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Brazil- A Rainforest Biome
Transcript of Brazil- A Rainforest Biome
Abiotic Factors (3)
thin and poor in nutrients
. In some parts of the Amazon River Basin,
white, sandy soils
are found, which have evolved through erosion over hundreds of millions of years. And yet, although these soils have lost their mineral content and fertility,
rich rainforests grow on them.
Abiotic Factors (1)
average annual temperature is 27°C
(80.7°F). The range is only about 2°C, which is less than the difference between day and night teperatures (2 to 5°C). Also, temperatures rarely reach over 33°C , so although it's hot and humid throughout the year, it's not as hot as you may expect.
Abiotic Factors (2)
Between January and July the prevailing winds over the equatorial Amazon flip from blowing north to south in January to blowing south to north in July. The reversal of the winds brings moisture from the Atlantic and the Caribbean into different parts of the Amazon, shifting the rainy season back and forth between areas north of the equator and areas to the south.
By Kelly Collins
IB Environmental Systems and Societies
Brazil is located in
, and it is bordered by :
Argentina, Bolivia, Colombia, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, and Venezuela
Latitude and Longitude:
15.7833° S, 47.8667° W
In Brazil, the Ministry of the Environment works with
the Amazon, the Cerrado, the Caatinga, the Pantanal, the Atlantic Forest, the Pampa - or Southern Fields, and the Coastal.
Temperature and Precipitation
Amazonia receives about
9 feet (about 100 inches) of rain every year
. Fifty percent of this returns to the atmosphere through the foliage of trees. The Amazon rainforest is the drainage basin for the Amazon River and its many tributaries. About 1,100 tributaries, 17 of which are over 1,000 miles long, drain into this depression. Whenever rain falls in the river basin, it all drains into Amazon rainforest and into the Amazon River. The Amazon is the largest river system in the world.
Tropical rainforests experience very
make the climate feel even more humid and warm
average wind speed
above the canopy of a tropical rainforest is
10 kilometers (6.2 miles) per hour
, and very often winds will stay below 5 kilometers (3 miles) per hour.
Soil Compositon and Solar Radiation
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Przyborski, Paul. "The Amazon's Seasonal Secret : Feature Articles." The Amazon's Seasonal Secret : Feature Articles. NASA Goddard Space Flight Center, n.d. Web. 07 Nov. 2015.
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"What Are the Wind Speeds in a Tropical Rainforest?" Science. Opposing Views, 2007. Web. 08 Nov. 2015.
Gray, Irina. "Tropical Rain Forests Why We All Have A Big Stake In Them." Tropical Rain Forests, Lungs Of The Earth. Tropical Rainforest Animals, Nov. 2007. Web. 08 Nov. 2015.
"Physical Landscape." Tropical Rain Forests. Weebly, n.d. Web. 08 Nov. 2015.
Lehman-Rios, Emily, and Riley Hammond. "Limiting Factors." DISCOVER THE AMAZON RAINFOREST! Weebly, n.d. Web. 08 Nov. 2015.
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Dictionary.com. Dictionary.com, 2015. Web. 08 Nov. 2015.
Rachel. "Tropical Rainforests: Keystone Animal Species." Tropical Rainforests: Keystone Animal Species. N.p., 16 Feb. 2012. Web. 08 Nov. 2015
"Amazon Rainforest: Endangered Animals for Kids." Amazon Rainforest: Endangered Animals for Kids. Sheppard Software, n.d. Web. 08 Nov. 2015.
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contributes to the greenhouse effect, and it causes global warming. The importance of
rain forest vegetation
from this point of view is that it
helps reduce the amount of solar radiation
reflected back into the atmosphere and therefore helps keep the temperatures stable.
Abiotic Factors (4)
Dominate Geographic Features and Limiting Factors
Sunlight is a limiting abiotic factor
. This is due to a very dense canopy, sunlight is blocked from the rainforest floor making underbrush growth sparse.
Soil Nutrients is also a limiting abiotic factor
. Rainforest soil is very acidic and provides little nutrients, plants depend on the decomposition of large fallen trees.
A tropical rainforest
consists mainly of moss and other lush plantation, rocks, trees, healthy soil, and grasses.
The actual land of a rainforest is usually quite rocky, as it isn't uncommon for a rainforest to cover hills and small mountains. Even though there is a lack of light that reaches the forest floor, countless species of plants, animals, and insects continue to thrive in this biome.
Temperature never fluctuates more that 3°C, which means that although the Amazon is hot and humid, it's not as hot as we may think. Also, rainfall is greatest March, and lowest in August.
Poison arrow frog
Brazil Nut Trees
Victoria amazonica (Amazon Lily)
Phenakospermum guyanense (Bird of Paradise)
- An organism that cannot manufacture its own food and instead obtains its food and energy by taking in organic substances, usually plant or animal matter.
- An organism that manufactures its own food from inorganic substances, such as carbon dioxide and ammonia.
- organisms that break down dead or decaying organisms, and in doing so they carry out the natural process of decomposition.
Oyster Mushrooms (Fungi)
Vermilion Waxcap Mushrooms
(All images from a cited source)
- A species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.
(small rodent) Brazil nut trees depend on agouti to open their seed pods
- dispersing seeds and keeping diversity
(From cited source)
Three Toed Sloth
Golden Lion Tamarin
Poison Dart Frog
Influence of Climate on Amazonian Animals and Plants
Due to global warming, species capable of moving fast enough will likely attempt to find a more suitable environment; however, many other species will either be unable to move or will have nowhere to go. Higher temperatures are impacting temperature-dependent species like
, causing their distribution to change. Some
have already invaded higher altitude habitats, but it is expected that many will simply disappear from their current habitats.
Logging and surface wildfires
can result in an annual loss of 54 billion tons of carbon from the Brazilian Amazon, increasing greenhouse gas emissions. This is equivalent to 40% of the yearly carbon loss from deforestation -- when entire forests are chopped down.
Extensive cattle ranching accounts for 80% of current deforestation, while agriculture is largely responsible for the rest.
17 % of the Amazon forest has been lost in the last 50 years.
- Brazil holds about
one-third of the world's remaining rainforests,
including a majority of the Amazon rainforest. Terrestrially speaking, it is also the most biodiverse country on Earth, with more than 56,000 described species of plants, 1,700 species of birds, 695 amphibians, 578 mammals, and 651 reptiles.
Programs Supporting Amazon Preservation:
is a nonprofit organization founded in 1996 to protect the rainforest and advance the rights of indigenous peoples in the Amazon Basin.
- is a nonprofit organization fighting against deforestation and for biodiversity
Loss of Biodiversity
Modified global climate
Loss of water cycling
Amazon covers 2.1 million square miles of
The nine nations that have the Amazon rainforest in their borders are:
Brazil, Peru, Colombia, Venezuela, Ecuador, Bolivia, Guyana, Suriname and French Guiana.
Arapaima Fish (left)
The Amazon Rainforest's high humidity and temperatures support a diverse population of animal and plant life.