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The Amazon Rainforest
Transcript of The Amazon Rainforest
The Amazon Rainforest
The Amazon Rainforest is located in South America
Spreads across Colombia, Ecuador, Peru, Venezuela, Bolivia, and Brazil
In an average year, it is very humid because of all the rainfall.
Tropical Rainforests get about 150 cm of rain a year
Cooler air is less able to hold moisture, so water condenses into raindrops and the equatorial regions receive high levels of precipitation, resulting int the development of tropical rainforests
It rains about 1/8 inch everyday
Amount of water and sunlight, climate weather, and precipitation are all abiotic factors
These affect the trees and animals that live there
These factors are important because without the right amount of water and sunlight, plants would die
Three Toed Sloth
By Kayley Baton
The Top Carnivore and Its Niche
The Jaguar is the top carnivore
They hunt a ride range of prey
They spend a lot of time in trees, often attacking prey from the branches
They hunt peccaries, capybaras, crocodiles, tapirs, fish, monkeys, sloths, turtles and birds
Brazil nut trees (Bertholletia excelsa) which are large canopy trees, depend on the agouti, ground-dwelling rodent, for a key part of their life cycle.
The agouti is the only animal with teeth strong enough to open their grapefruit-sized seed pods. While the agouti eats some of the Brazil nut's seeds, it also scatters the seeds across the forest by burying caches far away from the parent tree. These seeds then germinate and form the next generation of trees.
This is an example of mutualism
For pollination, Brazil nut trees are dependent on Euglossine orchid bees.
Without these large-bodied bees, Brazil nut reproduction is not possible.
This is an example of mutualism
Monkeys and apes have adapted because they all have long arms to use the canopy to swing through the trees, avoiding ground predators.
The South American jaguar has developed the ability to swim well in its wet rainforest home. Adaptations of this sort allow the jaguar to find food not only on the ground but in the plentiful rivers and streams of the Amazon
The little aye-aye, a small Madagascan primate, has evolved to be a nocturnal feeder in order to escape the clutches of predators in the daylight. Its large eyes allow more light in at night, and it also uses echolocation to find its prey in the dark.
the Amazon Horned Frog has developed a body that convincingly mimics "leaf litter." The frog uses its brown-green, leafy-looking body to lie amongst piles of dry leaves and ambush its prey
The aye-aye's oddly elongated middle finger evolved to scoop insects from small holes in tree bark where shorter fingers could not reach.
WHY ARE RAINFORESTS IMPORTANT?
They provide a habitat for plants and animals
Rainforests store a lot of water. In fact, it is believed that the Amazonian forests alone store over half of the Earth's rainwater. Rainforest trees draw water from the forest floor and release it back in to the atmosphere in the form of swirling mists and clouds.
Without rainforests continually recycling huge quantities of water, feeding the rivers, lakes and irrigation systems, droughts would become more common, potentially leading to widespread famine and disease.
we depend on trees to cleanse our atmosphere. They absorb the carbon dioxide that we exhale, and provide the oxygen we need to breathe. When rainforest trees are burnt they release carbon dioxide, which pollutes the atmosphere and contributes to global warming.
Many foods we consume today such as nuts, bananas, coffee and spices, and industrial products such as rubber, resins and fibers, were originally found in tropical rainforests.
Positive Effects of Humans
There are government groups that support the rainforest and discourage the deforestation. Many people have joined or supported projects such as WWF to help save the Amazon rainforest, the animals in it, and their habitat.
Negative Effects Of Humans
Rainforests used to cover 14% of the Earth, and now we only have 6% left.
Currently, the world is losing 137 species a day due to deforestation
When plants are removed, soil erosion occurs. Rain washes away nutrients in the soil.
The tropical rainforest climate will be disrupted because it will turn into a hot and dry area. This poses a hazard to the native species. Carbon dioxide is also released into the atmosphere, which is already a problem.
Layers of the Rainforest
There are four very distinct layers of trees in a tropical rain forest- the emergent, upper canopy, understory, and forest floor.
Emergent trees are spaced wide apart, and are 100 to 240 feet tall with umbrella-shaped canopies that grow above the forest.
The upper canopy of 60 to 130 foot trees allows light to be easily available at the top of this layer, but greatly reduced any light below it. Most of the rain forest's animals live in the upper canopy.
The understory, or lower canopy, consists of 60 foot trees. This layer is made up of the trunks of canopy trees, shrubs, plants and small trees.
The forest floor is usually completely shaded, except where a canopy tree has fallen and created an opening. Most areas of the forest floor receive so little light that few bushes or herbs can grow there. As a result, a person can easily walk through most parts of a tropical rain forest.
The animals have adapted to survive on specific types of food to lessen the competition for scarce resources.
Although all these species survive on similar diets, resource partitioning minimizes competition between two species by ensuring a preference for a certain type of food.
Plants compete over sunlight, bigger trees create shade on the ground
How Can People Help The Rainforests?
You can teach other people about how they can help save the tropical rainforests
Grow trees where forests have been cut down
Take part in organizations that help wildlife and tropical rainforests