|
Balsam Woolly Adelgid
The balsam woolly adelgid (''Adelges piceae'') is small wingless insect that infests and kills firs. In their native Europe they are a minor parasite on silver fir and Sicilian fir, but they have become a threat especially to balsam fir and Fraser fir after they were introduced to the United States around the beginning of the 20th century. Because this species is not native to North America, the Fraser fir has not evolved any type of defense against it. Reproduction These insects typically lay about one hundred eggs and have three generations per year. The adelgid attacks the tree by feeding in fissures within the bark of trees larger than about four centimeters in diameter at breast height. As it feeds, it releases toxins contained within its saliva. These toxins reduce the conductance of sapwood being built, which causes water stress and kills the trees. Impact The Great Smoky Mountains National Park, straddling North Carolina and Tennessee in the Southeastern United Stat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Julius Theodor Christian Ratzeburg
Julius Theodor Christian Ratzeburg (16 February 1801– 24 October 1871) was a German zoology, zoologist, botany, botanist, entomology, entomologist, and forestry, forester. Biography Ratzeburg was born in Berlin, the son of a professor at the veterinary school of the Humboldt University of Berlin, University of Berlin. He studied medicine and natural sciences in Berlin and was primarily interested in botany. He became a privatdocent, private lecturer at the University of Berlin in 1828, when he was in contact with Alexander von Humboldt, Alexander and Wilhelm von Humboldt. Two years later, he became professor of natural history there at the invitation of Friedrich Wilhelm Leopold Pfeil (1783-1859). He founded the botanic garden of forestry at Eberswalde, working there until his retirement in 1869. He returned to Berlin, where he resided until his death. Ratzeburg was the author of important works on forestry and forest entomology, and is considered the founder of the latter d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Understory
In forestry and ecology, understory (American English), or understorey (English in the Commonwealth of Nations, Commonwealth English), also known as underbrush or undergrowth, includes plant life growing beneath the Canopy (biology), forest canopy without penetrating it to any great extent, but above the forest floor. Only a small percentage of light penetrates the canopy, so understory vegetation is generally Shade tolerance, shade-tolerant. The understory typically consists of trees stunted through lack of light, other small trees with low light requirements, saplings, shrubs, vines, and undergrowth. Small trees such as holly and Cornus (genus), dogwood are understory specialists. In Temperate broadleaf and mixed forest, temperate deciduous forests, many understory plants start into growth earlier in the year than the canopy trees, to make use of the greater availability of light at that particular time of year. A gap in the canopy caused by the death of a tree stimulates the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cascade Range
The Cascade Range or Cascades is a major mountain range of western North America, extending from southern British Columbia through Washington (state), Washington and Oregon to Northern California. It includes both non-volcanic mountains, such as many of those in the North Cascades, and the notable volcanoes known as the High Cascades. The small part of the range in British Columbia is referred to as the Canadian Cascades or, locally, as the Cascade Mountains. The highest peak in the range is Mount Rainier in Washington at . part of the Pacific Ocean's Ring of Fire, the ring of volcanoes and associated mountains around the Pacific Ocean. All of the eruptions in the contiguous United States over the last 200 years have been from the Cascade Volcanoes. The two most recent were Lassen Peak from 1914 to 1921 and a 1980 eruption of Mount St. Helens, major eruption of Mount St. Helens in 1980. Minor eruptions of Mount St. Helens have also occurred since, most recently from 2004 to 2008. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oregon
Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of its eastern boundary with Idaho. The 42nd parallel north, 42° north parallel delineates the southern boundary with California and Nevada. The western boundary is formed by the Pacific Ocean. Oregon has been home to many Indigenous peoples of the Americas, indigenous nations for thousands of years. The first European traders, explorers, and settlers began exploring what is now Oregon's Pacific coast in the early to mid-16th century. As early as 1564, the Spanish expeditions to the Pacific Northwest, Spanish began sending vessels northeast from the Philippines, riding the Kuroshio Current in a sweeping circular route across the northern part of the Pacific. In 1592, Juan de Fuca undertook detailed mapping a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington (state)
Washington, officially the State of Washington, is a U.S. state, state in the Pacific Northwest region of the United States. It is often referred to as Washington State to distinguish it from Washington, D.C., the national capital, both named after George Washington (the first President of the United States, U.S. president). Washington borders the Pacific Ocean to the west, Oregon to the south, Idaho to the east, and shares Canada–United States border, an international border with the Provinces and territories of Canada, Canadian province of British Columbia to the north. Olympia, Washington, Olympia is the List of capitals in the United States, state capital, and the most populous city is Seattle. Washington is the List of U.S. states and territories by area, 18th-largest state, with an area of , and the List of U.S. states and territories by population, 13th-most populous state, with a population of just less than 8 million. The majority of Washington's residents live ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abies Lasiocarpa
''Abies lasiocarpa'', the subalpine fir or Rocky Mountain fir, is a western North American fir tree. Description ''Abies lasiocarpa'' is a medium-sized evergreen conifer with a very narrow conic crown, growing to tall, exceptionally , with a trunk up to thick, exceptionally . The bark on young trees is smooth, gray, and with resin blisters, becoming rough and fissured or scaly on old trees. The lowest branches can be observed growing above ground level. The leaves are flat and needle-like, long, glaucous green above with a broad stripe of stomata, and two blue-white stomatal bands below; the fresh leaf scars are reddish (tan on the inland variety). They are arranged spirally on the shoot, but with the leaf bases twisted to be arranged to the sides of and above the shoot, with few or none below the shoot. The cones are erect, long, dark purple with fine yellow-brown pubescence, ripening brown and disintegrating to release the winged seeds in early fall. Taxonomy There are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abies Amabilis
