A general merchant store is a rural or small town store that carries a general line of merchandise. It carries a broad selection of merchandise, sometimes in a small space, where people from the town and surrounding rural areas come to purchase all their general goods; the store obtains special orders from warehouses. It differs from a convenience store or corner shop in that it will be the main shop for the community rather than a convenient supplement. General stores sell staple food items such as milk and bread, various household goods such as hardware and electrical supplies; the concept of the general store is old, although some still exist, there are far fewer than there once were, due to urbanization, urban sprawl, the recent phenomenon of big-box stores. The term "general merchandise store" is used to describe a hybrid of a department store, with a wide selection of goods, a discount store, with low prices. Examples include Sears. General dealers were established in the 18th and 19th century in many remote populated places where mobility was limited and a single shop was sufficient to service the entire community.
Due to its close connection and confinement to its customers, general dealers adjusted their sales offerings to the specific preferences of their community. General dealers existed, apart from mainland England and North America, in all colonies and in areas where settlers encroached communities that did not trade with money. In the colonies trade in local produce had existed; the growing need for imported goods, both from European settlers and the indigenous population, led to the establishment of a network of merchants, subsequently to the creation of a money economy. While a large number of general stores still exist in Australia, as in other parts of the world their numbers were reduced by the advent of supermarkets; the oldest continually run general store in Canada is Trousdale's, located in Sydenham, operated by the Trousdale family since 1836. Socialbility has always been a feature. Gray Creek Store in Gray Creek, Kootenay Bay, Canada is the largest and oldest general dealer in the Kootenay Lake region Enniskillen General Store in Clarington, Ontario has been in operation since 1840 and still continues today.
Robinson's General Store in Dorset, voted "Canada's Best Country Store", has been owned and operated by the same family since 1921. In the Dominican Republic, a colmado is the country's equivalent to a general store. Colmado literal translation is'full to the brim' implying its great density of goods in a small space; the colmado is much more than just a general store, for it offers a social gathering point for the residents of the town or neighborhood. The colmado is an important institution in the Dominican Republic serving as an economic and political center for every small community, it is common for colmados to have loud Dominican music such as bachata, or salsa playing. A common pastime for Dominican men is to play dominoes and drink a beer at their local colmado on Sundays. Another particularity of the colmado is that they provide delivery services of their products straight to your house door. Products go from beers, toilet paper to a flash light or canned food; the Greek merchants in Egypt were called bakal.
In India, a tapri is a regional version of a general store. It stores all home, personal and hygienic daily used products. Many Kirana shops sell products other from food, such as clothing or household items, toys and medicines. Small Kirna stores, which are located on the corner of streets and known as katta or tapri, sell cigarettes and tea. Due to its sparse population there are still a number of general dealers in Namibia, for instance the Solitaire General Dealer in Solitaire, an important stopover for tourists through Namibia's Namib-Naukluft Park. In Puerto Rico, a U. S. territory, several general stores have proliferated since the 1970s. Supermercados Selectos Supermercados Econo There are still many general dealers in South Africa. Oepverkoop is the oldest general dealer in Western Cape. Goodwood Museum in Cape Town displays the operation of a general dealer shop. Bodeguita comes from the Spanish language as a diminutive of bodega which means "small store" or "small warehouse". Traditionally, Bodeguita existed selling general merchandise they were replaced by the chain store, the same way large US chains have eliminated the "mom and pop" store.
Village shops are becoming less common in the densely populated parts of the country, although they remain common in remote rural areas. Their rarity in England is due to several factors, such as the rise in car ownership, competition from large chain supermarkets, the rising cost of village properties, the increasing trend of the wealthy to own holiday homes in picturesque villages these houses which used to be occupied full-time by potential customers are vacant for long periods. Of those villages in England who still have shops, these days they are a combination of services under one roof to increase the likelihood of profit and survival. Extra services may include a post office, private business services such as tearooms and bed and breakfast accommodation.
