Comparative analysis of results of processing the phytoplankton samples collected during Joint Danube Delta Survey (JDDS)
Journal Title: Scientific Annals of the Danube Delta Institute - Year 2014, Vol 20, Issue
Abstract
The paper includes information on the comparative analysis of the results of processing the same phytoplankton samples by specialists from Moldova, Romania and Ukraine. Samples were collected in 16 stations of different parts of the Danube Delta, which included lakes, natural branches (arms) and artificial channels. The field-survey was carried out between 27 September and 4 October 2011. Quantitative results of investigations were used for establishing the water quality (saprobic index). Totally there have been registered 226 species from 7 Orders. Only 14 species (6%) was identified by experts of all three countries. Lowest number of species was found in samples from Kilia and Tulcea arms, maximum number of species was found in samples from Lebedei Lake (Romania). Highest concentration of phytoplankton was found in Izak and Lebedei Lakes (Romania), minimal biomass was registered in Kilia arm (branch of Danube River) near Reni and Bystroe arm. Distribution of chlorophyll-a confirmed peculiarity of biomass distribution. Most stations have mesotrophic and eutrophic levels. Materials presented by experts did not enable us to prepare more detailed analysis of the obtained results. However general peculiarity of phytoplankton distribution and water quality were determined at the same time. Maximal quantitative development of phytoplankton was registered in lakes as compared to the highly dynamic branches of the Danube River. High biomass of phytoplankton is the indicator of the bad ecological conditions of aquatic ecosystems. Our advise is to repeat the joint researches in order to provide better laboratory reproducibility and intercalibration of biological monitoring of phytoplankton.
Authors and Affiliations
ALEXANDROV Borys
Keywords
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