Abstract
The Brazilian Savanna is considered a global hotspot and habitat loss has posed a serious threat to insect fauna, including Hymenoptera parasitoids. We tested the effect of fragment size, seasonal abundance, and vegetation structure, on Hymenopteran community composition. This is the first study that describes the Hymenoptera community at the morphospecies level for the Brazilian Savanna. No relationship between community structure and fragment size was found. Instead, variation in individual abundance was higher with low rainfall and temperature. It was possible to identify two groups, with different compositions. One group was influenced by leaf-litter and the shrub layer, whilst the other had an affinity with vertical variables and the arboreal stratum. In the Brazilian Savanna, the Hymenopteran fauna is not well known and the effect of fragmentation and habitat structure are important factors for the structure and composition of the Hymenopteran community. Savanna, with its high biodiversity, confirms this biogeographical region as a hotspot for Hymenoptera. We can conclude from the results of this study that seasonality, spatial arrangement, and variations in the structural complexity of fragments affects the composition and distribution of Hymenoptera in the Brazilian Savanna biome.
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