The Tropical Andes is northern of the three climate-delineated parts of the Andes , the others being the Dry Andes and the Wet Andes . The Tropical Andes' area spans 1,542,644 km (595,618 sq mi).
94-549: The Antamina mine in the Andes Mountains of Peru is one of the largest copper / zinc mines in the world. It is an open pit mine which had an estimated life of mine at 15 years. It also produced molybdenum . The mine is jointly owned by Teck Resources , BHP , Glencore , and Mitsubishi Corporation and independently operated by Compañía Minera Antamina S.A. It produced 390,800 tons of copper concentrate in 2006, 461,000 tons in 2013. The total capital expenditure of
188-615: A chain reaction on other species that depend on the plants. These are just few threats the Tropical Andes faces on a daily basis. The impact on the land is shown by a 75 percent decrease from its original mass. Species affected are decreasing in numbers, and the number of species listed on the Endangered Species Act is increasing. The situation is worse when threatened species are endemic to the Tropical Andes. 14 endemic mammals and 110 endemic birds are threatened in
282-555: A higher potential for larger, high-magnitude earthquakes in the future. The mountain range is also a source of shallow intraplate earthquakes within the South American Plate. The largest such earthquake (as of 2024) struck Peru in 1947 and measured M s 7.5. In the Peruvian Andes, these earthquakes display normal ( 1946 ), strike-slip (1976), and reverse ( 1969 , 1983) mechanisms. The Amazonian Craton
376-408: A hotspot and by 1999 criteria for a hotspot developed to be used globally. A hotspot needs 1,500 endemic vascular plant species and a loss of at least 30 percent of its original land. With these criteria, 25 hotspots were identified in 1999 and published in the journal Nature . They contained at least 44 percent of earth's endemics plants and 35 percent of land vertebrates. The combined area between
470-492: A hotspot's great diversity and endemic species, conservation biology and many other sources conduct research in these locations. Research is also needed considering the amount of threatened species in hotspots. Researchers have the opportunity to preserve many species along with their habitats within hotspots. Some organizations that use hotspots for research are World Conservation Monitoring Centre, Birdlife International, Conservation International, and World Wildlife Fund. Research
564-566: A joint ice stream network. The Andes' dendritic glacier arms, components of valley glaciers, were up to 112.5 km (69.9 mi) long and over 1,250 m (4,101 ft) thick, and spanned a vertical distance of 5,150 m (16,896 ft). The climatic glacier snowline (ELA) was lowered from 4,600 m (15,092 ft) to 3,200 m (10,499 ft) at glacial times. The Andean region cuts across several natural and floristic regions, due to its extension, from Caribbean Venezuela to cold, windy, and wet Cape Horn passing through
658-594: A north–south axis of cultural influences. A long series of cultural development culminated in the expansion of the Inca civilization and Inca Empire in the central Andes during the 15th century. The Incas formed this civilization through imperialistic militarism as well as careful and meticulous governmental management. The government sponsored the construction of aqueducts and roads in addition to pre-existing installations. Some of these constructions still exist today. Devastated by European diseases and by civil war ,
752-711: A series of bends or oroclines . The Bolivian Orocline is a seaward-concave bending in the coast of South America and the Andes Mountains at about 18° S. At this point, the orientation of the Andes turns from northwest in Peru to south in Chile and Argentina . The Andean segments north and south of the Orocline have been rotated 15° counter-clockwise to 20° clockwise respectively. The Bolivian Orocline area overlaps with
846-828: A specific mine is a stub . You can help Misplaced Pages by expanding it . Andes The Andes ( / ˈ æ n d iː z / AN -deez ), Andes Mountains or Andean Mountain Range ( Spanish : Cordillera de los Andes ; Quechua : Anti ) are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America . The range is 8,900 km (5,530 mi) long and 200 to 700 km (124 to 435 mi) wide (widest between 18°S and 20°S latitude ) and has an average height of about 4,000 m (13,123 ft). The Andes extend from South to North through seven South American countries: Argentina , Chile , Bolivia , Peru , Ecuador , Colombia , and Venezuela . Along their length,
940-634: A typical location for calc-alkalic and subduction volcanism, the Andean Volcanic Belt has a large range of volcano-tectonic settings, such as rift systems, extensional zones, transpressional faults , subduction of mid-ocean ridges , and seamount chains apart from a large range of crustal thicknesses and magma ascent paths, and different amount of crustal assimilations. The Andes Mountains host large ore and salt deposits, and some of their eastern fold and thrust belts act as traps for commercially exploitable amounts of hydrocarbons . In
1034-536: A whole glacier in the ablation area or in the accumulation area . In the high Andes of Central Chile and Mendoza Province , rock glaciers are larger and more common than glaciers; this is due to the high exposure to solar radiation . In these regions, glaciers occur typically at higher altitudes than rock glaciers. The lowest active rock glaciers occur at 900 m a.s.l. in Aconcagua . Though precipitation increases with height, there are semiarid conditions in
