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Pinus longaeva (commonly referred to as the Great Basin bristlecone pine, intermountain bristlecone pine, or western bristlecone pine) [4] is a long-living species of bristlecone pine tree found in the higher mountains of California, Nevada, and Utah. [5]
Great Basin bristlecone pine (Pinus longaeva) in Utah, Nevada and eastern California. The famous longest-lived species; often the term bristlecone pine refers to this tree in particular. Rocky Mountain bristlecone pine (Pinus aristata) in Colorado, New Mexico and Arizona. The most populous species; capable of forming closed canopies and, unlike ...
The IUCN also lists 244 subspecies and 235 varieties as Vulnerable. No subpopulations of plants have been evaluated by the IUCN. For a species to be assessed as vulnerable to extinction the best available evidence must meet quantitative criteria set by the IUCN designed to reflect "a high risk of extinction in the wild".
The IUCN Red List of Threatened Species by the International Union for Conservation of Nature is the best known worldwide conservation status listing and ranking system. . Species are classified by the IUCN Red List into nine groups set through criteria such as rate of decline, population size, area of geographic distribution, and degree of population and distribution fragmenta
Among the IUCN Species Survival Commission Specialist Groups and IUCN Red List Authorities in existence in 2018, 52 out of the 135 working groups chose to contribute to the Green Status pilot. [3] In interviews of stakeholders performed by the IUCN, it was suggested that Green List assessments may be most effective if performed at multiple ...
The IUCN also lists 284 subspecies and varieties as critically endangered. Additionally 5371 plant species (8.1% of those evaluated) are listed as data deficient , meaning there is insufficient information for a full assessment of conservation status.
A dendrochronology, based on these trees and other bristlecone pine samples, extends back to about 9000 BC, albeit with a single gap of about 500 years. [20] [3] An older bristlecone pine was reportedly discovered by Tom Harlan in 2009, based on a sample core collected in 1957. According to Harlan, the tree was 5,062 years old and still living ...
The IUCN also lists 131 subspecies and 118 varieties as least concern. No subpopulations of plants have been evaluated by the IUCN. ... Pinus longaeva, Great Basin ...