Habitat

A habitat is an ecological or environmental area that is inhabited by a particular species of animal, plant, or other type of organism.A place where a living thing lives is its habitat. It is a place where it can find food, shelter, protection and mates for reproduction. It is the natural environment in which an organism lives, or the physical environment that surrounds a species population.

A habitat is made up of physical factors such as soil, moisture, range of temperature, and availability of light as well as biotic factors such as the availability of food and the presence of predators. A habitat is not necessarily a geographic area—for a parasitic organism it is the body of its host, part of the host's body such as the digestive tract, or a cell within the host's body.

Microhabitat

A microhabitat is the small-scale physical requirements of a particular organism or population.

Monotypic habitat

The monotypic habitat occurs in botanical and zoological contexts, and is a component of conservation biology. In restoration ecology of native plant communities or habitats, some invasive species create monotypic stands that replace and/or prevent other species, especially indigenous ones, from growing there. A dominant colonization can occur from retardant chemicals exuded, nutrient monopolization, or from lack of natural controls such as herbivores or climate, that keep them in balance with their native habitats. The yellow starthistle, Centaurea solstitialis, is a botanical monotypic-habitat example of this, currently dominating over 15,000,000 acres (61,000 km²) in California alone. The non-native freshwater zebra mussel, Dreissena polymorpha, that colonizes areas of the Great Lakes and the Mississippi River watershed, without its home-range predator control, is a zoological monotypic-habitat example. Even though its name may seem to imply simplicity as compared with polytypic habitats, the monotypic habitat can be complex.

Ecology

Ecology (from Greek: οἶκος, "house", or "environment"; -λογία, "study of") is the scientific analysis and study of interactions among organisms and their environment. It is an interdisciplinary field that includes biology, geography and Earth science. Ecology includes the study of interactions organisms have with each other, other organisms, and with abiotic components of their environment. Topics of interest to ecologists include the diversity, distribution, amount (biomass), and number (population) of particular organisms, as well as cooperation and competition between organisms, both within and among ecosystems. Ecosystems are composed of dynamically interacting parts including organisms, the communities they make up, and the non-living components of their environment. Ecosystem processes, such as primary production, pedogenesis, nutrient cycling, and various niche construction activities, regulate the flux of energy and matter through an environment. These processes are sustained by organisms with specific life history traits, and the variety of organisms is called biodiversity. Biodiversity, which refers to the varieties of species, genes, and ecosystems, enhances certain ecosystem services.

Ecology (disambiguation)

Ecology is the scientific study of the distribution and abundance of organisms and their interactions with their environment.

Ecology may also refer to:

Journals

Organisations

Music

See also

List of My Name Is Earl episodes

The NBC sitcom My Name Is Earl ran from September 20, 2005 to May 19, 2009 for a total of four seasons, and 96 episodes.

Series overview

Episodes

Season 1: 2005–06

Season 2: 2006–07

Season 3: 2007–08

Season 4: 2008–09

References

External links

Habitat (magazine)

Habitat is an American real estate magazine founded in 1982 and aimed at co-op boards, condominium associations, and related professionals such as attorneys and managing agents. The print magazine concentrates on the greater New York City metropolitan area while its Web site contains features for general-interest co-op/condo directors, residents, and buyers/sellers.

Publication history

Journalist Carol J. Ott founded what was then titled N.Y. Habitat in New York City in 1982, for a primary audience of co-op and loft owners/renters. The magazine had evolved from Ott's 1980-82 newspaper, The Loft Letter. Originally bimonthly, in 1997 the publication schedule increased to 11 times yearly, with one double-issue. As of 2011, Ott remains publisher and editor-in-chief. The operations manager is Jennifer Wu.

Editorial and art

Habitat publishes both human-interest feature stories, such as how a co-op board avoided a financial collapse, and how a motivated board put through an environmentally friendly initiative; service articles, such as those detailing guidelines for hiring a property management firm, illuminating group decision-making dynamics, studying implementation of solar or geothermal power, and reviewing methods of increasing building revenue; and advocacy journalism, such as stories about shoddy new construction and poor enforcement of building codes. Shorter pieces provide updates on co-op/condo legislation, judicial decisions, and policy trends.

Positive pressure enclosure

A positive pressure enclosure, also known as an isolation chamber, is a chamber used to provide a safe work environment for performing hot work in the presence of explosive gases or vapours. They are used most often in conjunction with the need for welding, and are often associated with the offshore oil industry.

A positive pressure enclosure works by providing a constant inflow of breathable atmosphere, which in turn causes gas to continuously leak out of the chamber. This outflow of gases prevents the ingress of explosive gases or vapours which are often present in such work locations. This constant outflow of gases from the chamber also serves to cleanse the air within of the undesirable gaseous by-products of the welding process. Most commercial versions of positive pressure enclosures are referred to by their manufacturers as habitats.

Operating principles

Flammability limits

Flammable gases are not generally explosive under all conditions, and indeed, must be present within specific ranges in order to be explosive, or flammable. Additionally, oxygen must be present. The flammability limits of gases are expressed in proportions to the other gases present. For example, for methane, the lower explosive limit (LEL) is 4.4% and the upper explosive limit (UEL) is 17%. A positive pressure enclosure works by making sure that the methane present in the work area never approaches the 4.4% LEL.

Habitat (horse)

Habitat (1966–1987) was an American-bred British-trained Thoroughbred racehorse and sire. In a racing career which lasted from April until October 1969, the colt ran eight times and won five races. Unraced as a two-year-old, he proved to be the best European miler of 1969, winning the Lockinge Stakes and the Wills Mile in England and travelling to France to win the Prix Quincey and the Prix du Moulin. He was then retired to stud where he became an outstandingly successful sire of racehorses and broodmares.

Background

Habitat was a bay horse standing 16.1 hands high bred in Kentucky by Nuckols Bros. He was sired by Sir Gaylord, a half brother to Secretariat and a successful racehorse and sire in his own right: at the time of Habitat's racing career he was at the height of his reputation as a breeding stallion, having sired the 1968 Epsom Derby winner Sir Ivor. Habitat's dam. Little Hut, won five races and produced several other winners including Northfields (by Northern Dancer) who won the Louisiana Derby and became a successful sire in Europe and South Africa.