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Classification
Scientific Name: Mediterranean California Mesic Mixed Conifer Forest and Woodland
Unique Identifier: CES206.915
Classification Confidence: 2 - Moderate

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Summary: This ecological system occurs in cool ravines and north-facing slopes (typically with 100-150 cm annual precipitation; 50% as snow). It is found from 800-1000 m (2400-3000 feet) elevation in the Sierra Nevada and 1250-2200 m (3800-6700 feet) in the Klamath Mountains. The most characteristically co-occurring conifers are Abies lowiana, Calocedrus decurrens, and Pinus lambertiana. Pinus jeffreyi, Pinus ponderosa, and Pseudotsuga menziesii occur frequently but are not dominant. In limited locations in the central Sierra Nevada, Sequoiadendron giganteum dominates, usually with Abies lowiana, and at the highest elevations also with Abies magnifica. Acer macrophyllum is common in lower elevation mesic pockets; Chrysolepis chrysophylla also occurs in the western Klamaths. Common understory species include Corylus cornuta, Cornus nuttallii, and at higher elevations Chrysolepis sempervirens. In areas of recent fire or other disturbance, Arctostaphylos patula, Ceanothus integerrimus, Ceanothus cordulatus, Ceanothus parvifolius, and Ribes spp. are more common. Fire of highly variable patch size and return interval maintains the structure of these woodlands

Classification Approach: International Terrestrial Ecological Systems Classification (ITESC)

Classification Comments: The presence of Abies lowiana with other conifers is a strong indicator for this system in central California's Coast and Transverse ranges.

Similar Ecological Systems
Unique Identifier Name
CES204.101 Sierran-Intermontane Desert Western White Pine-White Fir Woodland
CES206.916 Mediterranean California Dry-Mesic Mixed Conifer Forest and Woodland


Component Associations
Association Unique ID Association Name
CEGL000014 Abies lowiana - Pinus ponderosa / Amelanchier alnifolia Forest
CEGL003108 Sequoiadendron giganteum Forest
CEGL003155 Abies lowiana - Pinus lambertiana - Pinus jeffreyi / Sparse Understory Forest
CEGL008607 Sequoiadendron giganteum - Pinus lambertiana / Cornus nuttallii Forest
CEGL008608 Abies lowiana / Ceanothus cordulatus Forest
CEGL008630 Pinus jeffreyi - Abies lowiana Woodland
CEGL008632 Pinus jeffreyi - Abies magnifica Woodland
CEGL008675 Abies lowiana - Calocedrus decurrens - Pinus lambertiana / Chrysolepis sempervirens / Carex multicaulis Forest
CEGL008676 Abies lowiana - Pinus lambertiana - Calocedrus decurrens / Symphoricarpos mollis / Kelloggia galioides Forest
CEGL008677 Abies lowiana - Calocedrus decurrens - Pinus lambertiana / Cornus nuttallii / Corylus cornuta var. californica Forest
CEGL008678 Abies lowiana - Calocedrus decurrens - Pinus lambertiana / Adenocaulon bicolor Forest
CEGL008679 Abies lowiana - Pinus lambertiana Forest
CEGL008680 Abies lowiana - Pinus lambertiana / Maianthemum racemosum - Prosartes hookeri Forest



Classifiers

Land Cover Class: Forest and Woodland
Spatial Pattern: Matrix
Natural/Seminatural: No
Vegetated ( > 10% vascular cover):
Upland: Yes
Wetland: No
Isolated Wetland: No

Diagnostic Classifiers
Primary Classifier Secondary Classifier
Montane Lower Montane
Toeslope/Valley Bottom  
Mediterranean Mediterranean Xeric-Oceanic
Udic  

Non-diagnostic Classifiers
Primary Classifier Secondary Classifier
Forest and Woodland (Treed)  
F-Patch/Low Intensity  
Sequoiadendron giganteum  
Long (>500 yrs) Persistence  

At-Risk Species Reported for this Ecological System
Scientific Name
  (Common Name)
NatureServe Global Status U.S. Endangered Species Act Status
Ceanothus parvifolius
  (Littleleaf Whitethorn)
G3?  
Chloealtis aspasma
  (Siskiyou Chloealtis Grasshopper)
G1  
Kalmiopsis fragrans
  (North Umpqua Kalmiopsis)
G2  
Monadenia chaceana
  (Siskiyou Shoulderband)
G2G3  
Monadenia fidelis celeuthia
  (Pacific Sideband)
G4G5T1  
Monadenia fidelis ssp. 2
  (Umpqua Sideband)
G4G5T1  
Perideridia erythrorhiza
  (Red-root Yampah)
G2  
Polites mardon
  (Mardon Skipper)
G2G3  
Pristiloma johnsoni
  (Broadwhorl Tightcoil Snail)
G3  
Prophysaon sp. 1
  (a terrestrial slug)
G2  
Ramaria coulterae
  (a fungus)
G2G3  
Ramaria rubribrunnescens
  (a fungus)
G2G3  
Rana pretiosa
  (Oregon Spotted Frog)
G2 LT: Listed threatened
Rhizopogon atroviolaceus
  (a fungus)
G2G3  
Rhizopogon brunneiniger
  (a fungus)
G2G3  
Rubroboletus pulcherrimus
  (Red-pored Bolete)
G3  
Sequoiadendron giganteum
  (Giant Sequoia)
G3G4  
Taricha granulosa mazamae
  (Crater Lake Newt)
G5T1Q  
Trilobopsis loricata
  (Scaly Chaparral)
G2G3  
Vespericola sierranus
  (Siskiyou Hesperian)
G2  

