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Overview

Distribution

Localities documented in Tropicos sources

Pinus latisquama Engelm.:
Mexico (Mesoamerica)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Localities documented in Tropicos sources

Pinus pinceana Gordon & Glend.:
Mexico (Mesoamerica)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Ecology

Habitat

Sierra Madre Oriental Pine-oak Forests Habitat

This taxon is found in the Sierra Madre Oriental pine-oak forests, which exhibit a very diverse community of endemic and specialized species of plants, mammals, reptiles and amphibians. These high mountains run north to south, beginning in the USA and ending in Mexico. The Sierra Madre Oriental pine-oak forests are a highly disjunctive ecoregion, owing to the fact that they are present only at higher elevations, within a region with considerable expanses of lower elevation desert floor.

The climate is temperate humid on the northeastern slope, and temperate sub-humid on the western slope and highest portions of the mountain range. Pine-oak forest habitat covers most of the region, even though most of the primary forest has been destroyed or degraded. However, the wettest portions house a community of cloud forests that constitute the northernmost patches of this vegetation in Mexico. The forests grow on soils derived from volcanic rocks that have a high content of organic matter. The soils of lower elevations are derived from sedimentary rocks, and some of them are formed purely of limestone. In the northernmost portions of the ecoregion, the forests occur on irregular hummocks that constitute biological "islands" of temperate forest in the middle of the Chihuahuan Desert. To the south, from Nuevo León southward until Guanajuato and Queretaro, the ecoregion is more continuous along the mainstem of the Sierra Madre Oriental.

Dominant tree species include the pines: the endemic Nelson's Pine (Pinus nelsonii), Mexican Pinyon (P. cembroides), Smooth-bark Mexican Pine (P. pseudostrobus), and Arizona Pine (P. arizonica); and the oaks Quercus castanea and Q. affinis. In mesic environments, the most common species are P. cembroides, and Alligator Juniper (Juniperus deppeana), but in more xeric environments on the west slopes of the mountains, the endemic P. pinceana is more abundant. Gregg's Pine (P. greggii) and Jelecote Pine (P. patula) are endemic.

Many mammalian species wander these rugged hills. Mule Deer (Odocoileus hemionus), Puma (Puma concolor), Cliff Chipmunk (Tamias dorsalis), Collared Peccary (Tayassu tajacu), Coati (Nasua narica), Jaguar (Panthera onca) and Coyote (Canis latrans) are a few of the many diverse mammals that inhabit this ecoregion. Some threatened mammals found in the ecoregion are: Bolaños Woodrat (Neotoma palatina VU); Diminutive Woodrat (Nelsonia neotomodon NT), known chiefly from the western versant of the Sierra Madre; Chihuahuan Mouse (Peromyscus polius NT); and Mexican Long-nosed Bat (Leptonycteris nivalis EN).

A considerable number of reptilian taxa are found in the Sierra Madre Oriental pine-oak forests, including three endemic snakes: Ridgenose Rattlesnake (Crotalus willardi); Fox´s Mountain Meadow Snake (Adelophis foxi); and the Longtail Rattlesnake (Crotalus stejnegeri VU), restricted to the central Sierra Madre. An endemic skink occurring in the ecoregion is the Fair-headed Skink (Plestiodon callicephalus). The Striped Plateau Lizard (Sceloporus virgatus) is endemic to the ecoregion. The Sonoran Mud Turtle (Kinosternon sonoriense VU) is found in the ecoregion and ranges from southwestern New Mexico south to northwestern Chihuahua.

