Contents 1 Definition 2 Etymology 3 Evolution 4 Ecology 4.1 Components 4.2 Layers 4.3 Types 4.3.1 Temperate needleleaf 4.3.2 Temperate broadleaf and mixed 4.3.3 Tropical moist 4.3.4 Tropical dry 4.3.5 Sparse trees and parkland 4.3.6 Forest plantations 5 Societal significance 5.1 Canada 5.2 Latvia 5.3 United States 6 Land area 7 See also 8 References 9 External links

Definition Forest in the Scottish Highlands Although forest is a term of common parlance, there is no universally recognised precise definition, with more than 800 definitions of forest used around the world.[4] Although a forest is usually defined by the presence of trees, under many definitions an area completely lacking trees may still be considered a forest if it grew trees in the past, will grow trees in the future,[9] or was legally designated as a forest regardless of vegetation type.[10][11] There are three broad categories of forest definitions in use: administrative, land use, and land cover.[10] Administrative definitions are based primarily upon the legal designations of land, and commonly bear little relationship to the vegetation growing on the land: land that is legally designated as a forest is defined as a forest even if no trees are growing on it.[10] Land use definitions are based upon the primary purpose that the land serves. For example, a forest may be defined as any land that is used primarily for production of timber. Under such a land use definition, cleared roads or infrastructure within an area used for forestry, or areas within the region that have been cleared by harvesting, disease or fire are still considered forests even if they contain no trees. Land cover definitions define forests based upon the type and density of vegetation growing on the land. Such definitions typically define a forest as an area growing trees above some threshold. These thresholds are typically the number of trees per area (density), the area of ground under the tree canopy (canopy cover) or the section of land that is occupied by the cross-section of tree trunks (basal area).[10] Under such land cover definitions, and area of land only be defined as forest if it is growing trees. Areas that fail to meet the land cover definition may be still included under while immature trees are establishing if they are expected to meet the definition at maturity.[10] Under land use definitions, there is considerable variation on where the cutoff points are between a forest, woodland, and savanna. Under some definitions, forests require very high levels of tree canopy cover, from 60% to 100%,[12] excluding savannas and woodlands in which trees have a lower canopy cover. Other definitions consider savannas to be a type of forest, and include all areas with tree canopies over 10%.[9] Some areas covered in trees are legally defined as agricultural areas, e.g. Norway spruce plantations in Austrian forest law when the trees are being grown as Christmas trees and below a certain height.

Etymology Since the 13th century, the Niepołomice Forest in Poland has had special use and protection. In this view from space, different coloration can indicate different functions.[13] The word forest comes from Middle English, from Old French forest (also forès) "forest, vast expanse covered by trees"; first introduced in English as the word for wild land set aside for hunting[14] without the necessity in definition for the existence of trees.[15] Possibly a borrowing (probably via Frankish or Old High German) of the Medieval Latin word foresta "open wood", foresta was first used by Carolingian scribes in the Capitularies of Charlemagne to refer specifically to the king's royal hunting grounds. The term was not endemic to Romance languages (e.g. native words for "forest" in the Romance languages evolved out of the Latin word silva "forest, wood" (English sylvan); cf. Italian, Spanish, Portuguese selva; Romanian silvă; Old French selve); and cognates in Romance languages, such as Italian foresta, Spanish and Portuguese floresta, etc. are all ultimately borrowings of the French word. A forest near Vinitsa, Republic of Macedonia The exact origin of Medieval Latin foresta is obscure. Some authorities claim the word derives from the Late Latin phrase forestam silvam, meaning "the outer wood"; others claim the term is a latinisation of the Frankish word *forhist "forest, wooded country", assimilated to forestam silvam (a common practice among Frankish scribes). Frankish *forhist is attested by Old High German forst "forest", Middle Low German vorst "forest", Old English fyrhþ "forest, woodland, game preserve, hunting ground" (English frith), and Old Norse fýri "coniferous forest", all of which derive from Proto-Germanic *furhísa-, *furhíþija- "a fir-wood, coniferous forest", from Proto-Indo-European *perkwu- "a coniferous or mountain forest, wooded height". Uses of the word "forest" in English to denote any uninhabited area of non-enclosure are now considered archaic.