Microclimate and fluxes of water vapour, sensible heat and carbon dioxide in structurally differing subalpine plant communities in the Central Caucasus

alpine grasslands canopy carbon dioxide comunidades vegetales couvert cubierta de copas dioxyde de carbone energy balance feuille grasslands herbage hojas leaf area leaf area index leaves meadows microclima microclimat microclimate photosynthese photosynthesis plant communities praderas praderas alpinas prados de siega prairie alpine prairie de fauche superficie foliar surface foliaire temperatura temperature thermal properties vapeur d'eau vapor de agua vegetation water vapour