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#17327869530631128-780: A zone of volcanic activity that encompasses the Pacific rim of the Americas as well as the Asia-Pacific region. The Andes are the result of tectonic plate processes extending during the Mesozoic and Tertiary eras, caused by the subduction of oceanic crust beneath the South American Plate as the Nazca Plate and South American Plate converge. These processes were accelerated by the effects of climate. As
1222-561: Is a result of the subduction of the Nazca Plate and Antarctic Plate underneath the South American Plate. The belt is subdivided into four main volcanic zones that are separated from each other by volcanic gaps. The volcanoes of the belt are diverse in terms of activity style, products, and morphology. While some differences can be explained by which volcanic zone a volcano belongs to, there are significant differences inside volcanic zones and even between neighboring volcanoes. Despite being
1316-551: Is actively underthrusted beneath the sub-Andes region of Peru, producing thrust faults. In Colombia, Ecuador, and Peru, thrust faulting occurs along the sub-Andes due in response to compression brought on by subduction, while in the high Andes, normal faulting occurs in response to gravitational forces. In the extreme south, a major transform fault separates Tierra del Fuego from the small Scotia Plate . The Andes range has many active volcanoes distributed in four volcanic zones separated by areas of inactivity. The Andean volcanism
1410-417: Is also causing an increase in diseases among amphibians. Considering that the Tropical Andes is recorded to have the most amphibians, some restricted to this location, diseases could decrease the diversity greatly. Another factor is that 400 of the amphibian species are already threatened. These deadly fungi have actually been linked to the extinction of dinosaurs. One chytrid fungus that is infecting amphibians
1504-588: Is also done on humans' impact to the hotspots land and species that reside in them. Funding for hotspot conservation has been estimated at $ 750 million accumulated over the past fifteen years. By focusing research on hotspots, many species can be helped at once. One specific research studies fire's impact on vegetation in Northern Ecuador of the Tropical Andes. This location's variety of vegetation includes different forests, land used for agricultural and páramo, or tropical alpine found at 4,500 meters. Páramo
1598-408: Is another endemic animal that is endangered. They are one of the rarest mammals, with a recorded population of 250 found in the cloud forests of Peru. They are threatened by humans causing habitat loss and fragmentation of their habitat. Their slow maturity and low population densities do not help. Programs have tried to relocate them to secondary forests, but attempts have failed. Many species reside in
1692-521: Is dominated by grasses but still high in diversity. The article "Fire Ecology and Conservation in the High Tropical Andes: Observations from Northern Ecuador" looks at páramo's ability to withstand disturbances such as fire. Humans have lived in this location for 7,000 years, and the páramo has been through fires and grazing. The writer believes that policies used to implement fire suppression are not probable or beneficiary to
1786-471: Is natural, or the result of clearing which began during the Incan period. Regardless, in modern times , the clearance has accelerated, and the trees are now considered highly endangered , with some believing that as little as 10% of the original woodland remains. The Andes are rich in fauna: With almost 1,000 species, of which roughly 2/3 are endemic to the region, the Andes are the most important region in
1880-438: Is said to be the most diverse of the world's scientific hotspots of diversity. The journal Nature contained an article by Norman Myers comparing the 25 hotspots with land and species in 2000. At the time, the Tropical Andes was recorded to have 45,000 plant species with the next closest hotspots recorded to have 25,000 plant species. Actually a sixth of all plant species can reside in the Tropical Andes. The Tropical Andes also has
1974-464: Is the Andean bromelilad , an endemic plant that takes up to 100 years to mature and a common diet for species that forage. Other plant species include many crops such as tobacco and potatoes. Some endemic animals have the Andean condor , which almost became extinct from hunting. Thanks to a conservation reintroduction program, their numbers are growing. Another threatened endemic bird in the Tropical Andes
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#17327869530632068-649: Is the batrachochytrium dendrobatidis . This fungus will impair the amphibian's skin and reduce its ability to absorb. One example of an amphibian in the Tropical Andes is the genus Atelopus , with 56 of the species Critically Endangered. Due to increase in temperature, the fungus has the ability to spread rapidly and thrive on living amphibians. A new threat that is being researched is the effect from nitrogen deposition . Studies done in Europe have shown diversity among plants decreased due to nitrogen deposition. Current models are estimating what could happen to hotspots across