[16] The word was introduced by the Norman rulers of England as a legal term (appearing in Latin texts like the Magna Carta) denoting an uncultivated area legally set aside for hunting by feudal nobility (see Royal Forest).[16][17] Tywi Forest, Wales These hunting forests were not necessarily wooded much, if at all. However, as hunting forests did often include considerable areas of woodland, the word "forest" eventually came to mean wooded land more generally.[citation needed] By the start of the 14th century, the word appeared in English texts, indicating all three senses: the most common one, the legal term and the archaic usage.[16] Other terms used to mean "an area with a high density of trees" are wood, woodland, wold, weald, holt, frith and firth. Unlike forest, these are all derived from Old English and were not borrowed from another language. Some classifications now reserve the term woodland for an area with more open space between trees and distinguish among woodlands, open forests, and closed forests based on crown cover.[18]

Evolution The first known forests on Earth arose in the Late Devonian (approximately 380 million years ago), with the evolution of Archaeopteris.[19] Archaeopteris was a plant that was both tree-like and fern-like, growing to 10 metres (33 ft) in height. Archaeopteris quickly spread throughout the world, from the equator to subpolar latitudes.[19] Archaeopteris formed the first forest by being the first known species to cast shade due to its fronds and forming soil from its roots. Archaeopteris was deciduous, dropping its fronds onto the forest floor. The shade, soil, and forest duff from the dropped fronds created the first forest.[19] The shed organic matter altered the freshwater environment, slowing it down and providing food. This promoted freshwater fish.[19]

Ecology Main article: Forest ecology Temperate rainforest in Tasmania's Hellyer Gorge Forests account for 75% of the gross primary productivity of the Earth's biosphere, and contain 80% of the Earth's plant biomass.[7] Forest ecosystems can be found in all regions capable of sustaining tree growth, at altitudes up to the tree line, except where natural fire frequency or other disturbance is too high, or where the environment has been altered by human activity. The latitudes 10° north and south of the equator are mostly covered in tropical rainforest, and the latitudes between 53°N and 67°N have boreal forest. As a general rule, forests dominated by angiosperms (broadleaf forests) are more species-rich than those dominated by gymnosperms (conifer, montane, or needleleaf forests), although exceptions exist. Forests sometimes contain many tree species within a small area (as in tropical rain and temperate deciduous forests), or relatively few species over large areas (e.g., taiga and arid montane coniferous forests). Forests are often home to many animal and plant species, and biomass per unit area is high compared to other vegetation communities. Much of this biomass occurs below ground in the root systems and as partially decomposed plant detritus. The woody component of a forest contains lignin, which is relatively slow to decompose compared with other organic materials such as cellulose or carbohydrate. Components Even, dense old-growth stand of beech trees (Fagus sylvatica) prepared to be regenerated by their saplings in the understory, in the Brussels part of the Sonian Forest. A forest consists of many components that can be broadly divided into two categories that are biotic (living) and abiotic (non-living) components. The living parts include trees, shrubs, vines, grasses and other herbaceous (non-woody) plants, mosses, algae, fungi, insects, mammals, birds, reptiles, amphibians, and microorganisms living on the plants and animals and in the soil. Layers Biogradska forest in Montenegro Spiny forest at Ifaty, Madagascar, featuring various Adansonia (baobab) species, Alluaudia procera (Madagascar ocotillo) and other vegetation A forest is made up of many layers. Starting from the ground level and moving up, the main layers of all forest types are the forest floor, the understory and the canopy. The emergent layer exists in tropical rainforests. Each layer has a different set of plants and animals depending upon the availability of sunlight, moisture and food. Forest floor contains decomposing leaves, animal droppings, and dead trees. Decay on the forest floor forms new soil and provides nutrients to the plants. The forest floor supports ferns, grasses, mushroom and tree seedlings. Understory is made up of bushes, shrubs, and young trees that are adapted to living in the shades of the canopy. Canopy is formed by the mass of intertwined branches, twigs and leaves of the mature trees. The crowns of the dominant trees receive most of the sunlight. This is the most productive part of the trees where maximum food is produced. The canopy forms a shady, protective "umbrella" over the rest of the forest. Emergent layer exists in the tropical rain forest and is composed of a few scattered trees that tower over the canopy.