Dr. Fűköh Levente szerk.: Malakológiai Tájékoztató 15. (Eger, 1986.)

P. SÓLYMOS.: Ecological and biogeographical investigation of the recent mollusc fauna of Szársomlyó (S Hungary), southern side

The selected malacological material was identified following Kerney et al. (1983) and Soós (1943). The record was classified according to the recent geographical distribution of the species, following Kerney et al. (1983). The multivariate statistical procedures were carried out using Matusita quantitative distances, Ward-Orlóci fusion method (MISSQ) and hierarchical cluster analysis (Tóthmérész, B. 1993). Results Ecological analyses The distribution of mollusc species was investigated on the S side of Szársomlyó. The relative frequency of the species were examined on the basis of totalized data of 4 samples per each areas. According to these data (Table 1) the following habitat pattern types or ecological groups can be separated: open, transitional, closed and the transitions of these goups like open-transitional and transitional-closed (Table 2). These groups are equvivalent of the vegetational covering. Table 1 Number of individuals on the basis of totalised data of 4 samples per each areas. Legend: tom=collected with thin-out method. Species Areas Sum total Species 1 2 3 4 5 6 Sum total Cochlicopa lubricella 4 53 57 Truncatellina cylindrica 70 96 217 88 198 84 753 Truncatellina callicratis 11 3 114 146 675 216 1165 Truncatellina sp. indet. 101 56 411 188 598 207 1561 Granaria frumentwn 288 1983 299 168 519 403 3660 Chondrina clienta 11 67 51 3 132 Pupilla triplicata 357 80 437 Vallonia costata 348 209 557 Vallonia pulchella 3 10 104 55 172 Zebrina detrita 159 274 681 397 32 84 1627 Vitrina pellucida 21 15 14 50 Oxychilus inopinatus 6 3 9 8 4 5 35 Euconulus fulvus 44 10 66 120 Cochlodina laminata torn torn Laciniaria plicata 17 219 169 107 4 516 Helicella obvia 204 421 31 26 7 136 825 Euomphalia strigella 2 6 8 Helix pomatia torn 3 torn 3 Total of individuals 842 2874 2048 1291 3084 1539 11678