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Giant Sequoias
''Sequoiadendron giganteum'' (giant sequoia; also known as giant redwood, Sierra redwood, Sierran redwood, California big tree, Wellingtonia or simply big treea nickname also used by John Muir) is the sole living species in the genus ''Sequoiadendron'', and one of three species of coniferous trees known as redwoods, classified in the family Cupressaceae in the subfamily Sequoioideae, together with ''Sequoia sempervirens'' (coast redwood) and ''Metasequoia glyptostroboides'' (dawn redwood). Giant sequoia specimens are the most massive trees on Earth. The common use of the name ''sequoia'' usually refers to ''Sequoiadendron giganteum'', which occurs naturally only in groves on the western slopes of the Sierra Nevada mountain range of California. The giant sequoia is listed as an endangered species by the IUCN, with fewer than 80,000 trees remaining. Since its last assessment as an endangered species in 2011, it was estimated that another 13–19% of the population (or 9,761–1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grizzly Giant
The Grizzly Giant is a Sequoiadendron giganteum, giant sequoia in Yosemite National Park's Mariposa Grove. It has been measured many times; in 1990 Wendell Flint calculated its volume at , making it the List of largest giant sequoias, 26th-largest living giant sequoia. The Grizzly Giant is the oldest sequoia in the Mariposa Grove, the largest List of giant sequoia groves, giant sequoia grove in Yosemite National Park, with several hundred mature specimens. At one time, the Grizzly Giant was considered the oldest and largest tree in the world, aged between 2,000 and 3,000 years. In 2019, refined scientific dating methods resulted in a new age estimate for the Grizzly Giant: 2,995 years old (plus or minus 250 years). On July 16, 2022, the Washburn Fire threatened Grizzly Giant and other trees in Mariposa Grove. The National Park Service used sprinklers to protect the famous tree. Dimensions See also *List of largest giant sequoias *List of individual trees References *''Geolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wildfire Suppression
Wildfire suppression is a range of firefighting tactics used to suppress wildfires. Firefighting efforts in wild land areas require different techniques, equipment, and training from the more familiar structure fire fighting found in populated areas. Working in conjunction with specially designed aerial firefighting aircraft, these wildfire-trained crews suppress flames, construct fire lines, and extinguish flames and areas of heat to protect resources and natural wilderness. Wildfire suppression also addresses the issues of the wildland–urban interface, where populated areas border with wild land areas. In the United States and other countries, aggressive wildfire suppression aimed at minimizing fire has contributed to accumulation of fuel loads, increasing the risk of large, catastrophic fires. History Australia Wildland fire, known in Australia as bush fire, has played a major role in Australia due to arid conditions. Notable fire services tasked with wildfire suppres ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendrochronology
Dendrochronology (or tree-ring dating) is the scientific method of dating tree rings (also called growth rings) to the exact year they were formed. As well as dating them, this can give data for dendroclimatology, the study of climate and atmospheric conditions during different periods in history from wood. Dendrochronology derives from Ancient Greek (), meaning "tree", (), meaning "time", and (), "the study of". Dendrochronology is useful for determining the precise age of samples, especially those that are too recent for radiocarbon dating, which always produces a range rather than an exact date. However, for a precise date of the death of the tree a full sample to the edge is needed, which most trimmed timber will not provide. It also gives data on the timing of events and rates of change in the environment (most prominently climate) and also in wood found in archaeology or works of art and architecture, such as old panel paintings. It is also used as a check in radiocar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sequoiadendron (pollen Cones) 01
