Soil CO<sub>2</sub> efflux in a beech forest: dependence on soil temperature and soil water content

Epron, Daniel; Farque, Lætitia; Lucot, Éric; Badot, Pierre‐Marie

doi:10.1051/forest:19990304

Cited by 196 publications

(175 citation statements)

References 13 publications

Supporting

Mentioning

147

Contrasting

Unclassified

Order By: Relevance

“…III) fall within the range (2.0-6.3) reported for European and North-American forest ecosystems [14,28]. Under beech, the TSR Q 10 is at the higher end of the range (2.7-4.6) reported for European beech forests [7,21,28], while the TSR Q 10 under oak is close to the value (3.25) reported in the study of Curiel et al [12] for pedonculate oak. Concerning the laboratory incubation of the Ah horizon, the Q 10 s correspond well to the findings of Winkler et al [44] who incubated the Ah horizon of a forest soil and obtained Q 10 s varying between 1.9 and 1.7 over a temperature range of 4 to 28 • C.…”

Section: Temperature Effectsupporting

confidence: 64%

Soil carbon dioxide efflux in pure and mixed stands of oak and beech

et al. 2007

View full text Add to dashboard Cite

-Total Soil Respiration (TSR) was measured in pure and mixed stands of oak and beech and was partitioned into two contributions using the forest floor removal technique: Mineral Soil Respiration (MSR) and Forest Floor Respiration (FFR). In addition, laboratory incubations of the forest floor and the Ah horizon were performed to evaluate the heterotrophic respiration and the DOC production of these horizons. The relationships between soil temperature and the various soil respiration contributions in the three stands were compared using Q 10 functions. In situ, significant differences (α = 0,05) between stands were observed for the R 10 parameter (respiration rate at 10 • C) of the TSR, MSR and FFR contributions, while only the temperature sensitivity (Q 10 ) of TSR was significantly affected by stand composition. The effect of soil water content was only significant on MSR and followed different patterns according to stand composition. Under controlled conditions, the R 10 of the forest floor and of the Ah horizon varied with stand composition and the Q 10 of the forest floor decreased in the order: oak (2.27) > mixture (2.01) > beech (1.71).soil respiration / partitioning / species effect / mixed stand / abiotic factors Résumé -Flux de CO 2 en provenance du sol en peuplements purs et mélangés de chêne et de hêtre. La respiration totale du sol (RTS) a été mesurée en peuplements purs et mélangés de chêne et de hêtre et a été subdivisée en deux contributions en enlevant les couches holorganiques de certaines zones de mesure (RSM : respiration du sol minéral et RCH : respiration des couches holorganiques). De plus, des échantillons de couches holorganiques et d'horizon Ah ont été incubés en laboratoire pour évaluer la respiration hétérotrophique et la production de DOC de ces horizons. Des fonctions Q 10 ont été utilisées pour comparer les trois peuplements au niveau de la réponse à la température des différentes contributions à RTS. In situ, des différences significatives (α = 0.05) entre peuplements ont été mises en évidence en ce qui concerne le paramètre R 10 (flux à 10 • C) de toutes les contributions (RTS, RSM, RCH) et la sensibilité à la température (Q 10 ) de RTS uniquement. L'effet de la teneur en eau du sol était seulement significatif sur RSM et variait en fonction de la composition spécifique du peuplement. En conditions contrôlées, le paramètre R 10 des couches holorganiques et de l'horizon Ah était significativement influencé par la composition spécifique ; la respiration hétérotrophique des couches holorganiques présentait une sensibilité à la température décroissant suivant l'ordre : chênaie (2,27) > mélange (2,01) > hêtraie (1,71). respiration du sol / effet espèce / peuplement mélangé / facteurs abiotiques

show abstract

Section: Temperature Effectsupporting

confidence: 64%

Soil carbon dioxide efflux in pure and mixed stands of oak and beech

et al. 2007

View full text Add to dashboard Cite

show abstract

“…If we consider now that respiration from roots (R r ) represents 60% of the CO 2 flux from the soil (R sr ), as observed by Epron et al [10] in a beech stand of the same age, root respiration (R r ) in equations (6) and (7) can be calculated as:…”

