Riqueza de formigas (Hymenoptera, Formicidae) epigéicas em povoamentos de Eucalyptus spp. (Myrtaceae) de diferentes idades no Rio Grande do Sul, Brasil

Abstract

ABSTRACT. Richness of epigaeic ants (Hymenoptera, Formicidae) in Eucalyptus spp. plantations with different ages in Rio Grande do Sul, Brazil. The present study describes the epigaeic ant communities in eucalyptus plantations in sandbank in Rio Grande do Sul State. Ant collections were performed in six plantations of Eucalyptus grandis Hill ex Maiden and Eucalyptus saligna Smith with ages varying between five to 31 years old. A total of 24 areas (four/area) were randomly selected for ant collections. In each one, three transects of 100 m were designed at intervals of 12 m. Along each transect, ten pitfall traps with sardine baits were placed, at intervals of 10 m for a 24-hour-period. A total of 21,033 ants were collected, belonging to five subfamilies, 12 tribes, 19 genera and 49 species. According to the jackknife estimator of first order, there was no significant difference between the ant communities richness considering the eucalyptus species (U = 81.500; g.l. = 1; P = 0.582) and the ages of the plantations (U = 2.504; g.l. = 3; P = 0.547). Results indicate that richness of ant species are not related to the species of eucalyptus and/or to the age of the forests planted in sandbanks.

Epigeic ants (Hymenoptera: Formicidae) in vineyards and grassland areas in the Campanha region, state of Rio Grande do Sul, Brazil

“…Fonseca and Diehl 2004;Schimidt and Diehl 2008;Albuequerque and Diehl 2009). The low richness found in these studies is probably due to differences in methodology and sampling effort, as well as to the fact that a few of these studies were carried out in altered environments which are not representative of the local natural environments.…”

Richness of Termites and Ants in the State of Rio Grande do Sul, Southern Brazil

“…and Tramandaí (29° 59' S, 50° 13' W; 8 m a.s.l.) in the northern Coastal Plain (Fonseca & Diehl, 2004 At each termite sampling site, we established a transect (100 m x 3 m), further divided into 20 sections of 15 m 2 . We then sampled ten non-contiguous sections on the right and left sides of the transect alternately, with a sampling effort of 60 minutes per section.…”

Análise faunística das formigas epígeas (Hymenoptera, Formicidae) em campo nativo no Planalto das Araucárias, Rio Grande do Sul

“…em áreas de restinga (Fonseca & Diehl 2004) e 45 em áreas de minas de cobre . Fica claro que o extremo sul do Brasil, por estar mais afastado da zona equatorial, apresenta uma riqueza de espécies menor do que nas zonas tropicais (Kuznezov 1957;Ward 2000), sendo que, em Manaus, por exemplo, foram encontradas mais de 300 espécies de formigas (Benson & Harada 1988), enquanto no cerrado foram registradas 333 espécies (Silvestre et al 2003).…”