Government of Nova Scotia gov.ns.ca
gov.ns.ca Government of Nova Scotia Nova Scotia, Canada
Lands and Forestry

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Field Assessment Score Sheet

Old Growth
             
Nova Scotia's Old Growth Forests
Field Assessment Score Sheet

PART I - Species and Age Criteria
> 30 % crown closure, > 50 % of basal area in climax species typical of the landscape and > 30 % of the basal area > 125 years old.
Old Growth

Class 1

> 30 % crown closure, > 50 % of basal area in climax species typical of the landscape and > 30 % of the basal area > 80 years old.
Mature Climax

Class 2

> 30 % crown closure, > 50 % of basal area in climax species typical of the landscape and > 30 % of the basal area < 80 years old.
Immature Climax

Class 3

< 50 % of basal area in climax species typical of the landscape
Non-Climax

Class 4

 
PART II - Stand Composition
- Pick the highest score that applies in each category
- Maximum total score = 100
1. Age of oldest 30 % of the basal area
60 - 80 years Score 5 ____
81 - 100 years Score 10 ____
101 - 125 years Score 20 ____
126 - 175 years Score 30 ____
> 175 years Score 40 ____
 
2. Primal Forest Value
Extensive or recent logging evident Score 0 _____
Light evidence of old partial logging Score 5 - 10 _____
Past logging suspected but not evident Score 10 - 15 _____
Past logging unlikely Score 20 _____
 
3. Diameter of Living Trees
> 50 trees\ha have a diameter > 40 cm Score 3 ____
> 70 trees\ha have a diameter > 40 cm Score 6 ____
> 100 trees\ha have a diameter > 40 cm Score 9 ____
> 20 trees\ha have a diameter > 50 cm Score 12 ____
> 5 trees\ha have a diameter > 60 cm Score 15 ____
 
4. Total Bole Length of Standing and Fallen Dead Trees
400 m with diameter > 20 cm Score 3 ____
200 m with diameter > 30 cm Score 5 ____
200 m with diameter > 40 cm Score 10 ____
200 m with diameter > 50 cm Score 15 ____
 
5. Overstory Crown Closure
Uniform closure with little light penetration Score 2 ____
Uniform closure with a few small canopy openings (hardwood) Score 5 ____
OR  
Mosaic of different densities (softwoods and mixwoods) Score 5 ____
 
6. Stand Structure
One Understory Score 2 ____
Multiple layers in the understory Score 5 ____