[20] Types A dry sclerophyll forest in Sydney, which is dominated by eucalyptus trees. Forests can be classified in different ways and to different degrees of specificity. One such way is in terms of the biome in which they exist, combined with leaf longevity of the dominant species (whether they are evergreen or deciduous). Another distinction is whether the forests are composed predominantly of broadleaf trees, coniferous (needle-leaved) trees, or mixed. Boreal forests occupy the subarctic zone and are generally evergreen and coniferous. Temperate zones support both broadleaf deciduous forests (e.g., temperate deciduous forest) and evergreen coniferous forests (e.g., temperate coniferous forests and temperate rainforests). Warm temperate zones support broadleaf evergreen forests, including laurel forests. Tropical and subtropical forests include tropical and subtropical moist forests, tropical and subtropical dry forests, and tropical and subtropical coniferous forests. Physiognomy classifies forests based on their overall physical structure or developmental stage (e.g. old growth vs. second growth). Forests can also be classified more specifically based on the climate and the dominant tree species present, resulting in numerous different forest types (e.g., Ponderosa pine/Douglas-fir forest). The number of trees in the world, according to a 2015 estimate, is 3 trillion, of which 1.4 trillion are in the tropics or sub-tropics, 0.6 trillion in the temperate zones, and 0.7 trillion in the coniferous boreal forests. The estimate is about eight times higher than previous estimates, and is based on tree densities measured on over 400,000 plots. It remains subject to a wide margin of error, not least because the samples are mainly from Europe and North America.[21] Forests can also be classified according to the amount of human alteration. Old-growth forest contains mainly natural patterns of biodiversity in established seral patterns, and they contain mainly species native to the region and habitat. In contrast, secondary forest is regrowing forest following timber harvest and may contain species originally from other regions or habitats.[22] Different global forest classification systems have been proposed, but none has gained universal acceptance.[23] UNEP-WCMC's forest category classification system is a simplification of other more complex systems (e.g. UNESCO's forest and woodland 'subformations'). This system divides the world's forests into 26 major types, which reflect climatic zones as well as the principal types of trees. These 26 major types can be reclassified into 6 broader categories: temperate needleleaf; temperate broadleaf and mixed; tropical moist; tropical dry; sparse trees and parkland; and forest plantations.[23] Each category is described as a separate section below. Temperate needleleaf Temperate needleleaf forests mostly occupy the higher latitude regions of the Northern Hemisphere, as well as high altitude zones and some warm temperate areas, especially on nutrient-poor or otherwise unfavourable soils. These forests are composed entirely, or nearly so, of coniferous species (Coniferophyta). In the Northern Hemisphere pines Pinus, spruces Picea, larches Larix, firs Abies, Douglas firs Pseudotsuga and hemlocks Tsuga, make up the canopy, but other taxa are also important. In the Southern Hemisphere, most coniferous trees (members of the Araucariaceae and Podocarpaceae) occur in mixtures with broadleaf species, and are classed as broadleaf and mixed forests.[23] Temperate broadleaf and mixed Broadleaf forest in Bhutan Temperate broadleaf and mixed forests include a substantial component of trees in the Anthophyta. They are generally characteristic of the warmer temperate latitudes, but extend to cool temperate ones, particularly in the southern hemisphere. They include such forest types as the mixed deciduous forests of the United States and their counterparts in China and Japan, the broadleaf evergreen rainforests of Japan, Chile and Tasmania, the sclerophyllous forests of Australia, central Chile, the Mediterranean and California, and the southern beech Nothofagus forests of Chile and New Zealand.