Carbon dioxide fluxes in the ecosystem of meso-oligotrophic peatland during the transition period from autumn to winter

Mikhailov, O. A.; Загирова, С. В.; Miglovets, Mikhail; Wille, Christian

doi:10.1134/s1995425513020108

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…However, our findings differ systematically from the observations by other studies, i.e., 14 gC m −2 for a moist acidic tundra in Alaska (Oechel et al, ) and −19 gC m −2 for a polygonal tundra in northern Siberia (Kutzbach et al, ), which cover environmental conditions (e.g., mean annual air temperature or ecosystem type) similar to those at our site near Chersky. Following the growing season that typically features a pronounced CO 2 uptake (Euskirchen et al, ) peaking around July (Jammet et al, ), the fall is associated with major CO 2 losses (Kwon et al, ; Laurila et al, ; Mikhailov et al, ) that result in nonnegligible contributions of the fall season to the annual budget, which is in agreement with previous studies (Christiansen, Schmidt, & Michelsen, ; Kutzbach et al, ; Lüers et al, ; Oechel et al, ). Our findings confirm reports of cold season emissions contributing more than 50% of the annual budget (including spring; Kutzbach et al, ).…”

Section: Discussionsupporting

confidence: 86%

Long‐Term Drainage Reduces CO₂ Uptake and CH₄ Emissions in a Siberian Permafrost Ecosystem

Kittler

Heimann

Kolle

et al. 2017

Global Biogeochemical Cycles

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Permafrost landscapes in northern high latitudes with their massive organic carbon stocks are an important, poorly known, component of the global carbon cycle. However, in light of future Arctic warming, the sustainability of these carbon pools is uncertain. To a large part, this is due to a limited understanding of the carbon cycle processes because of sparse observations in Arctic permafrost ecosystems. Here we present an eddy covariance data set covering more than 3 years of continuous CO2 and CH4 flux observations within a moist tussock tundra ecosystem near Chersky in north‐eastern Siberia. Through parallel observations of a disturbed (drained) area and a control area nearby, we aim to evaluate the long‐term effects of a persistently lowered water table on the net vertical carbon exchange budgets and the dominating biogeochemical mechanisms. Persistently drier soils trigger systematic shifts in the tundra ecosystem carbon cycle patterns. Both, uptake rates of CO2 and emissions of CH4 decreased. Year‐round measurements emphasize the importance of the non‐growing season—in particular the “zero‐curtain” period in the fall—to the annual budget. Approximately 60% of the CO2 uptake in the growing season is lost during the cold seasons, while CH4 emissions during the non‐growing season account for 30% of the annual budget. Year‐to‐year variability in temperature conditions during the late growing season was identified as the primary control of the interannual variability observed in the CO2 and CH4 fluxes.

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Section: Discussionsupporting

confidence: 86%

Long‐Term Drainage Reduces CO₂ Uptake and CH₄ Emissions in a Siberian Permafrost Ecosystem

Kittler

Heimann

Kolle

et al. 2017

Global Biogeochemical Cycles

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“…The photosynthesis of peatland vegetation is greatly influenced by high-frequency variation in solar radiation [69] and by changes in the groundwater table [70,71]. Sphagnum mosses completely cover the surface of the Mukhrino peatland and provide an important input into the carbon cycle.…”

Section: Discussionmentioning

confidence: 99%

The Multiscale Monitoring of Peatland Ecosystem Carbon Cycling in the Middle Taiga Zone of Western Siberia: The Mukhrino Bog Case Study

Dyukarev¹,

Zarov²,

Alekseychik

et al. 2021

Land

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The peatlands of the West Siberian Lowlands, comprising the largest pristine peatland area of the world, have not previously been covered by continuous measurement and monitoring programs. The response of peatlands to climate change occurs over several decades. This paper summarizes the results of peatland carbon balance studies collected over ten years at the Mukhrino field station (Mukhrino FS, MFS) operating in the Middle Taiga Zone of Western Siberia. A multiscale approach was applied for the investigations of peatland carbon cycling. Carbon dioxide fluxes at the local scale studied using the chamber method showed net accumulation with rates from 110, to 57.8 gC m−2 at the Sphagnum hollow site. Net CO2 fluxes at the pine-dwarf shrubs-Sphagnum ridge varied from negative (−32.1 gC m−2 in 2019) to positive (13.4 gC m−2 in 2017). The cumulative May-August net ecosystem exchange (NEE) from eddy-covariance (EC) measurements at the ecosystem scale was −202 gC m−2 in 2015, due to the impact of photosynthesis of pine trees which was not registered by the chamber method. The net annual accumulation of carbon in the live part of mosses was estimated at 24–190 gC m−2 depending on the Sphagnum moss species. Long-term carbon accumulation rates obtained by radiocarbon analysis ranged from 28.5 to 57.2 gC m−2 yr−1, with local extremes of up to 176.2 gC m−2 yr−1. The obtained estimates of various carbon fluxes using EC and chamber methods, the accounting for Sphagnum growth and decomposition, and long-term peat accumulation provided information about the functioning of the peatland ecosystems at different spatial and temporal scales. Multiscale carbon flux monitoring reveals useful new information for forecasting the response of northern peatland carbon cycles to climatic changes.

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CO2 Fluxes from Different Vegetation Communities on a Peatland Ecosystem

et al. 2017

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Carbon dioxide fluxes in the ecosystem of meso-oligotrophic peatland during the transition period from autumn to winter

Cited by 5 publications

References 8 publications

Long‐Term Drainage Reduces CO₂ Uptake and CH₄ Emissions in a Siberian Permafrost Ecosystem

Long‐Term Drainage Reduces CO₂ Uptake and CH₄ Emissions in a Siberian Permafrost Ecosystem

The Multiscale Monitoring of Peatland Ecosystem Carbon Cycling in the Middle Taiga Zone of Western Siberia: The Mukhrino Bog Case Study

CO2 Fluxes from Different Vegetation Communities on a Peatland Ecosystem

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Carbon dioxide fluxes in the ecosystem of meso-oligotrophic peatland during the transition period from autumn to winter

Cited by 5 publications

References 8 publications

Long‐Term Drainage Reduces CO2 Uptake and CH4 Emissions in a Siberian Permafrost Ecosystem

Long‐Term Drainage Reduces CO2 Uptake and CH4 Emissions in a Siberian Permafrost Ecosystem

The Multiscale Monitoring of Peatland Ecosystem Carbon Cycling in the Middle Taiga Zone of Western Siberia: The Mukhrino Bog Case Study

CO2 Fluxes from Different Vegetation Communities on a Peatland Ecosystem

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Long‐Term Drainage Reduces CO₂ Uptake and CH₄ Emissions in a Siberian Permafrost Ecosystem

Long‐Term Drainage Reduces CO₂ Uptake and CH₄ Emissions in a Siberian Permafrost Ecosystem