2162-489: Is the yellow-eared parrot . One threat this species faces is the loss of the vulnerable wax palm. The yellow-eared parrot uses the wax palm for nesting and roosting. However, humans, especially in Colombia, are removing the vulnerable wax palm from the wild for Palm Sunday . Some conservation programs are helping the situation to educate churches to use other resources besides the vulnerable wax palm. The yellow-tailed monkey
2256-1591: Is the largest city of all Andean countries. It is the seat of the Andean Community of Nations . La Paz , Bolivia 's seat of government, is the highest capital city in the world, at an elevation of approximately 3,650 m (11,975 ft). Parts of the La Paz conurbation, including the city of El Alto , extend up to 4,200 m (13,780 ft). Other cities in or near the Andes include Bariloche , Catamarca , Jujuy , Mendoza , Salta , San Juan , Tucumán , and Ushuaia in Argentina; Calama and Rancagua in Chile; Cochabamba , Oruro , Potosí , Sucre , Tarija , and Yacuiba in Bolivia; Arequipa , Cajamarca , Cusco , Huancayo , Huánuco , Huaraz , Juliaca , and Puno in Peru; Ambato , Cuenca , Ibarra , Latacunga , Loja , Riobamba , and Tulcán in Ecuador; Armenia , Cúcuta , Bucaramanga , Duitama , Ibagué , Ipiales , Manizales , Palmira , Pasto , Pereira , Popayán , Sogamoso , Tunja , and Villavicencio in Colombia; and Barquisimeto , La Grita , Mérida , San Cristóbal , Tovar, Trujillo , and Valera in Venezuela. The cities of Caracas , Valencia , and Maracay are in
2350-404: The 2010 Maule earthquake (M8.8), the 2015 Illapel earthquake (M8.2), and the 1960 Valdivia earthquake (M9.5), which as of 2024 was the strongest ever recorded on seismometers. The amount, magnitude, and type of seismic activity varies greatly along the subduction zone. These differences are due to a wide range of factors, including friction between the plates, angle of subduction, buoyancy of
2444-682: The Americas and Antarctica . The etymology of the word Andes has been debated. The majority consensus is that it derives from the Quechua word anti "east" as in Antisuyu (Quechua for "east region"), one of the four regions of the Inca Empire . The term cordillera comes from the Spanish word cordel "rope" and is used as a descriptive name for several contiguous sections of
2538-404: The Andean cock-of-the-rock , while mixed-species flocks dominated by tanagers and furnariids are commonly seen—in contrast to several vocal but typically- cryptic species of wrens , tapaculos , and antpittas . A number of species such as the royal cinclodes and white-browed tit-spinetail are associated with Polylepis , and consequently also threatened . The Andes Mountains form
2632-592: The Caribbean Sea off the coast of Venezuela, were formerly thought to represent the submerged peaks of the extreme northern edge of the Andes range, but ongoing geological studies indicate that such a simplification does not do justice to the complex tectonic boundary between the South American and Caribbean plates . The Andes are an orogenic belt of mountains along the Pacific Ring of Fire ,
2726-535: The Cenozoic . Tectonic forces above the subduction zone along the entire west coast of South America where the Nazca Plate and a part of the Antarctic Plate are sliding beneath the South American Plate continue to produce an ongoing orogenic event resulting in minor to major earthquakes and volcanic eruptions to this day. Many high-magnitude earthquakes have been recorded in the region, such as
2820-694: The Tropical Andes , the Dry Andes , and the Wet Andes . The Andes are the highest mountain range which is outside of Asia . The range's highest peak, Argentina's Aconcagua , rises to an elevation of about 6,961 m (22,838 ft) above sea level. The peak of Chimborazo in the Ecuadorian Andes is farther from the Earth's center than any other location on the Earth's surface, due to
2914-582: The Venezuelan Coastal Range , which is a debatable extension of the Andes at the northern extremity of South America. Cities and large towns are connected with asphalt -paved roads, while smaller towns are often connected by dirt roads, which may require a four-wheel-drive vehicle. The rough terrain has historically put the costs of building highways and railroads that cross the Andes out of reach of most neighboring countries, even with modern civil engineering practices. For example,
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3008-674: The War of the Pacific between Chile and the allied Bolivia and Peru, in a diplomatic deal to keep Peru out of the war. The Chilean Army and Chilean Navy defeated the combined forces of Bolivia and Peru, and Chile took over Bolivia's only province on the Pacific Coast, some land from Peru that was returned to Peru decades later. Bolivia has been completely landlocked ever since. It mostly uses seaports in eastern Argentina and Uruguay for international trade because its diplomatic relations with Chile have been suspended since 1978. Because of
3102-602: The equatorial bulge resulting from the Earth's rotation . The world's highest volcanoes are in the Andes, including Ojos del Salado on the Chile-Argentina border, which rises to 6,893 m (22,615 ft). The Andes are also part of the American Cordillera , a chain of mountain ranges ( cordillera ) that consists of an almost continuous sequence of mountain ranges that form the western "backbone" of
3196-483: The rodent order, inhabit the Andes' alpine regions. The Andean condor , the largest bird of its kind in the Western Hemisphere , occurs throughout much of the Andes but generally in very low densities. Other animals found in the relatively open habitats of the high Andes include the huemul , cougar , foxes in the genus Pseudalopex , and, for birds, certain species of tinamous (notably members of
