Rio delle amazzoni wikipedia

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Casiquiare

rio delle amazzoni wikipedia

The Amazon River in South America is the largest river by discharge volume of water in the It later became known as Rio Amazonas in Spanish and Portuguese, and Amazon River in English. The name Rio Amazonas was given after native.

2017   streaming    terremoto umbria ultime scosse

It rises in Colombia [2] and flows eastward through Brazil to join the Amazon River. It is navigable by small boats in Brazil. Jules Crevaux , who descended it, described it as full of obstacles to navigation, the current very strong and the stream frequently interrupted by rapids and cataracts. In , the Brazilian government made a somewhat careful examination of the Brazilian part of the river, as far up as the rapid of Cupati. The river serves as a principal means of transportation, being plied by tiny dugout canoes , larger ones, motorboats , and riverboats known locally as lanchas.

The portion of the river's drainage basin in Brazil alone is larger than any other river's basin. The Amazon enters Brazil with only one-fifth of the flow it finally discharges into the Atlantic Ocean , yet already has a greater flow at this point than the discharge of any other river. The name Rio Amazonas was given after native warriors attacked a 16th-century expedition by Francisco de Orellana. The warriors were led by women, reminding de Orellana of the Amazon warriors , a tribe of women warriors related to Iranian Scythians and Sarmatians [17] [18] mentioned in Greek mythology. During what many archaeologists call the formative stage , Amazonian societies were deeply involved in the emergence of South America's highland agrarian systems. The trade with Andean civilisations in the terrains of the headwaters in the Andes, formed an essential contribution to the social and religious development of the higher altitude civilisations of among others the Muisca and Incas.

As such, it forms a unique natural canal between the Orinoco and Amazon river systems. It is the world's largest river of the kind that links two major river systems, a so-called bifurcation. The area forms a water divide , more dramatically at regional flood stage. In a Jesuit priest named Father Roman, while ascending the Orinoco River , met some Portuguese slave-traders from the settlements on the Rio Negro. He accompanied them on their return, by way of the Casiquiare canal, and afterwards retraced his route to the Orinoco. During a 25 expedition, Alexander H.

Dopo la formazione dell' istmo di Panama alla fine del Terziario circa 2,5 milioni di anni fa, nel Pliocene , i Canidi migrarono dal Nordamerica verso il continente meridionale durante il cosiddetto grande scambio americano. Gli antenati dell'atelocino si adattarono a vivere nelle foreste pluviali tropicali, sviluppando gli aspetti morfologici e anatomici necessari. Ne vengono riconosciute due sottospecie [1] :. Probabilmente a causa delle abitudini acquatiche, l'atelocino ha sviluppato degli abbozzi di membrane interdigitali [5]. Rispetto ad altre specie di volpi sudamericane ad essa imparentate, l'atelocino ha dimensioni maggiori.

La fauna della foresta amazzonica comprende circa 1. Circa un quinto di tutte le specie di uccelli esistenti al mondo vivono in Amazzonia centrale. Si possono incontrare specie come l'ara aliblu Primolius maracana , il conuro del sole Aratinga solstitialis , l'ara giacinto Anodorhynchus hyacinthinus e l'ara panciarossa Orthopsittaca manilata. Fino a qualche tempo fa si poteva avvistare pure l'ara di Spix Cyanopsitta spixii , ora ritenuta estinta in natura. Curiosamente, molte delle specie citate compiono ogni qualche giorno una particolare migrazione, dalla foresta a dei giacimenti di argilla. Altri uccelli piuttosto comuni e molto conosciuti sono i tucani : particolarmente il tucano toco Ramphastos toco e quello solforato o carenato Ramphastos sulfuratus , dal becco multicolore.

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Trichechus inunguis

Rio Culuene

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Casiquiare canal

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2 thoughts on “Rio delle amazzoni wikipedia

  1. La fauna della foresta amazzonica comprende circa specie di uccelli, di rettili di .. Oltre alle lontre giganti precedentemente citate, il rio delle Amazzoni ospita 2 specie di mammiferi da fiume: uno e il lamantino delle Amazzoni.

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