''Sequoiadendron'' is a genus of evergreen trees, with two species, only one of which survives to the present: * ''Sequoiadendron giganteum'', extant, commonly known as wellingtonia, giant redwood and giant sequoia, growing naturally in the Sierra Nevada of California * † ''Sequoiadendron chaneyi'', extinct, the predecessor of ''Sequoiadendron giganteum'', found mostly in the Nevada part of the Tertiary Colorado Plateau until the late Miocene Fossil record file:Sequoiadendron chaneyi.jpg, left, up ''Sequoiadendron chaneyi'' foliage fossil, Nevada ''Sequoiadendron'' fossil pollen and macrofossils may have been found as early as the Cretaceous and throughout the Northern Hemisphere, including locations in western Georgia in the Caucasus The Caucasus () or Caucasia (), is a region between the Black Sea and the Caspian Sea, mainly comprising Armenia, Azerbaijan, Georgia, and parts of Southern Russia. The Caucasus Mountains, including the Greater Caucasus range, have historicall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Grant (tree)
The General Grant tree is the largest Sequoiadendron giganteum, giant sequoia (''Sequoiadendron giganteum'') in the General Grant Grove section of Kings Canyon National Park in California and the List of largest giant sequoias, second largest giant sequoia tree in the world. Once thought to be well over 2,000 years old, recent estimates suggest the General Grant tree is closer to 1,650 years old. The tree also features the third largest footprint of any living giant sequoia, measuring in circumference at ground level. History The tree was named in 1867 after Ulysses S. Grant, Union Army general and the 18th President of the United States (1869–1877). President Calvin Coolidge proclaimed it the "Nation's Christmas tree, Christmas Tree" on April 28, 1926. Due in large part to its huge base, the General Grant tree was thought to be the largest tree in the world prior to 1931, when the first precise measurements indicated that the General Sherman (tree), General Sherman was slight ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diameter At Breast Height
Diameter at breast height, or DBH, is a standard method of expressing the diameter of the trunk or bole of a standing tree. DBH is one of the most common dendrometric measurements. Tree trunks are measured at the height of an adult's breast, which is defined differently in different countries and situations. In many countries, DBH is measured at approximately above ground. Global variation and scientific precision The height can make a substantial difference to the measured diameter. In the United States, DBH is typically measured at above ground. In some countries, such as Australia, New Zealand, Burma, India, Malaysia, and South Africa, breast height diameter has historically been measured at a height of , but because of much active research into allometrics that are being applied to trees and forests, the convention of is more appropriate. Ornamental trees are usually measured at 1.5 metres above ground. Some authors have argued that the term DBH should be aboli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sequoiadendron Giganteum MHNT
''Sequoiadendron'' is a genus of evergreen trees, with two species, only one of which survives to the present: * ''Sequoiadendron giganteum'', extant, commonly known as wellingtonia, giant redwood and giant sequoia, growing naturally in the Sierra Nevada of California * † ''Sequoiadendron chaneyi'', extinct, the predecessor of ''Sequoiadendron giganteum'', found mostly in the Nevada part of the Tertiary Colorado Plateau until the late Miocene Fossil record file:Sequoiadendron chaneyi.jpg, left, up ''Sequoiadendron chaneyi'' foliage fossil, Nevada ''Sequoiadendron'' fossil pollen and macrofossils may have been found as early as the Cretaceous and throughout the Northern Hemisphere, including locations in western Georgia in the Caucasus The Caucasus () or Caucasia (), is a region between the Black Sea and the Caspian Sea, mainly comprising Armenia, Azerbaijan, Georgia, and parts of Southern Russia. The Caucasus Mountains, including the Greater Caucasus range, have historicall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sequoiadendron Giganteum - Opened Male Cones RHu 02
''Sequoiadendron'' is a genus of evergreen trees, with two species, only one of which survives to the present: * ''Sequoiadendron giganteum'', extant, commonly known as wellingtonia, giant redwood and giant sequoia, growing naturally in the Sierra Nevada of California * † ''Sequoiadendron chaneyi'', extinct, the predecessor of ''Sequoiadendron giganteum'', found mostly in the Nevada part of the Tertiary Colorado Plateau until the late Miocene Fossil record file:Sequoiadendron chaneyi.jpg, left, up ''Sequoiadendron chaneyi'' foliage fossil, Nevada ''Sequoiadendron'' fossil pollen and macrofossils may have been found as early as the Cretaceous and throughout the Northern Hemisphere, including locations in western Georgia in the Caucasus The Caucasus () or Caucasia (), is a region between the Black Sea and the Caspian Sea, mainly comprising Armenia, Azerbaijan, Georgia, and parts of Southern Russia. The Caucasus Mountains, including the Greater Caucasus range, have historicall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stephan Endlicher
