Diversity and dynamics of amphibians in floodplain ecosystems of the Samara river

Abstract

High emphasis is placed on amphibian importance as a buffer system,which has inhibiting effect on technogenic transformation ofbiogeocoenoses. Issues of the animals' use in biological restoration,ecological rehabilitation of technogenic landscapes and in bioindicationof environmental conditions are covered. Change in any component of theecosystem leads to changing of the whole ecosystem. Anuran amphibiansare extremely vulnerable to harmful effects of many factors of naturaland anthropogenic origin. That is why, the destruction of forests,draining of wetlands, global climate change, global and localenvironmental pollution lead to complete disappearance or drasticdecrease in numbers of many species of amphibians, reduction andfragmentation of their habitats, increased diversity and overallproportion of morphological anomalies in the natural populations of thisgroup of animals. Recent studies of morphological changes in amphibiansare increasingly being used to assess the state of the natural state oftheir populations and quality of their environment In the biogeocenoseswhich are in the conditions of transformation amphibians have a numberof advantages relative to their activity, the rate of reproduction, andeuribiont character. Practical recommendations on protection andenrichment of the regional herpetofauna are given. The impact of thenumber and species diversity of amphibians on forest ecosystems of thesteppe Dnieper in various conditions is assessed. Parametric entropyfactors, the coefficient of biodiversity helped to identify the dominantspecies of amphibians Taking into account the influence of predictors,there is the possibility to detennine the number and species diversityof amphibians in the conditions of floodplain lime-ash forest As aresult of recording, the following species were caught: Pelobates fuscus(Laurenti, 1768), Rana arvalis Nilsson, 1842, Bufo bufo (Linnaeus,1758), Bombina bombina (Linnaeus, 1758). In the number of amphibiansthere have been changes Invariant ratio of the communities is thecharacteristic feature of the dynamics of amphibians, and the order ofdominance General diversity state of metagroup is 3.76. Diversity at thesite level is 3.52, accordingly