Figure 9. Papyrus carbon budget. (i) Gross canopy assimilation predicted by model. (ii) Canopy respiration predicted by scaling measured values. (iii) Net assimilation comprising predicted gross assimilation minus canopy respiration. (iv) Measured above ground productivity (Muthuri et al. 1989). (v) Below ground productivity derived from net assimilation minus above ground productivity. (vi) Detritus decomposition derived from total detritus C flux minus measured and scaled root/rhizome respiration. (vii) Scaled measurement of root/rhizome respiration. (viii) Scaled detritus C flux from soil respiration chamber measurements. (ix) Ecosystem C efflux estimated from eddy covariance measurements. Values given are expressed in terms of C.