Researchers studied two heathland communities of the same area. Each community contained the same shrub species. Some other species used the shrub for food or shelter.
A disease caused the population of the shrub species to decline in both communities.
| Community | Number of other species recorded | Number of these species dependent on the shrub |
|---|---|---|
| R | 40 | 6 |
| S | 20 | 8 |
Calculate the percentage of the other species that depend on the shrub in each community.
Give your answers to the nearest whole number.
Explain which community is likely to be more stable after the shrub population declines.
Use your answers from part (a).
84 exam-style questions on AQA GCSE Biology 7.3 Biodiversity and the effect of human interaction on ecosystems, covering 7.3.1 Biodiversity, 7.3.2 Waste management, 7.3.3 Land use, 7.3.4 Deforestation, 7.3.5 Global warming, and 7.3.6 Maintaining biodiversity. Each one has a worked solution and a mark scheme showing where the marks go.