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Tropical Evergreen Forest Ecosystem
Transcript of Tropical Evergreen Forest Ecosystem
These areas usually receive more than 200 cm of rainfall a year and have a temperature of 15 to 30 degrees Celsius. In other words it is hot and humid throughout the whole year.
The trees are evergreen because there is never a period of drought.
Daytime temperatures are around 30ºC - 35ºC, and night-time temperatures around 20ºC - 25ºC, with little difference between the seasons.
Tropical Rainforest are thought to be the oldest biome on earth, therefore it is not surprising that they contain the highest diversity of species.
They cover only 2% of earths surface yet contain an estimated 50% of all life on earths land masses.
Tropical Rainforest can be found all over the world inlucding places such as South America, Australia, Southeast Asia, and West Africa.
Rainforests are the undisputed champions of biodiversity among the world's ecosystems, containing far higher numbers of species on a per-area basis relative to sub-tropical, temperate, and boreal ecosystems.
A single bush in the Amazon may have more species of ants than the entire British Isles. This diversity of rainforests is not a random event, but is the result of a series of unique circumstances.
More than two thirds of the world's plant species are found in the tropical rainforests: plants that provide shelter and food for rainforest animals as well as taking part in the gas exchanges which provide much of the world's oxygen supply.
Rainforest plants live in a warm humid environment that allows an enormous variation rare in more temperate climates: some like the orchids have beautiful flowers adapted to attract the profusion of forest insects.
Competition at ground level for light and food has lead to evolution of plants which live on the branches of other plants, or even strangle large trees to fight for survival.
The aerial plants often gather nourishment from the air itself using so-called 'air roots';. The humidity of the rainforest encourages such adaptations which would be impossible in most temperate forests with their much drier conditions.
some types of rainforest plants include: epiphytes, Buttress Roots, orchids, carnivorous plants, and Saprophytes.
The animal of the tropical rainforest are a wide variety that adapt to their surroundings in many ways. One of the most common and effective camouflage is looking like a leaf dead or alive. The rainforest floor is scattered with dead leaves so the animals blend in very well and would be very hard to see from above like a bird would. Moths, treefrogs, and katydids also use this method. Animals also use coloring to warn predators that they are poisonous. Some of the brightly colored animals are just bluffing, but one that definately isn't is the poison arrow frog. The poison arrow frog comes in many different colors, the retiulated; dendrobates auratus is an aqua and black colored poison arrow frog. The D. leucomelas is a bright yellow and black colored poison arrow frog. The D. granuliferus' top half is red, its underside and back legs are green. The poison arrow frogs get their name because some rainforest tribes use the secretions from their skin to poison the tips of their blow gun darts.
Rainforests are dissappearing at about 80 acres per minute, day and night. The rainforest is home to over half of all of the species known in the world. There are many undiscovered species that are being destroyed. Many of these species are possible cures for cancer and AIDS etc. Much of the destruction is done by Forest Alliance of British Columbia. Also as the population of earth grows, the need for forest products is increased and causes them to destroy even more rainforests to meet the demands. If this destruction continues, major climatic changes will occur. This will happen because when the forests are destroyed carbon dioxide is released which, in turn, causes the greenhouse affect. Ranching and logging for materials for houses, furniture, and paper products are also major destroyers of the rainforest. The tropical rainforest once covered more than 16% of the earth's total land surface, but now covers less than 2% of the earth's total land surface. Boycotts are the most effective ways of stopping destruction of the rainforest. Boycotting fast food resturaunts who use hamburger from cows who grazed on rainforest land, for example. Tourism also adds to the prevention. People seeing how the forest looks and all of the living going on in it causes them to want to make changes so that the rainforest can continue to grow. .
By: Brandon Boyer
Tropical Forest Ecosystem