The domestic pig called swine, hog, or pig when there is no need to distinguish it from other pigs, is a domesticated large, even-toed ungulate. It is variously considered a subspecies of a distinct species; the domestic pig's head-plus-body-length ranges from 0.9 to 1.8 m, adult pigs weigh between 50 and 350 kg, with well-fed individuals exceeding this weight range. The size and weight of a hog depends on its breed. Compared to other artiodactyls, its head is long and free of warts. Even-toed ungulates are herbivorous, but the domestic pig is an omnivore, like its wild relative; when used as livestock, domestic pigs are farmed for the consumption of their flesh, called pork. The animal's bones and bristles are used in commercial products. Domestic pigs miniature breeds, are kept as pets; the domestic pig has a large head, with a long snout, strengthened by a special prenasal bone and a disk of cartilage at the tip. The snout is used to dig into the soil to find food, is a acute sense organ; the dental formula of adult pigs is 184.108.40.206.1.4.3.
The rear teeth are adapted for crushing. In the male the canine teeth can form tusks, which grow continuously and are sharpened by being ground against each other. Four hoofed toes are on each foot, with the two larger central toes bearing most of the weight, but the outer two being used in soft ground. Most domestic pigs have rather a bristled sparse hair covering on their skin, although woolly-coated breeds such as the Mangalitsa exist. Pigs possess both apocrine and eccrine sweat glands, although the latter appear limited to the snout and dorsonasal areas. Pigs, like other "hairless" mammals, do not use thermal sweat glands in cooling. Pigs are less able than many other mammals to dissipate heat from wet mucous membranes in the mouth through panting, their thermoneutral zone is 16 to 22 °C. At higher temperatures, pigs lose heat by wallowing in water via evaporative cooling. Pigs are one of four known mammalian species which possess mutations in the nicotinic acetylcholine receptor that protect against snake venom.
Mongooses, honey badgers and pigs all have modifications to the receptor pocket which prevents the snake venom α-neurotoxin from binding. These represent four independent mutations. Domestic pigs have small lungs in relation to their body size, are thus more susceptible than other domesticated animals to fatal bronchitis and pneumonia; the domestic pig is most considered to be a subspecies of the wild boar, given the name Sus scrofa by Carl Linnaeus in 1758. However, in 1777, Johann Christian Polycarp Erxleben classified the domestic pig as a separate species from the wild boar, he gave it the name Sus domesticus, still used by some taxonomists. Archaeological evidence suggests that pigs were domesticated from wild boar as early as 13,000–12,700 BC in the Near East in the Tigris Basin, Çayönü, Cafer Höyük, Nevalı Çori being managed in the wild in a way similar to the way they are managed by some modern New Guineans. Remains of pigs have been dated to earlier than 11,400 BC in Cyprus; those animals must have been introduced from the mainland, which suggests domestication in the adjacent mainland by then.
There was a separate domestication in China which took place about 8000 years ago. DNA evidence from subfossil remains of teeth and jawbones of Neolithic pigs shows that the first domestic pigs in Europe had been brought from the Near East; this stimulated the domestication of local European wild boar, resulting in a third domestication event with the Near Eastern genes dying out in European pig stock. Modern domesticated pigs have involved complex exchanges, with European domesticated lines being exported, in turn, to the ancient Near East. Historical records indicate that Asian pigs were introduced into Europe during the 18th and early 19th centuries. In August 2015, a study looked at over 100 pig genome sequences to ascertain their process of domestication, assumed to have been initiated by humans, involved few individuals, relied on reproductive isolation between wild and domestic forms; the study found that the assumption of reproductive isolation with population bottlenecks was not supported.
The study indicated that pigs were domesticated separately in Western Asia and China, with Western Asian pigs introduced into Europe, where they crossed with wild boar. A model that fitted the data included a mixture with a now extinct ghost population of wild pigs during the Pleistocene; the study found that despite back-crossing with wild pigs, the genomes of domestic pigs have strong signatures of selection at DNA loci that affect behavior and morphology. The study concluded that human selection for domestic traits counteracted the homogenizing effect of gene flow from wild boars and created domestication islands in the genome; the same process may apply to other domesticated animals. The adaptable nature and omnivorous diet of the wild boar allowed early humans to domesticate it readily. Pigs were used for food, but early civilizations used the pigs' hides for shields, bones for tools and weapons, bristles for brushes. In India, pigs have been domesticated for a long time in Goa and some rural areas, for pig toilets.
