Updated list of ant species (Hymenoptera, Formicidae) recorded in Santa Catarina State, southern Brazil, with a discussion of research advances and priorities. A first working list of ant species registered in Santa Catarina State, southern Brazil was published recently. Since then, many studies with ants have been conducted in the state. With data compiled from published studies and collections in various regions of the state, we present here an updated list of 366 species (and 17 subspecies) in 70 ant genera in Santa Catarina, along with their geographical distribution in the seven state mesoregions. Two hundred and seven species are recorded in the Oeste mesoregion, followed by Vale do Itajaí (175), Grande Florianópolis (150), Norte (60), Sul (41), Meio Oeste (23) and Planalto Serrano (12). The increase in the number of records since 1999 results from the use of recently adopted sampling methods and techniques in regions and ecosystems poorly known before, and from the availability of new tools for the identification of ants. Our study highlights the Meio Oeste, Planalto Serrano, Sul and Norte mesoregions, as well as the deciduous forest, mangrove, grassland and coastal sand dune ecosystems as priority study areas in order to attain a more complete knowledge of the ant fauna in Santa Catarina State.
Lista atualizada das espécies de formigas (Hymenoptera, Formicidae) registradas no Estado de Santa Catarina, sul do Brasil, com discussão sobre avanços e prioridades na pesquisa. Uma lista de espécies de formigas registradas em Santa Catarina foi publicada recentemente. Desde então, diversos estudos com formigas foram realizados em várias regiões do Estado. Neste trabalho, compilamos os dados de trabalhos publicados e de coletas avulsas, e apresentamos uma lista atualizada das espécies de formigas, com menção à distribuição geográfica nas sete mesorregiões de Santa Catarina. São registradas atualmente 366 espécies (e 17 subespécies) de formigas em 70 gêneros no território do Estado de Santa Catarina, sendo que a região Oeste apresenta o maior número de registros (207 espécies), seguida do Vale do Itajaí (175), Grande Florianópolis (150), Norte (60), Sul (41), Meio Oeste (23) e Planalto Serrano (12). O aumento no número de registros em relação à lista de 1999 deve-se principalmente à incorporação recente de métodos de coleta diferenciados e à realização de coletas em regiões e ecossistemas outrora subamostrados, além da disponibilidade de novas ferramentas de identificação. Nosso estudo aponta as mesorregiões Meio Oeste, Planalto Serrano, Sul e Norte, assim como os ecossistemas Florestas Estacionais Deciduais, Mangues, Campos e Restingas, como prioritárias para o aperfeiçoamento do banco de dados da mirmecofauna catarinense
community richness and composition across a gradient from Eucalyptus plantations to secondary Atlantic Forest. Biota Neotrop. 11(1): http://www.biotaneotropica.org.br/v11n1/en/abstract?inventory+bn00811012011.Abstract: Secondary forests and exotic tree plantations are expanding across tropical landscapes. However, our current understanding of the value of these human-dominated forest landscapes for invertebrate biodiversity conservation is still very poor. In this paper, we use the leaf-litter ant fauna to assess invertebrate diversity in one commercially managed Eucalyptus plantation (four years old), two abandoned plantations of different regeneration ages (16 and 31 years), and one neighboring secondary Atlantic Forest in Southeastern Brazil. There was a clear gradient in species richness from the secondary forest to the managed Eucalyptus plantation; richness and diversity peaked in secondary forest and in the older regenerating Eucalyptus plantation. Significantly more species were recorded in secondary forest samples than in Eucalyptus plantations, but Eucalyptus plantations had a similar level of richness. Furthermore, a non-metric multidimensional scaling analysis revealed clear differences in species composition between the younger managed Eucalyptus plantation (understory absent) and habitats with sub-developed or developed understory. Eucalyptus plantations were characterized by an assemblage of widespread, generalist species very different from those known to occur in core forest habitats of southeastern Brazil. Our results indicate that while older regenerating Eucalyptus plantations can provide habitat to facilitate the persistence of generalist ant species, it is unlikely to conserve most of the primary forest species, such as specialized predators, Dacetini predators, and nomadic species. Keywords: Formicidae, habitat modification, eucalipt plantations, diversity. SUGUITURU, S.S., SILVA, R.R., SOUZA, D.R., MUNHAE, C.B. & MORINI, M.S.C. Riqueza e composição das comunidades de formigas em um gradiente de plantio de Eucalyptus a Mata Atlântica secundária. Biota Neotrop. 11(1): http://www.biotaneotropica.org.br/v11n1/pt/abstract?inventory+bn00811012011.Resumo: As florestas secundárias e plantações de espécies exóticas estão se expandindo nas paisagens tropicais. No entanto, nossa compreensão sobre o valor destas florestas para a conservação da biodiversidade de invertebrados ainda é incipiente. Neste trabalho, usamos a fauna de formigas de serapilheira para avaliar a diversidade desses insetos entre três florestas de Eucalyptus, sendo uma comercial (quatro anos de idade) e duas abandonadas em diferentes idades de regeneração (16 e 31 anos) e uma área de Mata Atlântica secundária. A riqueza total foi mais alta na floresta secundária e nos plantios de Eucalyptus abandonados há mais tempo. A densidade de espécies na floresta secundária foi significativamente maior quando comparado as plantações de Eucalyptus, mas não difere entre eucaliptais; análise de ordenação revelou diferenças na composição de espé...
Ants often colonize twigs in the leaf litter, but some species use this resource more frequently than others. We analyzed the composition of the community and the diameter of colonized twigs to test if any species had a size preference. Samples were collected in different vegetation habitats (urban parks, eucalyptus plantations and native forests). In each site, all twigs with an ant colony in six 16-m2 plots were collected and measured, and the ants occupying them were identified. For the analyses, we only included species recorded in 10 or more twigs; these species were considered “common inhabitants” of the twigs (approximately 19.7% of the fauna analyzed). Our results indicate that the community is richer and uses a larger number of twigs of different diameters in the native forest. In addition, some species colonized twigs of similar sizes in different vegetation habitats, suggesting possible selection by ants.
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