The use of phytoindication for studying the structure of forest ecosystems

The data on multivariate analysis of principal factors determining the mosaic horizontal structure of forest communities were interpreted using phytoindication of ecological factors. The association Querceta (roboris)-Aceroso (tatarici)-anthriscosum situated in the mineralized floodplain of the Samara River (a tributary of the Dnieper River) was analyzed. The results showed that the first principal component was determined by the marginal effects, the second one was related to the ruderal fragments, and the third one was formed by relatively undisturbed synusias with nemoral species. It was found that the marginal effect determined the mosaic structure of the whole community and correlated with many ecological factors.