Table 50.
Overview of observed water depth (h) and water surface area (A) of the data for Spain, canton Aargau (Switzerland) and the UK
| Spain | Aargau (Switzerland) | UKa | |
|---|---|---|---|
| Number of water bodies | 794 | 729 | 259 |
| h | |||
| < 0.3 m | 18% | – | 27% |
| < 1.0 m | 70% | – | 42% |
| A | |||
| < 100 m2 | 59% | 52% | 23% |
| < 900 m2 | 87% | 89% | 79% |
a
No ponds of less than 25 m2 (although widely present in the UK landscape) or more than 2 ha. The presence of amphibians recorded at 19% (49/259) of the ponds, but is probably underestimated and has no bias versus water surface area (Figure 52A).