HISTORY OF THE AMAZON RAINFOREST

At one time Amazon River flowed westward, perhaps as part of a proto-Congo river system from the interior of present day Africa when the continents were joined as part of Gondwana. Fifteen million years ago, the Andes were formed by the collision of the South American plate with the Nazca plate. The rise of the Andes and the linkage of the Brazilian and Guyana bedrock shields, blocked the river and caused the Amazon to become a vast inland sea. Gradually this inland sea became a massive swampy, freshwater lake and the marine inhabitants adapted to life in freshwater. For example, over 20 species of stingray, most closely related to those found in the Pacific Ocean, can be found today in the freshwaters of the Amazon.

Biodiversity, flora and fauna

As the largest tract of tropical rainforest in the Americas, the Amazonian rainforests have unparalleled biodiversity. One in ten known species in the world lives in the Amazon rainforest. This constitutes the largest collection of living plants and aminal species in the world.The region is home to about 2.5 million insect species, tens of thousands of plants, and some 2,000 birds and mammals. To date, at least 40,000 plant species, 2,200 fishes, 1,294 birds, 427 mammals, 428 amphibians, and 378 reptiles have been scientifically classified in the region. One in five of all bird species are found in the Amazon rainforest, and one in five of the fish species live in Amazonian rivers and streams. Scientists have described between 96,660 and 128,843 invertebrate species in Brazil alone. The biodiversity of plant species is the highest on Earth with one 2001 study finding a quarter square kilometer (62 acres) of Ecuadorian rainforest supports more than 1,100 tree species. A study in 1999 found one square kilometer (247 acres) of Amazon rainforest can contain about 90,790 tonnes of living plants. The average plant biomass is estimated at 356 ± 47 tonnes per hectare. To date, an estimated 438,000 species of plants of economic and social interest have been registered in the region with many more remaining to be discovered or catalogued. The total number of tree species in the region is estimated at 16,000.The green leaf area of plants and trees in the rainforest varies by about 25% as a result of seasonal changes. Leaves expand during the dry season when sunlight is at a maximum, then undergo abscission in the cloudy wet season. These changes provide a balance of carbon between photosynthesis and respiration.

Scarlet macaw

The scarlet macaw (Ara macao) is a large red, yellow, and blue Central and South American parrot, a member of a large group of Neotropical parrots called macaws. It is native to humid evergreen forests of the Neotropics. Its range extends from south-eastern Mexico to Peru, Ecuador , Colombia, Bolivia, Venezuela and Brazil in lowlands of 500 m (1,600 ft) (at least formerly) up to 1,000 m (3,300 ft), the Caribbean island of Trinidad, as well as the Pacific island of Coiba. Formerly, it ranged north to southern Tamaulipas.

Phyllomedusa bicolor

Phyllomedusa bicolor, the giant leaf frog, bicolor tree-frog, giant monkey frog, or waxy-monkey treefrog, is a species of leaf frog. It can be found in the Amazon basin of Brazil, Colombia, Bolivia, and Peru, and can also be found in the Guianan Region of Venezuela and the Guianas, and in Cerrado of the state of Maranhão in Brazil.
The giant leaf frog is a nocturnal, arboreal frog. Males call from trees in tropical humid forests. Males fight each other for mating rights by using their heads to attempt to separate another male who is attached to a female. Males fend off rivals using a series of aggressive calls and use their hind legs to push away the rival.[4] During mating season, males may be targeted more by predators as the fights between males are very vocal and can be easily heard by predators.

People in the Amazon Rainforest

Today, despite the population decimation, natives peoples still live in American rainforests, although virtually all have been affected by the outside world. Instead of wearing traditional garb of loin cloths, most Amerindians wear western clothes, and many use metal pots, pans, and utensils for everyday life. Some groups make handicrafts to sell to tourists, while others make routine trips to the city to bring foods and wares to market.Almost no native group obtains the majority of its food by traditional nomadic hunting and gathering. Nearly all cultivate crops, with hunting, gathering, and fishing serving as a secondary or supplementary food source. Usually a family has two gardens: a small house garden with a variety of plants, and a larger plantation which may be one hectare in area planted with bananas, manioc, or rice. These plantations are created through the traditional practice of slash and burn, a method of forest clearing that is not all that damaging to the forest if conducted in the traditional manner.

Amazon ​Climate and seasons

The Amazon River basin has a low-water season (known popularly as summer), and a wet season (known popularly as winter) during which, the rivers flood the adjacent, low-lying forests. The climates of the basin is generally hot  and humid. In some areas, however, the summer months (June–September) can bring cold snaps, fueled by Antarctic winds traveling along the adjacent mountain range. The average annual temperature is around 25-degree and 28 degree Celsius with little to no distinction between summer and winter season.the rainforest experiences fairly hot temperatures of 26-30oC throughout the year. This is attributed to the imaginary Equator line, which influences a consistency in the day-long with 12 hours of sunlight all year round. Consequently, there is a constant supply of sunlight, which is a key component in photosynthesis powering up the rainforest all year round.

Website Templates

created with

Website Builder Software .