Though ecologically logical as well as economical
The United States of America known as the United States or America, is a country composed of 50 states, a federal district, five major self-governing territories, various possessions. At 3.8 million square miles, the United States is the world's third or fourth largest country by total area and is smaller than the entire continent of Europe's 3.9 million square miles. With a population of over 327 million people, the U. S. is the third most populous country. The capital is Washington, D. C. and the largest city by population is New York City. Forty-eight states and the capital's federal district are contiguous in North America between Canada and Mexico; the State of Alaska is in the northwest corner of North America, bordered by Canada to the east and across the Bering Strait from Russia to the west. The State of Hawaii is an archipelago in the mid-Pacific Ocean; the U. S. territories are scattered about the Pacific Ocean and the Caribbean Sea, stretching across nine official time zones. The diverse geography and wildlife of the United States make it one of the world's 17 megadiverse countries.
Paleo-Indians migrated from Siberia to the North American mainland at least 12,000 years ago. European colonization began in the 16th century; the United States emerged from the thirteen British colonies established along the East Coast. Numerous disputes between Great Britain and the colonies following the French and Indian War led to the American Revolution, which began in 1775, the subsequent Declaration of Independence in 1776; the war ended in 1783 with the United States becoming the first country to gain independence from a European power. The current constitution was adopted in 1788, with the first ten amendments, collectively named the Bill of Rights, being ratified in 1791 to guarantee many fundamental civil liberties; the United States embarked on a vigorous expansion across North America throughout the 19th century, acquiring new territories, displacing Native American tribes, admitting new states until it spanned the continent by 1848. During the second half of the 19th century, the Civil War led to the abolition of slavery.
By the end of the century, the United States had extended into the Pacific Ocean, its economy, driven in large part by the Industrial Revolution, began to soar. The Spanish–American War and World War I confirmed the country's status as a global military power; the United States emerged from World War II as a global superpower, the first country to develop nuclear weapons, the only country to use them in warfare, a permanent member of the United Nations Security Council. Sweeping civil rights legislation, notably the Civil Rights Act of 1964, the Voting Rights Act of 1965 and the Fair Housing Act of 1968, outlawed discrimination based on race or color. During the Cold War, the United States and the Soviet Union competed in the Space Race, culminating with the 1969 U. S. Moon landing; the end of the Cold War and the collapse of the Soviet Union in 1991 left the United States as the world's sole superpower. The United States is the world's oldest surviving federation, it is a representative democracy.
The United States is a founding member of the United Nations, World Bank, International Monetary Fund, Organization of American States, other international organizations. The United States is a developed country, with the world's largest economy by nominal GDP and second-largest economy by PPP, accounting for a quarter of global GDP; the U. S. economy is post-industrial, characterized by the dominance of services and knowledge-based activities, although the manufacturing sector remains the second-largest in the world. The United States is the world's largest importer and the second largest exporter of goods, by value. Although its population is only 4.3% of the world total, the U. S. holds 31% of the total wealth in the world, the largest share of global wealth concentrated in a single country. Despite wide income and wealth disparities, the United States continues to rank high in measures of socioeconomic performance, including average wage, human development, per capita GDP, worker productivity.
The United States is the foremost military power in the world, making up a third of global military spending, is a leading political and scientific force internationally. In 1507, the German cartographer Martin Waldseemüller produced a world map on which he named the lands of the Western Hemisphere America in honor of the Italian explorer and cartographer Amerigo Vespucci; the first documentary evidence of the phrase "United States of America" is from a letter dated January 2, 1776, written by Stephen Moylan, Esq. to George Washington's aide-de-camp and Muster-Master General of the Continental Army, Lt. Col. Joseph Reed. Moylan expressed his wish to go "with full and ample powers from the United States of America to Spain" to seek assistance in the revolutionary war effort; the first known publication of the phrase "United States of America" was in an anonymous essay in The Virginia Gazette newspaper in Williamsburg, Virginia, on April 6, 1776. The second draft of the Articles of Confederation, prepared by John Dickinson and completed by June 17, 1776, at the latest, declared "The name of this Confederation shall be the'United States of America'".
