Fig. 5.

Daily estimates of GPP (in g C m⁻² ground d⁻¹) for (A) sunny and (B) overcast conditions in mid-July as a function of LAI. Simulations were run for a range of canopy nitrogen contents, N_tot (in mmol N m⁻² ground), represented by the lines. The black squares correspond to the GPP estimates obtained with the LAI–N_tot combinations of the seven alpine plant communities studied. Numbers above the squares as in Fig. 3.