Beavers are large, semiaquatic rodents of the Northern Hemisphere. There are two existing species: the North American beaver and the Eurasian beaver. Beavers are the second-largest living rodents, after capybaras, weighing up to 50 kg (110 lb). They have stout bodies with large heads, long chisel-like incisors, brown or gray fur, hand-like front feet, webbed back feet, and tails that are flat and scaly. The two species differ in skull and tail shape and fur color. Beavers can be found in a number of freshwater habitats, such as rivers, streams, lakes and ponds. They are herbivorous, consuming tree bark, aquatic plants, grasses and sedges.
Tierra del Fuego is an archipelago off the southernmost tip of the South American mainland, across the Strait of Magellan.
Ushuaia is the capital of Tierra del Fuego, Antártida e Islas del Atlántico Sur Province, Argentina. With a population of 82,615 and a location below the 54th parallel south latitude, Ushuaia claims the title of world's southernmost city.
The culpeo, also known as culpeo zorro, Andean zorro, Andean fox, Paramo wolf, Andean wolf, and colpeo fox, is a species of South American fox. Regardless of the name, it is not a true fox, but more closely related to wolves and jackals. Its appearance resembles that of foxes due to convergent evolution.
Tierra del Fuego, officially the Province of Tierra del Fuego, Antarctica and South Atlantic Islands, is the southernmost, smallest, and least populous Argentine province. The provincial capital city is Ushuaia, from a native word meaning "bay towards the end".
Isla Grande de Tierra del Fuego also formerly Isla de Xátiva is an island near the southern tip of South America from which it is separated by the Strait of Magellan. The western portion (61.4%) of the island is in Chile, while the eastern portion is in Argentina. It forms the major landmass in an extended group of islands or archipelago also known as Tierra del Fuego.
The Eurasian beaver or European beaver is a species of beaver that was once widespread in Eurasia, but was hunted to near-extinction for both its fur and castoreum. At the turn of the 20th century, only about 1,200 beavers survived in eight relict populations in Europe and Asia. It has been reintroduced to much of its former range, and now occurs from Spain, Central Europe, Great Britain and Scandinavia to a few regions in China and Mongolia. It is listed as least concern on the IUCN Red List, as it recovered well in most of Europe. It is extirpated in Portugal, Moldova, and Turkey.
The North American beaver is one of two extant beaver species, along with the Eurasian beaver. It is native to North America and has been introduced in South America (Patagonia) and Europe. The North American beaver is one of the official national wildlife of Canada symbols and is the official state mammal of Oregon and New York. North American beavers are widespread across the continental United States, Canada, southern Alaska, and some parts of northern Mexico.
The South American gray fox, also known as the Patagonian fox, the chilla or the gray zorro, is a species of Lycalopex, the "false" foxes. It is endemic to the southern part of South America.
Aquatic and semiaquatic mammals are a diverse group of mammals that dwell partly or entirely in bodies of water. They include the various marine mammals who dwell in oceans, as well as various freshwater species, such as the European otter. They are not a taxon and are not unified by any distinct biological grouping, but rather their dependence on and integral relation to aquatic ecosystems. The level of dependence on aquatic life varies greatly among species. Among freshwater taxa, the Amazonian manatee and river dolphins are completely aquatic and fully dependent on aquatic ecosystems. Semiaquatic freshwater taxa include the Baikal seal, which feeds underwater but rests, molts, and breeds on land; and the capybara and hippopotamus which are able to venture in and out of water in search of food.
Navarino Island is a Chilean island located between Isla Grande de Tierra del Fuego, to the north, and Cape Horn, to the south. The island forms part of the Commune of Cabo de Hornos, the southernmost commune in Chile and in the world, belonging to Antártica Chilena Province in the XII Region of Magallanes and Chilean Antarctica. Its population is concentrated primarily in the communal capital, Puerto Williams, and in small settlements like Puerto Navarino, Río Guanaco and Puerto Toro. The highest point of the island is Pico Navarino at 1,195 m (3,921 ft). The island is a popular destination for fly-fishers.
The Magellanic woodpecker is a species of large woodpecker found in southern Chile and southwestern Argentina; it is resident within its range. This species is the southernmost example of the genus Campephilus, which includes the famous ivory-billed woodpecker.
A beaver dam or beaver impoundment is a dam built by beavers to create a pond which protects against predators such as coyotes, wolves and bears, and holds their food during winter. These structures modify the natural environment in such a way that the overall ecosystem builds upon the change, making beavers a keystone species and ecosystem engineers. They build prolifically at night, carrying mud with their forepaws and timber between their teeth.
Christopher B. Anderson is an American ecologist working in southern Patagonia's Tierra del Fuego Archipelago, shared between Chile and Argentina. Anderson obtained his B.S. in biology with honors from the University of North Carolina at Chapel Hill in 1999 and his PhD in ecology from the Odum School of Ecology – University of Georgia in 2006. His research in southern Patagonia has involved social entrepreneurial efforts, as well, such as the creation of the Omora Sub-Antarctic Research Alliance (USA), a non-profit dedicated to promoting research, education and conservation in Tierra del Fuego and southern Patagonia. Anderson and his colleagues also have developed long-term socio-ecological research platforms that attempt to link long-term academic endeavors with society to demonstrate the inextricable union between conservation and social well-being. In 2005, this initiative was able to successfully apply to UNESCO to obtain the designation of the Cape Horn Biosphere Reserve.
The Environment of Argentina is characterised by high biodiversity.
Tierra del Fuego National Park is a national park on the Argentine part of the island of Tierra del Fuego, within Tierra del Fuego Province in the ecoregion of Patagonic Forest and Altos Andes, a part of the subantarctic forest. Established on 15 October 1960 under the Law 15.554 and expanded in 1966, it was the first shoreline national park to be established in Argentina.
The southern big-eared brown bat is a species of bat from the family Vespertilionidae. Although current taxonomy treats the southern big-eared brown bat as a separate species, it is often treated as a subspecies of the small big-eared brown bat. It lives in the forests of southern Argentina and Chile; though the population of the bat in the southern part of its habitat is low, there are no major concerns to justify anything lower than a Least Concern rating in the IUCN Red List.
Invasive species are a serious threat to the native biodiversity of South America and are an ongoing cost to South American agriculture. South America is an important region for the world's biodiversity, and includes a wide variety of native species, many of which provide medicinal uses. Introduced species in South America, have the potential to pose harm to ecosystems of the region and the aforementioned biodiversity. Although many of these non-native species are invasive, residents of the region often value these species, making it more difficult to organize efforts to get rid of them. Because of the instrumental and cultural value placed on these species, greater awareness, research, and policy are all necessary steps in solving invasive issues in South America. Here is a list of just a few of the species that have invaded South America and where they originate.
Promecheilidae is a family of beetles in the superfamily Tenebrionoidea. Perimylopidae is considered a synonym. They are found in southern South America and associated archipelagos like South Georgia and the Falklands, New Zealand and Tasmania. Some species are associated tree ferns and moss-covered dead wood, and other forested habitats, while others are associated with peat bogs, grasslands and coastal habitats. They are probably phytophagus, feeding on lichen, moss, and other plant material.
The beaver is a keystone species, increasing biodiversity in its territory through creation of ponds and wetlands. As wetlands are formed and riparian habitats enlarged, aquatic plants colonize newly available watery habitat. Insect, invertebrate, fish, mammal, and bird diversities are also expanded. Effects of beaver recolonization on native and non-native species in streams where they have been historically absent, particularly dryland streams, is not well-researched.
