Section 39
Chapter 38,255

Flora, vegetation and zoological investigations grasshoppers, reptiles of semi-dry meadows at the southern Rim of the Bohemian Mass east of Linz Upper Austria Flora, Vegetation und zoologische Untersuchungen Heuschrecken und Reptilien der Halbtrockenrasen am Suedrand der Boehmischen Masse oestlich von Linz Oberoesterreich

Essl, F.; Weissmair, W.

Beitraege zur Naturkunde Oberoesterreichs 11: 267-320


Accession: 038254958

The vegetation types, the floristic composition and selected animal groups (grasshoppers, reptiles) of semi-dry meadows at the southern rim of the Bohemian Mass east of Linz were investigated. The investigation area is located in the transition zone of the Bohemian Mass and the Danube valley. Geologically, the area mainly consists of silicious rocks covered with loess sediments of the pleistocene. The vegetation of the semi-dry meadows was documented by 23 vegetation surveys. The dominant plant associations were the Ranunculi bulbosi-Arrhenatheretum on moderately fertilised sites and the Onobrychido viciifoliae-Brometum on unfertilised sites. Slightly eutrophicated and abandoned areas can be clearly distinguished from cut areas. Rarely found were another two associations, the Trifolio-Agrimonietum and the Saxifrago-Poetum. The vascular plant species of all investigated semi-dry meadows were documented by complete species lists. 350 vascular plant species have been found. The occurrence of rare or threatened species is discussed in detail with reference to the relevant literature. The high number of plant species of the Red Data Lists (61 species of the Red Data List of Austria respectively Upper Austria) emphasizes the high value for nature conservation of these small remnants of semi-dry meadows. A total of 24 grasshoper species were recorded. 14 of these species are on the preliminary Red List of Upper Austrias endangered species, and 4 species are on Austria's Red List. Very remarkable are the following species of semi-dry meadows: Phaneroptera falcata, Metrioptera bicolor, Platycleis albopunctata, Chorthippus moths and Oedipoda caerulescens. Noticeable is also the widespread occurring of Parapleurus alliaceus, a species of wet meadows. Most of the observations of reptiles were accidentally. Sand lizards (Lacerta agilis) were found in most of the 17 investigated semi-dry meadows. Grass snakes (Natrix natrix) and Slow worms (Anguis fragilis) were rare. The most important threats for the semi-dry meadows pose abandonment of land use and artificial and natural afforestation. Intensivation of land use (especially fertilisation) and - to a lesser degree - construction of buildings and infrastructure are important threats as well.

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