Ábrahám Levente (szerk.): Válogatott tanulmányok VI. - Natura Somogyiensis 19. (Kaposvár, 2010)

SALAMON-ALBERT É., HORVÁTH F., & ORTMANN-AJKAI A.: Climatic conditions and habitats in Belső-Somogy, Külső-Somogy and Zselic as vegetation-based landscape regions II. Temperature and precipitation sensitivity of woodlands

Natura Somogyiensis 19 51-66 Kaposvár, 2011 Climatic conditions and habitats in Belső-Somogy, Külső-Somogy and Zselic as vegetation-based landscape regions IT. Temperature and precipitation sensitivity of woodlands 'ÉVA SALAMON-ALBERT*, 2ADRIENNE ORTMANN-AJKAI, 3FERENC HORVÁTH 'University of Pées, Biological Institute, Department of Systematic and Ecological Botany H-7624 Pécs, Ifjúság útja 6. *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., email: aadrienn@gamma.ttk.pte.hu institute of Ecology and Botany of the Hungarian Academy of Sciences H-2163 Vácrátót, Alkotmány utca 4., e-mail: horvfe@botanika.hu SALAMON-ALBERT, É., HORVÁTH, F., ORTMANN-AJKAI, A.: Climatic conditions and habitats in Belső-Somogy. Külső-Somogy and Zselic as vegetation-based landscape regions II. Temperature and precipitation sensitivity of woodlands. Abstract: In our study climatic sensitivity of significant woody habitats are discussed in the territory of vegetation based landscape regions of South Transdanubia, including Belső-Somogy, Külső-Somogy and Zselic. Selected bioclimatic variables are used to characterize regional and habitat climate surfaces and envelopes by habitat occurrence. Gaussian probability curves were fitted, using long term (1961-1990) data for yearly and quarterly temperature and precipitation variables, representing general and extreme climatic conditions. Studied woodlands are sufficiently integrated into the climate surface and envelopes of the region, according to multipeaks of bioclimatic indices. Among woody habitat types, riverine and swamp woodlands (J) turned to be the most climate sensitive habitats, due to their few peaks with extreme values by numerous bioclimatic indices, especially yearly and quarterly precipitation variables. Mesic deciduous woodlands (K) are no directly climate sensitive on temperature relations, but they are like on the short time quarterly precipitation. Peaks of dry closed deciduous woodlands (L) and other tree dominated habitats (R) are completely fitted to regional climate surfaces and envelopes, so they have no significant climate sensitivity by any analysed bioclimatic variable. Keywords: habitat distribution modelling (HDM), climate surface, climate envelope, MÉTA database, woodlands, landscape ecology Introduction Climate and its change effecting biodiversity is a hot topic of climatic and ecological research, using distribution models, niche theory models and bioclimatic envelope models for predicting distributions or occurrences of species or habitats (BOTKIN et al. 2007). Key role of climate as determinant of vegetation patterns was recognized already by the very first vegetation scientists, as Humboldt, Bonpland and de Candolle (GUISAN and ZIMMERMANN 2000). Climate-vegetation interactions were widely analysed under differ-