Section: Carbon Balancementioning

confidence: 99%

“…In the absence of direct measurements, ecosystem respiration (R E , µmol CO 2 m -2 s -1 ) and belowground respiration (R sr , µmol CO 2 m -2 s -1 ) were estimated from equations obtained by Granier et al [15] for R E and by Epron et al [10] for R sr :…”

Section: Carbon Balancementioning

confidence: 99%

Biomass increment and carbon balance of ash (Fraxinus excelsior) trees in an experimental stand in northeastern France

et al. 2004

View full text Add to dashboard Cite

-In this study, we compared the annual biomass increment of ash trees to their annual carbon balance calculated from the end of the growing season in 1994 to the end of the next one in 1995. In 1995, three trees of variable competitive status and aged 25 were studied. Stem, branch and root biomass increments were derived from detailed measurements. Tree crowns were divided vertically into three layers. In each crown layer, the foliage biomass and area were determined, net CO 2 assimilation (A n ) and global radiation (R g ) were measured regularly throughout the growing season. Outside this period, R g was estimated from global radiation measured above the canopy and from estimations of light transmittance. Net assimilation of trees (A N ) was obtained by scaling leaf A n to the tree level, using relations established between A n and R g for each crown layer, the distribution of foliage area, and measured climatic data. Above-and below-ground tree respirations, not measured, were estimated. A n was correlated to R g and potential evapotranspiration. It decreased from the upper to the lower crown layers, but was independent of tree competitive status. Total estimated respiration of trees accounted for about 37% of gross assimilation. The proportion of carbon allocated to the stem was more than 45%. Net productivity of trees obtained from simulated annual carbon fluxes compared reasonably well with the biomass increment of trees.biomass partitioning / carbon assimilation / respiration / scaling / leaf area Résumé -Accroissement en biomasse et bilan de carbone du frêne dans un peuplement expérimental du nord-est de la France. Cette étude avait pour but de comparer l'accroissement annuel en biomasse de frênes à leur bilan de carbone établi par estimation de la photosynthèse et de la respiration sur une année complète (depuis la fin de la saison de végétation 1994 à la fin de celle de 1995). En 1995, trois frênes de différents statuts concurrentiels âgés de 25 ans ont été étudiés. Les accroissements en biomasse de la tige, des branches et des racines ont été obtenus à partir de mesures détaillées. Les houppiers des arbres ont été divisés verticalement en trois strates. Pour chaque strate, les variables suivantes ont été mesurées: la biomasse et la surface foliaires, la photosynthèse et le rayonnement global (R g ) pendant la période de croissance. En dehors de cette période, le rayonnement global a été estimé à partir du rayonnement global hors couvert et de valeurs estimées de la transmittance pour chaque strate. L'assimilation nette des arbres (A N ) a été obtenue en extrapolant l'assimilation nette foliaire (A n ) à partir des relations établies entre A n et R g pour chaque strate du houppier, de la distribution du feuillage par strate et des données climatiques mesurées. La respiration des arbres, non mesurée, a été estimée. L'assimilation nette A n est liée à R g et à l'évapotranspiration potentielle et décroît du haut vers le bas du houppier ; elle est indépendante du statut concurrentiel des arbres. L...

show abstract

“…Soil respiration is generally the largest TER component in forests and influences NEE to a large extent. From soil respiration measurements using chambers in 1996, 1997 (Epron et al, 1999a;Granier et al, 2000b(Ngao, 2005, Rs/TER was on average 0.64 at Hesse (0.58 to 0.69), i.e. close to the mean value of 0.69 found in 18 European forests by Janssens et al (2001).…”