The final version of the Articles sent to the states for ratification in late 1777 contains the sentence "The Stile of this Confederacy shall be'The United States of America'". In June 1776, Thomas Jefferson wrote the phrase "UNITED STATES OF AMERICA" in all capitalized letters in the headline of his "original Rough draught" of the Declaration of Independence; this draft of the document did not surface unti
Arkansas County, Arkansas
Arkansas County is a county located in the U. S. state of Arkansas. As of the 2010 census, the population was 19,019. Located in the Arkansas Delta, the county has De Witt and Stuttgart; the first of the state's 75 present-day counties to be created, Arkansas County was formed on December 13, 1813, when this area was part of the Missouri Territory. The county was named after the Arkansas River; this was split off from Missouri Territory and admitted to the union as a state. The riverfront areas in the Arkansas Delta were developed for cotton plantations, based on the use of enslaved African Americans. Cotton was the major commodity crop after the Civil War. Other crops such as soybeans are cultivated now, in industrial-scale production. Arkansas County is one of seven present-day counties in the United States that have the same name as the state in which they are located; the county was created by the Missouri Territorial Legislature on December 31, 1813. It was called Arkansas after the Arkansas River, the Arkansas tribe of Native Americans.
It is one of seven current counties. Its original boundaries were New Madrid County to the north, Louisiana to the south, the Mississippi River to the east, the Indian Boundary Line south of Fort Clark to the west; the county seat was moved from Arkansas Post to DeWitt, a newly established town created at the request of the Arkansas County Quorum Court on February 19, 1853. County government held court for the first time in DeWitt in October 1855; this area was developed for cotton plantations through the antebellum period, based on the labor of enslaved African-American workers. Major planters earned considerable wealth with the commodity crop. Citizens of the county supported the Secession Convention to discuss secession from the Union in 1861 by an 80% to 20% margin; the anti-immediate secession delegates negotiated a compromise to put the question on the statewide ballot in August, but to remain in the Union. Following President Abraham Lincoln's request for troops following the Battle of Fort Sumter, citizens of several counties, including Arkansas County, formed a militia and stormed Little Rock to serve the Confederate government.
Arkansas County sent two companies of militia to Little Rock to serve in what would become the 1st Arkansas Infantry Regiment: Company H, known as "The Crockett Rifles", Company K, known as "The DeWitt Guards". A third company would join the 6th Arkansas Infantry Regiment as the "Dixie Grays". There were tensions in the aftermath of the Civil War, as whites and freedmen struggled to negotiate working within a free labor system. In the post-Reconstruction era, whites directed considerable violence against African Americans, in an effort to restore and maintain white supremacy after Democrats regained power. At the turn of the century, the state legislature passed measures that disenfranchised most blacks for decades; the Equal Justice Initiative reported in 2015 that the county had 18 lynchings of African Americans from 1877-1950, most in the decades near the turn of the 20th century. This was the highest of any county other than Phillips, where the Elaine Race Riot is believed to have resulted in more than 200 deaths of African Americans.
To escape the violence and social oppression, thousands of African Americans left the state in the Great Migration to northern industrial cities. They migrated beginning around World War I, increasing the number leaving during and after World War II, when rural jobs had been reduced. Arkansas County is located in the Arkansas Delta a subregion of the Mississippi Alluvial Plain, a flat area consisting of rich, fertile sediment deposits from the Mississippi River between Louisiana and Illinois. Within the Delta, Arkansas County is entirely within the Grand Prairie subregion a flat grassland plain underlain by an impermeable clay layer. Prior to the 19th century, flatter areas with to slowly permeable soils supported Arkansas's largest prairie, covered in prairie grasses and forbs, with oaks covering the low hills and ridges, pockets of floodplains with bottomland hardwood forests; this region was a sharp contrast to the bottomland forests that once dominated other parts of the Mississippi Alluvial Plain.
