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Forest Inventory Tree Species Composition
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Species composition describes what species are present in a stand and their abundance and distribution.
Species composition can be expressed as:
Species composition can be expressed as:
- the percentage of the number of stems,
- percentage of the basal area,
- percentage of growing stock
EXAMPLE 1: Species Composition in Goettingen Forest, Germany
"More than half (51.9%) of the sample observed in Goettingen forest is Fagus sylvatica, approximately 13.4% is Acer platanoides, 10% is Fraxinus excelsior, 7.4% is Acer pseudoplatanus, and the rest is composed of other species in smaller quantities."
(Source: Tropical & International Forestry (2020). Stadtwald Goettingen: Forest Management Plan 2022-2031. Goettingen.)
"More than half (51.9%) of the sample observed in Goettingen forest is Fagus sylvatica, approximately 13.4% is Acer platanoides, 10% is Fraxinus excelsior, 7.4% is Acer pseudoplatanus, and the rest is composed of other species in smaller quantities."
(Source: Tropical & International Forestry (2020). Stadtwald Goettingen: Forest Management Plan 2022-2031. Goettingen.)
EXAMPLE 2: Species Composition in a mixed forest stand, New Brunswick, Canada
"Beech (Fagus grandifolia) makes up 43% of the species, in terms of number of stems, but only 22% of the basal area and 16% of the volume. Red spruce (Picea rubrum), on the other hand, makes up only 2% of the species, in terms of number of stems, but 12% of the basal area and 14% of the volume."
(Source: Kershaw, J. A., Ducey M. J., Beers T. W., Husch, B., (2017). Forest Mensuration 5th Edition. Chichester,UK.)
"Beech (Fagus grandifolia) makes up 43% of the species, in terms of number of stems, but only 22% of the basal area and 16% of the volume. Red spruce (Picea rubrum), on the other hand, makes up only 2% of the species, in terms of number of stems, but 12% of the basal area and 14% of the volume."
(Source: Kershaw, J. A., Ducey M. J., Beers T. W., Husch, B., (2017). Forest Mensuration 5th Edition. Chichester,UK.)