## _Carbon Sequestering Calculations

_

Ratio of root biomass to above ground biomass:

Angiosperms 25% Gymnosperms 26%

Step 1 Select the plot of trees to be analyzed for carbon sequestering rates.

Step 2 Record the diameters of all trees in the plot and select a subset for sampling height and age by taking core samples of trees from representative diameters for each species. Calculate the age of the sample trees using the dendrochronology protocols.

Step 3 Develop a journal recording sheet and enter the data in the attached spreadsheet (given below) that permits a calculation of carbon sequestered for your plot.

Step 4 Enter the DBH or the DBH and height into the CFS biomass calculator. Enter the dry biomass for bark, branches, foliage and stem into the spreadsheet along with the age, or age estimate. The spreadsheet will calculate and add the dry root to find the net tree dry biomass.

Step 5 The spreadsheet will calculate the net carbon sequestered of each tree by multiplying the total dry biomass by 50%. This is the amount of carbon found in the tree's biomass.

Step 6 The spreadsheet will calculate the rate of carbon sequestering by dividing the net carbon stored in the selected trees by the age of the tree.

Step 7 The spreadsheet below will then calculate the carbon sequestered in each plot by taking the sum of all the tree carbon within the plot.

Click on the file below to get the spreadsheet that calculates the total; carbon sequestered in a tree.

**Overview**: Carbon sequestering studies focus on current research and bring research techniques into the classroom. Students collect tree data in representative plots. They take core samples to determine the age of selected trees within the plot. They then use the tree data with the Canadian Forest Services website (https://apps-scf-cfs.rncan.gc.ca/calc/en/calculateur-calculator) to calculate the above ground dry biomass. The root biomass of the tree is then added to the tree biomass to give the tree's net dry biomass. This gives both the rate at which an individual tree sequesters carbon and the rate at which the plot sequesters carbon. With this information, students are able to quantify the extent to which trees and forests contribute to offsetting their carbon footprint.**Plot selection**:: The Canadian GLOBE Forestry Studies are based on comprehensive studies of a forest outlined by Dan Farr (forest ecologist with the Hinton Environment School and the Alberta Prescribed Manual). The Canadian GLOBE Forestry Studies centers on conducting a number of studies in 20 meter by 10 meter plots distributed along a 100 meter baseline. This baseline should be set out in an east-west orientation running through a uniform sample of surrounding forest. The study plots run perpendicular to the base line. The five 20- meter lines are then set out perpendicular to the base line, one each at 10 m, 30 m, 50 m, 70 m and 90 m along the base line. The study area is defined as 5 meters either side of the 20 meter plot line. The 20 meter line serves as a transect line for canopy closure studies, for coarse and fine woody debris studies, for ground cover plots and for soil pit studies. All trees within 5 meters of either side of the 20 meter plot line are included in the study area.**Tree measurements**: Students identify the species and DBH of all the trees within the plot. They then measure the height and age of the sample trees of each species within the plot. Details on how to measure trees are provided under the tree measurement section of the forestry studies.*Identifying the trees*: Use a Regional Tree Identification book to identify the type of tree you are studying. There will be a number of trees of the same species in your plot. For example, white and black spruce, lodgepole pine , balsam popular, paper birch and trembling aspen are the most common species found in the Boreal Forest Eco-regions.**Biomass Calculations:**The Canadian Forest Services provides an online calculator that can be used to estimate the biomass mass of 41 indigenous forest tree species of Canada. The biomass equations provide estimates of bark, stem, branches and foliage, as a function of DBH and height. The analysis has been carried out so that the sum of the components gives an estimate of the total above-ground biomass. The underlying equations have been adjusted on thousands of trees that have been sampled across Canada as part of a research program on forest biomass carried out in the early 1980's. The equations are applicable across all of Canada. The trees were sampled in forested environments, and not in open or urban settings where trees can present different geometries. Apply the collected information to the Canadian Forest Services website that calculates the above ground dry biomass of the trees surveyed. Calculate and add the dry root biomass to the above ground dry biomass to find the net tree dry biomass. Determine the ages of trees across both species and size using dendrochronology. Apply these ages to similar species and sizes of trees. You are able to calculate the average annual rate of carbon sequestering using this data.**Estimations for root biomass are shown as a ratio of root biomass compared to the biomass of the above ground portion of the tree. These ratios are based on numerous samples taken throughout Canada. Students use the CFS biomass above ground calculator, calculate the root biomass, then add the two masses.**

Carbon Sequestering calculations:Carbon Sequestering calculations:

Ratio of root biomass to above ground biomass:

Angiosperms 25% Gymnosperms 26%

**Calculations Procedures**Step 1 Select the plot of trees to be analyzed for carbon sequestering rates.

Step 2 Record the diameters of all trees in the plot and select a subset for sampling height and age by taking core samples of trees from representative diameters for each species. Calculate the age of the sample trees using the dendrochronology protocols.

Step 3 Develop a journal recording sheet and enter the data in the attached spreadsheet (given below) that permits a calculation of carbon sequestered for your plot.

Step 4 Enter the DBH or the DBH and height into the CFS biomass calculator. Enter the dry biomass for bark, branches, foliage and stem into the spreadsheet along with the age, or age estimate. The spreadsheet will calculate and add the dry root to find the net tree dry biomass.

Step 5 The spreadsheet will calculate the net carbon sequestered of each tree by multiplying the total dry biomass by 50%. This is the amount of carbon found in the tree's biomass.

Step 6 The spreadsheet will calculate the rate of carbon sequestering by dividing the net carbon stored in the selected trees by the age of the tree.

Step 7 The spreadsheet below will then calculate the carbon sequestered in each plot by taking the sum of all the tree carbon within the plot.

Click on the file below to get the spreadsheet that calculates the total; carbon sequestered in a tree.

tree_carbon_storage.xlsx | |

File Size: | 9 kb |

File Type: | xlsx |