Bioaccumulation of Microelements by Higher Aquatic Vegetation of Some Bays of the Ivankovo Reservoir

Grishantseva, E.S.; Fedorova, L.P.

Авторы: Grishantseva E.S., Fedorova L.P.
Журнал: Water Resources
Том: 52
Номер: 3
Год издания: 2025
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 445
Последняя страница: 459
DOI: 10.1134/s0097807825700034
Аннотация: The paper presents estimates of the volumes of biological accumulation of microelements (V, Pb,Cr, Co, Mo, Cu, Zn, Ni, Fe, Sr, and Mn) in eight species and rare earth elements (REE) (La, Ce, Pr, Nd,Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) in two species of higher aquatic and coastal-aquatic plants of three overgrown bays of the near-dam part of the Ivankovo Reservoir—Novoselskii, Fedorovskii, and Korovinskii. The floristic composition of plant communities of the bays was studied, the phytomasses of dominant associations of overgrown areas, and the production and areas occupied by higher aquatic vegetation were determined. Data for 1977 were compared with data for 2005 to show that there was a significant increase in the total annual production due to the growth of production of two ecological groups of macrophytes of the Ivankovo Reservoir—air-water (helophytes) and free-floating and rooting hydrophytes with a change in edificator species and an increase in the leading role of air-water (helophyte) vegetation species in the formation of overgrowing zones. In the period from 1990 to 2005 there was a stabilization of the overgrowing process and the productivity of all ecological and biological groups of vegetation remained at the same level. In total, in Novoselskii, Fedorovskii and Korovinskii bays during the period of maximum development (July–August), 4657.8 kg heavy metals accumulate in the dry biomass of macrophytes, of which 2.58 V, 1.98 Pb, 9.75 Cr, 0.78 Co, 0.82 Mo, 16.76 Cu, 45 Zn, 6.1 Ni, 1977 Fe, 171 Sr, and 2426 kg Mn. Rare earth elements are bound in dry biomass of Glycerieta maximae and Potameta perfoliati of three bays in the amount of 0.33kg. The largest mass of heavy metals is accumulated by vegetation of Korovinskii and Fedorovskii bays. In Korovinskii Bay, where the share of submerged rooting species in the total phytomass increases significantly, the highest values of bioaccumulation of heavy metals and rare earth elements were obtained. The main accumulator species are Stratioteta aloidis, Glycerieta maximae, and Potameta lucentis. It is shown that the process of bay overgrowing, accompanied by a change in plant communities, an ever-greater areal dominance, and an increase in the annual production of air-water species, contributes to the growth of biological accumulation of heavy metals.
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Bioaccumulation of Microelements by Higher Aquatic Vegetation of Some Bays of the Ivankovo Reservoirстатья

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