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Alexander Archipelago Wolf
The Alexander Archipelago wolf (''Canis lupus ligoni''), also known as the Islands wolf, Sitnews.us (2008-07-11). Retrieved on 2012-12-31. is a subspecies of the gray . The coastal wolves of southeast Alaska inhabit the area that includes the , its islands, and a narrow strip of rugged coastline that is biologically isolated from the rest of North America by the Coast Mountains.< ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subspecies Of Canis Lupus
There are 38 subspecies of ''Canis lupus'' listed in the taxonomic authority ''Mammal Species of the World'' (2005, 3rd edition). These subspecies were named over the past 250 years, and since their naming, a number of them have gone extinct. The nominate subspecies is the Eurasian wolf (''Canis lupus lupus''). Taxonomy In 1758, the Swedish botanist and zoologist Carl Linnaeus published in his ''Systema Naturae'' the binomial nomenclature – or the two-word naming – of species. ''Canis'' is the Latin word meaning "dog", and under this genus he listed the dog-like carnivores including domestic dogs, wolves, and jackals. He classified the domestic dog as ''Canis familiaris'', and on the next page he classified the wolf as ''Canis lupus''. Linnaeus considered the dog to be a separate species from the wolf because of its head and body and tail ''cauda recurvata'' - its upturning tail - which is not found in any other canid. In 1999, a study of mitochondrial DNA indicated that th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sitka Deer
The Sitka deer or Sitka black-tailed deer (''Odocoileus hemionus sitkensis'') is a subspecies of mule deer (''Odocoileus hemionus''), similar to the Columbian black-tailed subspecies (''O. h. colombianus''). Their name originates from Sitka, Alaska, and it is not to be confused with the similarly named sika deer. Weighing in on average between , Sitka deer are characteristically smaller than other subspecies of mule deer. Reddish-brown in the summer, their coats darken to a gray-brown in mid- to late August. They are also good swimmers, and can occasionally be seen crossing deep channels between islands. Their average lifespan is about 10 years, but a few are known to have attained an age of 15. Habitat and life patterns Sitka deer inhabit the coastal rainforests of northern British Columbia and southeastern Alaska. Their natural distribution included the Alexander Archipelago in Alaska and the adjacent mainland coast north to Yakutat. They were also introduced to Haida Gwai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frank Murkowski
Frank Hughes Murkowski (born March 28, 1933) is an American politician and a member of the Republican Party. He was a United States Senator from Alaska from 1981 until 2002 and the eighth governor of Alaska from 2002 until 2006. In his 2006 re-election bid, he finished in third place in the Republican primary behind Sarah Palin and John Binkley. Murkowski is notable for having appointed his daughter, Lisa Murkowski, to replace him in the U.S. Senate after he resigned his Senate seat to become governor of Alaska. Early life and education Murkowski was born in Seattle, Washington, the son of Helen (née Hughes) and Frank M. Murkowski. His paternal grandfather was of Polish descent. Murkowski attended Ketchikan High School in Alaska, graduating in 1951. He studied at Santa Clara University from 1951 to 1953, and earned a BS in economics from Seattle University in 1955. He joined the United States Coast Guard in the summer of 1955 and served until 1957 – the year his daughter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ted Stevens
Theodore Fulton Stevens Sr. (November 18, 1923 – August 9, 2010) was an American politician and lawyer who served as a U.S. Senator from Alaska from 1968 to 2009. He was the longest-serving Republican Senator in history at the time he left office, though his record was later surpassed in January 2017 by Utah Senator Orrin Hatch. He was the president pro tempore of the United States Senate in the 108th and 109th Congresses from January 3, 2003, to January 3, 2007, and was the third U.S. Senator to hold the title of president pro tempore emeritus. He was previously Solicitor of the Department of the Interior from September 1960 to January 1961. Stevens served for six decades in the American public sector, beginning with his service as a pilot in World WarII. In 1952, his law career took him to Fairbanks, Alaska, where he was appointed U.S. Attorney the following year by President Dwight D. Eisenhower. In 1956, he returned to Washington, D. C., to work in the Eisenhower Inter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red-tailed Hawk
The red-tailed hawk (''Buteo jamaicensis'') is a bird of prey that breeds throughout most of North America, from the interior of Alaska and northern Canada to as far south as Panama and the West Indies. It is one of the most common members within the genus of ''Buteo'' in North America or worldwide. The red-tailed hawk is one of three species colloquially known in the United States as the " chickenhawk", though it rarely preys on standard-sized chickens. The bird is sometimes also referred to as the red-tail for short, when the meaning is clear in context. Red-tailed hawks can acclimate to all the biomes within their range, occurring on the edges of non-ideal habitats such as dense forests and sandy deserts.Preston, C. R. (2000). ''Red-tailed Hawk''. Stackpole Books. The red-tailed hawk occupies a wide range of habitats and altitudes, including deserts, grasslands (from small meadows to the treed fringes of more extensive prairies), coniferous and deciduous forests, agricultur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jack Ward Thomas
Jack Ward Thomas (September 7, 1934 – May 26, 2016) was the thirteenth chief of the U.S. Forest Service, serving during the Clinton administration years of 1993–1996. He was born in Fort Worth, Texas. His undergraduate education and degree (a BS in wildlife management in 1957) was from Texas A&M University. He worked for the Texas Parks and Wildlife Department for ten years. Then while working as a USFS research biologist at Morgantown, West Virginia, he received an MS in wildlife ecology from West Virginia University. He headed a Forest Service research unit at the University of Massachusetts in Amherst. He received his PhD in forestry there in 1972. In 1974, he moved to La Grande, Oregon, working as the chief research wildlife biologist and program leader at the USFS Forestry and Range Sciences Laboratory. On December 1, 1993, he was appointed Chief of the U.S. Forest Service. During his time as head of the USFS, the Northwest Forest Plan was adopted. Jack became a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minimum Viable Population