Stephan Ladislaus Endlicher also known as Endlicher István László (24 June 1804, Bratislava (Pozsony) – 28 March 1849, Vienna) was an Austrian botanist, numismatist and Sinologist. He was a director of the Botanical Garden of Vienna. Biography Endlicher studied theology and received minor orders. In 1828 he was appointed to the Austrian National Library to reorganize its manuscript collection. Concurrently he studied natural history, in particular botany, and East-Asian languages. In 1836, Endlicher was appointed keeper of the court cabinet of natural history, and in 1840 he became professor at the University of Vienna and director of its Botanical Garden A botanical garden or botanic gardenThe terms ''botanic'' and ''botanical'' and ''garden'' or ''gardens'' are used more-or-less interchangeably, although the word ''botanic'' is generally reserved for the earlier, more traditional gardens, an .... He wrote a comprehensive description of the plant kingdom accordin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cherokee Syllabary
The Cherokee syllabary is a syllabary invented by Sequoyah in the late 1810s and early 1820s to write the Cherokee language. His creation of the syllabary is particularly noteworthy as he was illiterate until the creation of his syllabary. He first experimented with logograms, but his system later developed into a syllabary. In his system, each symbol represents a syllable rather than a single phoneme; the 85 (originally 86) characters provide a suitable method for writing Cherokee. Although some symbols resemble Latin, Greek, Cyrillic, and Glagolitic letters, they are not used to represent the same sounds. Description Each of the characters represents one syllable, as in the Japanese ''kana'' and the Bronze Age Greek Linear B writing systems. The first six characters represent isolated vowel syllables. Characters for combined consonant and vowel syllables then follow. The charts below show the syllabary in recitation order, left to right, top to bottom as arranged by Samuel W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sequoyah
Sequoyah (Cherokee language, Cherokee: ᏍᏏᏉᏯ, ''Ssiquoya'', or ᏎᏉᏯ, ''Se-quo-ya''; 1770 – August 1843), also known as George Gist or George Guess, was a Native Americans in the United States, Native American polymath of the Cherokee Nation. In 1821, he completed his independent creation of the Cherokee syllabary, making Reading (process), reading and writing in Cherokee possible. His achievement was one of the few times in recorded history that an individual who was a member of a pre-literate group created an original, effective writing system. His creation of the syllabary allowed the Cherokee nation to be one of the first North American Indigenous groups to have a written language. Sequoyah was also an important representative for the Cherokee nation, by going to Washington, D.C. to sign two relocations and trading of land treaties. After seeing its worth, the people of the Cherokee Nation (19th century), Cherokee Nation rapidly began to use his syllabary and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Josiah Whitney
Josiah Dwight Whitney (November 23, 1819 – August 18, 1896) was an American geologist, professor of geology at Harvard University (from 1865), and chief of the California Geological Survey (1860–1874). Through his travels and studies in the principal mining regions of the United States, Whitney became the foremost authority of his day on the economic geology of the U.S. Mount Whitney, the highest point in the contiguous 48 United States, and the Whitney Glacier, the first confirmed glacier in the United States, on Mount Shasta, were both named after him by members of the Survey. Early years Whitney was born November 23, 1819, in Northampton, Massachusetts, the oldest of 12 children. His father was Josiah Dwight Whitney (1786–1869) of the New England Dwight family. His mother was Sarah Williston (1800–1833). He was the brother of grammarian and lexicographer William Dwight Whitney (1827–1894). He was educated at a series of schools in Northampton, Plainfield, Round H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
