Environmental niches of species from genera Eumerus Meigen and Platycheirus Lepeletier & Serville (Diptera, Syrphidae) designated as important for conservation in Serbia

In Serbia according to the national legislation, 33 species of hoverflies (Diptera, Syrphidae) are declared as strictly protected and 44 species as protected. In addition, Vujić et al. (2016) defined Prime Hoverfly Areas (PHA) and suggested 168 species of hoverflies for protection and designated 91 endemic or endangered species, including 9 species of Eumerus Meigen, 1822 and 11 of Platycheirus Lepeletier & Serville, 1828. The aim of this study was to analyze the environmental niches of Eumerus and Platycheirus species recognized as important for conservation in Serbia. For species of genus Eumerus and Platycheirus, distributional pattern in relation to altitude, annual precipitation and annual mean temperature were established. In order to compare environmental niches of Eumerus and Platycheirus species, Principal components analysis (PCA) was carried out. Results of the analyses showed that Eumerus species have a narrower altitudinal range, with some species found only in the lowland region. They inhabit more arid habitats, and prefer areas with higher annual mean temperatures. In contrast, it was established that most Platycheirus species can be found at higher altitudes with colder climate and that they prefer more humid conditions. Principal Component A analysis indicated partial overlap of the environmental niches of these two genera, but Platycheirus species seemed to be better adapted to harsher conditions.