Two areas of limestone grassland, P and Q, are on an island. Scientists recorded the number of species in each area.
| Group of organisms | Number of species in area P | Number of species in area Q |
|---|---|---|
| Flowering plants | 29 | 12 |
| Invertebrates | 43 | 15 |
| Birds | 10 | 4 |
One species of flowering plant begins to decline in both areas.
The population and the standard of living on the island increased over a period of 12 years. The table shows some changes during this period.
| Measurement | Start of period | End of period |
|---|---|---|
| Population of the island | 8000 | 12 000 |
| Mean mass of household waste per person in kg per year | 300 | 420 |
Using the data, explain which area of grassland is likely to remain more stable as the plant species declines.
Using the data, explain how the changes on the island could reduce biodiversity.
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.