Pinus strobus var. chiapensis
|Scientific Name:||Pinus strobus var. chiapensis|
See Pinus strobus
Pinus chiapensis (Martínez) Andresen
|Taxonomic Source(s):||Farjon, A. 2010. A Handbook of the World's Conifers. Koninklijke Brill, Leiden.|
|Red List Category & Criteria:||Endangered B2ab(ii,iii,v) ver 3.1|
|Assessor(s):||Thomas, P. & Farjon, A.|
|Reviewer(s):||Perez de la Rosa, J. & Gardner, M.|
Pinus strobus var. chiapensis has a relatively large extent of occurrence. Within this area, subpopulations tend to small and isolated, with the largest subpopulations occurring in Chiapas and Oaxaca. The total area of occupancy, based on herbarium specimens representing all major localities, and using standard IUCN mapping techniques (IUCN 2011) is estimated to be 384 km2. Subpopulations are severely fragmented and there is a continuing decline in area of occupancy, quality of habitat and probably number of mature individuals. On this basis it is assessed as Endangered under the B2 criteria.
|Previously published Red List assessments:|
Recorded from southern Mexico: in Guerrero, E Puebla, Veracruz, Oaxaca and Chiapas; and Guatemala: in the departments of El Quiche and Huehuetenango. In Mexico it is most abundant in the States of Oaxaca and Chiapas; isolated occurrences are also found in Puebla, Guerrero, and Veracruz.
Native:Guatemala; Mexico (Chiapas, Guerrero, Oaxaca, Puebla, Veracruz)
|Range Map:||Click here to open the map viewer and explore range.|
Subpopulations are generally small, 5 to 20 ha throughout its range. The largest subpopulation at El Rincon in Oaxacana is estimated to have more than 50,000 mature individuals spread over an area of 1,500 ha of secondary forest (Castillo and Trujillo 2008).
|Current Population Trend:||Decreasing|
|Habitat and Ecology:|
This variety occurs in the mountains of southern Mexico and Guatemala, at altitudes from 500 m (but usually 800 m) to 2,200 m a.s.l. It is usually found in mixed angiosperm-coniferous forest, or mixed with other pines in pine forests (less commonly). These are often cloud forests, with frequent fog, especially those ranges facing the Gulf of Mexico. Annual precipitation may exceed 3,000 mm. This variety experiences no frost.
At low elevations it is associated with: Pinus maximinoi, P. oocarpa, P. devoniana, P. pringlei, at higher elevations with: Pinus ayacahuite, P. pseudostrobus, P. patula var. longipedunculata, P. tecunumanii and P. teocote. In wet places it also commonly occurs with Cyathaea mexicana (Dvorak et al. 2000).For a more detailed review of this variety’s ecology see Castillo et al. 2009.
|Continuing decline in area, extent and/or quality of habitat:||Yes|
|Generation Length (years):||30|
|Use and Trade:||
Logging for its timber has been widespread, and although large trees are becoming rare in many locations, is still ongoing. Logs are used as beams in roofs of rural houses and buildings. The wood is used as firewood for cooking and for furniture manufacturing, and may be preferred over that of other coexisting pine species. The wood was a source of pulp for industrial papermaking in Oaxaca, before commercial exploitation was restricted. The resin is a fuel source, and is successfully applied to humans and domestic animals as an ointment in wounds and bone fractures (del Castillo and Acosta Castellanos 2002). A resin extract is said to be helpful as an analgesic for rheumatic pain, and an inner bark infusion can be helpful against coughing (Castillo et al. 2009).
Although a valuable timber tree logged locally, the main reason for its decline is deforestation and/or forest degradation. In some parts of its range it has historically been overexploited for ship building / repairs. The forest area originally occupied by P. strobus var. chiapensis is being cut for growing corn, coffee plantations, or for establishing pastures for cattle, drastically reducing the subpopulations. An additional cause of destruction is the introduction of exotic species, such as Casuarina equisetifolia L. and Cupressus lusitanica Miller in forests dominated by P. chiapensis. Levels of threat vary between regions and subpopulations.
|Conservation Actions:||Pinus strobus var. chiapensis requires disturbance for regeneration. In a review of recent studies relating to its exploitation and conservation status it was identified as having been one of "the most abundant tree species in early successional stands of the tropical montane cloud forest playing a key role in ecosystem regeneration particularly in areas managed under slash-and-burn practices" (Castillo et al. 2009). Well preserved landscapes tended to have smaller populations as do areas that have been largely deforested. What is required to ensure its continued presence is a careful balance of forest preservation and forest utilization.|
|Citation:||Thomas, P. & Farjon, A. 2013. Pinus strobus var. chiapensis. The IUCN Red List of Threatened Species 2013: e.T32499A2820834.Downloaded on 28 July 2016.|
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