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Mustela Haidarum
The Haida ermine (''Mustela haidarum'') is a mustelid species endemic to a few islands off the Pacific Northwest of North America, namely Haida Gwaii in Canada and the southern Alexander Archipelago in the U.S. state of Alaska. Indigenous names In the Haida language, this species is known as ''daayáats’'' in its brown summer coat and ''tlag'' in its winter coat. Taxonomy The three subspecies of the Haida ermine were originally considered subspecies of the common stoat ('' M. erminea''). However, in 2013, they were recognized as distinct from any other ermine, and a 2021 study further found them to comprise a distinct species. ''M. haidarum'' is thought have originated about 375,000 years ago (during the Pleistocene), and is thought to be the result of ancient hybrid speciation between the Beringian ermine (''M. erminea'') and American ermine (''M. richardsonii''). The islands are thought to have been glacial refugia during the Last Glacial Maximum, wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edward Alexander Preble
Edward Alexander Preble (June 11, 1871 – October 4, 1957) was an American naturalist and conservation movement, conservationist. Born in Somerville, Massachusetts, he is noted for work in studying birds and mammals of the Pacific Northwest. He also acted as an editor for nature magazines. In 1908, Preble published a report on the natural history of the Boreal forest of Canada. This monograph was based his two expeditions, in 1901 and again in 1903–04, with the United States Fish and Wildlife Service, U.S. Biological Survey. In 1925, Preble became a Consulting Naturalist for Nature (journal), ''Nature''. When he retired from government service, in 1935, he became one of the journal's Associate Editors—a position he held until his death on October 4, 1957. References External links * American naturalists American mammalogists 1871 births 1957 deaths {{US-zoologist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Last Glacial Maximum
The Last Glacial Maximum (LGM), also referred to as the Last Glacial Coldest Period, was the most recent time during the Last Glacial Period where ice sheets were at their greatest extent between 26,000 and 20,000 years ago. Ice sheets covered much of Northern North America, Northern Europe, and Asia and profoundly affected Earth's climate by causing a major expansion of deserts, along with a large drop in sea levels. Based on changes in position of ice sheet margins dated via cosmogenic nuclide, terrestrial cosmogenic nuclides and radiocarbon dating, growth of ice sheets in the southern hemisphere commenced 33,000 years ago and maximum coverage has been estimated to have occurred sometime between 26,500 years ago and 20,000 years ago. After this, deglaciation caused an abrupt rise in sea level. Decline of the West Antarctica ice sheet occurred between 14,000 and 15,000 years ago, consistent with evidence for another abrupt rise in the sea level about 14,500 years ago. Glacier fl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parvoviridae
Parvoviruses are a family of animal viruses that constitute the family ''Parvoviridae''. They have linear, single-stranded DNA (ssDNA) genomes that typically contain two genes encoding for a replication initiator protein, called NS1, and the protein the viral capsid is made of. The coding portion of the genome is flanked by telomeres at each end that form into Stem-loop, hairpin loops that are important during replication. Parvovirus virions are small compared to most viruses, at 23–28 nanometers in diameter, and contain the genome enclosed in an icosahedral capsid that has a rugged surface. Parvoviruses enter a host cell by endocytosis, travelling to the nucleus where they wait until the cell enters its replication stage. At that point, the genome is uncoated and the coding portion is replicated. Viral messenger RNA (mRNA) is then Transcription (biology), transcribed and Translation (biology), translated, resulting in NS1 initiating replication. During replication, the hairpi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canine Distemper
