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Organic matter stability in forest-tundra soils after wildfireстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или ScopusДата последнего поиска статьи во внешних источниках: 12 июня 2024 г.
- Авторы: Filimonenko E., Belyanovskaya A., Kurganova I., Lopes de_Gerenyu V., Merino C., Matus F., Chen C., Alharbi S.A., Soromotin A., Kuzyakov Y.
- Журнал: Catena
- Том: 243
- Номер: 10
- Год издания: 2024
- Издательство: CATENA Verlag
- Местоположение издательства: Germany
- Номер статьи: 1016
- Аннотация: Wildfires in the north circumpolar region are increasing in response to global warming and raised precipitation irregularity. Beside the short-time effects of wildfires on carbon (C) cycle by CO2 boost, the decreased amounts and availability of remaining organic matter slow down microbial decomposition over mid- and long-term. Our objective was to investigate the effects of low-intensity surface wildfire common in forest-tundra on soil organic matter (SOM) stability. We hypothesized that wildfire crucially increases organic matter stability due to pyrogenicC production, which reduces SOM availability to microorganisms. To prove this hypothesis, we analyzed SOM stability by thermal analysis (thermogravimetry and differential scanning calorimetry) combined with microbial respiration and assessed temperature sensitivity of SOM decomposition. Wildfire in forest-tundradecreased the thermal labile SOM pool by 1.6–1.9 times and increased the most stable SOM pool by 2.1 times in the O-horizon and 1.3 times in the mineral topsoil. Fire increased SOM thermal stability stronger in the Ohorizon compared to the mineral topsoil. For the first time, we revealed the relationship between SOM thermal stability and microbial activity in Cryosols. The increased stability of SOM in Cryosols raised temperaturesensitivity (Q10) of SOM decomposition by microorganisms, decreased microbial respiration (CO2 efflux) and microbial biomass content. Concluding, wildfires have strong effects on soil and microbial properties, leaving predominantly stable organic matter pools, which are less available for microorganisms.
- Добавил в систему: Курганова Ирина Николаевна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Filimonenko_et_al.Catena_2024.pdf | Filimonenko_et_al.Catena_2024.pdf | 12,1 МБ | 7 июня 2024 [ikurg] |