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Phytocenological approach in biomonitoring of the state of aquatic ecosystems in Ukrainian Polesie

100%

Fedonyuk T. P. , Fedoniuk R. H. , Zymaroieva A. A. , Pazych V. M. , Aristarkhova E. O.

Journal of Water and Land Development

2020

tom no. 44

65--74

The results of a research into the scale and consequences of the degradation of aquatic ecosystems in Ukrainian Polesie have been detected in article, and the areas of increased anthropogenic pressure have been identified which greatly affect the condition and number of aquatic macrophytes. The biodiversity of sites with different anthropogenic load was evaluated using the biodiversity criteria. In the research, the structural and functional features of macrophytic species diversity within Teteriv River ecological corridor as a typical river landscape of Ukrainian Polesie were determined and described, the floristic composition was determined. Within the ecological zones, the number of species and their projective coverage in areas with different anthropogenic pressures within Teteriv River ecological corridor were determined. The basic criteria for the implementation of deferred biomonitoring based on the analysis of the dynamics of the species composition of the phytocoenoses of Teteriv River ecological corridor on the indicators of ecological stability and plasticity using the species-specific criteria, are: Margalef species richness index, Sørensen–Dice index, Shannon diversity index, Simpson’s index, and Pielou’s evenness index. Based on the results, correlation dependencies have been constructed, which will allow to obtain data on the stability of the development of aquatic ecosystems according to the data of species surveys. Interconnections between biodiversity indicators and indicators of surface water quality within the Ukrainian Polesie were found; they are the fundamental component of a long-term monitoring of the stability in the development of aquatic phytocenoses.

Distribution and ecological growth conditions of Utricularia australis R. Br. in Ukraine

86%

Orlov O. O. , Fedoniuk T. P. , Iakushenko D. M. , Danylyk I. M. , Kish R. Y. , Zymaroieva A. A. , Khant G. А.

Journal of Water and Land Development

2021

tom no. 48

32--47

The study shows the biodiversity of Utricularia australis from western to northern regions of Ukraine. The environmental conditions of Ukraine are favourable for the spread and formation of phytocenosis involving U. australis, especially on thermoclimatic, cryothermal and continental scale. A broader range of the species’ relation to humidity has been recorded. The research outcome shows the existence of the species in conditions from shallow, parched reservoirs to deep water habitats which allows the species to withstand temporary drying of reservoirs in summer periods. The resilience of U. australis to some water quality parameters, including nitrogen, phosphorus, iron content, colour, pH and organic contamination was higher than in previous studies and Tsyganov’s ecological scales. Thus, due to its wide range of tolerance to the majority of environmental factors, U. australis tends to spread in contemporary climatic conditions in Ukraine. Considering that the species has category “vulnerable” in the country and is listed in the red data book of Ukraine, its conservation status is likely to be revised further.