Minimum viable population (MVP) is a lower bound on the population of a species, such that it can survive in the wild. This term is commonly used in the fields of biology, ecology, and conservation biology. MVP refers to the smallest possible size at which a biological population can exist without facing extinction from natural disasters or demographic, environmental, or genetic stochasticity. The term "population" is defined as a group of interbreeding individuals in similar geographic area that undergo negligible gene flow with other groups of the species. Typically, MVP is used to refer to a wild population, but can also be used for ex-situ conservation (Zoo populations). Estimation There is no unique definition of what is a sufficient population for the continuation of a species, because whether a species survives will depend to some extent on random events. Thus any calculation of a minimum viable population (MVP) will depend on the population projection model used. A set of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biologist
A biologist is a scientist who conducts research in biology. Biologists are interested in studying life on Earth, whether it is an individual cell, a multicellular organism, or a community of interacting populations. They usually specialize in a particular branch (e.g., molecular biology, zoology, and evolutionary biology) of biology and have a specific research focus (e.g., studying malaria or cancer). Biologists who are involved in basic research have the aim of advancing knowledge about the natural world. They conduct their research using the scientific method, which is an empirical method for testing hypotheses. Their discoveries may have applications for some specific purpose such as in biotechnology, which has the goal of developing medically useful products for humans. In modern times, most biologists have one or more academic degrees such as a bachelor's degree plus an advanced degree like a master's degree or a doctorate. Like other scientists, biologists can be fou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Logging
Logging is the process of cutting, processing, and moving trees to a location for transport. It may include skidding, on-site processing, and loading of trees or logs onto trucks or skeleton cars. Logging is the beginning of a supply chain that provides raw material for many products societies worldwide use for housing, construction, energy, and consumer paper products. Logging systems are also used to manage forests, reduce the risk of wildfires, and restore ecosystem functions, though their efficiency for these purposes has been challenged. In forestry, the term logging is sometimes used narrowly to describe the logistics of moving wood from the stump to somewhere outside the forest, usually a sawmill or a lumber yard. In common usage, however, the term may cover a range of forestry or silviculture activities. Illegal logging refers to the harvesting, transportation, purchase, or sale of timber in violation of laws. The harvesting procedure itself may be illegal, includin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Forest Service
The United States Forest Service (USFS) is an agency of the U.S. Department of Agriculture that administers the nation's 154 national forests and 20 national grasslands. The Forest Service manages of land. Major divisions of the agency include the Chief's Office, National Forest System, State and Private Forestry, Business Operations, and Research and Development. The agency manages about 25% of federal lands and is the only major national land management agency not part of the U.S. Department of the Interior, which manages the National Park Service, the U.S. Fish and Wildlife Service, and the Bureau of Land Management. History The concept of national forests was born from Theodore Roosevelt's conservation group, Boone and Crockett Club, due to concerns regarding Yellowstone National Park beginning as early as 1875. In 1876, Congress formed the office of Special Agent in the Department of Agriculture to assess the quality and conditions of forests in the United States. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecological Stability
In ecology, an ecosystem is said to possess ecological stability (or equilibrium) if it is capable of returning to its equilibrium state after a perturbation (a capacity known as resilience) or does not experience unexpected large changes in its characteristics across time. Although the terms community stability and ecological stability are sometimes used interchangeably, community stability refers only to the characteristics of communities. It is possible for an ecosystem or a community to be stable in some of their properties and unstable in others. For example, a vegetation community in response to a drought might conserve biomass but lose biodiversity. Stable ecological systems abound in nature, and the scientific literature has documented them to a great extent. Scientific studies mainly describe grassland plant communities and microbial communities. Nevertheless, it is important to mention that not every community or ecosystem in nature is stable (for example, wolves and mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Climate Variability
Climate variability includes all the variations in the climate that last longer than individual weather events, whereas the term climate change only refers to those variations that persist for a longer period of time, typically decades or more. ''Climate change'' may refer to any time in Earth's history, but the term is now commonly used to describe contemporary climate change. Since the Industrial Revolution, the climate has increasingly been affected by human activities. The climate system receives nearly all of its energy from the sun and radiates energy to outer space. The balance of incoming and outgoing energy and the passage of the energy through the climate system is Earth's energy budget. When the incoming energy is greater than the outgoing energy, Earth's energy budget is positive and the climate system is warming. If more energy goes out, the energy budget is negative and Earth experiences cooling. The energy moving through Earth's climate system finds expression ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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