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Samuel Hydroelectric Dam
The Samuel Hydroelectric Dam ( pt, Usina Hidrelétrica Samuel) is a 216 MW hydroelectric dam near Porto Velho, Rondônia, Brazil. The project was controversial since it had a major environmental impact and during operations released more greenhouse gases than a comparable oil-fuelled plant. Reservoir The Samuel dam impounds the Jamari River, a right tributary of the Madeira River. It is about from Porto Velho. The Jamari River originates in the Pacaás Novos Mountains to the south at an altitude of about . The catchment area is just , or 24 times the area of the reservoir. The river delivers an annual flow of per second. The dam contains a volume of and covers at normal maximum level of above sea level. The main reservoir is long by wide, and extends further to the south for another with a width of . Since the terrain is relatively flat, of dikes were built along the right and left banks to hold the water. Construction Construction began towards the end of a period ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rondônia
Rondônia () is one of the 26 states of Brazil, located in the northern subdivision of the country (central-western part). To the west is a short border with the state of Acre, to the north is the state of Amazonas, in the east is Mato Grosso, and in the south and southwest is Bolivia. Rondônia has a population of 1,815,000 as of 2021. It is the fifth least populated state. Its capital and largest city is Porto Velho. The state was named after Cândido Rondon, who explored the north of the country during the 1910s. The state, which is home to 0.8% of the Brazilian population, is responsible for 0.6% of the Brazilian GDP. Geography Rondonia was originally home to over 200,000 km2 of rainforest, but has become one of the most deforested places in the Amazon. By 2003 around 70,000 km2 of rainforest had been cleared. The area around the Guaporé River is part of the Beni savanna ecoregion. The Samuel Dam is located in the state, on the Jamari River. History ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pimenta Bueno
Pimenta Bueno is a municipality located in the Brazilian state of Rondônia Rondônia () is one of the 26 states of Brazil, located in the northern subdivision of the country (central-western part). To the west is a short border with the state of Acre, to the north is the state of Amazonas, in the east is Mato Grosso .... Its population was 36,881 (2020) and its area is 6,241 km². The municipality contained the Rio Roosevelt State Forest, created in 1990 and cancelled in 2010.* The city is served by Pimenta Bueno Airport. References Municipalities in Rondônia {{Rondônia-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serrasalmus Rhombeus
The redeye piranha (''Serrasalmus rhombeus''), also known as the black piranha, white piranha, spotted piranha or yellow piranha, is a species of freshwater ray-finned fish, a piranha from the family Serrasalmidae. It is found in northern South America. It is the type species of the genus '' Serrasalmus''. Description The redeye piranha is one of the larger species of piranha. It has a distinctively, rhombus-shaped body, solidly coloured from grey through to nearly black. Whatever the body colour, this species has red eyes. The colour of juveniles can be more mottled than in adults. As they mature their silvery body becomes less mottled and changes to a darker grey or black colour. How dark the fish become depends on the local water conditions; fish in Peru appear to be the darkest and may be almost jet black. The maximum recorded fish measurement standard length is , although a more normal length is around , and they attain a maximum weight of . Distribution The redeye piranha is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypophthalmus Marginatus
''Hypophthalmus marginatus'', commonly called the Mapará, is a species of demersal potamodromous catfish of the family Pimelodidae The Pimelodidae, commonly known as the long-whiskered catfishes, are a family of catfishes ( order Siluriformes). Taxonomy The family Pimelodidae has undergone much revision. Currently, it contains about 30 genera and about 90 recognized and kno ... that is native to Amazon and Orinoco River basins of Brazil, Peru and major rivers of French Guiana and Suriname. Description It grows to a length of 55.0 cm. Caudal fin deeply forked with black tips. Body silvery. Barbels are grey to black. Ecology A parasite of the esophageal musculature, '' Kudoa amazonica'' was found from the fish. References External linksReproductive cycle of the Amazonian planktivorous catfish Hypophthalmus marginatus (Siluriformes, Pimelodidae) [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schizodon Fasciatus
''Schizodon fasciatus'' is a fish in the family Anostomidae. Description Max length : 40.0 cm TL male/unsexed. Distribution South America: upper Amazon River and French Guiana coastal basins. References Anostomidae Taxa named by Johann Baptist von Spix Taxa_named_by_Louis_Agassiz Fish described in 1829 {{characiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cichla
Peacock bass or Brazilian tucunaré are large freshwater cichlids of the genus ''Cichla''. These are diurnal predatory fishes native to the Amazon and Orinoco basins, as well as rivers of the Guianas, in tropical South America. They are sometimes referred to in English by their Brazilian name ''tucunaré'' or their Spanish name ''pavon''. Despite the common name and their superficial similarity, they are not closely related to other fish known as bass, such as the North American largemouth bass (''Micropterus salmoides''). Peacock bass are important food fish and also considered valuable game fish. This has resulted in their accidental (escapees from fish farms) or deliberate (release by fishers) introduction to regions outside their native range, both elsewhere in South America, and in warm parts of North America and Asia. Singles have been caught elsewhere, including Australia, but do not appear to have become established there. Where established as an introduced species, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methylate
