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Copy of Rainforests
Transcript of Copy of Rainforests
Types of rainforests
Rainforest can be found all over the world
The biggest rainforests can be found in Asia, South America and Africa
- Mean monthly temperatures exceed 20°C during all months of the year.
- Average annual rainfall is more than 168 cm and can exceed 1,000 cm
- Tropical rainforests are rainforests in the tropics (close to the equator)
- mean annual temperatures are between 4°C and 20°C
- average annual rainfall is more than 140 cm
- Temperate rainforests are coniferous or broad leaf forests that occur in the temperate zone
The tallest trees are the emergent
Most of these trees are broad-leaved, hardwood evergreens.
up to 200 feet above the forest floor with trunks that measure up to 16 feet around
Sunlight is plentiful
primary layer which forms a roof
It's a maze of leaves and branches
food is abundant here for animals
sunlight is still present
The plants in this area grow to 12 feet
Little sunshine reaches this area so the plants have to grow larger leaves to reach the sunlight
there`s a large concentration of animals and insects
hardly any sun reaches the forest floor
Almost no plants grow in this area
things begin to decay quickly.
More than two thirds of world`s plant species is found in the rainforest
great supplier of oxygen and plays a huge role in gas exchanges
1 out of 4 ingredients in our medicine is from rainforest plants.
More than 50 % of our animal species are found in the rainforest
Poison Dart Frog
rain forests could completely vanish in a hundred years at the current rate of deforestation.
the timber is used for flooring, furniture and paper
deforestation drives climate change
Power plants cut and burn trees to gen.erate electricity
there are great supplies of water and idea river conditions
hydroelectric power plants floor acres of the rain forest
cattle ranching accounts for 80% of current deforestation
industry uses slash-and-burn techniques to clear ranch land.
responsible for the release of 340 million tons of carbon to the atmosphere every year
3.4% of current global emissions
Agriculturalists burn hundreds to thousands of hectares
Nutrients in the soil are quickly exhausted as there is no longer a humus layer to provide nutrients.
The soil becomes infertile and nothing will grow.
Governments and industries clear-cut forests to make way for service and transit roads.
Brazil is currently building 7,500 kilometers of new paved highways that crisscross the Amazon basin
this disrupts the natural migration of animals.
the mining of iron ore, bauxite ,oil and precious metals
the emissions of toxic substances such as mercury and oil are released into the atmosphere, the soil and ingested by animals
What Does This Mean?
Were Losing The Rainforest
Rainforest use to cover 14% of our planet, now it only covers 6%
were losing : -80 000 acres of rainforest and 135 plant, animal and insect species everyday
were destroying scientific breakthroughs: since 25% of pharmaceuticals are derived from rainforest ingredients,
were destroying one of the greatest sources of oxygen
What Can We Do?
Teach others about the importance of the environment and how to help
Restore damaged ecosystems by planting trees
Encourage people to live in a way that doesn't hurt the environment
Support companies that operate in ways that minimize damage to the environment
International conservation union
The Nature Conservancy
World Wildlife Fund for Nature
Humans need food and
Releases Greenhouse gases
Harms The Ecosystems
A Vicious Cycle
They cut down trees, for timber, cattle ranches, agriculture and mining