Vegetation Composition (incomplete)
Species Name Rounded Global Status Growth Form Stratum Char-
acter-
istic
Domi-nant Con-stant
Cover Class %
Con-
stancy
%
Acer macrophyllum G5 Broad-leaved deciduous tree Tree (canopy & subcanopy)    
 
 
Abies concolor var. lowiana T5 Needle-leaved tree Tree (canopy & subcanopy)    
 
 
Calocedrus decurrens G5 Needle-leaved tree Tree (canopy & subcanopy)    
 
 
Pinus lambertiana G5 Needle-leaved tree Tree (canopy & subcanopy)    
 
 
Pseudotsuga menziesii G5 Needle-leaved tree Tree (canopy & subcanopy)    
 
 
Sequoiadendron giganteum G3 Needle-leaved tree Tree canopy    
 
 
Corylus cornuta G5 Broad-leaved evergreen shrub Shrub/sapling (tall & short)    
 
 
Kalmiopsis fragrans G2 Broad-leaved evergreen shrub Short shrub/sapling      
 
 
Perideridia erythrorhiza G2 Flowering forb Herb (field)      
 
 
Ramaria coulterae G2 Non-plant Nonvascular      
 
 
Ramaria rubribrunnescens G2 Non-plant Nonvascular      
 
 
Rhizopogon atroviolaceus G2 Non-plant Nonvascular      
 
 
Rhizopogon brunneiniger G2 Non-plant Nonvascular      
 
 
Rubroboletus pulcherrimus G3 Non-plant Nonvascular      
 
 


Animal Species Reported for this Ecological System
Scientific Name
  (Common Name)
Global Status U.S. Endangered Species Act Status Charact-
eristic
Exotic
Chloealtis aspasma
  (Siskiyou Chloealtis Grasshopper)
G1      
Erethizon dorsatum
  (North American Porcupine)
G5      
Monadenia chaceana
  (Siskiyou Shoulderband)
G2G3      
Monadenia fidelis celeuthia
  (Pacific Sideband)
G4G5T1      
Monadenia fidelis ssp. 2
  (Umpqua Sideband)
G4G5T1      
Mustela frenata
  (Long-tailed Weasel)
G5      
Piranga ludoviciana
  (Western Tanager)
G5      
Polites mardon
  (Mardon Skipper)
G2G3      
Pristiloma johnsoni
  (Broadwhorl Tightcoil Snail)
G3      
Prophysaon sp. 1
  (a terrestrial slug)
G2      
Rana pretiosa
  (Oregon Spotted Frog)
G2 LT: Listed threatened    
Regulus satrapa
  (Golden-crowned Kinglet)
G5      
Setophaga coronata
  (Yellow-rumped Warbler)
G5      
Taricha granulosa mazamae
  (Crater Lake Newt)
G5T1Q      
Trilobopsis loricata
  (Scaly Chaparral)
G2G3      
Vespericola sierranus
  (Siskiyou Hesperian)
G2      


Distribution
Color legend for Distribution Map
Nation: United States
United States Distribution: CA, NV, OR
Global Range: This system is found from 800-1000 m (2400-3000 feet) elevation in the Sierra Nevada and 1250-2200 m (3800-6700 feet) in the Klamath Mountains.

Biogeographic Divisions
Division Code and Name Primary Occurrence Status
206-Mediterranean California C: Confident or certain

The Nature Conservancy's Conservation Ecoregions
Code Name Occurrence Status
12 Sierra Nevada Confident or certain
14 California North Coast Confident or certain
5 Klamath Mountains Confident or certain

MRLC 2000 Mapzones
Code Name Occurrence Status
2 Oregon Coastal Range Confident or certain
3 Northern California Coastal Range Confident or certain
4 Southern California Coastal Range Possible
6 Sierra Nevada Mountain Range Confident or certain
7 Cascade Mountain Range Confident or certain
12 Western Great Basin Possible

National Mapping
ESLF Code (Ecological System Lifeform): 4215
ESP Code (Environmental Site Potential): 1028
EVT Code (Existing Vegetation Type): 2028

West Landfire Legend: Yes
East Landfire Legend: No

Authors/Contributors
Element Description Edition Date: 12Jan2012
Element Description Author(s): P. Comer, T. Keeler-Wolf, G. Kittel

Ecological data developed by NatureServe and its network of natural heritage programs (see Local Programs) and other contributors and cooperators (see Sources).


References
  • Barbour, M. G., and J. Major, editors. 1988. Terrestrial vegetation of California: New expanded edition. California Native Plant Society, Special Publication 9, Sacramento. 1030 pp.

  • Barbour, M. G., and W. D. Billings, editors. 2000. North American terrestrial vegetation. Second edition. Cambridge University Press, New York. 434 pp.

  • Comer, P., D. Faber-Langendoen, R. Evans, S. Gawler, C. Josse, G. Kittel, S. Menard, C. Nordman, M. Pyne, M. Reid, M. Russo, K. Schulz, K. Snow, J. Teague, and R. White. 2003-present. Ecological systems of the United States: A working classification of U.S. terrestrial systems. NatureServe, Arlington, VA.

  • Eyre, F. H., editor. 1980. Forest cover types of the United States and Canada. Society of American Foresters, Washington, DC. 148 pp.

  • Holland, V. L., and D. J. Keil. 1995. California vegetation. Kendall/Hunt Publishing Company, Dubuque, IA. 516 pp.

  • Sawyer, J. O., and T. Keeler-Wolf. 1995. A manual of California vegetation. California Native Plant Society, Sacramento. 471 pp.


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