Net Ecosystem Exchange, Gross Primary Production And Ecosystem Respiration In Ridge-Hollow Complex At Mukhrino Bogстатья
Статья опубликована в журнале из списка RSCI Web of Science
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Дата последнего поиска статьи во внешних источниках: 4 мая 2020 г.
Аннотация:The continuous field measurements of net ecosystem exchange (NEE) of CO 2
were provided at ridge-hollow oligotrophic bog in the Middle Taiga zone of West Siberia,
Russia in 2017-2018. The model of net ecosystem exchange of CO 2 was suggested to
describe the influence of different environmental factors on NEE and to estimate the
total carbon budget of the bog over the growing season. The model uses air and soil
temperature, incoming photosynthetically active radiation (PAR) and water table depth,
as the key factors influencing gross primary production (GPP) and ecosystem respiration
(ER). The model coefficients were calibrated using the data collected by automated soil
CO 2 flux system with two transparent long-term chambers placed at large hollow and
small ridge sites.
Experimental and modeling results showed that the Mukhrino bog acted over the study
period as a carbon sink, with an average NEE of –87.7 gC m -2 at the hollow site and –50.2
gC m -2 at the ridge site. GPP was – 344.8 and –228.5 gC m -2 whereas ER was 287.6 and
140.9 gC m -2 at ridge and hollow sites, respectively. Despite of a large difference in NEE
estimates between 2017 and 2018 the growing season variability of NEE were quite
similar.