Scientists counted a species of woodlouse in leaf litter at four distances from a pond, before and after three dry summers.
| Distance from the pond in m | Water content of leaf litter before the dry summers in % | Woodlice before the dry summers per m² | Water content of leaf litter after the dry summers in % | Woodlice after the dry summers per m² |
|---|---|---|---|---|
| 10 | 42 | 48 | 30 | 36 |
| 30 | 35 | 39 | 23 | 21 |
| 50 | 27 | 26 | 16 | 7 |
| 70 | 21 | 14 | 10 | 0 |
Suggest how the dry summers changed the distribution of the woodlice. Predict how their distribution might change if the dry conditions continue.
Give one geographic change that could affect where this species of woodlouse is found.
83 exam-style questions on AQA GCSE Biology 7.2 Organisation of an ecosystem, covering 7.2.1 Levels of organisation, 7.2.2 How materials are cycled, 7.2.3 Decomposition, and 7.2.4 Impact of environmental change (HT only). Each one has a worked solution and a mark scheme showing where the marks go.