Cropland has now replaced the native vegetation. Distinctively, rice is the main crop; the rice fields provide many species of waterfowl. Two different eco-regions border the Grand Prairie along the major rivers forming the county's east and southern boundaries: the Arkansas River Holocene Meander Belt and the Western Lowlands Holocene Meanders; these areas of flat floodplain contain the meander belts of the present and past watercourses, point bars, natural levees and abandoned river channels. Some of the most extensive remaining tracts of native bottomland hardwood forest in the Mississippi Alluvial Plain remain along these rivers. Along the banks of the White River in Arkansas County, these forests are preserved in the White River National Wildlife Refuge. According to the U. S. Census Bureau, the county has a total area of 1,033.79 square miles, of which 988.49 square miles is land and 45.30 square miles is water. The county is located 55 miles east of Little Rock, 112 miles southwest of Memphis, and
Poultry are domesticated birds kept by humans for their eggs, their meat or their feathers. These birds are most members of the superorder Galloanserae the order Galliformes. Poultry includes other birds that are killed for their meat, such as the young of pigeons but does not include similar wild birds hunted for sport or food and known as game; the word "poultry" comes from the French/Norman word poule, itself derived from the Latin word pullus, which means small animal. The domestication of poultry took place several thousand years ago; this may have been as a result of people hatching and rearing young birds from eggs collected from the wild, but involved keeping the birds permanently in captivity. Domesticated chickens may have been used for cockfighting at first and quail kept for their songs, but soon it was realised how useful it was having a captive-bred source of food. Selective breeding for fast growth, egg-laying ability, conformation and docility took place over the centuries, modern breeds look different from their wild ancestors.
Although some birds are still kept in small flocks in extensive systems, most birds available in the market today are reared in intensive commercial enterprises. Together with pig meat, poultry is one of the two most eaten types of meat globally, with over 70% of the meat supply in 2012 between them. All poultry meat should be properly handled and sufficiently cooked in order to reduce the risk of food poisoning; the word "poultry" comes from the West & English "pultrie", from Old French pouletrie, from pouletier, poultry dealer, from poulet, pullet. The word "pullet" itself comes from Middle English pulet, from Old French polet, both from Latin pullus, a young fowl, young animal or chicken; the word "fowl" is of Germanic origin. "Poultry" is a term used for any kind of domesticated bird, captive-raised for its utility, traditionally the word has been used to refer to wildfowl and waterfowl but not to cagebirds such as songbirds and parrots. "Poultry" can be defined as domestic fowls, including chickens, turkeys and ducks, raised for the production of meat or eggs and the word is used for the flesh of these birds used as food.
The Encyclopædia Britannica lists the same bird groups but includes guinea fowl and squabs. In R. D. Crawford's Poultry breeding and genetics, squabs are omitted but Japanese quail and common pheasant are added to the list, the latter being bred in captivity and released into the wild. In his 1848 classic book on poultry and Domestic Poultry: Their History, Management, Edmund Dixon included chapters on the peafowl, guinea fowl, mute swan, various types of geese, the muscovy duck, other ducks and all types of chickens including bantams. In colloquial speech, the term "fowl" is used near-synonymously with "domesticated chicken", or with "poultry" or just "bird", many languages do not distinguish between "poultry" and "fowl". Both words are used for the flesh of these birds. Poultry can be distinguished from "game", defined as wild birds or mammals hunted for food or sport, a word used to describe the flesh of these when eaten. Chickens are medium-sized, chunky birds with an upright stance and characterised by fleshy red combs and wattles on their heads.
Males, known as cocks, are larger, more boldly coloured, have more exaggerated plumage than females. Chickens are gregarious, ground-dwelling birds that in their natural surroundings search among the leaf litter for seeds and other small animals, they fly except as a result of perceived danger, preferring to run into the undergrowth if approached. Today's domestic chicken is descended from the wild red junglefowl of Asia, with some additional input from grey junglefowl. Domestication is believed to have taken place between 7,000 and 10,000 years ago, what are thought to be fossilized chicken bones have been found in northeastern China dated to around 5,400 BC. Archaeologists believe domestication was for the purpose of cockfighting, the male bird being a doughty fighter. By 4,000 years ago, chickens seem to have reached the Indus Valley and 250 years they arrived in Egypt, they were regarded as symbols of fertility. The Romans used them in divination, the Egyptians made a breakthrough when they learned the difficult technique of artificial incubation.
