Greenhouse gas emission from the cold soils of Eurasia in natural settings and under human impact: Controls on spatial variability

Карелин, Д. В.; Goryachkin, S. V.; Zazovskaya, E. P.; Шишков, В. А.; Pochikalov, A. V.; Долгих, А. В.; Sirin, Andrey; Suvorov, Gennady; Badmaev, N. B.; Badmaeva, N. K.; Tsybenov, Yuri; Куликов, А. И.; Danilov, Petr; Savinov, G. N.; Desyatkin, Alexey; Desyatkin, Roman; Kraev, Gleb

doi:10.1016/j.geodrs.2020.e00290

Cited by 29 publications

(16 citation statements)

References 32 publications

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“…The measurements were carried out using a plastic cylinder with a diameter of 9 cm, a height of 30 cm, dug into the ground to the depth of a loose substrate, but not more than 5 cm, or mounted on the surface of a dense substrate and sealed at the border of the substrate and the chamber (Karelin et al, 2020). A portable cap with an attached LI -6200 analyzer sensor (Li-Cor Inc., Lincoln, Nebraska, USA) was hermetically sealed on the cylinder.…”

Section: Methodsmentioning

confidence: 99%

Сarbon fluxes intensity from substrates and phototrophic consortiums of the photic zones in Montenegro caves

et al. 2020

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Сarbon dioxide fluxes from substrates and consortiums were estimated for the first time in the photic zones of seven caves of Montenegro. The dependence of consortiums productivity with their species composition and structure, as well as determination of the priority source of carbon dioxide for the primary producers of trophic chains of the photic zones were revealed.Five consortiums were distinguished in the fouling communities of the photic zones of seven karst caves of Montenegro: with the dominance of acrocarpous mosses, pleurocarpous mosses, green algae, cyanobacteria biofilms and sheath-forming cyanobacteria on various substrates. The closed chamber technique was used to calculate carbon fluxes. The net carbon flux, gross respiration of substrates and consortiums, and gross primary production of consortiums in the summer and winter were determined. The biomass of the phototrophic and heterotrophic components of the consortiums was estimated. Isotopic analysis of clay deposits and phytomass of bryophytes in the consotriums as well as on the surface was carried out. All of the investigated consortiums function as a carbon sink in both seasons, providing a negative balance to the atmosphere. Consortiums with the dominance of bryophytes possessed the greatest biomass, spores of micromycetes dominated in the heterotrophic component. The respiration of substrates was maximized on clay deposits, the respiration rate increased in winter. Phototrophic respiration and gross primary production were maximal in the consortiums of acrocarpous mosses and case-forming cyanobacteria in terms of dry phytomass. Increased content of the light carbon isotope 12C in the bryophytes phytomass in the photic zones compared to the bryophytes phytomass on the surface was established.

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Section: Methodsmentioning

confidence: 99%

Сarbon fluxes intensity from substrates and phototrophic consortiums of the photic zones in Montenegro caves

et al. 2020

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“…4). The development of this site itself bears a number of significant differences in the rate of post-human intervention recovery, including emission rates (Karelin et al 2020). Seasonal measurements at the site began 5 years after the disturbance, and now we can be sure that this time is not enough for the restoration of the territory as it is largely reflected in the emission fluxes.…”

Section: T-swc Model: Estimates For Different Ecosystems and Different Seasonsmentioning

confidence: 99%

Soil moisture as determinant of the seasonal soil co2 emission: evidence from central siberia

Makhnykina

Tychkov

Prokushkin³

et al. 2021

Preprint

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Background The soils of the boreal zone contain significant reserves of carbon, therefore, their response to current climate changes will significantly affect the sustainability of forest ecosystems and the future concentration of CO 2 in the atmosphere. When modeling soil emission, it is necessary to focus on the main soil environment factors. In this paper, a simple exponential model of the soil CO 2 emissions growth was modified by introducing an additional parameter - the threshold soil moisture in different types of ecosystems based on the direct measurements. Results The developed model adequately reflects the dynamic changes in soil emission for different types of ecosystems. This result was achieved by including moisture as a second environmental factor besides temperature, describing changes in soil CO 2 emissions during the summer period. The error of direct measurements for all measuring seasons was about 20% of the values of direct measurements of the CO 2 flux. Note that such a high error was observed once per season in early and mid-June, reaching 60-80% on some days. Our models demonstrate in the season with the highest amount of precipitation the smallest differences in modeled fluxes about 15-20%, which indirectly indicates that the emission flux is not inhibited by insufficient moisture in this season. Conclusions The final model application depends on the characteristics of the microclimatic conditions of a particular ecosystem, namely, a factor that has a limiting effect on the biological processes. When studying the functional role of boreal forest ecosystems the moisture conditions consideration is crucial to explain the atmospheric CO 2 emission processes.

