Table 2.
Ptaquiloside concentrations (µg·g−1) in bracken fronds and water samples from the drinking water abstraction sites; and total rainfall (mm) and average temperature (°C) in the twenty-four hours preceding sample collection taken from Met Eireann rainfall stations adjacent to each of the study sites.
| Site | Jun-15 | Jul-15 | Aug-15 | Sep-15 | Oct-15 | Nov-15 |
|---|---|---|---|---|---|---|
| Vegetation ptaquiloside (µg·g−1) | ||||||
| Mweelin Well | 14.1 | 33.1 | 0.27 | 0.88 | 1.34 | <0.01 |
| Dooghill | 88.4 | 52.7 | 95.1 | 30.0 | 3.33 | 0.03 |
| Doolargy | 297 | 140 | 148 | 32.0 | 27.6 | 0.01 |
| Water ptaquiloside (µg·L−1) | ||||||
| Mweelin Well | 0.00 | 0.00 | 0.00 | 0.00 | 0.57 | 0.00 |
| Dooghill | 0.00 | 0.00 | 0.00 | 1.25 | 0.67 | 0.00 |
| Doolargy | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.00 |
| Rain (mm) | ||||||
| Mweelin Well | 3.60 | 7.00 | 12.40 | 0.00 | 6.80 | 3.40 |
| Dooghill | 0.00 | 1.20 | 2.60 | 0.00 | 3.80 | 2.20 |
| Doolargy | 0.20 | 10.60 | 0.10 | 0.00 | 11.10 | 0.10 |
| Temperature (°C) | ||||||
| Mweelin Well | 16.53 | 14.23 | 14.43 | 16.23 | 13.00 | 9.85 |
| Dooghill | 17.18 | 13.75 | 13.63 | 18.15 | 12.20 | 9.85 |
| Doolargy | 23.70 | 15.30 | 13.53 | 16.13 | 12.75 | 9.85 |