3290-703: The 1,000-kilometer-wide (620 mi) Drake Passage lie the mountains of the Antarctic Peninsula south of the Scotia Plate , which appear to be a continuation of the Andes chain. The far east regions of the Andes experience a series of changes resulting from the Andean orogeny. Parts of the Sunsás Orogen in Amazonian craton disappeared from the surface of the earth, being overridden by
3384-469: The 25 hotspots used to cover 11.8 percent of land. The total amount of land has reduced from 17 million km to 2 million km , or about 85% of the land. This leaves this great biodiversity limited to about 1 percent of Earth's land surface. There are a little over 30 hotspots now recorded and used for research. A few other hotspots include the Caribbean Islands , Himalaya , and Japan . Due to
3478-469: The Andean peoples are those of the Quechua and Aymara language families. Woodbine Parish and Joseph Barclay Pentland surveyed a large part of the Bolivian Andes from 1826 to 1827. In modern times, the largest cities in the Andes are Bogotá , with a metropolitan population of over ten million, and Santiago , Medellín , Cali , and Quito . Lima is a coastal city adjacent to the Andes and
3572-405: The Andes are tobacco and potatoes . The high-altitude Polylepis forests and woodlands are found in the Andean areas of Colombia , Ecuador , Peru , Bolivia , and Chile . These trees, by locals referred to as Queñua, Yagual, and other names, can be found at altitudes of 4,500 m (14,760 ft) above sea level. It remains unclear if the patchy distribution of these forests and woodlands
3666-510: The Andes are split into several ranges, separated by intermediate depressions . The Andes are the location of several high plateaus —some of which host major cities such as Quito , Bogotá , Cali , Arequipa , Medellín , Bucaramanga , Sucre , Mérida , El Alto , and La Paz . The Altiplano Plateau is the world's second highest after the Tibetan Plateau . These ranges are in turn grouped into three major divisions based on climate:
3760-521: The Andes end at the Pacific Ocean , although the Peru-Chile trench can be considered their ultimate western limit. From a geographical approach, the Andes are considered to have their western boundaries marked by the appearance of coastal lowlands and less-rugged topography. The Andes also contain large quantities of iron ore located in many mountains within the range. The Andean orogen has
3854-462: The Andes such as the Incas have practiced irrigation techniques for over 6,000 years. Because of the mountain slopes, terracing has been a common practice. Terracing, however, was only extensively employed after Incan imperial expansions to fuel their expanding realm. The potato holds a very important role as an internally-consumed staple crop. Maize was also an important crop for these people, and
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3948-526: The Andes varies greatly depending on latitude, altitude, and proximity to the sea. Temperature, atmospheric pressure, and humidity decrease in higher elevations. The southern section is rainy and cool, while the central section is dry. The northern Andes are typically rainy and warm, with an average temperature of 18 °C (64 °F) in Colombia . The climate is known to change drastically in rather short distances. Rainforests exist just kilometers away from
4042-542: The Andes, as well as the entire Andean range, and the combined mountain chain along the western part of the North and South American continents. The Andes can be divided into three sections: At the northern end of the Andes, the separate Sierra Nevada de Santa Marta range is often, but not always, treated as part of the Northern Andes. The Leeward Antilles islands Aruba , Bonaire , and Curaçao , which lie in
4136-524: The Andes. The Sierras de Córdoba , where the effects of the ancient Pampean orogeny can be observed, owe their modern uplift and relief to the Andean orogeny in the Tertiary . Further south in southern Patagonia , the onset of the Andean orogeny caused the Magallanes Basin to evolve from being an extensional back-arc basin in the Mesozoic to being a compressional foreland basin in
4230-491: The Incas were defeated in 1532 by an alliance composed of tens of thousands of allies from nations they had subjugated (e.g. Huancas , Chachapoyas , Cañaris ) and a small army of 180 Spaniards led by Francisco Pizarro . One of the few Inca sites the Spanish never found in their conquest was Machu Picchu , which lay hidden on a peak on the eastern edge of the Andes where they descend to the Amazon. The main surviving languages of
4324-478: The Patagonian Orocline. The western rim of the South American Plate has been the place of several pre-Andean orogenies since at least the late Proterozoic and early Paleozoic , when several terranes and microcontinents collided and amalgamated with the ancient cratons of eastern South America, by then the South American part of Gondwana . The formation of the modern Andes began with
4418-566: The Tropical Andes and negatively pressured cloud forests. The 25 percent of land that is protected is still poorly managed with little help from the public from lack of education. Invasive species have also been a threat to the Tropical Andes' land and species, possibly brought in by humans. Invasive species include the American bullfrog and certain grasses used for cattle. Humans have the ability to cause habitat loss and habitat fragmentation for species. The forest habitats that are threatened in
