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MADREAN PINYON-JUNIPER WOODLAND (S112)
Division 305, Forest and Woodland, CES305.797
Spatial Scale & Pattern: Matrix Classification Confidence: medium
Required Classifiers: Natural/Semi-natural, Vegetated (>10% vasc.), Upland
Diagnostic Classifiers: Montane [Lower Montane], Tropical/Subtropical [Tropical Xeric], Shallow Soil, Xeric, F-Patch/Medium Intensity, Needle-Leaved Tree, Evergreen Sclerophyllous Shrub, Pinus cembroides, Juniperus deppeana
Non-Diagnostic Classifiers: Forest and Woodland (Treed), Shrubland (Shrub-dominated), Sideslope, Intermediate Disturbance Interval, Broad-Leaved Evergreen Tree, Xeromorphic Shrub
Concept Summary: This system occurs on foothills, mountains and plateaus in the Sierra Madre Occidentale and Sierra Madre Orientale in Mexico, Trans-Pecos Texas, southern New Mexico and in southern and central Arizona, from the Mogollon Rim south to the Sky Islands. Substrates are variable, but soils are generally dry and rocky. The presence of Pinus cembroides, Pinus discolor, or other Madrean trees and shrubs is diagnostic of this woodland system. Juniperus coahuilensis, Juniperus deppeana, Juniperus pinchotii, Juniperus monosperma, and/or Pinus edulis may be present to dominant. Madrean oaks such as Quercus arizonica, Quercus emoryi, Quercus grisea or Quercus mohriana may be codominant. Pinus ponderosa is absent or sparse. If present, understory layers are variable and may be dominated by shrubs or graminoids.
DISTRIBUTION
Range: Sierra Madre Occidentale and Sierra Madre Orientale in Mexico, Trans-Pecos Texas, southern New Mexico and Arizona, generally south of the Mogollon Rim.
Ecological Divisions: 305
TNC Ecoregions: 22:C, 24:C, 30:C
Subnations/Nations: AZ:c, NM:c, nMX:c, TX:c
CONCEPT
Alliances and Associations:
• CUPRESSUS ARIZONICA FOREST ALLIANCE (A.163) Cupressus arizonica / Quercus hypoleucoides Forest (CEGL000352) Cupressus arizonica / Quercus turbinella Forest (CEGL000353)
• JUNIPERUS COAHUILENSIS WOODLAND ALLIANCE (A.503) Juniperus coahuilensis / Bouteloua curtipendula - Bouteloua gracilis Woodland (CEGL004584) Juniperus coahuilensis / Bouteloua eriopoda Woodland (CEGL000700) Juniperus coahuilensis / Canotia holacantha Woodland (CEGL000701) Juniperus coahuilensis / Quercus turbinella Woodland (CEGL000702)
JUNIPERUS DEPPEANA WOODLAND ALLIANCE (A.534) Juniperus deppeana - Juniperus monosperma - Quercus grisea / Rhus trilobata Woodland (CEGL000696) Juniperus deppeana - Juniperus monosperma / Cercocarpus montanus - Ceanothus greggii Woodland (CEGL000695) Juniperus deppeana / Arctostaphylos pungens Woodland (CEGL000692) Juniperus deppeana / Muhlenbergia emersleyi Woodland (CEGL000697) Juniperus deppeana / Panicum obtusum Woodland (CEGL000698)
• JUNIPERUS MONOSPERMA WOODLAND ALLIANCE (A.504) Juniperus monosperma - Quercus mohriana Woodland (CEGL002120) Juniperus monosperma / Agave lechuguilla Woodland (CEGL000703) Juniperus monosperma / Larrea tridentata Woodland (CEGL000717) Juniperus monosperma / Nolina microcarpa - Agave lechuguilla Woodland (CEGL000718) Juniperus monosperma / Prosopis glandulosa Woodland (CEGL000719)
• JUNIPERUS PINCHOTII WOODLAND ALLIANCE (A.505) Juniperus pinchotii / Bouteloua curtipendula - Bouteloua hirsuta Woodland (CEGL004940) Juniperus pinchotii / Bouteloua gracilis Woodland (CEGL002122)
• PINUS CEMBROIDES - QUERCUS GRAVESII FOREST ALLIANCE (A.392) Pinus cembroides - Quercus gravesii - Juniperus flaccida / Salvia regla / Piptochaetium fimbriatum Forest (CEGL004600)
• PINUS CEMBROIDES WOODLAND ALLIANCE (A.510) Pinus cembroides - Quercus grisea - Juniperus flaccida / Salvia regla / Muhlenbergia emersleyi Woodland (CEGL004596) Pinus cembroides - Quercus grisea - Quercus emoryi - Juniperus flaccida / Salvia regla / Bouteloua curtipendula Woodland (CEGL004597) Pinus cembroides - Quercus grisea - Quercus emoryi / Mimosa dysocarpa / Bouteloua gracilis Woodland (CEGL004598) Pinus cembroides - Quercus grisea / Agave lechuguilla / Bouteloua curtipendula Woodland (CEGL003551) Pinus cembroides - Quercus grisea / Muhlenbergia montana - Piptochaetium pringlei Woodland (CEGL004599)
• PINUS DISCOLOR WOODLAND ALLIANCE (A.538) Pinus (discolor, cembroides) / Quercus arizonica / Muhlenbergia emersleyi Woodland (CEGL000769) Pinus discolor / Muhlenbergia emersleyi Woodland (CEGL000767) Pinus discolor / Piptochaetium fimbriatum Woodland (CEGL000768) Pinus discolor / Quercus gambelii Woodland (CEGL000770) Pinus discolor / Quercus hypoleucoides Woodland (CEGL000771) Pinus discolor / Quercus rugosa Woodland (CEGL000772) Pinus discolor / Quercus toumeyi Woodland (CEGL000773)
• PINUS EDULIS - (JUNIPERUS SPP.) WOODLAND ALLIANCE (A.516) Pinus edulis - Quercus arizonica / Rhus trilobata Woodland (CEGL000790)
• PINUS REMOTA WOODLAND ALLIANCE (A.523) Pinus remota / Juniperus pinchotii - Quercus mohriana Woodland (CEGL004585)
SOURCES
Last updated: 20 Feb 2003
Stakeholders: WCS, SCS
Concept Author: NatureServe Western Ecology Team
LeadResp: WCS |
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