The integration of stable isotope methods into studies of woody plant carbon and water relations [Acer negundo, Acer rubrum, Acer saccharum]

acer negundo acer rubrum acer saccharum alberi analytical methods arbre canopy carbon carbone carbonio carbono chioma fogliare costi costos costs couvert cubierta de copas feuille fisiologia vegetal fisiologia vegetale foglie fotosintesi gas exchange hojas hydrogen idrogeno intercambio de gases isotope isotopes isotopi leaves metodi analitici photosynthese photosynthesis plant physiology plant water relations relaciones planta agua relation plante eau relazioni pianta-acqua scambio gassoso technique analytique trees