4512-469: The Tropical Andes are modified and destroyed 30 percent faster than lower tropical areas. Fragmentation causes a separation within species and decreases the diversity of genes. There is the possibility of inbreeding to increase as well. An article also looked at fragmentation causing certain phenotypes to arise in organisms. By studying feathers of 2,500 individual bird species within nine forests, observation showed asymmetry linked with fragmentation. Asymmetry
4606-450: The Tropical Andes but are threatened severely. amen sister There are many threats that the Tropical Andes faces every day. One of the main threats is human activities, especially with increasing population. Some activities include mining, logging, and construction. Humans also use land for agriculture and keep relocating once the land is used up. Valleys are severely degraded due to humans living there. Hydroelectric dams have also been put in
4700-455: The Tropical Andes. All hotspots are important for conservation biology , but especially the tropical Andes with so many endemic species. The biodiversity within the Tropical Andes is dwindling in numbers due to threats. The diversity of vegetation at different elevations was further studied in Colombia. Chengyu Weng studied how pollen diversity is affected by different temperatures due to changing elevation. The team studied different vegetation,
4794-455: The ability to trace glacier water melting into watersheds using isotopes. Global warming can lead to the extinction of many species, especially in hotspots. A study done by Jay Malcolm predicts that less than 1 percent up to 43 percent of endemic biota will become extinct due to global warming. He also believes the Tropical Andes is in the top six vulnerable hotspots, with the possibility of plant extinction exceeding 2000 species. Global warming
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#17327869530634888-443: The air that hold in heat. Some locations are increasing in temperature and others decreasing. The change in temperatures has a major effect on the Tropical Andes; some say that this is more negative than deforestation. One serious issue is the melting of the glaciers in the mountains. It is estimated that 80 percent of freshwater comes from mountains and with them melting about half of the Earth's population will be affected. All over
4982-592: The area of the maximum width of the Altiplano Plateau , and according to Isacks (1988) the Orocline is related to crustal shortening . The specific point at 18° S where the coastline bends is known as the Arica Elbow. Further south lies the Maipo Orocline, a more subtle orocline between 30° S and 38°S with a seaward-concave break in the trend at 33° S. Near the southern tip of the Andes lies
5076-468: The article's chart, five EBAs with habitat loss are located in the Tropical Andes. By studying the effect of human activities on EBAs that are losing avian populations, plans to help the future of other EBAs are possible. Their results showed that if a species has habitat specificity and is large in size, the chance of extinction increases. Habitat loss will impact those with habitat specificity greatly. Conservation goals need to look into human activities and
5170-575: The belief of spectacled bears being nocturnal and no change in patterns between seasons because only slight change in temperature. The radio collars proved these spectacled bears to be diurnal. The bears were in motion from sunrise to sunset with periods of rest in between. There was a small change in level of activity between seasons, with an increase during the dry season. Due to the technology of radio collars, hypotheses about these bears were tested. By knowing their habitat and lifestyle, we can better understand and help threatened species. The Tropical Andes
5264-440: The bird's habitat specificity in order to make a positive impact. An example of research on a specific threatened species in the Tropical Andes is the rare Tremarctos ornatus , also known as Andean (or spectacled) bears . Two males were captured, and radio collars were attached in order to track and study their habits and movement. They portrayed similar patterns compared to many other bear species. These findings contrasted with
5358-399: The dry climate that reduced the disturbing actions of meteoric water . The dry climate in the central western Andes has also led to the creation of extensive saltpeter deposits which were extensively mined until the invention of synthetic nitrates . Yet another result of the dry climate are the salars of Atacama and Uyuni , the former being the largest source of lithium and the latter
5452-532: The dry season (winter) possible and allows the cultivation of frost-resistant vegetable crops like onion and carrot . The Andes rose to fame for their mineral wealth during the Spanish conquest of South America . Although Andean Amerindian peoples crafted ceremonial jewelry of gold and other metals, the mineralizations of the Andes were first mined on a large scale after the Spanish arrival. Potosí in present-day Bolivia and Cerro de Pasco in Peru were among
5546-501: The establishment of the century-long Inca Empire . This all changed in the 16th century, when the Spanish conquistadors colonized the mountains in advance of the mining economy. In the tide of anti-imperialist nationalism, the Andes became the scene of a series of independence wars in the 19th century, when rebel forces swept through the region to overthrow Spanish colonial rule. Since then, many former Spanish territories have become five independent Andean states. The climate in
