Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.3390/f12010107

Ключевые слова: boreal forests, carbon, greenhouse gases, high latitudes, larix, soil heterotrophic respiration, soil temperature, soil water content, tura, wildfires

Аннотация: The observed high spatial variation in soil respiration (SR) and associated parameters emphasized the importance of SR heterogeneity at high latitudes and the involvement of many factors in its regulation, especially within fire-affected areas. The problem of estimating CO2 emissions during post-fire recovery in high-latitude ecosystems addresses the mutual influence of wildfires and climate change on the C cycle. Despite its importance, especially in permafrost regions because of their vulnerability, the mutual influence of these factors on CO2 dynamics has rarely been stud-ied. Thus, we aimed to understand the dynamics of soil respiration (SR) in wildfire-affected larch recovery successions. We analyzed 16-year data (1995–2010) on SR and associated soil, biological, and environmental parameters obtained during several field studies in larch stands of different ages (0–276 years) in the Krasnoyarsk region (Russia). We observed a high variation in SR and related parameters among the study sites. SR varied from 1.77 ± 1.18 (mean ± SD) µmol CO2 m−2 s−1 in the 0–10-year-old group to 5.18 ± 2.70 µmol CO2 m−2 s−1 in the 150–276-year-old group. We found a significant increasing trend in SR in the 88–141-year old group during the study period, which was related to the significant decrease in soil water content due to the shortage of precipitation during the growing season. We observed a high spatial variation in SR, which was primarily regulated by biological and environmental factors. Different parameters were the main contributors to SR in each group, an SR was significantly affected by the inter-relationships between the studied parameters. The obtained results can be incorporated into the existing SR databases, which can allow their use in the construction and validation of C transport models as well as in monitoring global fluctuations in the C cycle in response to climate change. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Журнал: Forests

Выпуск журнала: Vol. 12, Is. 1

Номера страниц: 1-25

ISSN журнала: 19994907

Издатель: MDPI AG

• Masyagina Oxana V. (RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, Sukachev Inst Forest, 50-28 Akademgorodok St, Krasnoyarsk 660036, Russia)
• Evgrafova Svetlana Y. (RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, Sukachev Inst Forest, 50-28 Akademgorodok St, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, 79 Svobodny Ave, Krasnoyarsk 660041, Russia; RAS, Melnikov Permafrost Inst SB, 36 Merzlotnaya St, Yakutsk 677010, Russia)
• Menyailo Oleg V. (RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, Sukachev Inst Forest, 50-28 Akademgorodok St, Krasnoyarsk 660036, Russia)
• Mori Shigeta (Yamagata Univ, Fac Agr, Wakabamachi 1-23, Tsuruoka, Yamagata 9978555, Japan)
• Koike Takayoshi (Hokkaido Univ, Res Fac Agr, Sapporo, Hokkaido 0608589, Japan; Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China)
• Prokushkin Stanislav G. (RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, Sukachev Inst Forest, 50-28 Akademgorodok St, Krasnoyarsk 660036, Russia)

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