SBSdk/07 Sxw – Horsetail
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SBSdk/07 Sxw – Horsetail Region: Northern Interior - Prince Rupert Ecologically Acceptable Tree Species Conifers: Sxw Pl Broadleaves: Act At Ep Silvicultural Considerations Relative Tree Species Characteristics: SBSdk Pest Concerns: (appendix D – Forest Health Charts)

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SBSdk/07 Sxw – Horsetail

Region: Northern Interior - Prince Rupert

Ecologically Acceptable Tree Species

Conifers: Sxw Pl

Broadleaves: Act At Ep

Silvicultural Considerations

Relative Tree Species Characteristics:

SBSdk Pest Concerns:

(appendix D – Forest Health Charts)

Site Level: minimize mineral soil exposure to establish seedlings; elevated microsites preferred planting sites (drainage, cold soils, frost); consider cluster planting and reduced stocking; high risk of compaction and windthrow (fine-textured and high water table) and surface erosion (fluvial sites). [Source: p.7-70].

Natural regen potential

Open Shade

High: Act At Ep Pl Med: Pl Sxw

Nutritional requirements

Act > Sxw At Ep > Pl

Productivity

Pl > Sxw

Water table tolerance

Act > Sxw > At Ep Pl

Wind tolerance

Act > At Ep Pl > Sxw

Drought tolerance

Pl > Sxw > At Ep > Act

Vegetation potential:

Very High: Wet Alder and Cottonwood

Frost tolerance

Pl > At Ep > Act Sxw

Snow tolerance

Sxw > Pl Act At Ep

Shade tolerance

Sxw > Pl Act At Ep

Seral Species Relationships:

#

Age (yrs)

Tree Species Notes:

Pl is limited by shade intolerance and saturated soils; Sxw is limited by growing season frosts; Act, At, Ep – limited in productivity, reliability and/or feasibility [Source: PR (LMHB 26); and the Reference Guide for FDP Stocking Standards Footnotes].

Sxw

Pl

At

Act

BGC subzone/variant context:Historical species distribution

Reference Guide to Forest Development Plan Stocking Standards

Tree species Compendium: Sxw Pl Act At Ep


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SBSdk/07 Sxw – Horsetail

Ecologically Acceptable Tree Species: Act At Ep Pl Sxw

Relative Tree Species Characteristics:

Tree Species Ecological Amplitude:

actual soil moisture soil nutrient

VD MD SD F M VM W A B C D E

Act

At

Ep

Pl

Sxw

Natural regen potential

Open Shade

High: Act At Ep Pl Med: Pl Sxw

Nutritional requirements

Act > Sxw At Ep > Pl

Site Index (1st approx.)

Pl = 21

Sxw = 21

Water table tolerance

Act > Sxw > At Ep Pl

Wind tolerance

Act > At Ep Pl > Sxw

Drought tolerance

Pl > Sxw > At Ep > Act

Frost tolerance

Pl > At Ep > Act Sxw

Snow tolerance

Sxw > Pl Act At Ep

Shade tolerance

Sxw > Pl Act At Ep

Fire Tolerance

Pl Sxw > At Ep > Act

Market Value

Tree Species Composition:

Historic 2nd Growth Recommended

Sxw At (Act Pl) Pl (Sxw) Sxw (At Act Pl)

Tree Species Notes:

Pl is limited by shade intolerance and saturated soils; Sxw is limited by growing season frosts; preserve advance regeneration; Act, At, Ep – limited in productivity, reliability and/or feasibility [Source: PR (LMHB 26); and the Reference Guide for FDP Stocking Standards Footnotes].

Silvicultural site considerations: (link to Silvicultural BGC subzone considerations)

Link to Reference Guide to Forest Development Plan Stocking Standards

Additional Tree Species information: Sxw Pl Act At Ep Other


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SBSdk – Sub-Boreal Spruce Dry Cool Biogeoclimatic Subzone

Subzone Notes: Summers in the SBSdk are relatively warm and dry while the winters are typically cold and dry (snowpack < 50cm). The most common tree species include Sxw, Pl, At, Act and Ep. Climax forests are dominated by Sxw however, due to the recurrent disturbances common to this variant many forests are often dominated by Pl and At. Fd and Ep are relatively uncommon but where they do occur they are usually associated with drier sites. Sb is typically restricted to wetlands and Act is most common along rivers and streams in association with Sxw.

Silvicultural Subzone Considerations:

SBSdk Site Series Characteristics:(use site series number to link to site pages)

Tree Species Composition Considerations:

Notes: Future options are based on historic trends in species composition and current landscape concerns. These are intended to be used as guide and are expected to change as new forest management issues arise.

Link to the Reference Guide to Forest Development Plan Stocking Standards

Additional Tree Species Information : Sxw Pl Act At Ep Fd Sb Other species