Application of some ecological indices for characterization of two types of floodplain forest in the inundation zone of the Danube
1995
Uhercikova, E. (Slovenska Akademia Vied, Bratislava (Slovakia). Ustav Zoologie)
The floodplain forests on two model areas on the Danube river sides were studied with a view to their present state, species richness, structure, dynamics, and ecological conditions. To identify the deciding environmental gradient the data from the parallel phytocoenological and pedological observations were subjected to the canonical correspondence analysis carried out by the program Conaco. The forest stands were differentiated according to the content of humus and granulometric composition of the soil. The analysis carried out by the program Fytan was one of the methods used for evaluation of ecological conditions by means of Ellenberg's indication values. Results confirm a relatively high habitat variability and, when compared with the literature data, also a lower humidity. The Simpson index of diversity lambda, Shannon-Weaver's index H, species richness index R1 (Margalef) and R2 (Menhinick) and indices of evenness E1-E3 were used for evaluation of species richness and diversity of the studied stands. The individual diversity indices fluctuated within the following limits: H': 2.53-2.66, lambda: 4.85-5.45, R1: 3.92-4.15, R2: 2.31-2.41
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