ABSTRACT
Abstract The Parque Nacional Grande Sertão Veredas, northern Minas Gerais, is located in the Cerrado, a global hotspot, and the literature lacks information about its communities of social wasps, insects that perform numerous services for the functioning of ecosystems. Therefore, this study aimed to conduct an inventory of social wasps (Vespidae: Polistinae) in the Parque Nacional Grande Sertão Veredas, and compare its richness and composition with three other fully protected conservation units in northern Minas Gerais and Vale do Jequitinhonha, Minas Gerais. A total of 41 species of 14 genera of social wasps were recorded, including a new occurrence in the state: Mischocyttarus campestris Raw, 1985. The presence of distinct social wasp communities in the Cerrado and Caatinga conservation units analyzed in this study, reinforces and justifies the creation of these fully protected areas, which ensure the conservation of this biological heritage and the environmental services provided by these taxa, besides providing subsidies for the management and sustainable use of the natural resources of these conservation units.
Resumen O Parque Nacional Grande Sertão Veredas, norte de Minas Gerais, inserido no Cerrado, hotspot mundial, carece de informações sobre a comunidade de vespas sociais, insetos que desempenham inúmeros serviços para o funcionamento dos ecossistemas. Portanto, o objetivo deste estudo foi realizar um inventário de vespas sociais (Vespidae: Polistinae) no Parque Nacional Grande Sertão Veredas, além de comparar sua riqueza e composição com à de outras três Unidades de Conservação de proteção integral no Norte e no Vale do Jequitinhonha no estado de Minas Gerais. Foram registradas 41 espécies de 14 gêneros de vespas sociais, com um novo registro de ocorrência para o estado, Mischocyttarus campestris Raw, 1985. A presença de comunidades distintas de vespas sociais nas Unidades de Conservação no Cerrado e Caatinga, analisadas no presente estudo, reforça e justifica a criação dessas áreas de proteção integral, que assegura a conservação desse patrimônio biológico, bem como os serviços ambientais prestados por esses táxons, além de fornecer subsídios para o manejo e uso sustentável dos recursos naturais dessas Unidades de Conservação.
ABSTRACT
Abstract The social wasps have a remarkable system of organization in which chemical communication mediate different behavioral interactions. Among the compounds involved in this process, cuticular hydrocarbons are considered the main signals for nestmate recognition, caste differentiation, and fertility communication. The aims of this study were to describe the cuticular chemical compounds of the species Mischocyttarus consimilis, Mischocyttarus bertonii, and Mischocyttarus latior, and to test whether these chemical compounds could be used to evaluate differences and similarities between Mischocyttarus species, using gas chromatography coupled to mass spectrometry (GC-MS). Workers from these three species presented a variety of hydrocarbons ranging from C17 to C37, and among the compounds identified, the most representative were branched alkanes, linear alkanes and alkenes. The results revealed quantitative and qualitative differences among the hydrocarbon profiles, as confirmed by discriminant analysis. This study supports the hypothesis that cuticular chemical profiles can be used as parameters to identify interspecific and intercolony differences in Mischocyttarus, highlighting the importance of these compounds for differentiation of species and populations.