Canine distemper (CDV) (sometimes termed "footpad disease") is a viral disease that affects a wide variety of mammal families, including domestic and wild species of dogs, coyotes, foxes, pandas, wolves, ferrets, skunks, raccoons, and felines, as well as pinnipeds, some primates, and a variety of other species. CDV does not affect humans. In canines, CDV affects several body systems, including the gastrointestinal and respiratory tracts, the spinal cord, and the brain. Common symptoms include high fever, eye inflammation and eye/nose discharge, labored breathing and coughing, vomiting and diarrhea, loss of appetite and lethargy, and hardening of the nose and footpads. The viral infection can be accompanied by secondary bacterial infections and can eventually present serious neurological symptoms. Canine distemper is caused by a single-stranded RNA virus of the family ''Paramyxoviridae'' (the same family of viruses that causes measles, mumps, and bronchiolitis in humans). T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spillover Infection
Spillover infection, also known as pathogen spillover and spillover event, occurs when a reservoir population with a high pathogen prevalence comes into contact with a novel host population. The pathogen is transmitted from the reservoir population and may or may not be transmitted within the host population. Due to climate change and land use expansion, the risk of viral spillover is predicted to significantly increase. Spillover zoonoses Spillover is a common event; in fact, more than two-thirds of human viruses are zoonotic. Most spillover events result in self-limited cases with no further human-to-human transmission, as occurs, for example, with rabies, anthrax, histoplasmosis or hydatidosis. Other zoonotic pathogens are able to be transmitted by humans to produce secondary cases and even to establish limited chains of transmission. Some examples are the Ebola and Marburg filoviruses, the MERS and SARS coronaviruses and some avian flu viruses. Finally, some spillover eve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tongass National Forest
The Tongass National Forest () in Southeast Alaska is the largest U.S. National Forest at , an expanse larger than 10 U.S. states and 75 U.N. member nations. Most of its area is temperate rain forest and is remote enough to be home to many species of endangered and rare flora and fauna. The Tongass, which is managed by the United States Forest Service, encompasses islands of the Alexander Archipelago, fjords and glaciers, and peaks of the Coast Mountains. An international border with Canada (British Columbia) runs along the crest of the Boundary Ranges of the Coast Mountains. The forest is administered from Forest Service headquarters offices in Ketchikan. There are local ranger district offices located in Craig, Hoonah, Juneau, Ketchikan, Petersburg, Sitka, Thorne Bay, Wrangell, and Yakutat. History The Alexander Archipelago Forest Reserve was established by Theodore Roosevelt in a presidential proclamation of 20 August 1902. Another presidential proclamation made ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temperate Rainforest
Temperate rainforests are rainforests with coniferous or Broad-leaved tree, broadleaf forests that occur in the temperate zone and receive heavy rain. Temperate rainforests occur in oceanic moist regions around the world: the Pacific temperate rainforests of North American Pacific Northwest as well as the Appalachian temperate rainforest in the Appalachian region of the United States; the Valdivian temperate rainforests of southwestern South America; the rainforests of New Zealand and southeastern Australia; northwest Europe (small pockets in Great Britain and larger areas in Ireland, southern Norway, northern Iberia and Brittany); southern Japan; the Black Sea–Caspian Sea region from the southeasternmost coastal zone of the Bulgarian Black Sea Coast, Bulgarian coast, through Turkey, to Georgia (country), Georgia, and northern Iran. The moist conditions of temperate rainforests generally have an understory of mosses, ferns and some shrubs and berries. Temperate rainforests can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suemez Island
Suemez Island is located in the Alexander Archipelago of southeastern Alaska, United States. It resides in the west-central coast of Prince of Wales Island. The northern tip of Dall Island lies to its southeast, while Baker Island lies to its northwest. Suemez Island has a land area of 151.713 km2 (58.5768 sq mi) and was unpopulated at the 2000 census. The Tlevak Strait-Suemez Island volcano at 55°15′0″N, 133°18′0″W is 50 metres (164 feet) high. Suemez Island was named sometime between 1775 and 1779 by Juan Francisco de la Bodega y Quadra and Francisco Antonio Mourelle as "Isla Suemez". Dionisio Alcalá Galiano called it "Guemes" in his map published in 1802, which may be the proper spelling. The name "Guemes" honors Juan Vicente de Güemes Padilla Horcasitas y Aguayo, Viceroy of New Spain New Spain, officially the Viceroyalty of New Spain ( ; Nahuatl: ''Yankwik Kaxtillan Birreiyotl''), originally the Kingdom of New Spain, was an integral territorial enti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prince Of Wales Island (Alaska)
