Biomass 



Biomass components (foliage, wood larger than 76 mm diameter, and total above- 

 ground biomass) of all trees taller than 1 m are tabulated in appendix III. Past values 

 of these biomass components were calculated for all trees, using the regression equa- 

 tions in appendix II. The results of these calculations for the largest tree on each 

 of the three plots are portrayed in figures 11, 12, and 13. 



Tree #31 on the Green Creek plot (fig. 11), despite its small size in 1860, was 

 about 78 years old at the time. Apparently, it had been suppressed, perhaps by a stand 

 of trees that were removed about that time. If so, it responded favorably to release. 



Tree #29 on the Cattle Trough plot (fig. 12) was about 40 years old in 1860 and 

 showed no evidence of overstory suppression or competition until about 1920 when its 

 growth rate began to decline. Unlike tree #31 at Green Creek, tree #29 's foliage 

 biomass has remained nearly constant during the past 40 years. 



One of the interesting things about tree #31 on the Monte Cristo plot (fig. 13) 

 is its lack of senescence. Its rates of diameter and height growth have not changed 

 appreciably over the past 300 years. Up until the time the tree was measured, its 

 rate of biomass accumulation still tended to increase somewhat, even though it was more 

 than 400 years old. 



Figure 11. — Foliage, wood, and total above-stump biomasses of tree #31 on the Green 

 Creek plot from 1860 to 1977. Foliage biomass is the ovendry mass of needles. Wood 

 biomass is the ovendry mass of wood (bark excluded) larger than 76 mm diameter. 



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