Table 4. Allocation coefficients to leaf biomass, structural biomass, and root biomass for the studied species according to the shading treatment at date 9.

Species	Biomass compartment	shading		Final model r2
		L	S
Bridelia ferruginea	leaf	0.359	0.283	0.995
	stem	0.308	0.258	0.986
	root	0.330	0.432	0.993
	sum	0.997	0.973
Ceiba pentandra	leaf	0.177	0.177	0.942
	stem	0.575	0.575	0.989
	root	0.263	0.236	0.994
	sum	1.015	0.988
Cynometra megalophylla	leaf	0.249	0.249	0.987
	stem	0.386	0.386	0.995
	root	0.349	0.349	0.990
	sum	0.984	0.984
Piliostigma thonningii	leaf	0.396	0.275	0.989
	stem	0.266	0.219	0.993
	root	0.437	0.356	0.994
	sum	1.099	0.850

Shading, L (light) and S (shade). Coefficients computed as slopes of regressions (forced through the origin) between increase in biomass compartments and increase in total biomass between dates 3 and 9. All coefficients are significant at the 5% level. Regression models were simplified until all remaining effects were significantly different from each other (equal coefficients were merged into a single coefficient). The sum of the three coefficients should be equal to 1, however since they were estimated as regression coefficients there was no such constraint put on their estimation: we provide the sum as an assessment of the estimate quality.