000			03225nab a2200361 c 4500
001			koha000996634
005			20230214171517.0
007			cr |
008			230210|2022 ne s a eng d
024	7		_a10.1016/j.scitotenv.2022.158701 _2doi
035			_akoha000996634
040			_aRU-ToGU _brus _cRU-ToGU
245	1	0	_aExperimental assessment of tundra fire impact on element export and storage in permafrost peatlands _cD. M. Kuzmina, A. G. Lim, S. V. Loiko, O. S. Pokrovsky
336			_aТекст
337			_aэлектронный
504			_aБиблиогр.: с. 12-13
520	3		_aExtensive studies have been performed on wildfire impact on terrestrial and aquatic ecosystems in the taiga biome, however consequences of wildfires in the tundra biome remain poorly understood. In such a biome, permafrost peatlands occupy a sizable territory in the Northern Hemisphere and present an extensive and highly vulnerable storage of organic carbon. Here we used an experimental approach to model the impact of ash produced from burning of main tundra organic constituents (i.e., moss, lichen and peat) on surrounding aquatic ecosystems. We studied the chemical composition of aqueous leachates produced during short-term (1 week) interaction of ash with distilled water and organic-rich lake water at 5 gsolid L−1 and 20 °C. The addition of ash enriched the fluid phase in major cations (i.e., Na, Ca, Mg), macro- (i.e., P, K, Si) and micronutrients (i.e., Mn, Fe, Co, Ni, Zn, Mo). This enrichment occurred over <2 days of experiment. Among 3 studied substrates, moss ash released the largest amount of macro- and microcomponents into the aqueous solution. To place the obtained results in the environmental context of a peatbog watershed, we assume a fire return interval of 56 years and that the entire 0–10 cm of upper peat is subjected to fire impact. These mass balance calculations demonstrated that maximal possible delivery of elements from ash after soil burning to the hydrological network is negligibly small (<1–2 %) compared to the annual riverine export flux and element storage in thermokarst lakes. As such, even a 5–10 fold increase in tundra wildfire frequency may not sizably modify nutrient and metal fluxes and pools in the surrounding aquatic ecosystems. This result requires revisiting the current paradigm on the importance of wildfire impact on permafrost peatlands and calls a need for experimental work on other ecosystem compartments (litter, shrubs, frozen peat) which are subjected to fire events.
653			_aмхи
653			_aлишайники
653			_aторф
653			_aтундровые пожары
653			_aмноголетнемерзлые торфяники
655		4	_aстатьи в журналах _9876418
700	1		_aKuzmina, Daria M. _9102288
700	1		_aLim, Artem G. _9102287
700	1		_aLoiko, Sergey V. _9102606
700	1		_aPokrovsky, Oleg S. _992087
773	0		_tScience of the total environment _d2022 _gVol. 853. P. 158701 (1-13) _x0048-9697
852	4		_aRU-ToGU
856	4		_uhttp://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000996634
908			_aстатья
999			_c996634