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Global Change & Ecosystems
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SYSNO ASEP 0455365 Document Type M - Monograph Chapter R&D Document Type Monograph Chapter Title How does temperature affect carbon dioxide emissions? Author(s) Dařenová, Eva (UEK-B) RID, ORCID, SAI
Acosta, Manuel (UEK-B) RID, ORCID, SAISource Title Global Change & Ecosystems, Predictions on Terrestrial Ecosystems, Volume 1. - Brno : Global Change Research Centre, Academy of Sciences of the Czech Republic, v. v. i, 2015 / Urban O. ; Klem K. - ISBN 978-80-87902-14-1 Pages s. 130-137 Number of pages 8 s. Number of copy 150 Number of pages 215 Publication form Print - P Language eng - English Country CZ - Czech Republic Keywords CO2 assimilation ; soil ; stem ; branches ; leaves ; respiration Subject RIV DG - Athmosphere Sciences, Meteorology R&D Projects LO1415 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support RVO:67179843 - RVO:67179843 Annotation Respiration of the ecosystem returns a big portion of the CO2 assimilated by photosynthesis and the balance between these two carbon fluxes determines whether ecosystems represent sinks or sources for CO2. In this study we investigated the relationship between temperature and CO2 efflux from different ecosystem components of a spruce forest and a wetland. In addition, we also focused on factors that disturbed this relationship. The relationship between temperature and soil CO2 efflux was influenced by water stress through slower diffusion of substrates to the microbes and in lower activity of enzymes or, in contrast, by high soil water content through the lack of oxygen. The relationship between temperature and stem CO2 efflux was affected by stem growth and sap flow rate. And finally, the relationship between temperature and needle CO2 efflux can be influenced by water stress and type of the previous photoperiod (sunny/cloudy). Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2016
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