Q-2, r. 35.3.1 - Regulation respecting afforestation and reforestation projects eligible for the issuance of offset credits on privately-owned land

Section 29 Disposition versions

2022-12-29

29. Data gathering for an inventory of the carbon reservoirs in living aerial biomass and dead biomass must comply with the procedure set out in Tables 4, 5 and 6.

Table 4 – Variables to be measured for the inventory of carbon reservoirs of living aerial biomass

Variable	When measured	Data gathered	Threshold to be respected for data gathering	Data acquisition method
Regeneration	Initial inventory	• Distribution coefficient	Height > 30 cm	Field inventory
		• Species		Groups of sample plots
Trees	Initial inventory	• Species	Height > 1.3 m	Field inventory
	Issuance inventory	• Number		Variable-radius plot
		• DBH class (2 cm classes)	DBH (1.3 m)	Biomass Shrub: Schedule B
		• Height	DSH (15 cm from ground)
		• Basal area
Shrubs	Initial inventory	• Number	Height < 1.3 m	Field inventory
		• DSH class (2 cm class)	DSH (15 cm from ground) (2 cm class)	Groups of sample plots
		• Species		Biomass Shrub: Schedule B
Grasses, mosses, seedlings and shrubs of less than 1.3 m	Initial inventory	Cover class (0-25%, 25-50%, 50-75%, 75-100%) – all heights combined	Height < 1.3 m	Field inventory
			Height < 50 cm by 25 cm class	Groups of plots
				Default value for 100% cover
				7.5 tonnes anhydrous biomass/ha
				To be multiplied by actual herbaceous cover (ha)

Table 5 – Variables to be measured for the inventory of carbon reservoirs of dead biomass

Variable	When measured	Data gathered	Threshold to be respected for data gathering	Data acquisition method
Woody debris and snags	Initial inventory	Species	Snag: Height > 1.3 m	Field inventory
	Issuance inventory	Number		Variable-radius plot to measure snags caught by the prism
		Snags: DBH		Decomposition class:
		Woody debris: average diameter; length	Woody debris: Diameter > 9 cm diameter class	1. Tree that died recently with twigs but without needles/leaves
		Decomposition class		2. Tree without twigs but with branches
		At the initial inventory, snags must be marked but not measured		3. Tree with large branches only
		At the issuance inventory, only unmarked snags and woody debris must be measured		4. Snag without branches
				Woody debris: measurement taken within the variable-radius plot delimited by the last tree caught by the prism

Table 6 – DBH classes for the inventory of carbon reservoirs of living aerial biomass and dead biomass

DBH class	DBH value
2	1 < DBH ≤ 3 cm
4	3 < DBH ≤ 5 cm
6	5 < DBH ≤ 7 cm
8	7 < DBH ≤ 9 cm
10	9 < DBH ≤ 11 cm
...	… < DBH ≤ … cm

M.O. 2022-11-17, s. 29.

Not in force

In force: 2022-12-29

29. Data gathering for an inventory of the carbon reservoirs in living aerial biomass and dead biomass must comply with the procedure set out in Tables 4, 5 and 6.

Table 4 – Variables to be measured for the inventory of carbon reservoirs of living aerial biomass

Variable	When measured	Data gathered	Threshold to be respected for data gathering	Data acquisition method
Regeneration	Initial inventory	• Distribution coefficient	Height > 30 cm	Field inventory
		• Species		Groups of sample plots
Trees	Initial inventory	• Species	Height > 1.3 m	Field inventory
	Issuance inventory	• Number		Variable-radius plot
		• DBH class (2 cm classes)	DBH (1.3 m)	Biomass Shrub: Schedule B
		• Height	DSH (15 cm from ground)
		• Basal area
Shrubs	Initial inventory	• Number	Height < 1.3 m	Field inventory
		• DSH class (2 cm class)	DSH (15 cm from ground) (2 cm class)	Groups of sample plots
		• Species		Biomass Shrub: Schedule B
Grasses, mosses, seedlings and shrubs of less than 1.3 m	Initial inventory	Cover class (0-25%, 25-50%, 50-75%, 75-100%) – all heights combined	Height < 1.3 m	Field inventory
			Height < 50 cm by 25 cm class	Groups of plots
				Default value for 100% cover
				7.5 tonnes anhydrous biomass/ha
				To be multiplied by actual herbaceous cover (ha)

Table 5 – Variables to be measured for the inventory of carbon reservoirs of dead biomass

Variable	When measured	Data gathered	Threshold to be respected for data gathering	Data acquisition method
Woody debris and snags	Initial inventory	Species	Snag: Height > 1.3 m	Field inventory
	Issuance inventory	Number		Variable-radius plot to measure snags caught by the prism
		Snags: DBH		Decomposition class:
		Woody debris: average diameter; length	Woody debris: Diameter > 9 cm diameter class	1. Tree that died recently with twigs but without needles/leaves
		Decomposition class		2. Tree without twigs but with branches
		At the initial inventory, snags must be marked but not measured		3. Tree with large branches only
		At the issuance inventory, only unmarked snags and woody debris must be measured		4. Snag without branches
				Woody debris: measurement taken within the variable-radius plot delimited by the last tree caught by the prism

Table 6 – DBH classes for the inventory of carbon reservoirs of living aerial biomass and dead biomass

DBH class	DBH value
2	1 < DBH ≤ 3 cm
4	3 < DBH ≤ 5 cm
6	5 < DBH ≤ 7 cm
8	7 < DBH ≤ 9 cm
10	9 < DBH ≤ 11 cm
...	… < DBH ≤ … cm

M.O. 2022-11-17, s. 29.