[23] Tropical moist There are many different types of tropical moist forests, with lowland evergreen broad leaf tropical rainforests, for example várzea and igapó forests and the terra firma forests of the Amazon Basin; the peat swamp forests, dipterocarp forests of Southeast Asia; and the high forests of the Congo Basin. Seasonal tropical forests, perhaps the best description for the colloquial term "jungle", typically range from the rainforest zone 10 degrees north or south of the equator, to the Tropic of Cancer and Tropic of Capricorn. Forests located on mountains are also included in this category, divided largely into upper and lower montane formations on the basis of the variation of physiognomy corresponding to changes in altitude.[24] Tropical dry Tropical dry forests are characteristic of areas in the tropics affected by seasonal drought. The seasonality of rainfall is usually reflected in the deciduousness of the forest canopy, with most trees being leafless for several months of the year. However, under some conditions, e.g. less fertile soils or less predictable drought regimes, the proportion of evergreen species increases and the forests are characterised as "sclerophyllous". Thorn forest, a dense forest of low stature with a high frequency of thorny or spiny species, is found where drought is prolonged, and especially where grazing animals are plentiful. On very poor soils, and especially where fire or herbivory are recurrent phenomena, savannas develop.[23] Sparse trees and parkland Taiga forest near Saranpaul in the northeast Ural Mountains, Khanty–Mansia, Russia. Trees include Picea obovata (dominant on right bank), Larix sibirica, Pinus sibirica, and Betula pendula. Sparse trees and savanna are forests with lower canopy cover of trees. They occur principally in areas of transition from forested to non-forested landscapes. The two major zones in which these ecosystems occur are in the boreal region and in the seasonally dry tropics. At high latitudes, north of the main zone of boreal forest, growing conditions are not adequate to maintain a continuous closed forest cover, so tree cover is both sparse and discontinuous. This vegetation is variously called open taiga, open lichen woodland, and forest tundra. A savanna is a mixed woodland grassland ecosystem characterized by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to support an unbroken herbaceous layer consisting primarily of grasses. Savannas maintain an open canopy despite a high tree density.[23] Forest plantations Forest plantations are generally intended for the production of timber and pulpwood. Commonly mono-specific and/or composed of introduced tree species, these ecosystems are not generally important as habitat for native biodiversity. However, they can be managed in ways that enhance their biodiversity protection functions and they can provide ecosystem services such as maintaining nutrient capital, protecting watersheds and soil structure, and storing carbon.[22][23]

Societal significance Main articles: Forestry, Logging, and Deforestation Redwood tree in northern California redwood forest, where many redwood trees are managed for preservation and longevity, rather than being harvested for wood production Forests provide a diversity of ecosystem services including converting carbon dioxide into oxygen and biomass, acting as a carbon sink, aiding in regulating climate, purifying water, mitigating natural hazards such as floods, and serving as a genetic reserve. Forests also serve as a source of lumber and as recreational areas. Some researchers state that forests do not only provide benefits, but can in certain cases also incur costs to humans.[25][26] Forests may impose an economic burden,[27][28] diminish the enjoyment of natural areas,[29] reduce the food producing capacity of grazing land [30] and cultivated land,[31] reduce biodiversity [32][33] reduce available water for humans and wildlife,[34][35] harbour dangerous or destructive wildlife,[25][36] and act as reservoirs of human and livestock disease.[37][38] The management of forests is often referred to as forestry. Forest management has changed considerably over the last few centuries, with rapid changes from the 1980s onwards culminating in a practice now referred to as sustainable forest management. Forest ecologists concentrate on forest patterns and processes, usually with the aim of elucidating cause-and-effect relationships. Foresters who practice sustainable forest management focus on the integration of ecological, social, and economic values, often in consultation with local communities and other stakeholders. Priest River winding through Whitetail Butte with lots of forestry to the east—these lot patterns have existed since the mid-19th century. The white patches reflect areas with younger, smaller trees, where winter snow cover shows up brightly to the astronauts. Dark green-brown squares are parcels Humans have generally decreased the amount of forest worldwide. Anthropogenic factors that can affect forests include logging, urban sprawl, human-caused forest fires, acid rain, invasive species, and the slash and burn practices of swidden agriculture or shifting cultivation. The loss and re-growth of forest leads to a distinction between two broad types of forest, primary or old-growth forest and secondary forest. There are also many natural factors that can cause changes in forests over time including forest fires, insects, diseases, weather, competition between species, etc. In 1997, the World Resources Institute recorded that only 20% of the world's original forests remained in large intact tracts of undisturbed forest.