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Table 8 Calculated mean percentage (%) and standard deviations (SD) of occurrence of target species, competing species and the ratio target species to competing species for semi-natural grassland, heathland and deciduous forests for the four scenarios in 2030 compared to 1990, the p value, indicating the significance level for the difference from the reference scenario (BB—2030)

From: Modelling impacts of acid deposition and groundwater level on habitat quality and plant species diversity

Scenario Target species Competing species Target/competing
  % SDa pb % SD pb pb
  Semi-natural grassland  
1990 3.93 7.1 ** 12.38 13.3 *** 0.542 ***
BB 2030 4.14 7.1 - 11.94 13.9 - 0.585 -
IB 2030 4.04 7.0 - 12.10 14.0 - 0.573 -
BI 2030 4.27 7.0 * 11.75 13.2 - 0.519 ***
II 2030 4.18 6.9 - 11.68 13.3 * 0.504 ***
  Heathland   
1990 0.67 2.2 ** 11.69 22.0 - 0.066 -
BB 2030 0.78 2.8 - 12.23 22.5 - 0.073 -
IB 2030 0.84 2.9 - 13.04 23.1 * 0.072 -
BI 2030 1.14 3.9 *** 15.33 25.5 *** 0.123 ***
II 2030 1.23 3.9 *** 16.35 26.3 *** 0.120 ***
  Deciduous forest   
1990 2.58 4.9 *** 12.87 19.0 - 0.245 ***
BB 2030 3.00 5.5 - 12.22 19.1 - 0.323 -
IB 2030 3.04 5.4 - 12.31 19.2 - 0.324 -
BI 2030 3.53 5.1 *** 14.45 20.1 *** 0.330 -
II 2030 3.59 5.2 *** 14.51 20.2 *** 0.338 -
  1. aStandard deviation
  2. b p value, indicating the significance level for the difference from the BB scenario (2030):
  3. - no difference (0.10 < p)
  4. ~ indication for a difference (0.05 < p < 0.10)
  5. *a significant difference (0.01 < p < 0.05)
  6. **a strong significant difference (0.001 < p < 0.01)
  7. ***a very strong significant difference (p < 0.001)