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The multiscale monitoring of peatland ecosystem carbon cycling in the middle taiga zone of Western Siberia: the Mukhrino bog case studyстатья
- Авторы: Dyukarev E., Zarov E., Alekseychik P., Nijp J., Filippova N., Mammarella I., Filippov I., Bleuten W., Khoroshavin V., Ganasevich G., Meshcheryakova A., Vesala T., Lapshina E.
- Журнал: LAND
- Том: 10
- Год издания: 2021
- Номер статьи: 824
- DOI: 10.3390/land10080824
- Аннотация: The peatlands of the West Siberian Lowlands, comprising the largest pristine peatlandarea of the world, have not previously been covered by continuous measurement and monitoringprograms. The response of peatlands to climate change occurs over several decades. This papersummarizes the results of peatland carbon balance studies collected over ten years at the Mukhrinofield station (Mukhrino FS, MFS) operating in the Middle Taiga Zone of Western Siberia. A multiscaleapproach was applied for the investigations of peatland carbon cycling. Carbon dioxide fluxes atthe local scale studied using the chamber method showed net accumulation with rates from 110, to57.8 gC m−2 at the Sphagnum hollow site. Net CO2 fluxes at the pine-dwarf shrubs-Sphagnum ridgevaried from negative (−32.1 gC m−2 in 2019) to positive (13.4 gC m −2 in 2017). The cumulative May-August net ecosystem exchange (NEE) from eddy-covariance (EC) measurements at the ecosystem scale was −202 gC m−2 in 2015, due to the impact of photosynthesis of pine trees which was notregistered by the chamber method. The net annual accumulation of carbon in the live part of mosseswas estimated at 24–190 gC m−2 depending on the Sphagnum moss species. Long-term carbon accumulation rates obtained by radiocarbon analysis ranged from 28.5 to 57.2 gC m−2 yr−1 , withlocal extremes of up to 176.2 gC m−2 yr −1 . The obtained estimates of various carbon fluxes using EC and chamber methods, the accounting for Sphagnum growth and decomposition, and long-term peat accumulation provided information about the functioning of the peatland ecosystems at different spatial and temporal scales. Multiscale carbon flux monitoring reveals useful new information for forecasting the response of northern peatland carbon cycles to climatic changes.
- Добавил в систему: Дюкарев Егор Анатольевич