アメリカ内務省のインスタグラム(usinterior) - 4月28日 09時44分

The tradition of #ArborDay began in Nebraska in 1872 to raise awareness of the importance of trees and improve the health of forests. Another remarkable tree found on public lands is the giant sequoia. Comparable in size to a 26-story building and a diameter that exceeds the width of many city streets, the giant sequoia has earned the record of the world’s largest tree. Not only do sequoias loom over their mixed conifer forest neighbors, but they also outlive them -- reaching over 3,000 years (although Bristlecone pines are the world’s oldest trees). A major factor in the sequoia’s longevity is the chemical tannin that provides the #sequoia with resistance against fire, rotting and boring insects. Another crucial factor is fire, which helps with sequoia reproduction. While most take a trip to #California’s Sequoia and Kings Canyon National Parks to marvel at the sequoias in real life, another option is to explore nearby #CaseMountain, which was established to protect these majestic trees. Photo by Bob Wick, Bureau of Land Management (@mypubliclands). #usinterior travel

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