Hi,
Asche auf mein Haupt. Im Ancient Bristlecone Pine Forest stehen tatsächlich die gleichen Bristlecone Pines wie im Great Basin am Wheeler Peak. Bei nps.gov habe ich dazu folgenden Text gefunden:
Pinus longaeva, the oldest living thing, has been known to live for over 4,900 years. It usually grows between 9,000 and 11,500 feet although specimens can be found at lower elevations. Bristlecone grows on exposed rocky sites above the continuous forest. It is usually found on limestone or dolomite but, as is the case on Wheeler Peak, will grow on quartzite or volcanic rock. It forms woodlands alone or with limber pine and Engelmann spruce. At timberline this tree will form krumholtz. At lower elevations it retains its upright shape but stops growing taller at 15 to 30 feet. Trees in protected sites may grow to heights of 60 feet. Wind and snow at higher elevations cause the crown to become bushy and distorted. Wind blown sand and ice crystal polishes the trunk, often wearing away sections of the tree.
Needles are short, one-inch long, and in packets of five. The dark green needles surround the twig and tufts may extend back a foot or more along the branch. Needles can last up to forty years. Developing cones are purple, which helps absorb heat. After two years they turn brown at maturity. The woody scales on the three inch long cones are each tipped with a fragile cat claw-like bristle. Although the seeds are winged, the bristlecone is heavily dependent on nutcrackers to help with dispersion. Bristlecones survive longest where conditions are most strenuous. They are slow growing and easily out-competed by faster growing trees so they have adapted to the harshest conditions where other trees won't grow. The oldest known living bristlecone, 4,600+ years old, is in the White Mountains near Bishop, California. A 4,900+ year old tree was removed from the Wheeler Peak grove in 1964.
Thema: Las Vegas -Yosemite mit RV (Gelesen 720 mal)