Since the keeping of chickens has spread around the world for the production of food with the domestic fowl being a valuable source of both eggs and meat. Since their domestication, a large number of breeds of chickens have been established, but with the exception of the white Leghorn, most commercial birds are of hybrid origin. In about 1800, chickens began to be kept on a larger scale, modern high-output poultry farms were present in the United Kingdom from around 1920 and became established in the United States soon after the Second World War. By the mid-20th century, the poultry meat-producing industry was of greater importance than the egg-laying industry. Poultry breeding has produced strains to fulfil different needs. Male birds are unwanted in the egg-laying industry and can b
During the American Civil War, the Union Army referred to the United States Army, the land force that fought to preserve the Union of the collective states. Known as the Federal Army, it proved essential to the preservation of the United States of America as a working, viable republic; the Union Army was made up of the permanent regular army of the United States, but further fortified and strengthened by the many temporary units of dedicated volunteers as well as including those who were drafted in to service as conscripts. To this end, the Union Army fought and triumphed over the efforts of the Confederate States Army in the American Civil War. Over the course of the war, 2,128,948 men enlisted in the Union Army, including 178,895 colored troops. Of these soldiers, 596,670 were wounded or went missing; the initial call-up was for just three months, after which many of these men chose to reenlist for an additional three years. When the American Civil War began in April 1861, there were only 16,367 men in the U.
S. Army, including 1,108 commissioned officers. 20% of these officers, most of them Southerners, choosing to tie their lives and fortunes to the Army of the Confederacy. In addition 200 West Point graduates who had left the Army, including Ulysses S. Grant, William Tecumseh Sherman, Braxton Bragg, would return to service at the outbreak of the war; this group's loyalties were far more divided, with 92 donning Confederate gray and 102 putting on the blue of the Union Army. The U. S. Army consisted of ten regiments of infantry, four of artillery, two of cavalry, two of dragoons, three of mounted infantry; the regiments were scattered widely. Of the 197 companies in the army, 179 occupied 79 isolated posts in the West, the remaining 18 manned garrisons east of the Mississippi River along the Canada–United States border and on the Atlantic coast. With the Southern slave states declaring secession from the Union, with this drastic shortage of men in the army, President Abraham Lincoln called on the states to raise a force of 75,000 men for three months to put down this subversive insurrection.
Lincoln's call forced the border states to choose sides, four seceded, making the Confederacy eleven states strong. It turned out that the war itself proved to be much longer and far more extensive in scope and scale than anyone on either side, Union North or Confederate South, expected or imagined at the outset on the date of July 22, 1861; that was the day that Congress approved and authorized subsidy to allow and support a volunteer army of up to 500,000 men to the cause. The call for volunteers was met by patriotic Northerners and immigrants who enlisted for a steady income and meals. Over 10,000 Germans in New York and Pennsylvania responded to Lincoln's call, the French were quick to volunteer; as more men were needed, the number of volunteers fell and both money bounties and forced conscription had to be turned to. Between April 1861 and April 1865, at least 2,128,948 men served in the Union Army, of whom the majority were volunteers, it is a misconception that the South held an advantage because of the large percentage of professional officers who resigned to join the Confederate army.
At the start of the war, there were 824 graduates of the U. S. Military Academy on the active list. Of the 900 West Point graduates who were civilians, 400 returned to the Union Army and 99 to the Confederate. Therefore, the ratio of Union to Confederate professional officers was 642 to 283; the South did have the advantage of other military colleges, such as The Citadel and Virginia Military Institute, but they produced fewer officers. Though officers were able to resign, enlisted soldiers did not have this right. While the total number of those is unknown, only 26 enlisted men and non-commissioned officers of the regular army are known to have left the army to join the Confederate army when the war began; the Union Army was composed of numerous organizations, which were organized geographically. Military division A collection of Departments reporting to one commander. Military Divisions were similar to the more modern term Theater. Department An organization that covered a defined region, including responsibilities for the Federal installations therein and for the field armies within their borders.
