SBSdk/07 Sxw – Horsetail

1. 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

2. 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

3. 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