Parcs

ID	TITEL	DATENTYP	AUTOR	JAHR
10364	Monitoring totholzreicher Waldflächen im Nationalpark Gesäuse	Project	Fachbereich Naturschutz und Naturraum	2004

Bemerkungen/Beschreibung

Joannea Zoologie 22

Abstract. The second contribution on species diversity and ecology of the Flat Bug (Heteroptera: Aradidae) community of the Gesäuse National Park (Austria, Styria) expands the dataset to a total of 89 standardised sampled plots. In 2021, 50 plots were investigated. Ten of the eleven species known from the protected area were detected: Aneurus avenius (DUFOUR, 1833), Aradus betulae (LINNAEUS, 1758), A. betulinus FALLÉN, 1807, A. cinnamomeus PANZER, 1806, A. conspicuus HERRICH-SCHAEFFER, 1835, A. corticalis (LINNAEUS, 1758), Aradus depressus depressus (FABRICIUS, 1794), A. erosus FALLÉN, 1807, A. pictellus KERZHNER, 1972 und A. versicolor HERRICH-SCHAEFFER, 1835. Including the data collected during the first standardized investigation in 2017, the distribution and ecological preferences of Aradidae feeding on wood-decaying fungi are presented and discussed. We confirm that several species of Aradidae occur only in forest stands of advanced age with associated deadwood qualities and quantities. Decisive is the presence of dead wood in larger dimensions ( 30 cm diameter) and in advanced decay phases. As character and target species of the naturally developing red beech forests and beech-dominated spruce-fir-beech forests in the Gesäuse, Aradus betulae is confirmed for deciduous forests with a high habitat tradition and large, standing and semi-shady to sunny deadwood and A. conspicuus for more shady, deadwood-rich red beech forests, supplemented by A. versicolor for lower, warm and sunny locations. Aradus pictellus is confirmed as a character and target species for coniferous forest stands characterized by the spruce and subject to natural succession with a preference for larger dimensioned, standing dead wood. In addition, Aradus corticalis and A. betulinus are suitable, both of which colonize also smaller sized wood to a lesser extent. Although recently burned areas were specifically included in the investigation, Aradus lugubris FALLÉN, 1807, which was historically reported from the Gesäuse, could not be detected. Notably, the detection of imagines and subadult larvae of A. betulinus and A. erosus on a stand burned in the previous season shows that these species are able to use freshly burned dead wood for reproduction. The extent to which the fire had an attractive effect on the colonisation remains open and will be the subject of further research. With the studies conducted so far, a database is available that will allow future statements on the state of natural forest development in the protected area based on bark beetles and also allow large scale comparisons of the state and dynamics of forest development in forest areas dominated by red beech and spruce.

Eintrag Nr. 54779

Zweiter Beitrag zur Kenntnis der Rindenwanzen (Insecta: Heteroptera: Aradidae) als Indikatoren natürlicher Waldentwicklung im Nationalpark Gesäuse (Österreich, Steiermark)