Holocene dynamics of vegetation and ecological conditions in the southern Yamal Peninsula according to the results of comprehensive analysis of a relict peat bog deposit

Панова, Н. К.; Трофимова, С. С.; Антипина, Т. Г.; Zinoviev, E. V.; Gilev, A. V.; Erokhin, N. G.

doi:10.1134/s1067413610010042

Cited by 21 publications

(9 citation statements)

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“…Some pollen deposition corresponding to this time period was found in the north close to the Lena River delta, but it could be the result of re-deposition of older pollen from the early Pleistocene or an occasional long-distance pollen dispersion. The same trend was observed in the south of the Yamal Peninsula and north of West Siberia where fir pollen was continuously present in the peat deposits beginning from 8 kya and disappeared after kya (Panova et al 2010). It is interesting to note that similar dynamics of fir was observed in the mountains of southwestern Mongolia, about km beyond the southern limit of the present range, where, according to radiocarbon dating of fir macrofossils (wood) in the Holocene peat deposits, fir was present in the middle Holocene and disappeared approximately after 3.5 kya (Dorofeyuk and Tarasov 2000).…”

Section: Larix Species During the Lgmsupporting

confidence: 75%

Mitochondrial DNA in Siberian conifers indicates multiple postglacial colonization centers

et al. 2019

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The geographic variation of the mitochondrial DNA in Siberian fir (Abies sibirica Ledeb.) was studied using the newly developed markers and compared with the phylogeographic pattern of another previously studied Siberian conifer, Siberian larch (Larix sibirica Ledeb.). Similar to Siberian larch, the distribution of mtDNA haplotypes in Siberian fir revealed clear differentiation among distinct geographic regions of southern Siberia and the Urals, likely indicating postglacial recolonization from several sources. The northern part of the range of both species was genetically homogeneous, which is probably due to its recent colonization from one of the glacial refugia. This conclusion is in agreement with published pollen and macrofossil data in Siberian fir and with the reconstruction of environmental niches indicating a dramatic reduction of the range and a likely survival of fir in certain southern areas during the Last Glacial Maximum (LGM), 21 thousand years ago. Although the modeling of the Siberian larch ecological niche reconstructed a shift of the range to the south at that period, the paleontological data indicated the presence of this species in most areas of the current range during LGM, which corresponds to the results of a previous historical demographic study suggesting that the population expansion preceding the LGM.

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Section: Larix Species During the Lgmsupporting

confidence: 75%

Mitochondrial DNA in Siberian conifers indicates multiple postglacial colonization centers

et al. 2019

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“…Based on literary sources [46][47][48][49][50], as well as our own data, the history of the development of raised-mound bogs of the northern taiga can be presented as follows: In the Subboreal and Atlantic periods, there was active peat accumulation. The initial surfaces of these Atlantic bogs were characterized by a relatively weak microrelief.…”

Section: Features Of Key Site Bogs and Soil Identificationmentioning

confidence: 99%

Microtopography Controls of Carbon and Related Elements Distribution in the West Siberian Frozen Bogs

et al. 2019

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The West Siberian Plain stands out among other boreal plains by phenomenal bogging, which has both global and regional significance. The polygonal bogs, frozen raised-mound bogs, and ombrotrophic ridge-hollow raised bogs are the most extensive bog types in the study area. These bogs commonly show highly diverse surface patterns consisting of mounds, polygons, ridges, hollows, and fens that correspond to the microtopes. Here we investigated how the microtopographic features of the landscape affect the thermal and hydrologic conditions of the soil as well as the nutrient availability and consequently, the dynamics of carbon and related elements. The effect of the surface heterogeneity on the temperature regimes and depths of permafrost is most significant. All of these factors together are reflected, through the feedback system, by a number of hydrochemical parameters of bog waters, such as dissolved organic and inorganic carbon (DOC, DIC), specific conductivity (Cond), SO42–, Cl–, P, Sr, Al, Ti, Cu, V, B, Cs, Cd, Rb, As, U, and rare earth elements (REEs). Among the studied parameters, DOC, SO42, Al, V, and Mn differ most significantly between the convex and concave microforms. The DOC content in bog water is significantly affected by the water residence time, which is significantly longer in soils of mound/polygons than fens. Plants biomass is higher on the mounds which also have some effect that, due to leaching, should lead to more carbon entering into the water of the mounds. It is also shown that atmospheric-dust particles have a noticeable effect on the hydrochemical parameters of bog waters, especially on mounds. The ongoing climate warming will lead to an increase in the fens area and to a decrease in the content of DOC and many elements in bog waters.