[39] More than 75% of these intact forests lie in three countries—the boreal forests of Russia and Canada and the rainforest of Brazil. In 2010, the Food and Agriculture Organization of the United Nations[40] reported that world deforestation, mainly the conversion of tropical forests to agricultural land, had decreased over the past ten years but still continues at a high rate in many countries. Globally, around 13 million hectares of forests were converted to other uses or lost through natural causes each year between 2000 and 2010 as compared to around 16 million hectares per year during the 1990s. The study covered 233 countries and areas. Brazil and Indonesia, which had the highest loss of forests in the 1990s, have significantly reduced their deforestation rates. China instituted a ban on logging, beginning in 1998, due to the erosion and flooding that it caused.[41] In addition, ambitious tree planting programmes in countries such as China, India, the United States and Vietnam - combined with natural expansion of forests in some regions - have added more than seven million hectares of new forests annually. As a result, the net loss of forest area was reduced to 5.2 million hectares per year between 2000 and 2010, down from 8.3 million hectares annually in the 1990s. In 2015, a study for Nature Climate Change showed that the trend has recently been reversed, leading to an "overall gain" in global biomass and forests. This gain is due especially to reforestation in China and Russia.[42] However new forests are not completely equivalent to old growth forests in terms of species diversity, resilience and carbon capture. On September 7, 2015, the Food and Agriculture Organization of the United Nations released a new study stating that, over the last 25 years, the global deforestation rate has decreased by 50% due to improved management of forests and greater government protection.[43][44] Smaller areas of woodland in cities may be managed as urban forestry, sometimes within public parks. These are often created for human benefits; Attention Restoration Theory argues that spending time in nature reduces stress and improves health, while forest schools and kindergartens help young people to develop social as well as scientific skills in forests. These typically need to be close to where the children live, for practical logistics. Canada Garibaldi Provincial Park, British Columbia Canada has about 4,020,000 square kilometres (1,550,000 sq mi) of forest land. More than 90% of forest land is publicly owned and about 50% of the total forest area is allocated for harvesting. These allocated areas are managed using the principles of sustainable forest management, which includes extensive consultation with local stakeholders. About eight percent of Canada’s forest is legally protected from resource development.[45][46] Much more forest land—about 40 percent of the total forest land base—is subject to varying degrees of protection through processes such as integrated land use planning or defined management areas such as certified forests.[46] By December 2006, over 1,237,000 square kilometers of forest land in Canada (about half the global total) had been certified as being sustainably managed.[47] Clearcutting, first used in the latter half of the 20th century, is less expensive, but devastating to the environment, and companies are required by law to ensure that harvested areas are adequately regenerated. Most Canadian provinces have regulations limiting the size of clearcuts, although some older clearcuts can range upwards of 110 square kilometres (27,000 acres) in size which were cut over several years. Latvia Latvian Pine Forest in Ķegums Municipality Latvia has about 3,270,000 hectares (12,626 sq mi) of forest land which equates to 50.6% of Latvia's total area (24,938 sq mi). 1,510,000 hectares of forest land (46.3% of total forest land) is publicly owned and 1,750,000 hectares of forest land (53.7% of total forest land) is in private hands. Latvia's forests have been steadily increasing over the years which is in contrast to many other nations, mostly due to the forestation of land not used for agriculture. In 1935 there was only 1,757,000 hectares of forest, today this has increased by more than 150%. Birch is the most common tree at 28.2% followed by pine (26,9%), spruce (18.3%), grey alder (9.7%), aspen (8,0%), black alder (5.7%), oak/ash (1.2%) and finally hardwood making up the rest (2.0%).