Carbon, nitrogen and their stable isotope (δ13C and δ15N) records in two peat deposits of Central Siberia: raised bog of middle taiga and palsa of forest-tundra ecotone

Prokushkin, A.S.; Novenko, E.Y.; Kupryanov, D.A.; Karpenko, L.V.; Mazei, N.G.; Serikov, S.I.

Авторы: Prokushkin A.S., Novenko E.Yu, Kupryanov D.A., Karpenko L.V., Mazei N.G., Serikov S.I.
Журнал: IOP Conference Series: Earth and Environmental Science
Номер: 1093
Год издания: 2022
Издательство: IOP Publishing
Местоположение издательства: [Bristol, UK], England
Номер статьи: 012007
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. Carbonand 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 diageneticalteration of accumulated peat. Several inter-related allogenic and autogenic forcings haveinfluenced the changes in macroelement content and stable isotope composition of peat withdepth. In particular, there were climate-induced and succession-driven vegetation communityshifts in domination of plants characterized by specific nutrient requirements, nutrientstoichiometry and fractionation of stable isotope values. The climate and permafrost-mediatedprocesses like hummock uplift affected 13C uptake by Sphagnum mosses in wet and dry periodsand changing hydrothermal conditions in peat profiles resulted in perturbations of the nitrogencycle inducing N loss and enrichment 15N abundance, as well as enhanced decomposition wasresponsible for enrichment of organic matter in the heavier isotopes. These findings confirmthe hypothesis that combined use of elemental and stable isotope composition providemeaningful insights in tracing the hydrothermal conditions and the functional state of peatbogsfor paleoecological and paleoclimate reconstructions.
Добавил в систему: Новенко Елена Юрьевна

	ИСТИНА	Войти в систему Регистрация
	ФНКЦ РР
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ФНКЦ РР

Carbon, nitrogen and their stable isotope (δ13C and δ15N) records in two peat deposits of Central Siberia: raised bog of middle taiga and palsa of forest-tundra ecotoneстатья

Прикрепленные файлы