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“…Because of its strong bioamplification in Arctic marine biota (Morel et al, 1998) and exposure to native Arctic populations (AMAP, 2011), there is a strong interest in understanding Hg biogeochemistry in Arctic environments (Outridge et al, 2008;Steffen et al, 2008;Stern et al, 2012). Recent advances in quantifying Arctic Hg cycling show that Arctic Hg II wet deposition is generally low (Pearson et al, 2019) and that the vegetation Hg pump drives yearlong net gaseous Hg 0 (and CO 2 ) deposition via foliar uptake to Arctic vegetation and litterfall to soils (Obrist et al, 2017;Jiskra et al, 2018Jiskra et al, , 2019. Soil core analyses in Alaska indicate that large amounts of carbon and Hg have accumulated since the last glacial maximum (Olson et al, 2018;Schuster et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

A revised pan-Arctic permafrost soil Hg pool based on Western Siberian peat Hg and carbon observations

et al. 2020

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Abstract. Natural and anthropogenic mercury (Hg) emissions are sequestered in terrestrial soils over short, annual to long, millennial timescales before Hg mobilization and run-off impact wetland and coastal ocean ecosystems. Recent studies have used Hg-to-carbon (C) ratios (RHgC's) measured in Alaskan permafrost mineral and peat soils together with a northern circumpolar permafrost soil carbon inventory to estimate that these soils contain large amounts of Hg (between 184 and 755 Gg) in the upper 1 m. However, measurements of RHgC on Siberian permafrost peatlands are largely missing, leaving the size of the estimated northern soil Hg budget and its fate under Arctic warming scenarios uncertain. Here we present Hg and carbon data for six peat cores down to mineral horizons at 1.5–4 m depth, across a 1700 km latitudinal (56 to 67∘ N) permafrost gradient in the Western Siberian Lowland (WSL). Mercury concentrations increase from south to north in all soil horizons, reflecting a higher stability of sequestered Hg with respect to re-emission. The RHgC in the WSL peat horizons decreases with depth, from 0.38 Gg Pg−1 in the active layer to 0.23 Gg Pg−1 in continuously frozen peat of the WSL. We estimate the Hg pool (0–1 m) in the permafrost-affected part of the WSL peatlands to be 9.3±2.7 Gg. We review and estimate pan-Arctic organic and mineral soil RHgC to be 0.19 and 0.63 Gg Pg−1, respectively, and use a soil carbon budget to revise the pan-Arctic permafrost soil Hg pool to be 72 Gg (39–91 Gg; interquartile range, IQR) in the upper 30 cm, 240 Gg (110–336 Gg) in the upper 1 m, and 597 Gg (384–750 Gg) in the upper 3 m. Using the same RHgC approach, we revise the upper 30 cm of the global soil Hg pool to contain 1086 Gg of Hg (852–1265 Gg, IQR), of which 7 % (72 Gg) resides in northern permafrost soils. Additional soil and river studies in eastern and northern Siberia are needed to lower the uncertainty on these estimates and assess the timing of Hg release to the atmosphere and rivers.

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Holocene dynamics of vegetation and ecological conditions in the southern Yamal Peninsula according to the results of comprehensive analysis of a relict peat bog deposit

Cited by 21 publications

References 1 publication

Mitochondrial DNA in Siberian conifers indicates multiple postglacial colonization centers

Mitochondrial DNA in Siberian conifers indicates multiple postglacial colonization centers

Microtopography Controls of Carbon and Related Elements Distribution in the West Siberian Frozen Bogs

A revised pan-Arctic permafrost soil Hg pool based on Western Siberian peat Hg and carbon observations

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