Ábrahám Levente (szerk.): Válogatott tanulmányok V. - Natura Somogyiensis 17. (Kaposvár, 2010)

SALAMON-ALBERT, É., ORTMANN-AJKAI, A., HORVÁTH, F., & MORSCHHAUSER, T.: Klíma és élőhelytípusok Belső-Somogy, Külső-Somogy és Zselic vegetáció alapú tájegységeiben I. Klímafelszínek és az erdei élőhelyek éghajlati tartománya

Natura Somogyiensis 17 65-76 Kaposvár, 2010 Climatic conditions of semi-natural habitats in BelsőSomogy, Külső-Somogy and Zselic regions I. Climatic surface and climatic envelope of woodlands ÉVA SALAMONALBERT

1*, ADRIENNE ORTMANN-AJKAI

2, FERENC HORVÁTH

3, TAMÁS MORSCHHAUSER

1 University of Pécs, Biological Institute, Department of Systematic and Ecological Botany H-7624 Pécs, Ifjúság útja 6., Hungary, *e-mail: albert@gamma.ttk.pte.hu, morsi@gamma.ttk.pte.hu 2University of Pécs, Biological Institute, Department of Ecology and Hydrobiology H-7624 Pécs, Ifjúság útja 6., Hungary, email: aadrienn@gamma.ttk.pte.hu institute of Ecology and Botany of the Hungarian Academy of Sciences H-2163 Vácrátót, Alkotmány utca 4., Hungary, e-mail: horvfe@botanika.hu SALAMON-ALBERT, É., ORTMANN-AJKAI, A., HORVÁTH, F., MORSCHHAUSER, T.: Climatic conditions and habitats in Belső-Somogy, Külső-Somogy and Zselic as vegetation-based landscape regions I. Climatic surface and climatic envelope of woodlands. Abstract: In our study bioclimatic variables calculated from long-term temperature and precipitation data (1960-1990) were applied in order to define climatic surfaces and climatic envelope of significant woody habitat types in three vegetation-based hilly landscape of South Transdanubia (Belső-Somogy, Külső-Somogy, Zselic). Certain differencies can be observed in the climatic surface of the regions. Külső-Somogy is the most extreme region by all the bioclimatic indeces, Zselic is the most balanced by precipitation and Belső-Somogy is similar by the temperature indeces. Climatic envelopes of main woody habitat types (J - riverine and swamp woodlands, K - mesic deciduous woodlands, L - dry closed deciduous woodlands, R - other tree dominated habitats) are considerably overlapping by the selected bioclimatic variables. Precipitation must be a significant role in the existence of woody habitat types according to the landscape region. Values of temperature are valid in a narrower range without any differentiation by the habitats or landscapes. Keywords: climatic envelope, climatic surface, GIS database, MÉTA habitats, landscape ecology Introduction Bioclimatic indeces connected to vegetation data are widely used for interpretation of species or habitat distribution or suitability in vegetation science under past, current and future climate scenarios (HOSSELL et al. 2003, BEAUMONT et al. 2005, ATTORRE et al. 2007). They were derived from the monthly temperature and precipitation data in order to generate more biologically meaningful variables, representing annual trends, seasonality and extreme or limiting environmental factors (HUMANS et al. 2005). Climate has been shown to be a dominant element of the environment in determining vegetation distributions and classification for European scales in different vegetation types. It is important that we can confidently describe current habitat distribution according to cli-