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Carbon exchange between ecosystems and atmosphere in the Czech Republic is affected by climate factors
Michal V Marek1, Dalibor Janouš, Klára Taufarová
1Global Change Research Centres, Academy of Science of the Czech Republic, Bělidla 4a CZ-60300 Brno, Czech Republic. marek.mv@czechglobe.cz
Abstract:
By comparing five ecosystem types in the Czech Republic over several years, we recorded the highest carbon sequestration potential in an evergreen Norway spruce forest (100%) and an agroecosystem (65%), followed by European beech forest (25%) and a wetland ecosystem (20%). Because of a massive ecosystem respiration, the final carbon gain of the grassland was negative. Climate was shown to be an important factor of carbon uptake by ecosystems: by varying the growing season length (a 22-d longer season in 2005 than in 2007 increased carbon sink by 13%) or by the effect of short- term synoptic situations (e.g. summer hot and dry days reduced net carbon storage by 58% relative to hot and wet days). Carbon uptake is strongly affected by the ontogeny and a production strategy which is demonstrated by the comparison of seasonal course of carbon uptake between coniferous (Norway spruce) and deciduous (European beech) stands.
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