Table 1 Percentages and total number of sampled trees per vigour class at each site.

From: Groundwater extraction reduces tree vitality, growth and xylem hydraulic capacity in Quercus robur during and after drought events

Site

Healthy

Declining

Total number of trees per site type

Vigour class 0

Vigour class 1

Vigour class 2

Vigour class 3

Extraction

17.1%

31.7%

27.5%

23.7%

240

No extraction

27.9%

42.1%

20.7%

9.3%

140

Upland

28.8%

44.3%

22.8%

4.0%

149

Totals

123

201

129

76

529