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Alice Zhang

on 17 January 2013

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Transcript of Rainforests

Rainforests What is the biotic organization like for a tropical rainforest? Toucan Elephant Jaguar Orangutan Cheetah Crocodile Iguana Capuchin Gorilla Chimpanzee Salamander Alligators Red Eyed Tree Frog Tarsier Ocelot Siamong Serval Xenops Binturong Bonobo Caiman Cassowary Chlamydosaurus Gibbon Bibliography http://www.enchantedlearning.com/subjects/rainforest/Animals.shtml
http://www.blueplanetbiomes.org/rnfrst_climate_page.htm http://www.blueplanetbiomes.org/rainforest.htm Biotic Organisations The Vegetation Rainforest plants have made many adaptations to their environment such as being able to shed water quickly so the branches or leaves don't get too heavy and break. Leaves are big so they can absorb as much energy from the sun as possible. The soil of the tropical rainforests is very poor in nutrients and minerals because of the rainfall the rain has drained out most of the nutrients and minerals in the soil. Many plants that are found can be used in foods, cosmetics, and medicines with a quarter of our medication deriving from tropical plants. 80% of the flowers in the Australian rainforests can not be found anywhere else in the world. The Animals Rainforests cover only 7% of the earth's land but half of our animals live in the rainforests. There are very rare and endangered species in the tropical rainforests. Some of the animals that are endangered are the golden lion tamarin monkey, toucans and parrots, bangel tiger and gorillas. The golden lion tamarin monkey is becoming extinct because people hunt it for their strawberry-blond fur which can be sold for twenty thousand dollars. Gorillas are going extinct because of hunters, habitat loss and disease, specifically the ebola virus. The toucans and parrots are becoming extinct because of habitat loss and being hunted down to be sold as pets. http://www.rain-tree.com/facts.htm http://www.srl.caltech.edu/personnel/krubal/rainforest/Edit560s6/www/whlayers.html
http://www.ehow.com/about_6472213_kind-emergent-layer-rain-forest_.html The Four Levels of the Rainforest Emergent Layer Canopy Layer Understory Layer Forest Floor The biotic organization splits into two parts. The first part consists of animals. Only the tallest trees reach this level they reach about 250 feet. Because of all the sunlight and stong winds that these trees get they grow thick and waxy leaves to protect them from the sun and the wind. Since the wind is so powerful it will blow the seeds from the trees so it would spread to the other parts of the rainforest. The most common trees that grow in the emergent layer are hardwood evergreen trees and the broad-leaf trees. The animals who live here are the different type of birds, butterflies and some monkeys. Bengal Bamboo Curare Coconut Tree Durian Jambu Kapok Tree Tualang Banana Tree Ferns Orchids The second part is the vegetation. The trees in this layer only reach up to 100 feet.This canopy layer is home to many animals, most of the animals are hiding from their predators and to find fruits from the trees. Most animals surprisingly don't live in the forest floor but on the canopy layer. The canopy layer is hotter and drier than most of the other layers other then the emergent layer. Since the leaves of these trees are so large they cover up most of the space at the top, they form a umbrella shape or a canopy shape which is why it's called the canopy layer. The types of animals that live here are the birds and the monkeys. The understory layer is very hot, humid and damp. The understory layer only gets about 2-5% of sunlight that the canopy gets. The vegetation in the understory layer includes shrubs, trees that are still growing, palm trees and plants that can grow in the shade. Since the plants in the understory layer don't get much sunlight the plants have adapted to growing larger leaves so they can collect as much light as possible. Many of the plants that live in this layer are found in a lot of households because they don't need much light. Some animals that can be found here are snakes, frogs, monkeys and insects. The forest floor is humid and damp. The plants who don't need much sunlight grow here, they rarely get 2% sunlight at the most because of the leaves from the canapy layer. Dead leaves, plants and animals are usually on the ground they decay very quickly and provide nutrients to the soil. A leaf that usually takes a year to decompose in a normal temperature will take about 6 weeks to decompose on the rainforest floor. Fern, moss, and mushrooms are scattered around the floor. There are also many roots on the ground, one of the biggest being the buttress root which can grow up to 15 feet long. The animals that can be found here are insects, tapirs, scorpians, tigers and jaguars. By: Alice Zhang and Jessica Minty Location Madagascar Rainforest Congo Rainforest Australasian Rainforests Amazon Rainforest Central American Rainforests South East Asian Rainforests Abiotic Features The abiotic features provides biotic organisms with the essentials to live. An example of this is a rock or log, the rocks or logs in the environment help provide a habitat for the insects that help fertalize the soil and are a source of food for plants and animals. Log/Rock Habitat for Insects Living Insects Food for Animals and Plants Fertalized Soil Climate The climate of a tropical rainforest is incredibly humid and hot all at the same time. The climate is humid because of all the rainfall, the amount of rainfall all together is about 250cm. All tropical rainforests are located near the equator. Surprisingly a lot of the rain does not touch the ground, the rain hits the emergent layer first then the canopy layer. The average temperature of a tropical rainforest is about rarely gets above 30 degrees or drops below 20 degrees.
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