BIOGEOCHEMICAL SPECIALIZATION OF MACROPHY TESAND THEIR ROLE AS A BIOFILTER IN THE SELENGA DELTA

This study aims to evaluate the biofiltration ability of higher aquatic vegetation of the Selenga delta as a barrier for heavy metals and metalloids (HMM) flows into the Lake Baikal. Main aquatic vegetation species have been collected from deltaic channels and inner lakes: Nuphar pumila, Potamogeton perfoliatus, P. pectinatus, P. natans, P. friesii, Butomus umbellatus, Myriophyllum spicatum, Ceratophyllum demersum, Phragmites australis . Analysis of the obtained data showed that regardless of the place of growth hydatophytes spiked water-milfoil ( M. spicatum ) and the fennel-leaved pondweed ( P. pectinatus ) most actively accumulate metals. Opposite tendencies were found for helophytes reed (Ph. australis) and flowering rush ( B. umbellatus ), which concentrate the least amount of elements. This supports previous findings that the ability to concentrate HMM increases in the series of sur face - floating - submerged plants. Regarding river water, the studied macrophyte species are enriched with Mn and Co, regarding suspended matter - Mo, Mn and B, regarding bottom sediments - Mn, Mo and As. We identified two associations of chemical elements: S-association with the predominant suspended form of migration (Be, V, Co, Ni, W, Pb, Bi, Mn, Fe and Al) and D-association with the predominant dissolved form of migration (B, U, Mo, Cr, Cu, Zn, As, Cd, Sn and Sb). Due to these associations three groups of macrophytes were distinguished - flowering rush and reed with a low HMM content; small yellow pond-lily and common floating pondweed with a moderate accumulation of S-association and weak accumulation of D-association elements; and clasping-leaved pondweed, fennel-leaved pondweed, and pondweed Friesii accumulating elements of both S and D groups. The results suggest that macrophytes retain more than 60% of the total Mn flux that came into the delta, more than 10% - W, As, and from 3 to 10% B, Fe, Co, Mo, Cd, V, Ni, Bi, Be, Cu, Zn, Cr, U, Al. The largest contribution is made by the group of hydatophytes (spiked water-milfoil and pondweed), which account for 74 to 96% of the total mass of substances accumulated by aquatic plants.

Авторы
Shinkareva G.L.1 , Lychagin M.Y.1 , Tarasov M.K.1 , Pietroń Jan2 , Chichaeva M.A. 3 , Chalov S.R.1
Издательство
Lomonosov Moscow State University
Номер выпуска
3
Язык
Английский
Страницы
240-263
Статус
Опубликовано
Том
12
Год
2019
Организации
  • 1 Lomonosov Moscow State University
  • 2 WSP Sverige AB
  • 3 Peoples Friendship University of Russia (RUDN University)
Ключевые слова
biogeochemistry; Deltaic environment; Heavy metals and metalloids in aquatic systems; macrophytes; hyperspectral images
Дата создания
02.11.2020
Дата изменения
02.11.2020
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/70809/
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