Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/111822
Title: Carbon and Oxygen Gas Exchange in Woody Debris: The Process and Climate-Related Drivers
Authors: Mukhin, V. A.
Diyarova, D. K.
Gitarskiy, M. L.
Zamolodchikov, D. G.
Issue Date: 2021
Publisher: MDPI
MDPI AG
Citation: Carbon and Oxygen Gas Exchange in Woody Debris: The Process and Climate-Related Drivers / V. A. Mukhin, D. K. Diyarova, M. L. Gitarskiy et al. // Forests. — 2021. — Vol. 12. — Iss. 9. — 1156.
Abstract: The carbon-to-oxygen relationship and gas exchange balance, organic carbon to CO2 conversion intensity and efficiency, and their relevance to climate parameters and wood decay fungi were investigated for birch woody debris (WD) in the Mid-Urals mixed pine and birch forests. It was shown that, within the range of temperatures from 10 to 40◦ C and relative moisture (RM) of wood of 40% and 70%, aerobic gas exchange was observed in the WD, encompassing the physiologically entwined processes of CO2 emission and O2 uptake. Their volumetric ratio (0.9) confirmed that (1) the WD represents a globally significant CO2 source and appropriate O2 consumer and (2) the oxidative conversion of organic carbon is highly efficient in the WD, with an average ratio of CO2 released to O2 consumed equal to 90%. The balance of carbon-to-oxygen gas exchange and oxidizing conversion efficiency in the WD were not affected by either fungal species tested or by moisture or temperature. However, the intensity of gas exchange was unique for each wood decay fungi, and it could be treated as a climate-reliant parameter driven by temperature (Q10 = 2.0–2.1) and moisture (the latter induced a corresponding trend and value changes in CO2 emission and O2 uptake). Depending on the direction and degree of the change in temperature and moisture, their combined effect on the intensity of gas exchange led to its strengthening or weakening; otherwise, it was stabilized. Aerobic respiration of wood decay Basidiomycetes is an essential prerequisite and the major biotic factor in the WD gas exchange, while moisture and temperature are its climatic controllers only. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Keywords: BOREAL FOREST
CO2
GAS EXCHANGE
MOISTURE
O2
TEMPERATURE
WOOD DECAY BASIDIOMYCETES
WOODY DEBRIS
CARBON DIOXIDE
DEBRIS
EFFICIENCY
FUNGI
GASES
MOISTURE
ORGANIC CARBON
OXYGEN
WOOD
AEROBIC RESPIRATION
BIOTIC FACTORS
CLIMATE PARAMETERS
COMBINED EFFECT
OXIDATIVE CONVERSION
PARAMETER-DRIVEN
VOLUMETRIC RATIO
WOOD-DECAY FUNGI
DECAY (ORGANIC)
AIR TEMPERATURE
ATMOSPHERIC MOISTURE
BOREAL FOREST
CONIFEROUS FOREST
GAS EXCHANGE
MIXED FOREST
ORGANIC CARBON
OXYGEN
GAS
URALS
BASIDIOMYCOTA
URI: http://hdl.handle.net/10995/111822
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85114200499
PURE ID: 23739889
ISSN: 1999-4907
metadata.dc.description.sponsorship: Funding: The research was funded by RFBR, Government of the Sverdlovsk region, project number 20-44-660012, by State Assignment of Institute of Plant and Animal Ecology UB RAS (№ AAAA-A19-119031890084-6), by Program for Improving the Competitiveness of the Ural Federal University (the decree no. 211 of the Government of the Russian Federation, contract No. 02.A03.21.0006).
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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