التفاصيل البيبلوغرافية
| العنوان: |
EFFECTS OF FOREST FIRE DISTURBANCE ON SOIL RESPIRATION AND COMPOSITION IN COLD TEMPERATE ZONE FROZEN SOIL. |
| المؤلفون: |
Hang Li, Jiangsheng Wei, Yang Shu, Yichao Zhang, Pengwu Zhao, Mei Zhou |
| المصدر: |
Fresenius Environmental Bulletin; Apr2023, Vol. 32 Issue 4, p2092-2098, 7p |
| مستخلص: |
As the main form of the carbon cycle between soil and atmosphere, soil respiration plays a crucial role in regulating the balance of soil carbon pools in terrestrial ecosystems. Taking the heavily burned area of Larix gmelini forest in the Great Xing'an Mountains permafrost region of Inner Mongolia as the research object, soil respiration and its components as well as the temperature and humidity of the 10-cm soil layer in the burned area were observed for 3 years. The effects of forest fire disturbance on soil respiration rate, heterotrophic respiration rate, autotrophic respiration rate, temperature and humidity were analysed, and the change rules of soil respiration and its components in the early recovery period after fire were found. The results showed that (1) soil respiration and heterotrophic respiration showed an increasing trend in the year of fire disturbance and reached the peak in the second year after fire, and they gradually recovered to the control level with the passage of recovery time. (2) In addition, fire disturbance increased soil respiration rate (RS) and heterotrophic respiration rate (RH) by 7.00% and 28.68%, respectively, and decreased soil autotrophic respiration by 36.28%. After forest fire disturbance, the increase of soil heterotrophic respiration will offset the decrease of soil autotrophic respiration, thereby increasing the total soil respiration. The forest fire disturbance also increased soil temperature and humidity at the 10-cm soil layer. (3) The fitting degree of RS, RH and T10 in the burned area was enhanced, whereas the fitting degree of RA was decreased. A significant positive correlation was found between soil respiration and its components and soil moisture in the burned areas and unburned sample plots, but the fitting coefficient was low (R2 > 0.13, P < 0.05). Quantitative analysis of soil respiration and its components in the L. gmelini forest ecosystem in the early recovery period after forest fire disturbance was conducted to provide a scientific basis for the study of carbon cycle changes in forest ecosystems after forest fire disturbance. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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