The carbon balance of a young Beech forest

• DOI: 10.1046/j.1365-2435.2000.00434.x
• Publication Date: 2003-03-11T20:45:50Z
• Authors: A. Granier; E. Ceschia; C. Damesin; E. Dufrêne; D. Epron; P. Gross; S. Lebaube; V. Le Dantec; N. Le Goff; D. Lemoine; E. Lucot; J. M. Ottorini; J. Y. Pontailler; B. Saugier
• Keywords: Ecosystem respiration; Soil respiration; Seasonality; Q10

Abstract 1. We present measurements of CO 2 fluxes over years above and within a young Beech stand in the east France. This site is part Euroflux network set up to monitor representative European forests. 2. The net ecosystem carbon (C) exchange was derived from continuous eddy flux measurements. Major components total (i.e. soil above‐ground biomass respiration assimilation leafy branches) were measured independently using chambers. main C stocks root, stem branch biomass) also quantified. 3. Daily minima typically around −20 µmol m −2 s −1 during period full leaf expansion, while night‐time varied between 5 15 . seasonal pattern very close that at single scale. variation closely related expansion water content dry year 1996. 4. Measurements (eddy flux) corrected for storage stand. showed pattern, maximum rates (4–7 g day ) occurring spring summer, appeared be correlated with temperature. Temporal same effects both temperature drying found. Annual ≈ 70% respiration. Root 60% below‐ground 5. −218 −257 1996 1997, respectively, corresponding uptake by forest. These values are much lower than annual increment (stems large roots) stand: 427 471 , respectively. difference may explained release decomposition woody debris. 6. Ecosystem loss 800–1000 Gross gain 1000–1300 therefore played major role balance this