Ábrahám Levente (szerk.): Válogatott tanulmányok III. - Natura Somogyiensis 12. (Kaposvár, 2008)

Salamon-Albert Éva-Horváth Ferenc: Vegetation of Külső-Somogy in Hungary II.

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* . 1 ML ' ,|ü /Ml, J i TT A group B group lj D group QA+OB ML ' ,|ü A group B group lj D group QA+OB wet grasslands 10 tons 20 30 40 Fig. 4: Territorial extension (circle diameter) and proportion (circle segment) of main associated habitat groups of wet grasslands in Külső-Somogy large ocurrence and percentage of habitat patches have marshes (1030 cases, 34.4%) with eu- and mesotrophic reed and Typha beds which have the greatest occurrence number and proportion (Bla, 598 cases, 20%). Case statistics of D, E and H habitat groups are similar to each other in respects for relative occurrence and average case per quadrat (D group: 265 cases=8.9%, E group: 165 case=5.5%, H group: 250 cases=8.4%). Occurrence and number of average case of euhydrophyte habitats are low (A group: 48 cases=1.6%), by characteristics of flushes, transition mires and raised bogs and non-ruderal pioneer habitats (C and I groups: 2-2 cases) are sporadic or not remarkable in the region. In the second series average number of patches per quadrat for valid stands could be compared among habitat types and groups. Among habitat groups O have the largest occurrence number per quadrat (O group: 41.2%, 8.3 case per quadrat), I habitat type have the lowest ones (12: 2 case per quadrat). In the order of habitat frequencies (case per valid quadrats) the most frequent habitat types are OC (12.5), Bla and OB (8.4), BA (8.1), D34 (5.45), El (5.1), H5a and H4 (4.8). Spatial patterns at landscape scale In order to display occurrence and spatial distribution of habitat types and habitat groups, thematic maps were constructed. These maps emphasize spatial variation of one or a small number of series of target attributes. In the first step quality and territorial extension of habitat types and groups were calculated on a previously standardized consensus scale (<2 ha, 2-15 ha, 15-200 ha, 200-500 ha, >500 ha). Data calculation was based on valid hexagons only, spatial habitat maps were displayed at quadrat level referred to a G IS database. According to the map of significant associated habitat groups were constructed which could visualize the variability of non-woody habitat types and groups classed among: 1) wet grasslands, 2) dry and semi-dry grasslands, 3) wastelands.