Araucaria bernieri
Araucaria bernieri is a plant of the genus Araucaria (Araucaria ). She is on the south of the island belonging to New Caledonia Grande Terre endemic.
- 5.1 Notes and references
Description
Vegetative characteristics
Araucaria bernieri grows as columnar, evergreen tree that can reach heights of growth of 40 to 50 meters. The gray bark peels off in thin strips. The 4 to 6 millimeters thick branches of a plane are arranged in a U -shape.
In young specimens the leaves are needle-like and relatively thick with a length of about 7 mm, triangular with a sharp- pointed top. On older trees the like roof tiles covering sheets with a length of 2 to 3.5 millimeters and a width of 1.5 to 2.5 millimeters are scale-like, keeled - triangular with a curved- top.
Generative features
Araucaria bernieri is dioecious getrenntgeschlechtig ( dioecious ). The bluish- white-colored male cones are cylindrically shaped with a length of 4-9 cm and a diameter from 0.8 to 1.6 centimeters. They contain triangular Mikrosporophylle with four to six pollen sacs. The clear blue -green colored female cones have a length of 10 centimeters and a diameter of 7.5 to 8 centimeters. The egg-shaped with a length of about 3 inches seed has a broad rounded wings.
Occurrence
The natural range of Araucaria bernieri includes the island belonging to New Caledonia Grande Terre. Can be found after Plaine des Lacs in the southern part of the island of Col de Petchécara. The suspected in the northern part of the island of occurrence in the surrounding areas of the municipality Poum it turned out that there are copies of the species Araucaria scopulorum de Laubenfels.
Araucaria bernieri thrives at altitudes 0-700 meters. They settled mostly humid, evergreen forests and river valleys. It grows mainly on soils that develop on ultramafic rocks.
System
Araucaria bernieri belongs to the section Eutacta within the genus Araucaria (Araucaria ). The first description of Araucaria bernieri was made in 1949 by John Theodore Buchholz in Bulletin du Muséum d' Histoire Naturelle, 21, pp. 280
In the Araucaria bernieri described by John Silba in 2000 var pumilio, which was found near Tiébaghi in the northern part of Grande Terre, it turned out later that it is Araucaria scopulorum de Laubenfels.
Threats and conservation
Araucaria bernieri is in the IUCN Red List as "vulnerable" out. The total population is estimated at less than 10,000 trees and should decrease within the next 10 years by about 10 %. As one of the main reasons for the mine construction risk, and the associated activities such as road construction and overburden storage is called. Forest fires, especially for rejuvenating a hazard and the risk from logging today is only of minor importance.
Swell
- Template: Internet resource / maintenance / access date not in ISO format Christopher J. Earle: Araucaria bernieri. In: The Gymnosperm Database. www.conifers.org, accessed 29 May 2011 (English).