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Star trails @ Bishop CA
Great Basin Bristlecone pines (Pinus longaeva) are remarkable for their great age and their ability to survive adverse growing conditions. In fact, it seems one secret to their longevity is the harsh environment in which most bristlecone pines grow.
Bristlecone pines in Great Basin National Park grow in isolated groves just below treeline. Conditions are harsh, with cold temperatures, a short growing season, and high winds. Bristlecone pines in these high-elevation environments grow very slowly, and in some years don't even add a ring of growth. This slow growth makes their wood very dense and resistant to insects, fungi, rot, and erosion. Vegetation is very sparse, limiting the role of fire. Bristlecone pine seeds are occassionally cached by birds at lower elevations. Bristlecone pines grow more rapidly in more "favorable" environments at lower elevations. They do not achieve their legendary age or fascinating twisted shapes.
While bristlecone pines are the longest-living tree, scientists debate what is truly the oldest living thing. The creosote bush that grows in the Mojave Desert may be older. The cresote achieves its age by "cloning" new bushes from its root system. Yet bristlecone pines surely deserve our respect for not only surviving harsh conditions, but thriving in harsh conditions.