Those named for states referred to Southern states, occupied. It was more common to name departments for regions. District A subdivision of a Department
An old-growth forest — termed primary forest or late seral forest — is a forest that has attained great age without significant disturbance and thereby exhibits unique ecological features and might be classified as a climax community. Old-growth features include diverse tree-related structures that provide diverse wildlife habitat that increases the biodiversity of the forested ecosystem; the concept of diverse tree structure includes multi-layered canopies and canopy gaps varying tree heights and diameters, diverse tree species and classes and sizes of woody debris. Old-growth forests are valuable for economic reasons and for the ecosystem services they provide; this can be a point of contention when some in the logging industry may desire to cut down the forests to obtain valuable timber, while environmentalists seek to preserve the forests for benefits such as maintenance of biodiversity, water regulation, nutrient cycling. Old-growth forests tend to have large trees and standing dead trees, multilayered canopies with gaps that result from the deaths of individual trees, coarse woody debris on the forest floor.
Forest regenerated after a severe disturbance, such as wildfire, insect infestation, or harvesting, is called second-growth or'regeneration' until enough time passes for the effects of the disturbance to be no longer evident. Depending on the forest, this may take from a century to several millennia. Hardwood forests of the eastern United States can develop old-growth characteristics in 150–500 years. In British Columbia, old growth is defined as 120 to 140 years of age in the interior of the province where fire is a frequent and natural occurrence. In British Columbia’s coastal rainforests, old growth is defined as trees more than 250 years, with some trees reaching more than 1,000 years of age. In Australia, eucalypt trees exceed 350 years of age due to frequent fire disturbance. Forest types have different development patterns, natural disturbances and appearances. A Douglas-fir stand may grow for centuries without disturbance while an old-growth ponderosa pine forest requires frequent surface fires to reduce the shade-tolerant species and regenerate the canopy species.
In the Boreal-West Forest Region, catastrophic disturbances like wildfires minimize opportunities for major accumulations of dead and downed woody material and other structural legacies associated with old growth conditions. Typical characteristics of old-growth forest include presence of older trees, minimal signs of human disturbance, mixed-age stands, presence of canopy openings due to tree falls, pit-and-mound topography, down wood in various stages of decay, standing snags, multilayered canopies, intact soils, a healthy fungal ecosystem, presence of indicator species. Old-growth forests are biologically diverse, home to many rare species, threatened species, endangered species of plants and animals, such as the northern spotted owl, marbled murrelet and fisher, making them ecologically significant. Levels of biodiversity may be higher or lower in old-growth forests compared to that in second-growth forests, depending on specific circumstances, environmental variables, geographic variables.
Logging in old-growth forests is a contentious issue in many parts of the world. Excessive logging reduces biodiversity, affecting not only the old-growth forest itself, but indigenous species that rely upon old-growth forest habitat. A forest in old-growth stage has a mix of tree ages, due to a distinct regeneration pattern for this stage. New trees regenerate at different times from each other, because each one of them has different spatial location relative to the main canopy, hence each one receives a different amount of light; the mixed age of the forest is an important criterion in ensuring that the forest is a stable ecosystem in the long term. A climax stand, uniformly aged becomes senescent and degrades within a short time to result in a new cycle of forest succession. Thus, uniformly aged stands are less stable ecosystems. Forest canopy gaps are essential in maintaining mixed-age stands; some herbaceous plants only become established in canopy openings, but persist beneath an understory.
Openings are a result of tree death due to small impact disturbances such as wind, low-intensity fires, tree diseases. Old-growth forests are unique having multiple horizontal layers of vegetation representing a variety of tree species, age classes, sizes, as well as "pit and mound" soil shape with well-established fungal nets; because old-growth forest is structurally diverse, it provides higher-diversity habitat than forests in other stages. Thus, sometimes higher biological diversity can be sustained in old-growth forest, or at least a biodiversity, different from other forest stages; the characteristic topography of much old-growth forest consists of mounds. Mounds are caused by decaying fallen trees, pits by the roots pulled out of the ground when trees fall due to natural causes, including being pushed over by animals. Pits expose humus-poor, mineral-rich soil and collect moisture and fallen leaves, forming a thick organic layer, able to nurture certain types of organisms. Mounds provide a place free of leaf inundation and saturation, where other types of organisms thrive.
Standing snags provide food sources and habitat for many types of organisms. In particular, many species of dead-wood predators such as woodpeckers must have standing snags available for feeding. In North America, the spotted owl is well known for needing standing snags for nesting habitat. Fallen timber, or coarse woody debris, contributes carbon-rich organic matter directly to the soil, providing a substrate for mosses and seedlings, cr