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Vegetation and Precipitation Patterns Define Annual Dynamics of CO 2 Efflux from Soil and Its Components

Author

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  • Dmitriy Khoroshaev

    (Institute of Physicochemical and Biological Problems in Soil Science of the Russian Academy of Sciences, 142290 Pushchino, Russia)

  • Irina Kurganova

    (Institute of Physicochemical and Biological Problems in Soil Science of the Russian Academy of Sciences, 142290 Pushchino, Russia)

  • Valentin Lopes de Gerenyu

    (Institute of Physicochemical and Biological Problems in Soil Science of the Russian Academy of Sciences, 142290 Pushchino, Russia)

  • Dmitry Sapronov

    (Institute of Physicochemical and Biological Problems in Soil Science of the Russian Academy of Sciences, 142290 Pushchino, Russia)

  • Sergey Kivalov

    (Institute of Physicochemical and Biological Problems in Soil Science of the Russian Academy of Sciences, 142290 Pushchino, Russia)

  • Abeer S. Aloufi

    (Department of Biology, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia)

  • Yakov Kuzyakov

    (Agro-Technological Institute, Peoples Friendship University of Russia (RUDN University), 117198 Moscow, Russia
    Department of Soil Science of Temperate Ecosystems, Georg-August University of Göttingen, 37077 Göttingen, Germany)

Abstract

Respiration of soil heterotrophs—mainly of bacteria and fungi—is a substantial part of carbon balance in terrestrial ecosystems, which tie up organic matter decomposition with the rise of atmospheric CO 2 concentration. Deep understanding and prediction of seasonal and interannual variation of heterotrophic and autotrophic components of CO 2 efflux from soil is limited by the lack of long-term, full-year measurements. To better understand the impact of current climate changes on CO 2 emissions from soils in the mixed forest and mowed grassland, we measured CO 2 efflux every week for 2 years. Heterotrophic (SOM-derived + leaf litter) and root-associated (root with rhizosphere microorganisms) components were partitioned by the root exclusion method. The total CO 2 efflux from soil was averaged 500 g C m −2 yr −1 in the forest and 650 g C m −2 yr −1 in the grassland, with shares of the no-growing cold season (Nov–Mar) of 22% and 14%, respectively. The heterotrophic component of CO 2 efflux from the soil averaged 62% in the forest and 28% in the grassland, and it was generally stable across seasons. The redistribution of the annual precipitation amounts as well as their deficit (droughts) reduced soil respiration by 33–81% and heterotrophic respiration by 24–57% during dry periods. This effect was more pronounced in the grassland (with an average decline of 56% compared to 39% in the forest), which is related to lower soil moisture content in the grassland topsoil during dry periods.

Suggested Citation

  • Dmitriy Khoroshaev & Irina Kurganova & Valentin Lopes de Gerenyu & Dmitry Sapronov & Sergey Kivalov & Abeer S. Aloufi & Yakov Kuzyakov, 2024. "Vegetation and Precipitation Patterns Define Annual Dynamics of CO 2 Efflux from Soil and Its Components," Land, MDPI, vol. 13(12), pages 1-18, December.
    • Handle: RePEc:gam:jlands:v:13:y:2024:i:12:p:2152-:d:1540880
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    References listed on IDEAS

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    1. Russell K. Monson & David L. Lipson & Sean P. Burns & Andrew A. Turnipseed & Anthony C. Delany & Mark W. Williams & Steven K. Schmidt, 2006. "Winter forest soil respiration controlled by climate and microbial community composition," Nature, Nature, vol. 439(7077), pages 711-714, February.
    2. Markus Reichstein & Michael Bahn & Philippe Ciais & Dorothea Frank & Miguel D. Mahecha & Sonia I. Seneviratne & Jakob Zscheischler & Christian Beer & Nina Buchmann & David C. Frank & Dario Papale & An, 2013. "Climate extremes and the carbon cycle," Nature, Nature, vol. 500(7462), pages 287-295, August.
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