A class presentation on tropical rain forest biome.

1. TROPICAL RAIN FOREST BIOME
Presented by :
Ashok Yadav
GGIC, M. Sc. Env. Science
http://www.goldengate.edu.np/
2068/07/20
1

2. Overview
• Distributed near equator
• Covers 2% of earth’s land surface
• Comprises about 50% - 80% of total terrestrial
species
• Uniform warm temperature and high humidity
• Heavy rainfall almost through out the year
• Sunlight and nutrients are limiting factors
2

3. Global distribution
3

4. Location
4
Amazon and Orinoco Basins in South America
and the Central American Isthmus
Congo, Niger and Zambezi Basins of Central
and Western Africa, and Madagascar; AND
The Indo-Malay, Borneo and New Guinea
Regions

5. Climatic conditions & Topography
• Rainfall: 200cm to 225cm a year round
• Temperature: ranges between 20 and 29
degrees Celsius ( 68 and 84 degrees
Fahrenheit)
• High humidity
• Soil: exceedingly thick, acidic
and low in nutrient content
5

6. Vegetation
Highly stratified with trees forming mainly 5
layers:
1)Scattered, 50-60m tall emergent trees having
shallow roots and buttresses
2)Canopy layer of 25-35m tall tree
3)Lower tree understory of 15-24m high trees
developing into canopy openings at banks of
river and streams
6

7. Contd…
4) Poorly developed shrubs and young trees in
deep shade
5) Little vegetation with broad leaves at ground
level; Abundance of lianas, vines, ferns, tree
ferns, epiphytes and others
7

8. Some vegetation found in Tropical
Rain Forest
Bougainvillea
Rafflesia
Curare
Durian
Kapok Tree
Mangrove Forests
Tualang
Bamboo
Strangler figs
Jambu
8

9. Animals
• Insects make up the largest group
• Home to some of the most beautiful birds,
Example - Over 300 different species of
parrots alone mostly residing on or in the
canopies of trees
9

10. Some animals found in Tropical Rain
Forest
• African Forest Elephant
• Chimpanzee
• Dawn Bat
• Golden Lion Tamarin
• Harpy Eagle
• Jambu Fruit Dove
• King Cobra
• Linn’s Sloth
• Orangutan
• Proboscis Monkey
• Silvery Gibbon
• Slender Loris
• Sumatran Rhinoceros
• Toco Toucan
• Vampire Bat
10

11. Some of tropical rainforest
biome
11

12. Other Information
• Contains the most diversity of species than
any other biome
• Produce about 40% of Earth’s oxygen.
• More kinds of different trees than any other
biome.
• About one quarter of the medicines used
today come from rainforest plants.
12

13. Works Cited
• “tropical rainforest.” Encyclopedia Britannica. 2009. Encyclopedia
Britannica Online School Edition. 20 Oct. 2009
• http://www.blueplanetbiomes.org/rnfrst_animal_page.htm
• http://www.blueplanetbiomes.org/rnfrst_plant_page.htm
• http://www.geocities.com/miguel_forjan/venezuela2004/Miguel_more_trop
• http://www.molon.de/galleries/Malaysia/Sarawak/Semenggoh/image
s01/02%20Tropical%20rainforest.jpg
• http://farm3.static.flickr.com/2087/2238256419_66bf0f0846.jpg
• http://michael07.files.wordpress.com/2007/10/rainforest_location_m
ap0011.gif
• http://www.samuseum.sa.gov.au/water/images/darutemp.gif
• http://www.sciencedaily.com/images/2008/12/081209125830-
large.jpg
13

14. Thank You!
14