Сибирский федеральный университет

Тип публикации: доклад, тезисы доклада, статья из сборника материалов конференций

Конференция: 6th International Field Symposium on West Siberian Peatlands and Carbon Cycle: Past and Present

Год издания: 2022

Идентификатор DOI: 10.1088/1755-1315/1093/1/012007

Аннотация: The peatlands in the northern hemisphere accumulated substantially more atmospheric carbon (C) during the Holocene than other terrestrial ecosystems. In this study we applied a multi-proxy record to distinguish variations in dynamics of two peatlands in the boreal belt (raised bog) and the forest-tundra ecotone (palsa mire) in Central Siberia. Carbon and nitrogen content in peatland soils and their stable isotope composition (δ13C and δ15N) were used to trace likely changes of hydrothermal regimes, vegetation shifts and diagenetic alteration of accumulated peat. Several inter-related allogenic and autogenic forcings have influenced the changes in macroelement content and stable isotope composition of peat with depth. In particular, there were climate-induced and succession-driven vegetation community shifts in domination of plants characterized by specific nutrient requirements, nutrient stoichiometry and fractionation of stable isotope values. The climate and permafrost-mediated processes like hummock uplift affected 13C uptake by Sphagnum mosses in wet and dry periods and changing hydrothermal conditions in peat profiles resulted in perturbations of the nitrogen cycle inducing N loss and enrichment 15N abundance, as well as enhanced decomposition was responsible for enrichment of organic matter in the heavier isotopes. These findings confirm the hypothesis that combined use of elemental and stable isotope composition provide meaningful insights in tracing the hydrothermal conditions and the functional state of peatbogs for paleoecological and paleoclimate reconstructions. © 2022 Institute of Physics Publishing. All rights reserved.

Журнал: IOP Conference Series: Earth and Environmental Science

Выпуск журнала: Vol. 1093, Is. 1

Номера страниц: 12007

ISSN журнала: 17551307

Издатель: Institute of Physics

• Prokushkin A.S. (V N Sukachev Institute of Forest SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS, Akademgorodok 50/28, Krasnoyarsk, 660036, Russian Federation, Siberian Federal University, Svobodny pr 79, Krasnoyarsk, 660041, Russian Federation)
• Novenko E.Yu. (Moscow State University, Leninskie gory 1, Moscow, 1119991, Russian Federation, Institute of geography RAS, Staromonetniy per 29/4, Moscow, 119017, Russian Federation)
• Kupryanov D.A. (Moscow State University, Leninskie gory 1, Moscow, 1119991, Russian Federation)
• Karpenko L.V. (V N Sukachev Institute of Forest SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS, Akademgorodok 50/28, Krasnoyarsk, 660036, Russian Federation)
• Mazei N.G. (Moscow State University, Leninskie gory 1, Moscow, 1119991, Russian Federation)
• Serikov S.I. (Igarka Geocryology Laboratory, Melnikov Institute of Permafrost SB RAS, Igarka, Russian Federation)

• Scopus