Variable:Dominant Species: Difference between revisions
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{{ForestInputData | |||
|description = Regeneration species or species with largest basal area or stems. | |||
|I_O = Output variable (prognosis) | |||
|type = real | |||
|membership = [[Definition:Treatment unit| Treatment unit]] and [[Definition:Reference unit | Reference unit]] | |||
|unit_values = [[Definition:SpeciesCode | Species group code]] | |||
|database = dbo.Result_ForestData (result database) | |||
}} | |||
==New stands== | ==Usage== | ||
Dominant species is used to determine... | |||
*...what species to include when computing [[Variable:Dominant Height | dominant height]], which is used as input to thinning guide. | |||
*...what species to compute [[Variable:SiteIndexH (SIH)|SiteIndexH]] for. | |||
==Definition== | |||
====New stands==== | |||
Dominant Species: Regeneration species, i.e. the species that was planted. | Dominant Species: Regeneration species, i.e. the species that was planted. | ||
==Existing stands== | ====Existing stands==== | ||
Young stands: Species proportion is computed as proportion of trees. | Young stands: Species proportion is computed as proportion of trees. | ||
Established stands: Species proportion is computed as proprtion of basal area. | Established stands: Species proportion is computed as proprtion of basal area. | ||
Calculation: | |||
If number of conifers >= 500 trees/ha, or sum of conifer proportions >= 50 %, then pine, spruce or contorta is selected as dominant species depending of which is most abundant. Otherwise, if one of oak, beech, or birch >= 50 %, then that one is selected. Otherwise, "other decidouos" is selected, which includes other broad-leafs. | If number of conifers >= 500 trees/ha, or sum of conifer proportions >= 50 %, then pine, spruce or contorta is selected as dominant species depending of which is most abundant. Otherwise, if one of oak, beech, or birch >= 50 %, then that one is selected. Otherwise, "other decidouos" is selected, which includes other broad-leafs. | ||
Latest revision as of 12:09, 1 September 2011
| Name: | Dominant Species |
|---|---|
| Description: | Regeneration species or species with largest basal area or stems. |
| I/O: | Output variable (prognosis) |
| Membership: | Treatment unit and Reference unit |
| Type: | real |
| Unit/values: | Species group code |
| Database table: | dbo.Result_ForestData (result database) |
Usage
Dominant species is used to determine...
- ...what species to include when computing dominant height, which is used as input to thinning guide.
- ...what species to compute SiteIndexH for.
Definition
New stands
Dominant Species: Regeneration species, i.e. the species that was planted.
Existing stands
Young stands: Species proportion is computed as proportion of trees.
Established stands: Species proportion is computed as proprtion of basal area.
Calculation: If number of conifers >= 500 trees/ha, or sum of conifer proportions >= 50 %, then pine, spruce or contorta is selected as dominant species depending of which is most abundant. Otherwise, if one of oak, beech, or birch >= 50 %, then that one is selected. Otherwise, "other decidouos" is selected, which includes other broad-leafs.