Transcript SBSdk/07 Sxw – Horsetail Ecologically Acceptable Tree Species

SBSdk/07 Sxw – Horsetail
Region: Northern Interior Prince Rupert
Ecologically Acceptable Tree Species
Conifers: Sxw Pl
Silvicultural Considerations
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].
Broadleaves: Act At Ep
Relative Tree Species Characteristics:
(appendix D – Forest Health Charts)
Natural regen potential
Open
Shade
High: Act At Ep Pl
Med: Pl Sxw
Nutritional requirements
Act > Sxw At Ep > Pl
Productivity
Water table tolerance
Pl > Sxw
Act > Sxw > At Ep Pl
Wind tolerance
Drought tolerance
Act > At Ep Pl > Sxw
Insects:
Sxw
Pl
root collar weevil
L
L
spruce beetle
L
white pine weevil
M
black army cutworm
M
Pl > Sxw > At Ep > Act
Vegetation potential:
Very High: Wet Alder and Cottonwood
SBSdk Pest Concerns:
Snow tolerance
Shade tolerance
lodgepole pine terminal
weevil
L
Frost tolerance
Pl > At Ep > Act Sxw
Sxw > Pl Act At Ep
Sxw > Pl Act At Ep
mountain pine beetle
L
Seral Species Relationships:
Tree Species Notes:
#
Age (yrs)
At
Ac
t
Sxw
Pl
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].
BGC subzone/variant context: Historical species distribution
Diseases:
Pl
Comandra blister rust
M
Western gall rust
M
Pine dwarf mistletoe
H
Stalactiform blister rust
M
Tomentosus root rot
M
M
Mammals:
Sxw
Pl
Snowshoe hare
L
porcupine
Reference Guide to Forest Development Plan Stocking Standards
Tree species Compendium: Sxw
Pl
Act
At
Ep
Sxw
L
SBSdk/07 Sxw – Horsetail
Ecologically Acceptable Tree Species: Act At Ep Pl Sxw
Relative Tree Species Characteristics:
Natural regen potential
Open
Shade
High: Act At Ep Pl
Med: Pl Sxw
Nutritional requirements
Act > Sxw At Ep > Pl
Tree Species Ecological Amplitude:
actual soil moisture
VD MD SD F M VM W
Site Index (1st approx.)
Pl = 21
Sxw = 21
Water table tolerance
Wind tolerance
Drought tolerance
Frost tolerance
Act > Sxw > At Ep Pl
Act > At Ep Pl > Sxw
Pl > Sxw > At Ep > Act
Pl > At Ep > Act Sxw
Snow tolerance
Shade tolerance
Fire Tolerance
Sxw > Pl Act At Ep
Sxw > Pl Act At Ep
Pl Sxw > At Ep > Act
Market Value
soil nutrient
A B C D E
Act
At
Ep
Pl
Sxw
Tree Species Composition:
Historic
Sxw At (Act Pl)
2nd Growth
Pl (Sxw)
Recommended
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)
Site Limiting Factors
Management Implications
Proposed Management Options
Cold, wet, poorly aerated
fine-textured soils
Root restriction, reduced productivity,
windthrow, soil compaction
Mounding and/or elevated microsites for seedling establishment
Frost/cold air
Seedling damage / mortality
Mounding and/or elevated microsites for seedling establishment; partial
canopy retention
Porcupine
Reduced Pl productivity
Mixed species composition
Pine dwarf mistletoe
Reduced Pl productivity
Mountain Pine Beetle
Reduced Pl productivity; Pl mortality
Mixed species composition
Competing vegetation
Seedling mortality and reduced growth rate
Early planting post-harvest and/or minimize mineral soil exposure
Voles and Hares
Seedling mortality
Link to Reference Guide to Forest Development Plan Stocking Standards
Additional Tree Species information: Sxw
Pl
Act
At
Ep
Other
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:
Subzone Concerns
Identified Risks / Implications
Management Options
2nd growth shift in species composition
Resilience of ecosystems, forest health risks
Adopt appropriate mix of species
Understocking on Pl dry sites
Long term economics (I.e. forest health issues)
Increase Pl density
Climate change – inc. in growing season temp
Reduced Sxw productivity on drier sites
Shift proportions of species mix (introduce Fd)
Increase in MPB in the southern portions
Pl mortality
Overstocking on wet sites
SBSdk Site Series Characteristics:(use site series number to link to site pages)
Tree Species Composition Considerations:
Site series
Number
Site
Old growth
2nd growth
Future options
Dry
Forest
Pl (Fd Sxw)
Pl
Pl (Fd)
Mesic
Forest
Sxw Pl (At Fd)
Pl (Sxw At)
Sxw (Pl At Fd)
Wet
Forest
Act Sb (Sxw)
Sb Act Sxw
Act Sb (Act)
Frost / Cold
Air
High Water
table
Moisture
Deficit
Nutrient
Deficit
Root Restriction
Subzone
Presence
01
Some sites
Some sites
Fine-textures
30%
02/03
Severe
Severe
Shallow soils
15% (less 02)
04
Common
shallow soils
5%
05
Common
Fine-textures
8%
Fine-textures
12%
06
Common
07
Y
Y
Fine-textures
5
08
Y
Y
High water table
8
09
Y
Y
High water table
5
10
Y
Y
High water table
12
Link to the Reference Guide to Forest Development Plan Stocking Standards
Additional Tree Species Information : Sxw
Pl
Act
At
Ep
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.
Fd
Sb
Other species