Appendix G Successional Pathways

APPENDIX G

SUCCESSIONAL PATHWAYS

shrubs and III

Code ScientificName Common Name

ACMA Acer macrophyllum Bigleaf maple ALRU Alnus rubra Red alder ARME Arbutus menziesii Madrone CACH Castanopsis chr\jsophylla Chinquapin PISI 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 shallon 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

Successional Vegetation Models By Disturbance Regimes 5 & 6 .. __ .... _ Vegetation Grouping: Siuslaw Plant Assoc.

_1,-,,1"· WET TSHE/RUSP _1 ...... ·lrlrO':.JI,."r.� ... Charactoristic mortality) TSHE/RUSP-GASH (300 yrs) TSHE/RUSP-ACCI (100,000 acres +) TSHE/OPHO

on or near a

_�._.�_. ______.. _ .�_ ___••••• �_.___ ._�___ ,_ � of disturbances or varying s ve ity· will siarlificantllvI ...... j' rrc>,rn.<>".-" e r understory veg and regenl these static rli",tlirh::lcnc,�� in the system. A 71 to 150 151

ALRU I TSHE-THPL* TSHE - THPL I ALRU PSME' ALRU PSME TSHE - ALRU

General gaps Scattered ALRU, clumps

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. Successional Vegetation Models By Disturbance Regimes

DISTURBANCE REGIME 8 Vegetation Grouping: Siuslaw Plant M��V,"". Disturbance Block Charactoristics DRY TSHE/RHMA et al Severity (30 - 70% mort) Assuming NO Disturbance TSHENAOV2

OW-MOO Frequency (100-300 yrs) TSHE/GASH TSHE/BENE

Age Since Maior Disturbance

11 to 70 '71 to 150 151 •

Dominent Tree

Species �--�-��-�---�''i:��/TSHE

General ---� Moderate to High Moderate -�-. ..

layering Regen --.------'--.. TSHE THPL' AHME, CACH ----- 1 . .. ITSHE I THPt increasing

Ground increasing moderate Stable I Successional Vegetation Models By Disturbance Regimes r------.------�------�------�------_i DISTURBANCE REGIME 5 & 6 Vegetation (;rouping" Siuslaw Plant Assoc. Disturbance Block Charactoristic MOIST TSHE/POMU

* High Severity (>10% mortality) TSHE/OXOR

* Low Frequency (300 yrs) TSHE/ACCIIPOMU

* Giant Size (100,000 acres +) TSHE/ACCI/GASH

�----.------�------�------�------succession were developed for each environment by using inventory information and field observations.

Age Since Major Disturbance o to 10 11 to 70 I 71 to 150 151 - 300

Dominent Tree PSME PSME PSMEI TSHE PSME/AlRU PSME PSMEI TSHE

(Stem Exclusion Phase)

� __�=�� moderate

__ =-______�______. ______L- ______-+ ______-+ � ------�

Increased frequency Scattered AlRU, TSHE, THPL, ACMA ------+------�------

Ground "'1-'<:;;''''<;;;;:) decreases Greater diversity of species High diversity of

Moderate Cover \I�r·I�"'IQ

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. Successional Vegetation Models By Disturbance Regimes

DISTURBANCE REGIME 5 & 6 Vegetation Grouping: Siuslaw Plant .n-.,<;;IIV'-" _ _ I.r ...... n�::lInr'g Block Characteristics DRY al 11 u:_'"- Severity (>70% mortality) Frequency (300 yrs) TSHE/GASH (100,000 acres) ITSHE/BENE et al

Age Since Major Disturbance 11 to 70 71 to 150 151 - 300

UUlmllnF'nr Tree PSME PSME/TSHE

Moderate to Moderate

I * I L inNQ�einn ��-"�"��" ..... Scattered TSHE THPL TSHE THP

Cover moderate Stable Successional Vegetation Models By Disturbance Regimes

DISTURBANCE REGIME 8 Vegetation Grouping: Siuslaw Plant Assoc. Disturbance Block Characteristics WET TSHE/RUSP

Mod-High Severity (30 - 70% mort) Low-Mod Frequency (100-300 yrs) Variable size

Age Since Major Disturbance

11 to 70 71 to 150 151 •

Tree ALRU I TSHE-THPL* TSHE-THPL AlRU PSME I ALRU PSME-TSHE-

gaps Scattered ALRU, clumps Mod. stocking PSME, ALRU, ACMA

_ayering Regen Tshe, ACM Scattered �.. -�- � . moderate layering f,\ � - ....----- .. ... scattered density

greater diversity of

-�-- ...... moderatly stable cover I Successional Vegetation Models By Disturbance Regimes REGIME 8 Vegetation Grouping: ISiuslaw Plant MOIST Assuming Disturbance

Sinc� lVIi:ljor Disturbance 71 to 150 Post Disturbance 150 300

------""------.,.

Moderate Low Moderate

Two age PSME. Multiage layering of shade species after dist. tolerant species

Ground Cover I Successional Vegetation Models By Disturbance Regimes 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 150 151 -

Dominent Tree PSME PSME Species PSME I ACMA I TSHE PSME I TSHE

General Density ---�-� increasing

TSHE, scattered clomps of alder and ACMA Increased fre,aw�nc:v

Scattered TSHE, THPL �

species decrt:;!ases Greater diversity of speciE�s High

Moderate Cover Variable

vs TSHElTHPL dominance. I Successional Vegetation Models By Disturbance Regimes

DISTURBANCE REGIME 8 Vegetation Grouping: ISiuslaw Assoc. Disturbance Block Characteristics DRY Mod-High Severity (30 - 70% mort) Assuming Disturbance ow-Mod Frequency (100-300 yrs) Variable size

Age Since Major Disturbance

150 Post Disturbance 150 - 300

PSME Species

General Moderate to High

Layering Regen CACH age PSME. Less survival moist areas Two age PSME; Multi layering of ;'-;n'fnln!mn from ARME & eACH shade tolerant species

are so come back fast Higher

and no disturbance regimes are: