Brazil). Here we evaluate leaf beetle Coleoptera/Chrysomelidae) as bioindicators in a system whith varying intensities of human impacts and different phyto-physionomies (from open field to forests). We collected 1117 leaf beetle belonging to 245 species, of which 12 species and 5 genus were considered possible bioindicators based on IndVal measure. Higher species richness was observed in forests and regenerating fields, and habitats with lower species richness included pastures, mines and veredas. Only the Eucalyptus areas had a high abundance of Chrysomelidae, followed by forests and the other habitats, which were not significantly different from each other. Natural fields, regenerating fields, natural cerrados and forest had higher values of β-diversity. In general, the proportion of Chrysomelidae over total Coleoptera and over herbivorous Coleoptera were not able to distinguished among the habitats. The large number of rare leaf beetle species, the high proportion of restricted species and the high β-diversity of the natural areas made it difficult to utilize individual of species as a bioindicator. The use of the genus Chrysomelidae as a biondicator of habitat quality, was considered more effective than using individual species. Bioindicator systems that include not only species richness and abundance but also assemblage composition are needed to allow for a better understanding of Chrysomelidae response to environmental disturbance. OBS: Summary of chapter 1. Thesis with three chapters.Item Padrões de distribuições espaciais e temporais de temperatura de superfície no bioma Cerrado: uma análise integrada a partir de dados orbitais de resolução moderada(Universidade Federal de Goiás, 2010-07-12) SANTOS, Nicali Bleyer Ferreira dos; FERREIRA, Nilson Clementino; http://lattes.cnpq.br/6466969611652630; FERREIRA JÚNIOR, Laerte Guimarães; http://lattes.cnpq.br/8647270006257055The occurrence of vegetation is an important factor regarding the maintainance of natural biogeochemical processes. In the Cerrado, the conversion of the vegetative cover into croplands and cultivated pasturelands has induced severe modifications in biophysical variables such as land surface temperatures, highly sensitive to land cover / land use changes. Thus, and aiming at a more complete understanding of the land conversion impacts on the Cerrado biophysical variables, in this study we assessed, through orbital data (MOD 11 product - Land Surface Temperature), the correlation between land occupation and thermal variability, considering 2003 imagery obtained at the beginning and end of the dry season. In particular, we investigated the LST behavior in relation to the major Cerrado land cover classes, as well as its response to the ongoing clearings. Our results confirmed higher temperatures over anthropic areas, as well as significant increases immediately following deforestations.