title: [Ant diversity (Hymenoptera: Formicidae) from capões in Brazilian Pantanal: relationship between species richness and structural complexity].
abstract: Species richness of epigeic ants was surveyed in forest islands named capões of Brazilian Pantanal and related with their structural complexity. The ants were collected using pitfall traps in 28 capões from Rio Negro Farm, in Aquidauana municipality, Mato-Grosso do Sul state, Brazil. The structural complexity of capões was evaluated by measuring vegetation density and litter quantity near the pit-fall traps. Seventy-one species, distributed in 26 genera and seven sub-families were found. Ectatomma edentatum Roger (Formicidae: Ectatomminae) and one species of Pheidole were the most frequent species. Species richness was positively correlated only with herbaceous vegetation density of capões, supporting the idea that the increase in environmental heterogeneity diminishes species competition, allowing species co-occurrence.
authors.affiliation: Depto. Estudos Básicos e Instrumentais, Univ. Estadual do Sudoeste da Bahia, Itapetinga, BA, 45.700-000. correamm@uesb.br
authors.forename: Michele M
authors.initials: MM
authors.lastname: Corrêa
authors.forename: Wedson D
authors.initials: WD
authors.lastname: Fernandes
authors.forename: Inara R
authors.initials: IR
authors.lastname: Leal
mesh_terms: D000818:Animals; D001000:Ants / Q000145:classification*; D001938:Brazil