in a Douglas Fir Tree n this exercise, you wil c cted roe easily thods connects

Question

in a Douglas Fir Tree n this exercise, you wil c cted roe easily thods connects the diameter of the tree biomasts biomass wibtes that are er ot breast height to the biomass is where · · . B is the above-ground biomass, measured in grams is the trunk diameter, at breast-height. measured in centimeters For a Douglas Fir tree y4SS and m-aas: these are values that relate the above- ground biomass to the diameter of the trunk Breast height diameter is measured approximately where you would give the tree a hug. We will use a breast height diameter of 20Dcm, a common ci Douglas fir rcumference for a 100+ year old The amount of carbon stored in the tree can be estimated from the biomass: . The mass of carbon stored in the above-ground portion of the tree, for most tree species, is 50% of the biomass, B. The amount of carbon Remember: the relationship between circumference (C) and diameter (d) i in the roots (below-ground) is "25% of the above- ground biomass, B . . Calculate the total weight of carbon stored in this Douglas fir by filling in the table below Please use the space below the table to show your calculations. (15 points) 1. Above- ground Below- ground Total carbon Tree Tree circumference: diameter: dbh 8 (8) 3 pts carbon (g) 3 carbon (8)3 (8) 4 pts cm (cm) 2 pts pts 200 cm 2.21 C (200)

Explanation / Answer

We know that circumfrence = C = piD
thus Diameter of tree = C/pi = 200/3.14 = 63.6363 cm
thus Breast height diameter dbh = 63.6363cm

Now given B = ev dbhw
Thus B = e4.58 (63.6363)2.26 = 97.514*11922.66 = 1162626.26 gm
above ground carbon = 50% of (1162626.26)= 581313.13 gm
below grount carbon = 25% of (1162626.26) = 290656.5 gm
thus total carbon = 581313.13 gm+ 290656.5 gm= 871969.7 gm

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