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“…The problem of identifying and quantifying permanent factors of CO 2 emission from various types of soils has now been elaborated in sufficient detail (Zavarzin and Kudeyarov 2006;Kuzyakov 2006;Luo and Zhou 2006;Kudeyarov et al 2007;Naumov 2009;Stepanov 2011;Chen et al 2014;Karelin et al 2014Karelin et al , 2020Kurganova et al 2020) and might be considered close to final solution. Importantly, the results of these studies have been «digitized» in the form of simulation mathematical models at various scales (Jenkinson et al 1987;Li et al 1992;McGuire et al 2001;Raich et al 2002;Chertov and Komarov 2013).…”

Section: Introductionmentioning

confidence: 99%

“…These are likely to include factors whose marked effects are infrequent, only when they reach a certain degree of severity or threshold. The increased attention to such sporadic or locally acting CO 2 emission controls is due to the fact that their contribution to the annual carbon budget can often be significant (Kuzyakov and Blagodatskaya 2015;Leon et al 2014;Ohashi et al 2007;Karelin et al 2017).…”

Section: Introductionmentioning

confidence: 99%

“…However, there is still no consensus on its biospheric significance (Moyano et al 2013;Oikawa et al 2014). The one-time contribution of the additional emission caused by this effect can be very noticeable, especially after prolonged droughts (Karelin et al 2017), although the overall reduction of soil respiration caused by drought significantly negates this contribution (Lopes de Gerenyu et al 2018). The winter analogue of such «wetting-drying» cycles can probably be considered sporadic «freezing-thawing» cycles, which also cause a substantial pulse release of CO 2 (Kurganova and Lopes de Gerenyu 2015).…”

Section: Introductionmentioning

confidence: 99%

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Contribution Analysis Of Permanent And Sporadic Controls Of Co2 Efflux From Chernozems Over Four Seasons

Карелин

Суховеева

2021

GES

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We analyzed four years field observations (2017–2020) of soil CO2 efflux from Chernozems of arable and foreststeppe ecosystems of Kursk region (Russia), which correspond to the period of the maximal current warming. Three wellknown simulation models of different structure and variable sets (DNDC, RothC, T&P) and nonparametric regression analysis were used to estimate annual CO2 emission from soil and contributions of constant and sporadic controls. The applied models satisfactorily predict both the rate of annual soil CO2 emission and its seasonal dynamics on arable Chernozems. However, while RothC is suitable for the whole set of crops considered, DNDC is most suitable for cereals and T&R for bare soils only. A comparison of the contributions of permanent and sporadic factors to soil respiration showed that on an inter-annual scale soil temperature and moisture are less important than yearly crop rotation in Chernozem plowlands, making the latter the most important predictor apart from general land-use type. Although the combination of significant permanent and sporadic factors is able to explain 41% of the soil CO2 emission variance, the leading involvement of spatial controls prevents the construction of quantitative regression models that are able to make forecasts, requiring the use of more sophisticated simulation models (i.e. RothC) in this case. However, the use of the latter does not yet solve the problem of predicting soil CO2 emission and its net balance in forest-covered or steppe areas of Chernozem forest-steppe landscape.

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Greenhouse gas emission from the cold soils of Eurasia in natural settings and under human impact: Controls on spatial variability

Cited by 29 publications

References 32 publications

Сarbon fluxes intensity from substrates and phototrophic consortiums of the photic zones in Montenegro caves

Сarbon fluxes intensity from substrates and phototrophic consortiums of the photic zones in Montenegro caves

Soil moisture as determinant of the seasonal soil co2 emission: evidence from central siberia

Contribution Analysis Of Permanent And Sporadic Controls Of Co2 Efflux From Chernozems Over Four Seasons

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