Chrysomelidae (insecta/coleoptera) como biondicadores de qualidade ambiental em áreas de Cerrado no estado de Goiás -Brasil
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2011-03-18
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Universidade Federal de Goiás
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Knowledge 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.
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PIMENTA, Mayra. Bioindicators Chrysomelidae ( INSECTA/COLEOPTERA) enviromental quality in cerrado vegetacion in central Brazil. 2011. 144 f. Tese (Doutorado em Ciências Agrárias) - Universidade Federal de Goiás, Goiânia, 2011.