CO2 Emission and Organic Carbon Pools in Soils of the Northern Taiga Ecosystems of Western Siberia under Different Geocryological Conditions
- Авторы: Bobrik A.1, Ryzhova I.1, Goncharova O.1, Matyshak G.1, Makarov M.1, Walker D.2
-
Учреждения:
- Lomonosov Moscow State University
- Alaska Fairbanks University
- Выпуск: Том 51, № 6 (2018)
- Страницы: 628-636
- Раздел: Soil Chemistry
- URL: https://journals.rcsi.science/1064-2293/article/view/224563
- DOI: https://doi.org/10.1134/S1064229318060042
- ID: 224563
Цитировать
Аннотация
Statistical analysis of a vast body of data collected during five field seasons (2011–2015) was performed to characterize the biological activity of soils in the northern taiga ecosystems of Western Siberia. Automorphic forest soils, hydromorphic (oligotrophic bog) soils, and semihydromorphic (flat-topped and large peat mounds) soils were characterized. Statistically significant differences of average levels of CO2 emission from the soils were identified at the ecosystem level. The CO2 emission from podzols of automorphic forest ecosystems at the peak of the growing season (205 ± 30 to 410 ± 40 mg CO2/(m2 h)) was significantly higher than the emission from semihydromorphic soils of peat mounds (70 ± 20 to 116 ± 10 mg CO2/(m2 h)). The presence and depth of permafrost was a significant factor that affected ecosystem diversity and biological activity of northern taiga soils. Statistically significant differences in the total, labile, and microbial carbon pools were observed for the studied soils. Labile and microbial carbon pools in the organic layer (10 cm) of forest podzols amounted to 0.19 and 0.66 t/ha, respectively; those in the organic layer (40 cm) of peat cryozems of flat-topped peat mounds reached 1.24 and 3.20 t/ha, and those in the oligotrophic peat soils (50 cm) of large peat mounds were 2.76 and 1.35 t/ha, respectively. The portion of microbial carbon in the total carbon pool (Cmicr/Ctot, %) varied significantly; according to the values of this index, the soils were arranged into the following sequence: oligotrophic peat soil < peat cryozem < podzol.
Об авторах
A. Bobrik
Lomonosov Moscow State University
Автор, ответственный за переписку.
Email: ann-bobrik@yandex.ru
Россия, Moscow, 119991
I. Ryzhova
Lomonosov Moscow State University
Email: ann-bobrik@yandex.ru
Россия, Moscow, 119991
O. Goncharova
Lomonosov Moscow State University
Email: ann-bobrik@yandex.ru
Россия, Moscow, 119991
G. Matyshak
Lomonosov Moscow State University
Email: ann-bobrik@yandex.ru
Россия, Moscow, 119991
M. Makarov
Lomonosov Moscow State University
Email: ann-bobrik@yandex.ru
Россия, Moscow, 119991
D. Walker
Alaska Fairbanks University
Email: ann-bobrik@yandex.ru
США, 1731 South Chandalar Drive, Fairbanks, AK, 99775