5640-705: The events of the Triassic , when Pangaea began the breakup that resulted in developing several rifts . The development continued through the Jurassic Period. It was during the Cretaceous Period that the Andes began to take their present form, by the uplifting , faulting , and folding of sedimentary and metamorphic rocks of the ancient cratons to the east. The rise of the Andes has not been constant, as different regions have had different degrees of tectonic stress, uplift, and erosion . Across
5734-423: The extreme in the slopes near the virtually-lifeless Atacama Desert. About 30,000 species of vascular plants live in the Andes, with roughly half being endemic to the region, surpassing the diversity of any other hotspot . The small tree Cinchona pubescens , a source of quinine which is used to treat malaria , is found widely in the Andes as far south as Bolivia. Other important crops that originated from
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#17327869530635828-464: The forelands of the Atacama Desert , some of the largest porphyry copper mineralizations occur, making Chile and Peru the first- and second-largest exporters of copper in the world. Porphyry copper in the western slopes of the Andes has been generated by hydrothermal fluids (mostly water) during the cooling of plutons or volcanic systems. The porphyry mineralization further benefited from
5922-555: The genus Nothoprocta ), Andean goose , giant coot , flamingos (mainly associated with hypersaline lakes), lesser rhea , Andean flicker , diademed sandpiper-plover , miners , sierra-finches and diuca-finches . Lake Titicaca hosts several endemics, among them the highly endangered Titicaca flightless grebe and Titicaca water frog . A few species of hummingbirds , notably some hillstars , can be seen at altitudes above 4,000 m (13,100 ft), but far higher diversities can be found at lower altitudes, especially in
6016-512: The glaciers were over ten times longer. On the east side of this section of the Mendozina Andes, they flowed down to 2,060 m (6,759 ft) and on the west side to about 1,220 m (4,003 ft) above sea level. The massifs of Aconcagua (6,961 m (22,838 ft)), Tupungato (6,550 m (21,490 ft)), and Nevado Juncal (6,110 m (20,046 ft)) are tens of kilometres away from each other and were connected by
6110-401: The highest elevations of 3,000 to 4,800 meters (9,800–15,700 ft) contain grasslands up to snow. The most diverse cloud forests found in Peru and Bolivia covers 500,000 km (190,000 sq mi). Dry forests and woodlands are also found throughout the Tropical Andes. The range is also home to the deepest gorge in Peru at 3,223 meters (10,574 ft) deep and Lake Titicaca ,
6204-633: The highest navigable water with an elevation of 3,810 meters (12,500 ft). The Tropical Andes are a biodiversity hotspot named the "global epicentre of biodiversity" according to the Critical Ecosystem Partnership Fund . The Tropical Andes is an area of rich biodiversity . This location contains about 45,000 plant species of which 20,000 are endemic. There are over 3,000 vertebrate species with about 1,500 endemics. Besides plants and vertebrates, 1,666 bird species, 479 reptile species, and 830 amphibian species reside in
6298-636: The hotspot include: A hotspot can be identified as an area with great biological diversity with high endemism. The location must also have lost a significant amount of land and threatened species, according to the fourth edition of the Essentials of Conservation Biology . The term "hotspots" was used by Norman Myers written to describe ten tropical forests. The forests contained the characteristics of high levels of plant endemism and loss of habitats . Myers went on to add eight more hotspots by 1990. The Conservation International reassessed Myers definition of
6392-556: The humid Andean forests (" cloud forests ") growing on slopes in Colombia, Ecuador, Peru, Bolivia, and far northwestern Argentina. These forest-types, which includes the Yungas and parts of the Chocó, are very rich in flora and fauna, although few large mammals exist, exceptions being the threatened mountain tapir , spectacled bear , and yellow-tailed woolly monkey . Birds of humid Andean forests include mountain toucans , quetzals , and
6486-517: The hyperarid Atacama Desert . Rainforests and tropical dry forests used to encircle much of the northern Andes but are now greatly diminished , especially in the Chocó and inter-Andean valleys of Colombia. Opposite the humid Andean slopes are the relatively dry Andean slopes in most of western Peru, Chile, and Argentina. Along with several Interandean Valles , they are typically dominated by deciduous woodland, shrub and xeric vegetation, reaching
6580-555: The larger glaciers descend to sea level. The Andes of Chile and Argentina can be divided into two climatic and glaciological zones: the Dry Andes and the Wet Andes . Since the Dry Andes extend from the latitudes of the Atacama Desert to the area of the Maule River , precipitation is more sporadic, and there are strong temperature oscillations. The line of equilibrium may shift drastically over short periods of time, leaving
6674-523: The main crossover of the Andes between Argentina and Chile is still accomplished through the Paso Internacional Los Libertadores . Only recently have the ends of some highways that came rather close to one another from the east and the west been connected. Much of the transportation of passengers is done via aircraft. However, there is one railroad that connects Chile with Peru via the Andes, and there are others that make
