Soil respiration in larch and pine ecosystems of the Krasnoyarsk region (Russian Federation): a latitudinal comparative
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ORIGINAL PAPER
Soil respiration in larch and pine ecosystems of the Krasnoyarsk region (Russian Federation): a latitudinal comparative study Oxana V. Masyagina 1 & Oleg V. Menyailo 1 & Anatoly S. Prokushkin 1,2 & Anastasia I. Matvienko 1 & Anastasia V. Makhnykina 1,2 & Svetlana Yu. Evgrafova 1,2 & Shigeta Mori 3 & Takayoshi Koike 4,5 & Stanislav G. Prokushkin 1 Received: 20 November 2019 / Accepted: 2 September 2020 # Saudi Society for Geosciences 2020
Abstract Based on the long-term (12 years) data on soil respiration (SR) measurements in representative conifer forests of the Krasnoyarsk region (Central Siberia), we demonstrated specific characteristics of SR. The study sites located closely to Arctic Circle were related to different latitudes, including 56° N (SAE site, Krasnoyarsk), 60° N (ZOTTO site, Zotino), and 64° N (Tura site, Evenkia). Study sites were selected in forest ecosystems (> 41 years old) and represented a wide range of the climate, stand, permafrost availability, and soil types. However, the mean seasonal values of SR (mean ± SD) varied in a relatively narrow range from 2.11 ± 0.69 in the forest-steppe zone (SAE) to 2.82 ± 1.77 μmol CO2 m−2 s−1 in northern larch taiga (Tura). Nevertheless, a twofold difference in the duration of growing season among northern and southern locations results in a variation of total seasonal CO2 emissions (mean ± SD) from 216 ± 136 g C m−2 in larch stands of northern taiga to 369 ± 115 g C m−2 in larch stands of southern forest-steppe zone. Evaluation of the multiannual dynamics of SR over the past 1.5 decades (1995–2010) showed the escalation of SR in the permafrost larch stands (Tura) in 2005–2010. That has been coupled with the enhanced activity of the soil heterotrophic microbiota in 2007–2010. Our study highlights the importance of further monitoring of SR in permafrost Siberian ecosystems. Keywords Permafrost . Soil respiration . CO2 . Larch . Pine . Siberia . Soil heterotrophic respiration
Introduction
Responsible Editor: Haroun Chenchouni Electronic supplementary material The online version of this article (https://doi.org/10.1007/s12517-020-05939-x) contains supplementary material, which is available to authorized users. * Oxana V. Masyagina [email protected] 1
Sukachev Institute of Forest SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/28 Akademgorodok St, Krasnoyarsk, Russian Federation 660036
2
Siberian Federal University, 79 Svobodny Avenue, Krasnoyarsk, Russian Federation 660041
3
Yamagata University, Wakabamachi 1-23, Tsuruoka, Yamagata 997-8555, Japan
4
Hokkaido University, Sapporo 060-8589, Japan
5
Research Center for Eco-Environmental Science, Beijing 100085, China
Greenhouse gas (GHG) emissions, mostly carbon (C) dioxide (CO2), have been extensively studied over the past 3 decades all over the world (Luo and Zhou 2006; IPCC 2014). SR is assessed to be the second-largest CO2 terrestrial flux after photosynthesis (e.g., Raich and Potter 1995). SR can compete with annual fossil fuel loading of atmospheric CO 2 (Di
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