Section: Gpp Ter Npp and Soil Respirationmentioning

confidence: 99%

Ten years of fluxes and stand growth in a young beech forest at Hesse, North-eastern France

et al. 2008

View full text Add to dashboard Cite

Keywords:Carbon balance / evapotranspiration / climate / biomass increment / interannual variability / net primary productivity / drought / Fagus sylvatica Abstract • Water and carbon fluxes, as measured by eddy covariance, climate, soil water content, leaf area index, tree biomass, biomass increment (BI), litter fall and mortality were monitored for 10 successive years in a young beech stand in Hesse forest (north-eastern France) under contrasting climatic and management conditions.• Large year-to-year variability of net carbon fluxes (NEE) and to a lesser extent, of tree growth was observed. The variability in NEE (coefficient of variation, CV = 44%) was related to both gross primary production (GPP) and to variations in total ecosystem respiration (TER), each term showing similar and lower interannual variability (CV = 14%) than NEE. Variation in the annual GPP was related to: (i) the water deficit duration and intensity cumulated over the growing season, and (ii) the growing season length, i.e. the period of carbon uptake by the stand. Two thinnings occurring during the observation period did not provoke a reduction in either GPP, water fluxes, or in tree growth. Interannual variation of TER could not be explained by any annual climatic variables, or LAI, and only water deficit duration showed a poor correlation. Annual biomass increment was well correlated to water shortage duration and was significantly influenced by drought in the previous year.• The relationship between annual NEE and biomass increment (BI) was poor: in some years, the annual carbon uptake was much higher and in others much lower than tree growth. However this relationship was much stronger and linear (r 2 = 0.93) on a weekly to monthly time-scale from budburst to the date of radial growth cessation, indicating a strong link between net carbon uptake and tree growth, while carbon losses by respiration occurring after this date upset this relationship.• Despite the lack of correlation between annual data, the NEE and BI cumulated over the 10 years of observations were very close.• On the annual time-scale, net primary productivity calculated from eddy fluxes and from biological measurements showed a good correlation. Mots-clés :bilan de carbone / évapotranspiration / climat / accroissement en biomasse / variabilité interannuelle / productivité primaire nette / contrainte hydrique / Fagus sylvatica Résumé -Dix années de mesures de flux et de croissance dans une jeune hêtraie du nord-est de la France, en forêt de Hesse.• Les flux d'eau et de dioxyde de carbone, mesurés par la méthode des corrélations turbulentes, le climat, le contenu en eau du sol, l'indice foliaire, la biomasse et l'accroissement en biomasse (BI) des arbres, les chutes de litière et la mortalité ont été suivis en continu pendant 10 années successives dans une jeune hêtraie de la forêt de Hesse (nord-est de la France) en conditions de climat et de gestion contrastées.• Une forte variabilité interannuelle des flux nets de carbone (NEE) et dans une moindre mesure de la crois...

show abstract

Soil CO₂ efflux in a beech forest: dependence on soil temperature and soil water content

Cited by 196 publications

References 13 publications

Soil carbon dioxide efflux in pure and mixed stands of oak and beech

Soil carbon dioxide efflux in pure and mixed stands of oak and beech

Biomass increment and carbon balance of ash (Fraxinus excelsior) trees in an experimental stand in northeastern France

Ten years of fluxes and stand growth in a young beech forest at Hesse, North-eastern France

Contact Info

Product

Resources

About

Soil CO2 efflux in a beech forest: dependence on soil temperature and soil water content

Cited by 196 publications

References 13 publications

Soil carbon dioxide efflux in pure and mixed stands of oak and beech

Soil carbon dioxide efflux in pure and mixed stands of oak and beech

Biomass increment and carbon balance of ash (Fraxinus excelsior) trees in an experimental stand in northeastern France

Ten years of fluxes and stand growth in a young beech forest at Hesse, North-eastern France

Contact Info

Product

Resources

About

Soil CO₂ efflux in a beech forest: dependence on soil temperature and soil water content