Diurnal and seasonal dynamics in temperature normalized stem CO2 efflux of Norway spruce

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67179843%3A_____%2F10%3A00343340" target="_blank" >RIV/67179843:_____/10:00343340 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—

Result language
angličtina
Original language name
Diurnal and seasonal dynamics in temperature normalized stem CO2 efflux of Norway spruce
Original language description
Stem respiration is an important part of forest ecosystem CO2 flux. We measured stem CO2 efflux continuously by an automatic system in the Norway spruce forest planted in 1981. The respiration chambers were placed on eight trees in the height of 1.3 m and on two of them also in the heights of 3.0 and 4.5 m in the growing seasons 2006 - 2009. We measured also incident radiation, precipitations, transpiration flux, stem increment rate and stem temperature. Seasonal course of stem CO2 efflux normalized to10°C (R10) followed the pattern of the stem growth. They increased in the beginning of season up to its maximum in July and then decreased. However, this dependence was disturbed by external factors especially by alternating of water stress and rain events. Rain events after a dry period caused increase in R10 up to 60%. We observed diurnal course of R10 with maxima during night hours. Oscillation of R10 had amplitude up to 50% of mean daily (24 hours) value of R10.
Czech name
—
Czech description
—

Project
<a href="/en/project/2B06068" target="_blank" >2B06068: Evaluation, Verification and Interpretation of the environmental loads of the Czech Republic</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)