Parcs

ID	TITEL	DATENTYP	AUTOR	JAHR
27151	Grundlagenerhebungen zur Biodiversität im Nationalpark Gesäuse	Project	Fachbereich Naturschutz und Naturraum	2002

Bemerkungen/Beschreibung

Hoverfly assemblages in three different habitat types of the Gesäuse National Park  semi-natural beech-(fir)-spruce forests, former spruce plantations and avalanche corridors  were investigated. Three areas of each habitat type were sampled with the help of a butterfly net and coloured pan traps from May to August 2013. In total 102 species of Syrphidae with 1841 individuals were found, including the first record of Xanthogramma stackelbergi in Austria. Hoverfly assemblages exhibited distinct differences between habitats. Indicator species could be identified for each of them. Avalanche corridors offering high flower abundance exhibited the highest species richness. Most individuals, however, were recorded in the spruce plantations, which probably served as retreats from the heat on hot summer days. Differences in species richness were less pronounced between the two forest types. Surprisingly spruce plantations exhibited a relatively high species richness, which could partly be attributed to a higher flower abundance due to management procedures. Beech-(fir)-spruce forests exhibited the highest amount of variation in species richness and hoverfly abundance between sites, but contained most saproxylic species, which represent an important component of forest ecosystems. More species as well as more individuals were caught with the butterfly net than with pan traps at comparable effort. Species composition, however, differed between the two methods, indicating that several methods should be applied for a complete species inventory.

Eintrag Nr. 31067

Schwebfliegen-Gemeinschaften im Nationalpark Gesäuse (Österreich)