AQA GCSE Combined Science Trilogy · 8464
Specification 4.7.3.6 · Paper 2
Revise: Maintaining Ecosystems and BiodiversityLeaving field margins allows wild flowers and grasses to grow beside the crop. Reintroducing hedgerows adds shrubs and other vegetation. These areas provide food, shelter and places to reproduce for a wider range of organisms, including insects and birds.