[48] [49] Gauja National Park, Latvia United States In the United States, most forests have historically been affected by humans to some degree, though in recent years improved forestry practices has helped regulate or moderate large scale or severe impacts. However, the United States Forest Service estimates a net loss of about 2 million hectares (4,942,000 acres) between 1997 and 2020; this estimate includes conversion of forest land to other uses, including urban and suburban development, as well as afforestation and natural reversion of abandoned crop and pasture land to forest. However, in many areas of the United States, the area of forest is stable or increasing, particularly in many northern states. The opposite problem from flooding has plagued national forests, with loggers complaining that a lack of thinning and proper forest management has resulted in large forest fires.[50][51]

Land area Forest land area[52] 2008 2009 2010 2011 2012 ('000 km2) ('000 mi2) ('000 km2) ('000 mi2) ('000 km2) ('000 mi2) ('000 km2) ('000 mi2) ('000 km2) ('000 mi2) Australia 1,511 583 1,502 580 1,493 576 1,473 569 1,467 566 Brazil 5,239 2,023 5,217 2,014 5,195 2,006 5,183 2,001 5,173 1,997 Canada 3,101 1,197 3,101 1,197 3,101 1,197 3,101 1,197 3,101 1,197 China 2,013 777 2,041 788 2,069 799 2,159 834 2,168 837 European Union 1,559 602 1,564 604 1,569 606 1,573 607 1,578 609 Germany 111 43 111 43 111 43 113 44 113 44 India 681 263 683 264 684 264 693 268 693 268 Indonesia 958 370 951 367 944 364 937 362 931 359 Japan 250 97 250 97 250 97 251 97 251 97 Russia 8,090 3,120 8,090 3,120 8,091 3,124 8,092 3,124 8,093 3,125 United States 3,033 1,171 3,036 1,172 3,040 1,170 3,049 1,177 3,051 1,178 World total 40,318 15,567 40,261 15,545 40,204 15,523 40,184 15,515 39,519 15,258

See also Agroforestry Ancient woodland, an official classification of ancient forest in the United Kingdom. Biomass Biomass (ecology) Bioproduct Biosphere Boreal forest Canopy (biology) Clearcutting Close to nature forestry Cloud forest Chase (land) Deforestation Dendrology Dendrometry Ecological succession Forest dynamics Forest management Forest migration Forest pathology History of the forest in Central Europe Illegal logging Intact forest landscape Jungle (terrain) Kelp forest (A forest made mostly if not entirely of Kelp; an underwater forest) List of countries by forest area List of old-growth forests List of superlative trees List of tree genera List of trees and shrubs by taxonomic family Natural environment Natural landscape Old-growth forest (ancient forest, virgin forest, primary forest) Orchard Permaforestry Plantation (forestry) Primeval forest, a term often used interchangeably with old growth forest Rainforest REDD-plus Savanna Silviculture Stand level modelling Stratification (vegetation) Subalpine forest Taiga, a biome characterized by coniferous forests Temperate broadleaf and mixed forests Temperate coniferous forests Tree Tree allometry Tree farm Trees of the world Tropical rainforest Tropical and subtropical coniferous forests Tropical and subtropical moist broadleaf forests Wildcrafting Wilderness Woodland Woodland management

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Retrieved 3 July 2013.  ^ "Ban on Logging Saves Forests". 25 October 2001.  ^ Liu, Yi Y.; van Dijk, Albert I.J.M.; de Jeu, Richard A.M.; Canadell, Josep G.; McCabe, Matthew F.; Evans, Jason P.; Wang, Guojie (30 March 2015). "Recent reversal in loss of global terrestrial biomass". Nature Climate Change. 5 (5): 470. Bibcode:2015NatCC...5..470L. doi:10.1038/nclimate2581.  ^ "World deforestation slows down as more forests are better managed". Food and Agriculture Organization of the United Nation. Retrieved 2 October 2015.  ^ MacDicken, K.; Jonsson, Ö.; Piña, L.; Maulo, S.; Adikari, Y.; Garzuglia, M.; Lindquist, E.; Reams, G.; D’Annunzio, R. (2015). "Global Forest Resources Assessment 2015" (PDF). Food and Agriculture Organization of the United Nations.  ^ "Canada". Global Forest Watch Canada. Retrieved 2014-11-28.  ^ a b "Canada's Forests". Natural Resources Canada. 2014-10-14. Retrieved 2014-11-28.  ^ "Statistics". Certification status - Canada & the globe. Canadian Sustainable Forestry Certification Coalition. Retrieved 2014-11-28.  ^ "Forestry in 2015 (only in Latvian) | Latvijas statistika". Retrieved 21 December 2017.  ^ "Buklets "Meža nozare Latvijā"". Retrieved 21 December 2017.  ^ "Wildfires Ignite Forest Management Debate". Archived from the original on 2013-05-09. Retrieved 3 July 2013.  ^ Brock, Emily K. (2015). Money Trees: The Douglas Fir and American Forestry, 1900-1944. Oregon State University Press.  ^ "Forest Land Area". FAOSTAT. World Bank. 12 February 2014. 