Prince of Wales Island (Tlingit: ''Taan'') is one of the islands of the Alexander Archipelago in the Alaska Panhandle. It is the fourth-largest island in the United States (after Hawaii, Kodiak Island, and Puerto Rico) and the 97th-largest island in the world. Geography and ecology Prince of Wales Island is located in the Prince of Wales-Hyder Census Area. It measures long by wide, with an area of , or about one-tenth the size of Ireland (or slightly larger than the state of Delaware). Approximately 6,000 people live on the island. Craig is the largest community; founded as a saltery in the early 20th century, it has a population of 1,500 people. Some 900 more live in Klawock, a long-established village that grew with the boom of the fishing industry. Hollis was a boom-and-bust mining town, most active from 1900 to about 1915. Abandoned, it was re-established as a logging camp in the 1950s; it now has a population of about 100, and is the location of a ferry terminal. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moresby Island
Moresby Island () is a large island () that forms part of the Haida Gwaii archipelago (formerly known as Queen Charlotte Islands) in British Columbia, Canada, located at It is separated by the narrow Skidegate Channel from the other principal island of the group to the north, Graham Island. Gwaii Haanas National Park Reserve and Haida Heritage Site includes Moresby and other islands. The island, together with numerous nearby smaller islands and islets in the southern archipelago, is defined by Statistics Canada as North Coast E, Regional district electoral area, with a population of 325 as of the 2021 Canadian census, 2010 census. Almost all of its population, 310 people, resided in the unincorporated community of Sandspit, British Columbia, Sandspit, on the northeast corner of Moresby. The total land area of the electoral area is . Moresby Island is the List of islands by area, 175th largest island in the world, and List of Canadian islands by area, the 32nd largest island ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graham Island
Graham Island () is the largest island in the Haida Gwaii archipelago (previously known as the Queen Charlotte Islands), lying off the mainland coast of British Columbia, Canada. It is separated by the narrow Skidegate Channel from the other principal island of the group to the south, Moresby Island (''T'aaxwii X̱aaydag̱a Gwaay.yaay linag̱waay'' in the language of the Haida people). It has a population of 3,858 (2016 census), an area of , and is the 101st largest island in the world and Canada's 22nd largest island. Graham Island was named in 1853 by James Charles Prevost, commander of HMS ''Virago'', for Sir James Graham, 2nd Baronet, who was First Lord of the Admiralty at the time. Communities * Daajing Giids (formerly known as ''Queen Charlotte City'') * Juskatla * Masset * Old Massett * Port Clements * Skidegate Skidegate () is a Haida people, Haida community in in British Columbia, Canada. It is on the southeast coast of Graham Island, the largest island in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southeast Alaska
Southeast Alaska, often abbreviated to southeast or southeastern, and sometimes called the Alaska(n) panhandle, is the southeastern portion of the U.S. state of Alaska, bordered to the east and north by the northern half of the Canadian province of British Columbia (and a small part of Yukon). The majority of southeast Alaska is situated in Tlingit Aaní, much of which is part of the Tongass National Forest, the United States' largest national forest. In many places, the international border runs along the crest of the Boundary Ranges of the Coast Mountains (see Alaska boundary dispute). The region is noted for its scenery and mild, rainy climate. The largest cities in the region are Juneau, Sitka, and Ketchikan. This region is also home to Hyder, the easternmost town in Alaska. Geography Southeast Alaska has a land area of , comprising much of the Alexander Archipelago. The largest islands are, from North to South, Chichagof Island, Admiralty Island, Baranof Is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
