Isoecological curves on characterising the ecotypes central Mecsaek MTS of Hungary

Abstract

Ecological indicator values, widely used botany, are empricial scales worked out for the most important factors. Values of enviromental factors determine the position of the vegetation units in a multidimensional abstarct space. Their latest version in Hungary is the catergory system of Borhidi (1995), which is adjusted ti the European systems (e. g. Ellenberg et al. 1992). Indicator values or categories, respectively, can be found, according to European practice, in a relational computerised database (Horvath et al. 1995) which is accpeted as a standard for the botanists. An example of isoline analysis, completed using ecological indicator values of vegetation samples, is presented on a modell area in Mecsek Mts of South Hungary. It has varied vegetation with diverse kind of human interference near Pecs. From the existing indicator values applied here temperatur (TB), water demand (WB) of plants and soil reaction (RB). Each single isocurve was constructed from the similar indicator values on ...