Janus Pannonius Múzeum Évkönyve 43 (1998)( Pécs, 1999)

Természettudományok - Nagy, Antal: Data on the Orthoptera fauna of the Villány Hills, South Hungary

42 A JANUS PANNONIUS MÚZEUM ÉVKÖNYVE 43 (1998) The annual mean temperature is 10.5 °C and the amount of precipitation runs to 670-690 mm per year with its two maximums because of the strong submediterranean effects on this region (MAROSI, SOMOGYI 1990). The hills are mainly built of Jurassic and Cretaceous limestone (Szársomlyó, Tenkes) and Triassic dolomite (Fekete Hill, Csukma), the hillfoots and plateaus are covered with loess. The first rate limestone is mined in several parts of the Hills (eg. the Szársomlyó, Csukma, Tenkes Hill), which endangers the conservation areas. The closed plant association of S slope of the Fekete Hill, Tenkes and Csukma is oak forest (Ото- Quercetum pubescentis). On the Fekete Hill shrubforest can also be found. The karstic shrubforest of the Szársomlyó (Inulo spiraeifoliae-Quercetum pubescentis) is well known (DÉNES 1994). These shrubs are often mixed with rocky grasslands (area 3,4, 9, 11,13). The open association is steppe grasslands (Cleistogeni-Festucetum rupicolae) (area 1, 5, 7) and rocky grasslands: Sedo sopianaefestucetum dalmaticae (area 2,6,12) and rocky grassland on dolomite (Chysopogono-Festucetum dalmaticae) with Mediterranean 32% Mediterranean 48% Fig. 2. Average (pies) and percentage deviation (vertical bars) of the faunal types. Deviation means the difference between the value of a given area and the overall average of the Hills (pie). Grey = 1997, black = 1998. The ratio is given in percentage (quantitative samples in 1997) and percentage of presence (quantitative samples in 1998).