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

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

habitat types KI a, RD, K2 and P2a have the greatest occurrence number per quadrat in the region (15,4; 15; 13,6; 11,6). Spatial patterns at landscape scale In order to display main features of habitat types and habitat groups (e.g. occurrence, spatial distribution) 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, spatial habitat maps were displayed at quadrat level referred to a GIS database. According to the map of significant associated habitat groups were constructed which could visualize the variability of woody habitat types and groups classed among: 1) riverine, swamp and mesic woodlands, 2) dry and rocky woodlands, 3) uncharacteristic woody habitats. In the first map the three main associated habitat groups are displayed in connection with managing and land-use types: the semi-natural woodlands and uncharacteristic plantations (Fig. 4). Distribution of regional woodland habitats is uneven, the majority of vegetation patches are found in central and western part of Külső-Somogy. Riverine, swamp and mesic woodlands are the dominating habitats all over the quadrats which have medium or large cover of woody habitats, especially along the Koppány stream. In the quadrats including small woody patches the proportion of uncharacteristic woody habitat types is the most important. Occurrence of dry and mesic woodlands is considerable in the central-northern and south-eastern parts of the region. By further detailed analysis of riverine, swamp and mesic woodlands the oak-hornbeam woodlands (Kla+K2 habitat types) have the largest proportion in this associated habitat group (Fig. 5). Great ratio of K2 is generally characteristic in woody-rich land Fig. 4. Territorial extension (circle diameter) and proportion (circle segment) of main associated habitat groups in Külső-Somogy. Related shrub habitat types are excluded