Selenium bioaccumulation in eutrophic lake – Dąbie Małe Lake, Poland

Abstract

While the world literature presents many studies on the occurrence of selenium in aquatic ecosystems, the risks associated with overexposure of hydrobionts to this element and the consequences of its magnification in the food chain (areas rich in Se), there are few studies on Se concentration in Poland's water bodies and watercourses (Se deficient area). The objective of the study was to assess the Se bioaccumulation in Dąbie Małe Lake, based on Se concentration in the water, bottom sediments, and organs of Rutilus rutilus and Perca fluviatilis. The accumulation and biomagnification factor averaged 231 ± 69 and 1.2, respectively. Bioconcentration factor, calculated as Se in muscle divided by Se in water, ranged 35–104. Although Se concentrations in bottom sediments and fish were generally lower than the values reported in the literature, Se concentration in the water exceeded 2 µg/L, recommended value as a probable safe water concentration for wildlife.

Selenite-Catalyzed Reaction between Benzoquinone and Acetylacetone Deciphered the Enhanced Inhibition on Microcystis aeruginosa Growth

“…SeO 3 2– is more labile and toxic than SeO 4 2– . The bioconcentration factor of SeO 3 2– in algae was reported in the range of 220–3600. , Although low concentrations of SeO 3 2– could stimulate the growth of algae, SeO 3 2– of concentration levels of μM to mM could inhibit the growth of algae. , In shallow eutrophic lakes, inputs of nitrogen and phosphorus through agricultural practices and industrial discharges may often be accompanied by external Se loading. The contents of Se in cyanobacterial blooms might be significantly higher than that in unimpacted waters. , Therefore, it is of great importance to clarify the effects of Se on the interactions between quinone and AA.…”