In the chemical sciences, methylation denotes the addition of a methyl group on a substrate, or the substitution of an atom (or group) by a methyl group. Methylation is a form of alkylation, with a methyl group replacing a hydrogen atom. These terms are commonly used in chemistry, biochemistry, soil science, and the biological sciences. In biological systems, methylation is catalyzed by enzymes; such methylation can be involved in modification of heavy metals, regulation of gene expression, regulation of protein function, and RNA processing. In vitro methylation of tissue samples is also one method for reducing certain histological staining artifacts. The reverse of methylation is demethylation. In biology In biological systems, methylation is accomplished by enzymes. Methylation can modify heavy metals, regulate gene expression, RNA processing and protein function. It has been recognized as a key process underlying epigenetics. Methanogenesis Methanogenesis, the process that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amazon Basin
The Amazon basin is the part of South America drained by the Amazon River and its tributaries. The Amazon drainage basin covers an area of about , or about 35.5 percent of the South American continent. It is located in the countries of Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, Suriname, and Venezuela. Most of the basin is covered by the Amazon rainforest, also known as Amazonia. With a area of dense tropical forest, this is the largest rainforest in the world. Geography The Amazon River begins in the Andes Mountains at the west of the basin with its main tributary the Marañón River and Apurimac River in Peru. The highest point in the watershed of the Amazon is the second biggest peak of Yerupajá at . With a length of about before it drains into the Atlantic Ocean, it is one of the two longest rivers in the world. A team of scientists has claimed that the Amazon is longer than the Nile, but debate about its exact length continues. The Amazon sys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samuel Ecological Station
The Samuel Ecological Station ( pt, Estação Ecológica Samuel) is a strictly protected ecological station in the state of Rondônia, Brazil. It contains a tract of Amazon rainforest that extends east from the reservoir formed by the Samuel Hydroelectric Dam. Location The Samuel State Ecological Station is in the northern portion of the state of Rondonia. It covers part of the Jamari River basin and a large part of the reservoir of the Samuel Hydroelectric Dam. The conservation unit extends the east from this reservoir. It is bounded to the north by the Jequitibá Forestry Settlement Project (''Projeto de Assentamento Florestal''), to the north and east by the Jacundá National Forest and to the south by the Jamari National Forest. The unit lies in the municipalities of Candeias do Jamari (76%} and Itapuã do Oeste (24%). Environment The Samuel State Ecological Station lies in the lower plateau of the western Amazonia, with altitudes from above sea level. The conservatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mato Grosso
Mato Grosso ( – lit. "Thick Bush") is one of the states of Brazil, the third largest by area, located in the Central-West region. The state has 1.66% of the Brazilian population and is responsible for 1.9% of the Brazilian GDP. Neighboring states (from west clockwise) are: Rondônia, Amazonas, Pará, Tocantins, Goiás and Mato Grosso do Sul. The state is roughly 82.2% of the size of its southwest neighbor, the nation of Bolivia. A state with a flat landscape that alternates between vast '' chapadas'' and plain areas, Mato Grosso contains three main ecosystems: the Cerrado, the Pantanal and the Amazon rainforest. The Chapada dos Guimarães National Park, with caves, grottoes, tracks, and waterfalls, is one of its tourist attractions. The extreme northwest of the state has a small part of the Amazonian forest. The Xingu Indigenous Park and the Araguaia River are in Mato Grosso. Farther south, the Pantanal, the world's largest wetland, is the habitat for nearly one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acre (state)
Acre () is a state located in the west of the North Region of Brazil and the Amazonia Legal. Located in the westernmost part of the country, at a two-hour time difference from Brasília, Acre is bordered clockwise by the Brazilian states of Amazonas and Rondônia to the north and east, the Bolivian department of Pando to the southeast, and the Peruvian regions of Madre de Dios, Ucayali and Loreto to the south and west. The state, which has 0.42% of the Brazilian population, generates 0.2% of the Brazilian GDP. Its capital and largest city is Rio Branco. Other important places include Cruzeiro do Sul, Sena Madureira, Tarauacá and Feijó. Intense extractive activity in the rubber industry, which reached its height in the early 20th century, attracted Brazilians from many regions to the state. From the mixture of sulista, southeastern Brazil, nordestino, and indigenous traditions arose a diverse cuisine. It combines sun-dried meat ( carne-de-sol) with pirarucu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rio Branco, Acre
Rio Branco (, ''White River'') is a Brazilian municipality, capital of the state of Acre. Located in the valley of the Acre River in northern Brazil, it is the most populous municipality in the state, with 413,418 inhabitants, according to the 2018 census, almost half the state population. Rio Branco was one of the first settlements to develop in the region, being the westernmost major settlement in the country and the 4th-oldest state capital city in Northern Brazil, after Belém, Manaus and Macapá. In 1913, it became a county. In 1920, it became the capital of the territory of Acre, and in 1962, the state capital. It is the administrative center for the economic, political and cultural region. History The capital of the state of Acre developed from the rubber plantation founded on December 28, 1882, by migrant settlers from the Northeastern Region of Brazil. Then called Seringal Volta da Empresa, it was located on the right bank of the Acre river. The Gameleira ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
