Table 4 ANOVA tables for mixed models to compare daily average of sap flux (F _H2O, L day⁻¹), dissolved [CO₂ ^*] at the base of the stem ([CO₂ ^*]_base, mmol L⁻¹), internal flux of CO₂ dissolved in xylem sap (F _T, mmol CO₂ day⁻¹), of Q. pyrenaica stems among large and small clones (class variable); and modeled soil CO₂ efflux (F _S16, μmol m⁻² s⁻¹) and root respiration that diffused through soil to the atmosphere (F _S16-root, mmol stem⁻¹ day⁻¹) among clonal extension (quantitative variable, m²)

From: Xylem and soil CO₂ fluxes in a Quercus pyrenaica Willd. coppice: root respiration increases with clonal size