Sobrado, M.A., and J.R. Ehleringer. 1997. Leaf carbon isotope ratios from a tropical dry forest in Venezuela. Flora 192:121-124.

Leaf carbon isotope ratios were measured on dominant deciduous-leaved and evergreen-leaved species in a seasonally dry tropical forest in Venezuela. Carbon isotope ratios were higher and the intercellular to ambient CO2 concentrations were lower in the deciduous leaved species. Associated with this are predicted lower water-use efficiencies in evergreen-leaved than in deciduous-leaved species. Predawn water potentials were more positive in evergreen-leaved species, leading to a negative correlation between leaf carbon isotope ratio values and predawn water potential among the different species.