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Raudina TV, Loiko SV, Lim A, Manasypov RM, Shirokova LS, Istigechev GI, Kuzmina DM, Kulizhsky SP, Vorobyev SN, Pokrovsky OS. Permafrost thaw and climate warming may decrease the CO 2, carbon, and metal concentration in peat soil waters of the Western Siberia Lowland. Sci Total Environ 2018; 634:1004-1023. [PMID: 29660859 DOI: 10.1016/j.scitotenv.2018.04.059] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 04/05/2018] [Accepted: 04/05/2018] [Indexed: 06/08/2023]
Abstract
Soil pore waters are a vital component of the ecosystem as they are efficient tracers of mineral weathering, plant litter leaching, and nutrient uptake by vegetation. In the permafrost environment, maximal hydraulic connectivity and element transport from soils to rivers and lakes occurs via supra-permafrost flow (i.e. water, gases, suspended matter, and solutes migration over the permafrost table). To assess possible consequences of permafrost thaw and climate warming on carbon and Green House gases (GHG) dynamics we used a "substituting space for time" approach in the largest frozen peatland of the world. We sampled stagnant supra-permafrost (active layer) waters in peat columns of western Siberia Lowland (WSL) across substantial gradients of climate (-4.0 to -9.1°C mean annual temperature, 360 to 600mm annual precipitation), active layer thickness (ALT) (>300 to 40cm), and permafrost coverage (sporadic, discontinuous and continuous). We analyzed CO2, CH4, dissolved carbon, and major and trace elements (TE) in 93 soil pit samples corresponding to several typical micro landscapes constituting the WSL territory (peat mounds, hollows, and permafrost subsidences and depressions). We expected a decrease in intensity of DOC and TE mobilization from soil and vegetation litter to the supra-permafrost water with increasing permafrost coverage, decreasing annual temperature and ALT along a latitudinal transect from 62.3°N to 67.4°N. However, a number of solutes (DOC, CO2, alkaline earth metals, Si, trivalent and tetravalent hydrolysates, and micronutrients (Mn, Co, Ni, Cu, V, Mo) exhibited a northward increasing trend with highest concentrations within the continuous permafrost zone. Within the "substituting space for time" climate change scenario and northward shift of the permafrost boundary, our results suggest that CO2, DOC, and many major and trace elements will decrease their concentration in soil supra-permafrost waters at the boundary between thaw and frozen layers. As a result, export of DOC and elements from peat soil to lakes and rivers of the WSL (and further to the Arctic Ocean) may decrease.
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Affiliation(s)
- T V Raudina
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina av, 36 Tomsk, Russia
| | - S V Loiko
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina av, 36 Tomsk, Russia
| | - A Lim
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina av, 36 Tomsk, Russia
| | - R M Manasypov
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina av, 36 Tomsk, Russia; N Laverov Federal Center for Integrated Arctic Research, Institute of Ecological Problems of the North, Russian Academy of Science, Arkhangelsk, Russia
| | - L S Shirokova
- N Laverov Federal Center for Integrated Arctic Research, Institute of Ecological Problems of the North, Russian Academy of Science, Arkhangelsk, Russia; Geoscience and Environment Toulouse (GET), UMR 5563 CNRS University of Toulouse, 14 Avenue Edouard Belin, 31400 Toulouse, France
| | - G I Istigechev
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina av, 36 Tomsk, Russia
| | - D M Kuzmina
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina av, 36 Tomsk, Russia
| | - S P Kulizhsky
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina av, 36 Tomsk, Russia
| | - S N Vorobyev
- BIO-GEO-CLIM Laboratory, Tomsk State University, Lenina av, 36 Tomsk, Russia
| | - O S Pokrovsky
- Geoscience and Environment Toulouse (GET), UMR 5563 CNRS University of Toulouse, 14 Avenue Edouard Belin, 31400 Toulouse, France,.
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Morgalev YN, Lushchaeva IV, Morgaleva TG, Kolesnichenko LG, Loiko SV, Krickov IV, Lim A, Raudina TV, Volkova II, Shirokova LS, Morgalev SY, Vorobyev SN, Kirpotin SN, Pokrovsky OS. Bacteria primarily metabolize at the active layer/permafrost border in the peat core from a permafrost region in western Siberia. Polar Biol 2017. [DOI: 10.1007/s00300-017-2088-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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