The influence of abiotic factors on suppliers of organic matter in the peloidogenesis process from Lake Techirghiol, Romania
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2012, Vol 5, Issue 2
Abstract
The purpose of the study was the determination of the current situation of the Techirghiol ecosystem which is unique in Romania because of its hypersaline character and because of the large productivity in the formation of the sapropelic mud with therapeutic properties. A number of 107 taxonomic units have been identified in the phytoplankton. Most of the algae species belong to the diatoms group, followed in descending order by representatives ofChlorophyceae, Dinophyceae, Euglenophyceae, Chrysophyceae, Cryptophyceae and Xantophyceae. The number of taxa identified in the phytoplankton varied inverse proportionally with the water mineralization degree, unlike the values of the phytoplanktonic biomass, that have risen along with the water salinity. The high concentrations of Cl-and SO42- ions have been associated with a diverse phytoplankton and superior values of the microalgae biomass only in the year 2007. The report of the Na+> Mg2+> Ca2+ cations, generally valid for any sampling point, has created optimal conditions for the development of the phytoplankton, and especially the calciphilic alga Cladophora crystallina (Roth) Kütz. The concentrations of the nitrogen compounds (N-NH4+, N-NO3-) have been sufficient for the insurance of the nutritional necessities of the phytoplankton, especially for the diatoms that have registered the highest diversity and the highest biomass along microalgae.
Authors and Affiliations
Liana Gheorghievici, Iulia Pompei, Gheorghe Gheorghievici, Iosif Tănase
Keywords
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