''Abies amabilis'', commonly known as the Pacific silver fir, is a fir native to the Pacific Northwest of North America, occurring in the Pacific Coast Ranges and the Cascade Range. It is also commonly referred to in English as the white fir, red fir, lovely fir, amabilis fir, Cascades fir, or silver fir. Description The tree is a large evergreen conifer growing to , exceptionally tall, and with a trunk diameter of up to , exceptionally . The Bark (botany), bark on younger trees is light grey, thin and covered with resin blisters. On older trees, it darkens and develops scales and furrows. The leaves are needle-like, flattened, long and wide by thick, dark green above, and with two white bands of stomata below, and slightly notched at the tip. The leaf arrangement is spiral on the shoot, but with each leaf variably twisted at the base so they lie flat to either side of and above the shoot, with none below the shoot. The shoots are orange-red with dense velvety pubescence. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abies Grandis
''Abies grandis'' (grand fir, giant fir, lowland white fir, great silver fir, western white fir, Vancouver fir, or Oregon fir) is a fir native to northwestern North America, occurring at altitudes of sea level to . It is a major constituent of the Grand Fir/Douglas Fir Ecoregion of the Cascade Range. The tree typically grows to in height, and may be the tallest ''Abies'' species in the world. There are two varieties, the taller coast grand fir, found west of the Cascade Mountains, and the shorter interior grand fir, found east of the Cascades. It was first described in 1831 by David Douglas. It is closely related to white fir. The bark was historically believed to have medicinal properties, and it is popular in the United States as a Christmas tree. Its lumber is a softwood, and it is harvested as a hem fir. It is used in paper-making, as well as construction for framing and flooring, where it is desired for its resistance to splitting and splintering. Description ''Abi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific Northwest
The Pacific Northwest (PNW; ) is a geographic region in Western North America bounded by its coastal waters of the Pacific Ocean to the west and, loosely, by the Rocky Mountains to the east. Though no official boundary exists, the most common conception includes the U.S. states of Oregon, Washington (state), Washington, Idaho, and the Canadian province of British Columbia. Some broader conceptions reach north into Alaska and Yukon, south into Northern California, and east into western Montana. Other conceptions may be limited to the coastal areas west of the Cascade Mountains, Cascade and Coast Mountains, Coast mountains. The Northwest Coast is the coastal region of the Pacific Northwest, and the Northwest Plateau (also commonly known as "British Columbia Interior, the Interior" in British Columbia), is the inland region. The term "Pacific Northwest" should not be confused with the Northwest Territory (also known as the Great Northwest, a historical term in the United States) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asheville Citizen-Times
The ''Asheville Citizen-Times'' is a daily newspaper of Asheville, North Carolina. It was formed in 1991 as a result of a merger of the morning ''Asheville Citizen'' and the afternoon ''Asheville Times''. It is owned by Gannett. History Founded in 1870 as a weekly, the ''North Carolina Citizen'' became a daily newspaper in 1885. Writers Thomas Wolfe, O. Henry, both buried in Asheville, and F. Scott Fitzgerald, a frequent visitor to Asheville, frequently could be found in the newsroom in earlier days. In 1930 the ''Citizen'' came under common ownership with the ''Times'', which was first established in 1896 as the ''Asheville Gazette''. The latter paper merged with a short-lived rival, the ''Asheville Evening News'', to form the ''Asheville Gazette-News'' and was renamed ''The Asheville Times'' by new owner Charles A. Webb. The ''Citizen'' was in a former YMCA and the press was in the swimming pool. The ''Times'' was in the Jackson Building (Asheville, North Carolina), Jackson ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kuwohi
Kuwohi (, also known as Clingmans Dome, its former official name) is a mountain in the Great Smoky Mountains of Tennessee and North Carolina in the Southeastern United States. At an topographical summit, elevation of , it is the highest mountain in the Great Smoky Mountains National Park, the highest point in the state of Tennessee, and the highest point along the Appalachian Trail. It is also the third highest point in eastern mainland North America, after Mount Mitchell () and Mount Craig (North Carolina), Mount Craig (). Description Kuwohi has two subpeaks: Mount Buckley to the west and Mount Love to the east. The headwaters of several substantial streams are located on the slopes of Kuwohi, including Little River (Tennessee), Little River on the north slope, and Forney Creek and Noland Creek, both of which are tributaries of the Tuckasegee River, on the south slope. The mountain is located entirely within the Tennessee Valley, watershed of the Tennessee River.National Par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spruce-fir Moss Spider
The spruce-fir moss spider (''Microhexura montivaga'') is an endangered species of spider found at high elevations in the southern Appalachian Mountains. First identified in 1923, it inhabits moss that grows on rocks underneath the forest canopy. Description ''M. montivaga'' is one of the smallest mygalomorph spiders, with adults measuring only 3 to 4 mm (about 1/8 inch). The coloration varies from light brown to yellow-brown to a darker reddish brown, with no markings on the abdomen. The chelicerae project forward, and one pair of spinnerets is very long. It possesses a second pair of book lungs, which appear as light patches behind the genital furrow. Distribution and habitat ''M. multivaga'' is known from Fraser fir and red spruce forests on mountain peaks at and above in the Southern Appalachian Mountains of North Carolina, Virginia and Tennessee. It has been recorded from Kuwohi and Mount Collins (both very small populations), Mount Le Conte, Mount Mitchell (wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
