Abstract
The aim of the Regional Vegetation Database of Kiskunsag (GIVD ID EU-HU-001) was to study the effect of different land-use on plant biodiversity. The Kiskunsag region is a highly heterogeneous cultural landscape in central Hungary, with unique natural values, high diversity of land-use, its own well-defined environmental problems, and ongoing socio-economic changes, thus being an ideal setting for conducting integrative socio-ecological research and setting up an LTSER platform. In the past few years, we expanded the KISKUN LTER program into a broad-scale research framework or LTSER program by (1) covering all major landuse/habitat types occurring in the region; (2) reaching regional representativity by having multiple sites. Within the 7,500 km2 study region, using a pre-defined algorithm we selected a network of 16 sites (5 x 5 km) that covers the regional variability in land-use pattern, naturalness, and soil. We sampled three replicate stands (if available) of all major habitat types (arable land and vineyards, oldfields, natural grasslands and woodlands, forest plantations) in all 16 sites between 2006 and 2008. In a total of 604 plots (20 x 20 m) we detected the plant species present and estimated their cover.
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