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Fig. 1. Mean 
13C values of leaves in the upper canopy trees (UCT), lower canopy trees (LCT), shrub (S), and grass/herb layer (GH) and in grasses and fine litterfall of a native Cerrado (CE), in needles and fine litterfall of Pinus caribaea Morelet stands (PI), and in grasses of pure-grass Brachiaria decumbens Stapf pastures (PP). Mean 13C values are shown separately for two rainy (RS) and dry seasons (DS). The error bars show standard deviations of the three replicate plots of the native and land-use systems for needles and litterfall, of the various sampled tree and shrub species sampled at one Cerrado site for leaves, and of the six biomass harvests at the three replicate pasture plots for pasture grasses. (Those not showing bars have standard deviations smaller than the symbols.)
