APPENDIX G SUCCESSIONAL PATHWAYS

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Transcript of APPENDIX G SUCCESSIONAL PATHWAYS

ARME Arbutus menziesii Madrone
PIS I Picea sitchensis Sitka spruce
PSME Pseudotsuga menziesii Douglas-fir THPL Thuja plicata Western redcedar TSHE Tsuga heterophylla Western hemlock
Shrubs
ACCI Acer circinatum Vine maple BENE Berberis nervosa Dwarf Oregon grape
COC02 Corylus cornuta California hazel
GASH Gaultheria shall on Salal HODI Holodiscus discolor Ocean-spray
Menziesia Fool's huckleberry OPHO Oplopanax horridum Devil's club RHMA Rhododendron Pacific rhododendron
Rubus Salmonberry VAOV2 Vaccinium ovatum Evergreen huckleberry
Herbs/Ferns
General
.. __ .... _ 5 & 6
TSHE/RUSP
TSHE/RUSP-GASH
TSHE/RUSP-ACCI
TSHE/OPHO
_._._. ____ . __ ... _ ._ . ___ ••••• _. ___ ._ ___ ,_ ... j' rrc>,rn .<>".-" of disturbances or varying severity· will siarlificantllv I
A
gaps
understory veg and regenl these static rli",tlirh::lcnc, in the system.
71 to 150
ALRU I TSHE-THPL*
Scatterd PSME, moderate canopy closure-----.--.. -
.-.--.----,.-----.,.-,--.. -,.-.-.- - ..... moderate - variable,
scattered density
pre1l0rrllnantly alder to disturbances. In areas a mix of alder and Douglas-fir, UULlu.",,,,-m will eventually
disturblllnce neauem;,'V and severity. a high frequency of sevar disturbances· exposed bare soil from slides andlof flooding
shade intoterance.)
00 some what of a random occurrence, dependant on seed source. Mixed Alder! Douglas-fir stands develop a two story effect.
Dominent Tree
Severity (30 - 70% mort) OW-MOO Frequency (100-300 yrs)
Vegetation Grouping: DRY
Assuming NO Disturbance
Age Since Maior Disturbance 11 to 70
---
increasing moderate
DISTURBANCE REGIME 5 & 6 Disturbance Block Charactoristic * High Severity (>10% mortality) * Low Frequency (300 yrs) * Giant Size (100,000 acres +)
Vegetation (;rouping" Siuslaw Plant Assoc. MOIST TSHE/POMU
TSHE/OXOR TSHE/ACCIIPOMU TSHE/ACCI/GASH
----.--------------------------------------------------------------------------- succession were developed for each environment by using inventory information and field observations.
o to 10 Age Since Major Disturbance
PSME
PSME/AlRU
Moderate
tolerant species are introduced and have had time to
Dense stands of OF go through stem exclusion phase· significant in
eXCllJSIOn phase then high again.
High diversity of
UUlmllnF'nr Tree
DISTURBANCE REGIME 5 & 6 Vegetation Grouping: Siuslaw Plant .n-.,<;;IIV'-" _
_ ............ I.rn::lInr'g Block Characteristics DRY al 11 u:_'"- Severity (>70% mortality)
Frequency (300 yrs) I TSHE/GASH
(100,000 acres) TSHE/BENE et al
Age Since Major Disturbance 11 to 70 71 to 150
Moderate to
moderate
Stable
Tree
DISTURBANCE REGIME 8 Disturbance Block Characteristics Mod-High Severity (30 - 70% mort) Low-Mod Frequency (100-300 yrs) Variable size
Vegetation Grouping: WET
gaps
- .... ----- .. . . -- . ...
--- .... ...
Assuming Disturbance
Moderate Low
tolerant species
Dominent Tree
DISTURBANCE REGIME 8 Vegetation Grouping: ISiuslaw Disturbance Block Characteristics MOIST
Severity (30 - 70%, mort) Assuming NC) Disturbance Low-Mod Frequency (100-300 yrs) Variable size
Age Since Major Disturbance to 70 71 to 150
PSME
I ,
PSME
151 -
increasing
TSHE, scattered clomps of alder and ACMA Increased fre,awnc:v
Scattered TSHE, THPL
Moderate Cover Variable
vs TSHElTHPL dominance.
CACH
ow-Mod Frequency (100-300 yrs) Variable size
Age Since Major Disturbance 150 Post Disturbance
PSME
age PSME. Less survival moist areas ;'-;n'fnln!mn from ARME & eACH
are so come back fast
and no disturbance regimes are:
150 - 300
shade tolerant species