Kelp is a large seaweed that grows in forests under the sea. Kelp forests provide food and shelter for many species of fish.
Sea urchins eat kelp. Sea otters eat sea urchins.
In some areas, people have hunted large numbers of sea otters.
Explain how hunting sea otters could affect the community in a kelp forest.
82 exam-style questions on Edexcel GCSE Biology 9.1 Ecosystems and interdependence, covering 9.1.1 Levels of organisation in ecosystems, 9.1.2 Abiotic and biotic factors, 9.1.3 Importance of interdependence, 9.1.4 Parasitism and mutualism, and 9.1.5 Determining number of organisms in an area. Each one has a worked solution and a mark scheme showing where the marks go.