Analysis of the Long-Term Soil Respiration Dynamics in the Forest and Meadow Cenoses of the Prioksko-Terrasny Biosphere Reserve in the Perspective of Current Climate Trends

Kurganova, I.N.; Lopes de Gerenyu, V.O.; Khoroshaev, D.A.; Myakshina, T.N.; Sapronov, D.V.; Zhmurin, V.A.; Kudeyarov, V.N.

Авторы: Kurganova I.N., Lopes de Gerenyu V.O., Khoroshaev D.A., Myakshina T.N., Sapronov D.V., Zhmurin V.A., Kudeyarov V.N.
Журнал: Eurasian Soil Science
Том: 53
Номер: 10
Год издания: 2020
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 1421
Последняя страница: 1436
DOI: 10.1134/s1064229320100117
Аннотация: A combined analysis of the current climate trends and the dynamics of soil respiration undersoddy–weakly podzolic sandy-loamy soil (Entic Podzol (Arenic)) in the forest and meadow cenoses in thePrioksko-Terrasny Biosphere Reserve (southern part of the Moscow oblast) is performed. During the observationperiod (1998–2018), distinct trends of an increase in the average annual air temperature (Tair) and aridityof the summer season as well as a decrease in the duration of stable snow cover are observed. A generaltrend of a decrease in the total CO2 fluxes from the Entic Podzol (Arenic) under a forest and a meadow forall seasons of the year and throughout the year is also observable on this background. The linear trends of adecrease in the annual and fall seasonal CO2 fluxes from the soils in both cenoses are statistically significant(P < 0.05). Over the 21-year observation period, the monthly average CO2 fluxes from soils have tightly correlatedwith the average monthly Tair (r = 0.78–0.84, P < 0.001). In dry years, the temperature sensitivity ofsoils expressed via the Q10 coefficient is by 10–12% lower, than in the years with normal moistening. Theaverage long-term values of annual soil respiration (AnSR) in the forest and meadow cenoses amount to581 ± 54 and 727 ± 71 g C/(m2 year), respectively, with an interannual variation of 20–22%. The AnSR andsummer hydrothermal coefficient are the most closely related explaining 51–56% of the variance in annualCO2 fluxes from soils. The warm season (May–October), which coincides with the period of active plant vegetation,accounts for 73–77% of the AnSR. However, the share of the cold season (November–April) in theannual CO2 flux from soils may reach 38–39% in individual years. Expansion of the network of stationarylong-term year-round monitoring of soil respiration is a necessary condition for obtaining both more realisticestimates of the CO2 fluxes from soils and predictions of the ecosystem responses to the current and futureclimate changes.
Добавил в систему: Курганова Ирина Николаевна

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Analysis of the Long-Term Soil Respiration Dynamics in the Forest and Meadow Cenoses of the Prioksko-Terrasny Biosphere Reserve in the Perspective of Current Climate Trendsстатья

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