Reserves of carbon in the organic matter of postfire pine forests in the southwest of the Baikal region

Vedrova, Ė. F.; Evdokimenko, M. D.; Bezkorovaynaya, I. N.; Mukhortova, L. V.; Cherednikova, Yu. S.

doi:10.1134/s1995425512070098

Cited by 8 publications

(3 citation statements)

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“…Dead wood in the native boreal forests usually does not contribute much to greenhouse gases in the atmosphere due to the low rate of CWD decomposition [3]. However, in disturbed ecosystems (e.g., post-fire ecosystems, after the windfall, post-logging ecosystems and in the forests destroyed by pests), the amount of dead wood can increase significantly, thus turning into an important source of carbon dioxide emission [3,[5][6][7][8]. Besides, the greenhouse gas emission from CWD can play a crucial role during spring and autumn, when the photosynthetic ability of plants is decreased [9].…”

Section: Introductionmentioning

confidence: 99%

Temperature Sensitivity of CO2 and CH4 Fluxes from Coarse Woody Debris in Northern Boreal Forests

Mukhortova

Pashenova

Meteleva

et al. 2021

Forests

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Carbon dioxide (CO2) and methane (CH4) are recognized as the main greenhouse gases causing climate warming. In forest ecosystems, the death of trees leads to the formation of coarse woody debris (CWD) that is one of the sources of greenhouse gas emissions due to wood decomposition. We quantified the CO2 and CH4 fluxes from CWD of larch (Larix gmelinii (Rupr.)) and birch (Betula tortuosa Ledeb.) collected in the northern boreal forests of Central Siberia. The CWD samples were incubated at +5, +15 and +25 °C. The CO2 and CH4 fluxes showed strong correlations with temperature, moisture, decomposition stage and the type of wood’s rot. The temperature coefficient Q10 indicated higher temperature sensitivity of CO2 flux within the temperature interval from +5 to +15 °C than from +15 to +25 °C. Methane flux had higher temperature sensitivity within the interval from +15 to +25 °C. It was found that, in boreal forests, CWD of early decay stage can serve as a source of methane to the atmosphere when air temperatures increased above +15 °C. Strong positive correlation between CH4 production and CO2 emission indicated a biological source and supported findings on aerobic origin of the main process contributing to the CH4 flux from decomposing CWD.

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Section: Introductionmentioning

confidence: 99%

Temperature Sensitivity of CO2 and CH4 Fluxes from Coarse Woody Debris in Northern Boreal Forests

Mukhortova

Pashenova

Meteleva

et al. 2021

Forests

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“…Our modelled results also correspond well with field observations. Fires of medium severity in the southwest Baikal region led to a 5–9% decrease of total SOM stocks in a 65‐year‐old Scots pine ecosystem, and more intense fires reduced the growing stock by 18% and SOM pools by 24% (Vedrova, Evdokimenko, Bezkorovainaya, Mikhortova, & Cherednikova, ). The degree of damage to Psamment Entisols in the Samara region from repeated surface fires in the EFIMOD simulations and from field data (Maksimova et al, ) was in close agreement.…”

Section: Resultsmentioning

confidence: 99%

Recurring surface fires cause soil degradation of forest land: A simulation experiment with the EFIMOD model

et al. 2018

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Renewal of pine forests is ecologically dependent on fires, but if fires become too frequent, they can disrupt the equilibrium and sustainability of these ecosystems. Field studies of the effects of fire are challenging because of the heterogeneity of forest ecosystems and because of the heterogeneous effect of fire on recovery of vegetation. As an alternative to complex field studies, mathematical models can be used as a tool to assess the complex dynamics of natural ecosystems as they recover after fire. The aim of this study was to apply the ecosystem model EFIMOD to analyse the effect of surface fires on soil degradation and its feedback on tree productivity in Scots pine forests on different soil types in Russia: Haplic Podzols in the Leningrad region and Psamment Entisols of the fragmented steppe in the Samara region. Simulation of the cumulative effects of fire cycles over 140 years showed that one fire did not affect growing stock but decreased soil organic matter by about 10% at both sites, and that three fires reduced the growing stock by 30% on the Haplic Podzols and 9% on the Psamment Entisols and decreased soil organic matter by about 30% on both sites. Forest fires led to the loss of soil carbon (C), as well as nitrogen (N), which is a principal limiting factor in forest ecosystems of boreal and temperate ecozones. The effect of repeated fire cycles on land degradation is similar to that of soil erosion, through the loss of soil C and N.

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“…Fuel loads B i (FRP) in various forest stands of Siberia are estimated in a wide range of 5.0-60.0 t/ha [33][34][35][36][37][38][39][40]. At the same time, in Equation ( 4), the specific values of combusted fuels (kg/m 2 ) were taken as follows: 0.11-0.97 kg/m 2 , 0.86-2.15 kg/m 2 , and 2.25-5.36 kg/m 2 for low-intensity, moderate-intensity and high-intensity combustion, correspondingly [10,41].…”

Section: Methodsmentioning

confidence: 99%

Wildfire Intensity and Fire Emissions in Siberia

Пономарев

Zabrodin

Shvetsov

et al. 2023

Fire

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An analysis of fire characteristics in the boreal forests of Siberia (50–75° N, 60–140° E) was performed for the period 2002–2022. We found a positive trend in the proportion of high-intensity fires in dominant forest stands of Siberia based on long-term series of variations in the Fire Radiative Power (FRP) measurements from the Moderate Resolution Imaging Spectroradiometer (MODIS). Our results showed that there was an increase in the proportion of areas of high-intensity fires over the past decade on about ~30% of the boreal forests of Siberia, including the Arctic zone. For the sample group of fires, the level of correlation (R2 = 0.80–0.94) between the fire impact, classified according to the NBR/dNBR technology, and the integral FRP values was revealed. The intensity of combustion in terms of FRP is associated with the volume of burned biomass and determines the dynamics of specific emissions values per unit area. The results suggest that further increase in fire emissions in Siberia will be determined not only by an increase of burned areas, but also by a redistribution of low- and high-intensity burning and an increase in specific emission values. Finally, we estimated that Siberian fires are responsible for about 5–20% of the total volume of greenhouse gas emissions in the Russian Federation, depending on the fire season scenario. The recurrence of extremely high emissions (296–350 Tg C/year) will make it possible to consider part of Siberian forests as a source of carbon in the nearest future.

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Reserves of carbon in the organic matter of postfire pine forests in the southwest of the Baikal region

Cited by 8 publications

References 1 publication

Temperature Sensitivity of CO2 and CH4 Fluxes from Coarse Woody Debris in Northern Boreal Forests

Temperature Sensitivity of CO2 and CH4 Fluxes from Coarse Woody Debris in Northern Boreal Forests

Recurring surface fires cause soil degradation of forest land: A simulation experiment with the EFIMOD model

Wildfire Intensity and Fire Emissions in Siberia

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