Abies vejarii var. mexicana 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Pinopsida Pinales Pinaceae

Scientific Name: Abies vejarii Martínez var. mexicana (Martínez) T.S.Liu
Parent Species:
Abies mexicana Martínez
Abies vejarii Martínez ssp. mexicana (Martínez) Farjon
Taxonomic Source(s): Farjon, A. 2010. A Handbook of the World's Conifers. Koninklijke Brill, Leiden.
Taxonomic Notes: The taxonomy of this variety is questionable. Rushforth (1987) has rejected alliance of this variety with A. vejarii and placed this taxon close to Abies durangensis. The latter species occurs in the Sierra Madre Occidental; A. vejarii is native in the Sierra Madre Oriental (including its varieties).

Assessment Information [top]

Red List Category & Criteria: Vulnerable D2 ver 3.1
Year Published: 2013
Date Assessed: 2011-05-09
Assessor(s): Farjon, A.
Reviewer(s): Thomas, P. & Perez de la Rosa, J.

Known from four disjunct locations, and with an area of occupancy (AOO) of 36 km² or less, this variety is prone to stochastic events that could destroy a subpopulation. It qualifies for listing as Vulnerable under criterion D2, as if one or more subpopulation were destroyed it would move very quickly towards qualifying for listing as Critically Endangered.

Previously published Red List assessments:

Geographic Range [top]

Range Description:Endemic to Mexico, occurring in Coahuila, Nuevo León (Sierra de Santa Catarina), and Tamaulipas.
Countries occurrence:
Mexico (Coahuila, Nuevo León, Tamaulipas)
Additional data:
Estimated area of occupancy (AOO) - km2:36
Number of Locations:4
Lower elevation limit (metres):2000
Upper elevation limit (metres):3000
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:According to herbarium data this variety is known from four locations, in one it occurs together with var. macrocarpa. No data are available on population size or trends.
Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:This variety occurs usually on north-facing slopes and in steep ravines at altitudes between 2,000 m and 3,000 m a.s.l. Cupressus arizonica and Picea engelmannii subsp. mexicana (another narrow endemic relict taxon) have been reported to occur with A. vejarii var. mexicana.
Generation Length (years):40

Use and Trade [top]

Use and Trade: This variety is not a commercial timber tree. It is rare in cultivation.

Threats [top]

Major Threat(s): The main threat would be devastating wild fires, which could destroy a subpopulation.

Conservation Actions [top]

Conservation Actions: Further field studies are required to determine this taxon's distribution and identify any threats beyond those represented by its apparently small population size.

Classifications [top]

1. Forest -> 1.4. Forest - Temperate
suitability:Suitable  major importance:Yes
2. Land/water management -> 2.3. Habitat & natural process restoration

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Occur in at least one PA:Unknown
In-Place Species Management
In-Place Education
7. Natural system modifications -> 7.1. Fire & fire suppression -> 7.1.1. Increase in fire frequency/intensity
♦ timing:Ongoing ♦ scope:Majority (50-90%) ♦ severity:Rapid Declines ⇒ Impact score:Medium Impact: 7 
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation
  • 2. Species Stresses -> 2.1. Species mortality

1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.5. Threats

Bibliography [top]

Farjon, A. 2010. A Handbook of the World's Conifers. Koninklijke Brill, Leiden.

IUCN. 2013. IUCN Red List of Threatened Species (ver. 2013.1). Available at: http://www.iucnredlist.org. (Accessed: 12 June 2013).

Rushforth, K. 1987. Conifers. Christopher Helm, London.

Citation: Farjon, A. 2013. Abies vejarii var. mexicana. In: . The IUCN Red List of Threatened Species 2013: e.T34145A2847778. . Downloaded on 19 June 2018.
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