Biodiversity: the variety of plants, animals, and all other life in an environment.
Photosynthesis: a set of chain reactions that convert light energy into chemical energy. Photosynthesis also produces energy-rich carbohydrates like starch. Photosynthesis occurs in the chloroplast of a plant cell... more
Toxin: a poisonous substance made by plants or animals. Snake and spider venom are a type of toxin... more
Of all the Earth’s land biomes, rainforests change the most amount of energy coming from the sunlight into food (like sugars). We call this action photosynthesis.
After plants change sunlight energy into sugars, animals can get that energy by eating the leaves, fruits, or other parts of the plants. This can be good or bad for the plants, so over many, many years, plants have come up with ways to trick animals into eating certain plant parts while avoiding others.
Plants pack their fruits with sugar, making them a sweet and tempting treat for many animals. This is because fruits also hold the seeds of a plant.
By hiding their seeds in delicious fruits, plants are tricking animals into eating them. That way, the animals spread (disperse) the seeds inside the fruits to other areas of the rainforest.
But what about the parts of a plant that need to be protected and not eaten? To fight off animals like insects that try to eat their leaves and shoots, some plants make certain chemicals called toxins. These toxins taste bad or make animals sick, so animals will not eat those parts of the plant.
What is toxic to some can be helpful to others—humans have been able to use some of the chemicals found in tropical plants as medicines. This is just one of the many reasons why we should preserve the biodiversity, or diversity of life, that the rainforests hold.
Images via Wikimedia. Rafflesia image by Henrik Ishihara.
Karla Moeller. (2013, July 24). Plants of the Rainforest. ASU - Ask A Biologist. Retrieved September 25, 2020 from https://askabiologist.asu.edu/fr/plants-rainforest
Karla Moeller. "Plants of the Rainforest". ASU - Ask A Biologist. 24 July, 2013. https://askabiologist.asu.edu/fr/plants-rainforest
Karla Moeller. "Plants of the Rainforest". ASU - Ask A Biologist. 24 Jul 2013. ASU - Ask A Biologist, Web. 25 Sep 2020. https://askabiologist.asu.edu/fr/plants-rainforest
The rainforest has some very unusual plants, like this Rafflesia. This plant parasite doesn't have roots of its own, but grows tissue in other plants to steal the nutrients it needs.