6768-495: The mine by 2013 was US$ 2.3 billion. İt is located at an altitude of 4,300 meters above sea level. In 2014, unionized mine workers went on strike over pay and benefits. At the time of its development, the mine was Peru's largest investment project at $ 2.3 billion. Part of the country's dependence on mining , it was expected to raise exports by $ 900 million. In 2010, the mine underwent an expansion program that increased its processing capacity by 31%. As of March 2023,
6862-399: The mine is expected to shut down in 2028. A $ 2 billion investment to extend the lifespan to 2036 is underway pending approval of an environmental impact study . Many residents of land that is now the mine sold their property in the hopes that the mine would uplift the local economy, but there was little effect to jobs or infrastructure. Villagers living nearby complain that dust thrown up by
6956-458: The mine is toxic. Mine officials, along with President Ollanta Humala , denied that the mine was unsafe. In November 2021, the rural Aquia community blockaded the mine's operations. Protestors alleged that the mine had not fully paid the community for the land, which the company disputed. The company launched an initiative, FOGEL, with the stated aim of strengthening the capacities of local governments and communities. This article about
7050-399: The most endemic plant species at 20,000, while the next hotspot contains 15,000. The Tropical Andes has a lot of land compared to other hotspots but is not the largest. That the large land area shows the Tropical Andes can provide biodiversity with a diverse landscape. Many endemic plant and animal species are currently threatened in the Tropical Andes. An example of a threatened plant species
7144-576: The nearly-7,000-metre (22,966 ft) highest mountains of the Andes. This dry steppe climate is considered to be typical of the subtropical position at 32–34° S. The valley bottoms have no woods, just dwarf scrub. The largest glaciers, for example the Plomo Glacier and the Horcones Glaciers, do not even reach 10 km (6.2 mi) in length and have only insignificant ice thickness. At glacial times, however, c. 20,000 years ago,
7238-479: The original land. Due to the massive amount of area the landscape is diverse. Diverse landscapes lead to diverse habitats and the ability to provide needed resources for many species. The diverse landscape includes snow-topped mountains down to canyons and valleys. The different vegetation as elevation changes includes tropical rainforests at 500 to 1,500 meters (1,600–4,900 ft), cloud forests ranging from 800 to 3,500 meters (2,600–11,500 ft), and
7332-770: The plant. Policies instead should be written up according to specific plant species and impact on natives living there. This is a small example of research in the Tropical Andes that could make a big impact to saving diversity. Further research is also processed on looking into the decrease in avian populations, focusing in hotspots due to its massive diversity. The study focuses in Endemic Bird Areas or EBAs in order to understand why they become extinct and possible conservation plans. As of 2003 there were 218 EBAs, with over 30 percent of bird species threatened. EBAs located in hotspots interfere with many human activities, leading to habitat loss in 51 percent of EBAs. According to
7426-688: The principal mines of the Spanish Empire in the New World. Río de la Plata and Argentina derive their names from the silver of Potosí. Tropical Andes The Tropical Andes are located in South America following the path of the Andes. They run, mainly, through five countries, Venezuela , Colombia , Ecuador , Peru , and Bolivia . The land initially was roughly 1,258,000 km (486,000 sq mi) but has decreased to 314,500 km (121,400 sq mi), leaving 25% of
7520-402: The rainy season (summer), part of the rangeland is used for cropping (mainly potatoes, barley, broad beans, and wheat). Irrigation is helpful in advancing the sowing data of the summer crops, which guarantees an early yield in periods of food shortage. Also, by early sowing, maize can be cultivated higher up in the mountains (up to 3,800 m (12,500 ft)). In addition, it makes cropping in
7614-460: The same connection via southern Bolivia. There are multiple highways in Bolivia that cross the Andes. Some of these were built during a period of war between Bolivia and Paraguay , in order to transport Bolivian troops and their supplies to the war front in the lowlands of southeastern Bolivia and western Paraguay. For decades, Chile claimed ownership of land on the eastern side of the Andes. However, these claims were given up in about 1870 during
7708-721: The snow-covered peak of Cotopaxi . The mountains have a large effect on the temperatures of nearby areas. The snow line depends on the location. It is between 4,500 and 4,800 m (14,764 and 15,748 ft) in the tropical Ecuadorian, Colombian, Venezuelan, and northern Peruvian Andes, rising to 4,800–5,200 m (15,748–17,060 ft) in the drier mountains of southern Peru and northern Chile south to about 30°S before descending to 4,500 m (14,760 ft) on Aconcagua at 32°S , 2,000 m (6,600 ft) at 40°S , 500 m (1,640 ft) at 50°S , and only 300 m (980 ft) in Tierra del Fuego at 55°S ; from 50°S, several of
