Comparison of seasonal accumulation by mountain stream algae Hydrurus foetidus and Oscillatoria sp.
Abstract
In the process of biomonitoring, it is crucial to be aware of how species behave and how their metabolic needs influence element accumulation. In this study, we monitored two mountain stream species, Hydrurus foetidus and Oscillatoria sp. to determine their individual seasonal bio-accumulative abilities and their individual seasonal metabolic traits. Research was carried out at three sites in the foothills of the High Tatras between 2020 and 2023. Samples were collected at monthly intervals and subsequently processed with a fluorescence spectrophotometer. Seasonal changes were largely influenced by the metabolic needs of algae and cyanobacteria. For Oscillatoria sp., an increase in S and K was observed during summer, when they reach their metabolic maximum. The metabolic maximum of H. foetidus was determined to occur in autumn, based on increased concentration of Cl and Cr. Concentration of Ca and Sr present in Oscillatoria sp. exhibited a seasonally dependent pattern of accumulation of these elements during the colder months. The lowest concentrations were found during summer.
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