Methodological aspects of indicator values use in biodiversity analysis
A. A. ZVEREV1,2
1National Research Tomsk State University, Tomsk,Russia
2Central Siberian Botanical Garden of SB RAS, Novosibirsk, Russia
Keywords: фитоиндикационный анализ, биоразнообразие, экологические шкалы, система IBIS, взвешенное усреднение, индекс экологического согласия, indicator value analysis, biodiversity, indicator values, IBIS information system, weighted averaging, environmental consensus index
Abstract
Indicator values are becoming an increasingly popular tool in basic and applied botanical research: about 55 author’s phytoindication systems are known, including about 200 optimal and range scales for various environmental factors. This paper describes seven methods for calculating the phytoindication optimum of taxonomical list: structural methods and averaging methods with weighting by indicators of taxon’s participation (cover, frequency, activity) and the degree of ecological tolerance amplitude width. Optimum and interval indices of ecological consensus are proposed for a quantitative assessment of the level of ecological homogeneity of plant communities and floras. A critical comparison and assessment of the distinguishing ability of the described methods of environmental calculation and consensus indices was carried out in the environmental analysis module of the IBIS 7.2 botanical information system using vegetation data from Bashkiria and the Southern Urals at the level of phytocoenoses assigned to 4 communities and their coenofloras. The possible directions of further use of the results of indicator value analysis in phytocoenology and floristics are described.
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