7802-593: The subandean forest, Andean forest, subparamo, and grass paramo located in the Andes. There was more plant diversity as elevation increased throughout the vegetations. Pollen diversity positively correlated with more diversity at lower elevation. With these findings, they were able to see changes in plant diversity in the past 430000 years. During hot temperatures, pollen diversity increased at higher elevations, from plant species moving up. Cooler temperatures saw pollen diversity in lower elevations. The study explains how temperature influences plant diversity. The ecoregions in
7896-526: The subducting plate, rate of subduction, and hydration value of the mantle material. The highest rate of seismic activity is observed in the central portion of the boundary, between 33°S and 35°S. In this area, the angle of subduction is very low, meaning the subducting plate is nearly horizontal. Studies of mantle hydration across the subduction zone have shown a correlation between increased material hydration and lower-magnitude, more-frequent seismic activity. Zones exhibiting dehydration instead are thought to have
7990-637: The subduction of the Nazca Plate and the Antarctic Plate . To the east, the Andes range is bounded by several sedimentary basins , such as the Orinoco Basin , the Amazon Basin , the Madre de Dios Basin, and the Gran Chaco , that separate the Andes from the ancient cratons in eastern South America. In the south, the Andes share a long boundary with the former Patagonia Terrane . To the west,
8084-452: The tortuous terrain in places, villages and towns in the mountains—to which travel via motorized vehicles is of little use—are still located in the high Andes of Chile, Bolivia, Peru, and Ecuador . Locally, the relatives of the camel , the llama , and the alpaca continue to carry out important uses as pack animals, but this use has generally diminished in modern times. Donkeys , mules , and horses are also useful. The ancient peoples of
8178-477: The uplift of the Andes created a rain shadow on the western fringes of Chile, ocean currents and prevailing winds carried moisture away from the Chilean coast. This caused some areas of the subduction zone to be sediment-starved, causing excess friction and an increased rate of compressed coastal uplift. The main cause of the rise of the Andes is the compression of the western rim of the South American Plate due to
8272-642: The world for amphibians . The diversity of animals in the Andes is high, with almost 600 species of mammals (13% endemic), more than 1,700 species of birds (about 1/3 endemic), more than 600 species of reptiles (about 45% endemic), and almost 400 species of fish (about 1/3 endemic). The vicuña and guanaco can be found living in the Altiplano , while the closely related domesticated llama and alpaca are widely kept by locals as pack animals and for their meat and wool . The crepuscular (active during dawn and dusk) chinchillas , two threatened members of
8366-498: The world glaciers are melting, but the mountains in the Tropical Andes are very susceptible. It is said that a quarter of the Tropical Andes glacier has already begun retreating. These glaciers make up many species water supply, and the location could be in crisis if they melt away. Glaciers in the Andes provide two main functions; decrease seasonal discharge variability and provide greater specific discharge. The article by Bryan Mark predicts an increase in discharge as glaciers melt, with
8460-403: The world if nitrogen deposition keeps increasing. By comparing to past research, nitrogen deposition has already increased 50 percent since the 1990s. The estimation for the future shows an increase by 100 percent in 2050. Considering the great plant diversity in the Tropical Andes, especially so many endemics, nitrogen deposition could be a severe threat. The decrease in plant diversity could cause
8554-470: The world's largest reserve of the element. Early Mesozoic and Neogene plutonism in Bolivia's Cordillera Central created the Bolivian tin belt as well as the famous, now-mostly-depleted, deposits of Cerro Rico de Potosí . The Andes Mountains, initially inhabited by hunter-gatherers , experienced the development of agriculture and the rise of politically centralized civilizations , which culminated in
8648-399: Was found in secondary forests and edge habitats but different species. The agricultural land and primary forest held the lowest diversity. This study suggests that within Andean montane forests, preserving secondary forests offers most benefit for these threatened birds. Another serious threat to the Tropical Andes is global warming , the effect of too much of greenhouse gasses trapped in
8742-517: Was lowest if the forest continued and highest with small or medium fragmentation. They suggest asymmetry of bird feathers influenced by the stress of fragmentation and changing environments. That is one outcome from fragmentation in the Tropical Andes. A study by Niall O'Dea looks at bird communities in general and how habitat degradation impacts them. He compared the bird communities that reside in primary forests, secondary forests, edge habitat and agricultural land, all modified by humans. Most diversity
8836-408: Was used for the production of chicha , important to Andean native people. Currently, tobacco , cotton , and coffee are the main export crops. Coca , despite eradication programs in some countries, remains an important crop for legal local use in a mildly stimulating herbal tea , and illegally for the production of cocaine . In unirrigated land, pasture is the most common type of land use. In
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