External links Wikiquote has quotations related to: Forests Look up forest in Wiktionary, the free dictionary. Wikimedia Commons has media related to Forest. Wikisource has the text of the 1906 New International Encyclopedia article Forest. Forests in danger Intact Forests with maps and reports Global Forest Resources Assessment 2005 by the Food and Agriculture Organization – Conservation Cools the Planet Forest area is land under natural or planted stands of trees of at least 5 meters in situ, whether productive or not, and excludes tree stands in agricultural production systems Forest area (sq. km) data from the World Bank's World Development Indicators, made available by Google Luck Baker, Andrew (18 November 2008). "The first forests – Discovery 2008". BBC Online.  "The World's 10 Most Threatened Forest Hotspots". Conservation International. 2 February 2011.   Wilhelm Schlich and Gifford Pinchot (1911). "Forests and Forestry". Encyclopædia Britannica (11th ed.).  v t e Forestry Outline Index Forest areas Ministries Research institutes Colleges Journals Arbor Day Types Agroforestry dehesa Analog forestry Bamboo forestry Close to nature forestry Community forestry Ecoforestry Energy forestry Mycoforestry Permaforestry Plantation forestry Social forestry Sustainable forestry Urban forestry Ecology and management Arboriculture Controlled burn Dendrology Ecological thinning Even-aged management Fire ecology Forest informatics IPM inventory governance law old-growth pathology protection restoration secondary transition Forest certification ATFS CFS FSC PEFC SFI SmartWood Woodland Carbon Code Forestation afforestation reforestation Growth and yield modelling Horticulture GM trees i-Tree urban Silviculture Sustainable management Tree allometry breeding Tree measurement crown girth height volume Environmental topics Acid rain Carbon sequestration Clearcutting Deforestation Ecological services Forest dieback Forest fragmentation High grading Illegal logging Invasive species REDD Shifting cultivation chitemene slash-and-burn slash-and-char svedjebruk Timber recycling Wildfire Wilding Industries Coppicing Forest farming Forest gardening Logging Manufacturing lumber plywood pulp and paper sawmilling Products biochar biomass charcoal non-timber palm oil rayon rubber tanbark Rail transport Tree farm Christmas trees Wood engineered fuel mahogany teak Woodworking Occupations Forester Arborist Bucker Choker setter Ecologist Feller Firefighter handcrew hotshot lookout smokejumper River driver Truck driver Log scaler Lumberjack Ranger Resin tapper Rubber tapper Shingle weaver Timber cruiser Tree planter Wood process engineer Portal Category v t e Natural resources Air Pollution / quality Ambient standards (USA) Index Indoor developing nations Law Clean Air Act (USA) Ozone depletion Emissions Airshed Trading Deforestation (REDD) Energy Law Resources Fossil fuels (peak oil) Geothermal Nuclear Solar sunlight shade Tidal Wave Wind Land Arable peak farmland Degradation Law property Management habitat conservation Minerals mining law sand peak rights Soil conservation fertility health resilience Use planning reserve Life Biodiversity Bioprospecting Biosphere Bushfood Bushmeat Fisheries law management Food Forests genetic resources law management Game law Gene bank Herbalist plants Marine conservation Non-timber forest products Rangeland Seed bank Wildlife conservation management Wood Water Types / location Aquifer storage and recovery Drinking Fresh Groundwater pollution recharge remediation Hydrosphere Ice bergs glacial polar Irrigation Rain harvesting Stormwater Surface water Wastewater reclaimed Aspects Desalination Floods Law Leaching Sanitation Conflict Conservation Peak water Pollution Privatization Quality Right Resources management policy Related Commons enclosure global land tragedy of Economics ecological land Ecosystem services Exploitation overexploitation Earth Overshoot Day Management adaptive Natural capital accounting Nature reserve Systems ecology Urban ecology Wilderness Resource Common-pool Conflict (perpetuation) Curse Depletion Extraction Nationalism Renewable / Non-renewable Portals Agriculture and agronomy Energy Environment Fishing Forestry Mining Water Wetlands Category agencies law management ministries organizations Colleges Natural resources v t e Phytogeography: Vegetation classification Physiognomy Forests, woodlands, arboretum Shrublands, scrubs, thickets, fruticetum Dwarf-shrubland, subshrublands, dwarf-scrubs, suffruticetum Herbaceous communities, grasslands, steppes, prairies, herbetum Savannas, parklands Scarcely vegetated areas, desert vegetation Latitude Tropical Subtropical Temperate Subpolar Polar Climatic regime Pluvial, rainy, ombrophilous Cloudy Seasonal Drought Altitude Montane Submontane Lowland Coastal Leaves Loss of leaves Deciduous, caducifolious Semi-deciduous, semicaducifolious Evergreen, perennifolious Leaf hardness Sclerophyll, stiff leaves Orthophyll, hyptiophyll leaves Leaf form Aciculifolious, needle-leaved Latifolious, broad-leaved Substrate Terrestrial vegetation Aquatic vegetation Riparian Mangrove Swampy See also Biogeographic realms Biomes Floristic kingdoms Plant habits Plant life-forms Vegetation Forestry portal Trees portal Plants portal Environment portal Ecology portal Earth sciences portal Sustainable development portal Authority control GND: 4064354-2 HDS: 7849 NDL: 00571104 Retrieved from "" Categories: ForestsHabitatsTreesEcosystemsHidden categories: CS1 Croatian-language sources (hr)Wikipedia pages semi-protected against vandalismUse dmy dates from April 2012All articles with unsourced statementsArticles with unsourced statements from May 2009Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource referenceWikipedia articles with GND identifiers

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