Diversidade de formigas não desfolhadoras (Hymenoptera Formicidae) em área de cerrado “stricto sensu” e Eucalyptus cloeziana F. Muell

Abstract

This study was developed in a system made up ofan área of"stricto sensu" cerrado and contiguous Eucalyptus cloeziana monocultures with a view to evaluating the influence ofthe system upon community parameters ofnon-leafcutting ants. The community parameters analysed were species diversity and its components richness and equitability, in addition to similarity and dominance. A total of34,879 Formicidae individuais belonging to five subfamilies, 16 genera and 45 morfospecies was collected. The results obtained revealed that diversity and its components richness and equitability were statistically superior in the habitats made up of cerrado "stricto sensu", but no occurrence ofthe edge effect was found, stood for the increase ofdiversity and richness of Formicidae in the meeting área between the cerrado "stricto sensu" and the Eucalyptus cloeziana monocultures. The similarity between habitats evaluated by the Sorenson coefficient showed high values in the whole of the comparisons performed, denoting a high overlapping of the Formicidae fauna in the habitats studied and high number of euriecious species. Camponotus (two species), Crematogaster (two species), Pheidole (one species), Tapinoma (one species) and Zacryptocerus (one species) were dominant only in cerrado "stricto sensu". Pheidole (three species) were dominant only in E. cloeziana monocultures. Brachymyrmex (one species), Camponotus (two species), Ectatomma (one species), Paratrechina (one species), Pheidole (two species) e Solenopsis (one species), were dominant in both cerrado "stricto sensu", and E. cloeziana monocultures.