ENVIRONMENTAL STUDIES(ES)

ENVIRONMENTAL STUDIES

Lesson 13: Types of ecosystems

Lake ecosystem

It functions like a giant permanent pond. A large amount of its plant material is the algae, which derives energy from the sun. Microscopic animals feed on the algae. The small animals such as snails are eaten by small carnivorous fish, which in turn are preyed upon by larger carnivorous fish. Catfish feed on the detritus on the muddy bed of the lake and are called bottom feeders.