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Pinus tecunumanii

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Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA PINOPSIDA PINALES PINACEAE

Scientific Name: Pinus tecunumanii
Species Authority: Eguiluz & J.P.Perry
Common Name/s:
English Schwerdtfeger's Pine, Tecun Uman Pine
Spanish Ocote de Caretilla, Pino Tecun Uman
Synonym/s:
Pinus patula Schiede ex Schltdl. & Cham. variety tecunumanii (Eguiluz & J.P.Perry) Styles

Assessment Information [top]

Red List Category & Criteria: Vulnerable A2cd+4cd; B2ab(ii,iii,v) ver 3.1
Year Published: 2013
Date Assessed: 2011-06-24
Assessor/s: Farjon, A.
Reviewer/s: Thomas, P. & Perez de la Rosa, J.
Justification:
Past and recent exploitation has led to a decline of up to 40% within the last three generations. The area of occupancy has been reduced to less than 2,000 km2. While there are more than 10 locations, the subpopulations are thought to be severely fragmented due to logging and conversion of forest lands to other uses. Exploitation is ongoing: if it continues at the same rate as in the recent past the overall decline is likely to exceed 40% within the next generation. Taken together, this indicates an assessment of at least Vulnerable under the criteria for A2, A4 and B2.
History:
1998 Vulnerable

Geographic Range [top]

Range Description: Recorded from southern Mexico: Oaxaca, Chiapas; Belize; Guatemala; Honduras; El Salvador; and Nicaragua.
Countries:
Native:
Belize; El Salvador; Guatemala; Honduras; Mexico (Chiapas, Oaxaca); Nicaragua
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: While still extensive in its range, subpopulations have dwindled in many locations in terms of mature trees. Several of these are fragmented in the sense that in some localities only a few trees are left from what was formerly a substantial number, and these are now isolated from similar stands. Moreover, the Mexican subpopulations are a long distance from the main extent of occurrence in Central America.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: The altitudinal range of this species is considerable: (300-)550-2,500(-2,900) m a.s.l. In Belize it is found between 300-760 m a.s.l. It is a major constituent of more or less open to closed-canopy pine and pine-oak forests in climatic zones which receive at least 1,000 mm of rainfall per annum, and up to 2,500-3,000 mm in some places. The dry season is usually long, lasting from November to May, so that at lower to middle altitudes fires are an integral phenomenon in the ecosystem, the frequency of which has been however greatly accelerated by humans. Here, open pine stands with grasses, Pteridium aquilinum, Rubus, Calliandra, and Leucaena are predominant as long as the disturbances do not lead to further degradation. In less disturbed areas, mostly at higher altitudes, P. tecunumanii is often associated with other pines, such as P. oocarpa, P. maximinoi, and P. pseudostrobus, and at the more mesic sites P. ayacahuite and P. strobus var. chiapensis. Abies guatemalensis and Cupressus lusitanica are other conifers on these high mountain ridges. On the Atlantic slopes in Chiapas a mixed angiosperm forest with Liquidambar, Magnolia, Clethra, Carpinus, Symplocos, Quercus and many other species predominates, and Pinus tecunumanii and other pines occur either on poorer sites or at an earlier stage in a sere leading back to dominance of broad-leaved trees.
Systems: Terrestrial

Threats [top]

Major Threat(s): While occasionally still abundant and of very tall stature, this pine is now usually scattered in small, disjunct subpopulations and has been depleted by overexploitation and forest clearing, especially at lower elevations, to such an extend that many of these subpopulations are now vulnerable to extinction (Dvorak and Donahue 1992).

Conservation Actions [top]

Conservation Actions: This species occurs in a number of protected areas, but in several of these there is little effective control of (illegal) logging.
Citation: Farjon, A. 2013. Pinus tecunumanii. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 19 April 2014.
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