The following anuran taxa occur in the Sierra Madre Oriental pine-oak forests: Red-spotted Toad (Anaxyrus punctatus); Cane Toad (Rhinella marina); Elegant Narrow-mouthed Toad (Gastrophryne elegans); New Mexico Spadefoot Toad (Spea multiplicata); Sinaloa Toad (Incilius mazatlanensis); Pine Toad (Incilius occidentalis); Southwestern Toad (Anaxyrus microscaphus); Woodhouse's Toad (Anaxyrus woodhousii); Great Plains Narrowmouth Toad (Gastrophryne olivacea); Great Plains Toad (Anaxyrus cognatus); Plateau Toad (Anaxyrus compactilis); Texas Toad (Anaxyrus speciosus); Sonoran Desert Toad (Incilius alvarius), found only at lower ecoregion elevations here; Rana-ladrona Silbadora (Eleutherodactylus teretistes); Sabinal Frog (Leptodactylus melanonotus); Mexican Leaf Frog (Pachymedusa dacnicolor); Montezuma Leopard Frog (Lithobates montezumae); Yavapai Leopard Frog (Lithobates yavapaiensis); Northwest Mexico Leopard Frog (Lithobates magnaocularis); Bigfoot Leopard Frog (Lithobates megapoda), who generally breeds in permanent surface water bodies; Mexican Cascade Frog (Lithobates pustulosus); Tarahumara Frog (Lithobates tarahumarae VU); Western Barking Frog (Craugastor augusti); Lowland Burrowing Frog (Smilisca fodiens); Taylor's Barking Frog (Craugastor occidentalis); Blunt-toed Chirping Frog (Eleutherodactylus modestus VU), found only at the very lowest elevations of the ecoregion; Shiny Peeping Frog (Eleutherodactylus nitidus); California Chorus Frog (Pseudacris cadaverina); Rio Grande Frog (Lithobates berlandieri); Madrean Treefrog (Hyla eximia); Mexican Treefrog (Smilisca baudinii); Dwarf Mexican Treefrog (Tlalocohyla smithii); Canyon Treefrog (Hyla arenicolor); Northern Sheep Frog (Hypopachus variolosus); Chiricahua Leopard Frog (Lithobates chiricahuensis). There are three salamanders found in the ecoregion: the endemic Sacramento Mountains Salamander (Aneides hardii), found only in very high montane reaches above 2400 meters; Tiger Salamander (Ambystoma tigrinum); and the Tarahumara Salamander (Ambystoma rosaceum).

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Habitat and Ecology

Habitat and Ecology
This species occurs in arid areas at altitudes ranging from 1,100 m asl (Nuevo León) to 2,300 asl. Rainfall is between 350 and 600 mm per year with higher rainfall in the southern part of its range. It usually occurs as scattered individuals among Pinus cembroides Zucc. and drooping juniper (Juniperus flaccida Schlecht.). Associated vegetation varies, depending on the amount of rainfall, although it is dominated by sclerophyllous and deciduous desert shrubs.

Systems
  • Terrestrial
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Pinus pinceana

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Statistics of barcoding coverage: Pinus pinceana

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 7
Specimens with Barcodes: 17
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2013

Assessor/s
Favela, S. & Thomas, P.

Reviewer/s
Gardner, M. & Farjon, A.

Contributor/s

Justification
Pinus pinceana's distribution extends over a distance of more than 750 km from north to south. Its extent of occurrence is well in excess of 20,000 km2. Due to the disjunct and scattered distribution of stands the area of occupancy is probably less than 2,000 km2. It is known from at least 17 localities and subpopulations could be considered to be severely fragmented. Despite a reported lack of regeneration throughout its range and a potential threat from fuelwood collection, there is currently no indication of significant recent or current decline. Consequently an assessment of Least Concern is appropriate.

History
  • 1997
    Rare
    (Walter and Gillett 1998)
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Population

Population
Subpopulations are scattered and disjunct, especially in the southern parts of its range. They range in size from 300 to 10,000 trees (Delgado 2008). They occur in three main areas: northern (Coahuila, Zacatecas, Nuevo León) central (San Luis Potosí) and southern (Hidalgo and Querétaro). Northern populations show distinct genetic variation from those in the central and southern parts of its range (Ledig 2001, Delgado 2008). Common garden experiments indicate that subpopulations also show local adaptations to variations in rainfall and average temperatures (Martinon 2010).

Population Trend
Stable
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Threats

Major Threats
Although regeneration in some parts of its range has been reported to be poor, probably as a result of over grazing (Perry 1991), more recent field work has found evidence of adequate regeneration throughout its range (Favela Lara unpubl. data 2011). Firewood collection may also be a potential threat.
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Management

Conservation Actions

Conservation Actions
Pinus pinceana is poorly represented within Mexico's network of protected areas: it is estimated that less than 8% of the total population is protected in situ. The recently discovered stands in Nuevo León occur within the Parque Nacional Cumbres de Monterrey. Pinus pinceana is listed on the Mexican National Red List (Norma Oficial Mexicana) and the Red List for Nuevo León as a species requiring special protection (NOM-059-SEMARNAT-2001).
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Wikipedia

Pinus pinceana

Weeping Pinyon (Pinus pinceana) is a species of conifer in the Pinaceae family. It is found only in Mexico. It is threatened by habitat loss.

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