Tropical rainforests support the greatest diversity of living organisms on Earth. Although they cover less than 2 percent of Earth’s surface, rainforests house more than 50 percent of the plants and animals on Earth.

Here are some examples of the richness of rainforests:

  • Rainforests have 170,000 of the world’s 250,000 known plant species.
  • the United States has 81 species of frogs, while Madagascar, which is smaller than Texas, may have 500 species.
  • An area of rainforest the size of two football fields (one hectare) may have more than 400 species of trees, while an equal area of forest in the United States may have fewer than 20.
  • Europe has 570 butterfly species, while Manu National Park, a single reserve in Peru, has 1,300 species.
Rainforests have an abundance of plants and animals for the following reasons:
  • Climate: because rainforests are located in tropical regions, they receive a lot of sunlight. The sunlight is converted to energy by plants through the process of photosynthesis. Since there is a lot of sunlight, there is a lot of energy in the rainforest. This energy is stored in plant vegetation, which is eaten by animals. The abundance of energy supports an abundance of plant and animal species.
  • Canopy: the canopy structure of the rainforest provides an abundance of places for plants to grow and animals to live. The canopy offers sources of food, shelter, and hiding places, providing for interaction between different species. For example, there are plants in the canopy called bromeliads that store water in their leaves. Frogs and other animals use these pockets of water for hunting and laying their eggs.

It is important to note that many species in the rainforest, especially insects and fungi, have not even been discovered yet by scientists. Every year new species of mammals, birds, frogs, and reptiles are found in rainforests.

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FAQs

  • May I use graphics from mongabay.com for my projects? Yes, you may provided that you don't remove the mongabay label from the images. You may use information from the site for class projects and can cite mongabay as the source.
  • Is this web site credible? Mongabay is the world's most popular source for information on tropical forests. The site is highly acclaimed by a number of the world's leading tropical scientists. Mongabay Founder Rhett Butler has published several scientific papers.
  • Can I interview the founder of mongabay for my school project? Unfortunately Rhett is not available for interviews. However he has answered some common questions on the Rainforest Interview page.
  • Do you have any games or activities? Currently there are a few on the resources page.
  • How can I help save rainforests? Some ideas are listed at Rainforest Solutions.
  • Where can I learn more about rainforests? Check the main rainforest site.