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Biogeochemistry of macrophytes, sediments and porewaters in thermokarst lakes of permafrost peatlands, western Siberia.
Manasypov, Rinat M; Pokrovsky, Oleg S; Shirokova, Liudmila S; Auda, Yves; Zinner, Nadezhda S; Vorobyev, Sergey N; Kirpotin, Sergey N.
Afiliación
  • Manasypov RM; BIO-GEO-CLIM Laboratory, Tomsk State University, 36 av. Lenina, 634050 Tomsk, Russia. Electronic address: rmmanassypov@gmail.com.
  • Pokrovsky OS; BIO-GEO-CLIM Laboratory, Tomsk State University, 36 av. Lenina, 634050 Tomsk, Russia; Federal Center for Integrated Arctic Research, Institute of Ecological Problem of the North, 23 Nab. Severnoi Dviny, 163000 Arkhangelsk, Russia; GET UMR 5563 CNRS University of Toulouse, 14 av. Edouard Belin, 31400
  • Shirokova LS; Federal Center for Integrated Arctic Research, Institute of Ecological Problem of the North, 23 Nab. Severnoi Dviny, 163000 Arkhangelsk, Russia; GET UMR 5563 CNRS University of Toulouse, 14 av. Edouard Belin, 31400 Toulouse, France.
  • Auda Y; GET UMR 5563 CNRS University of Toulouse, 14 av. Edouard Belin, 31400 Toulouse, France.
  • Zinner NS; Department of Agricultural Biology, Tomsk State University, 36 av. Lenina, 634050 Tomsk, Russia; Department of Pharmacy, Siberian State Medical University, 2 Moskovsky trakt, 634050 Tomsk, Russia.
  • Vorobyev SN; BIO-GEO-CLIM Laboratory, Tomsk State University, 36 av. Lenina, 634050 Tomsk, Russia.
  • Kirpotin SN; BIO-GEO-CLIM Laboratory, Tomsk State University, 36 av. Lenina, 634050 Tomsk, Russia.
Sci Total Environ ; 763: 144201, 2021 Apr 01.
Article en En | MEDLINE | ID: mdl-33385841
The chemical composition of thermokarst lake ecosystem components is a crucial indicator of current climate change and permafrost thaw. Despite high importance of macrophytes in shallow permafrost thaw lakes for control of major and trace nutrients in lake water, the trace element (TE) partitioning between macrophytes and lake water and sediments in the permafrost regions remains virtually unknown. Here we sampled dominant macrophytes in thermokarst lakes of discontinuous and continuous permafrost zones in the Western Siberia Lowland (WSL) and measured major and trace elements in plant biomass, lake water, lake sediments and sediment porewater. All six plant species (Hippuris vulgaris L., Glyceria maxima (Hartm.) Holmb., Comarum palustre L., Ranunculus spitzbergensis Hadac, Carex aquatilis Wahlenb s. str., Menyanthes trifoliata L.) sizably accumulated macronutrients (Na, Mg, Ca), micronutrients (B, Mo, Nu, Cu, Zn, Co) and toxicants (As, Cd). Accumulation of other trace elements, including rare earth elements (REE), in macrophytes relative to pore waters and sediments was highly variable among species. Using miltiparametric statistics, we described the behavior of ТЕ across two permafrost zones and identified several group of elements depending on their sources in the lake ecosystems and their affinity to sediments and macrophytes. Under future climate warming and shifting the permafrost border to the north, we anticipate an increasing uptake of heavy metals and lithogenic low mobile elements such as Ti, Al, Cr, As, Cu, Fe, Ni, Ga, Zr, and REEs by macrophytes in the discontinuous permafrost zone and Ba, Zn, Pb and Cd in the continuous permafrost zone. This may eventually diminish transport of metal micronutrients and geochemical tracers from soils to lakes and rivers and further to the Arctic Ocean.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Metales Pesados / Hielos Perennes Tipo de estudio: Prognostic_studies País/Región como asunto: Asia Idioma: En Revista: Sci Total Environ Año: 2021 Tipo del documento: Article Pais de publicación: Países Bajos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Metales Pesados / Hielos Perennes Tipo de estudio: Prognostic_studies País/Región como asunto: Asia Idioma: En Revista: Sci Total Environ Año: 2021 Tipo del documento: Article Pais de publicación: Países Bajos