On an island, moths feed on nectar from flowering shrubs and transfer pollen between their flowers. Lizards eat the moths and use the shrubs as shelter. Fruit-eating birds feed on the shrubs and carry their seeds away from the parent plants.
A pollutant kills many of the moths.
Explain why the loss of moths may change the sizes of several populations and reduce the stability of this community.
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.