Table 5.
Coverage, mean ensemble deposition, attributed critical load and its exceedances (considering the mean and the mean plus or minus the standard deviation of the ensemble deposition) for the main terrestrial habitat classes within the Natura 2000 network.
| Habitat group | EUNIS code | Habitat class | Natura 2000a | Receptorsb | Avg. dep (kgN ha−1)c | CL (kgN ha−1)d | CLexce | Clexc (Dep.-SD)f | Clexc (Dep. + SD)f |
|---|---|---|---|---|---|---|---|---|---|
| Peatlands | D1 | Raised and blanket bogs | 1.9% | 2.9% | 5.98 | 7.50 | 24% | 13% | 37% |
| D2 | Valley mires, poor fens and transition mires | 0.2% | 0.1 % | 6.94 | 12.50 | 11 % | 7% | 16% | |
| D3 | Aapa, palsa and polygon mires | 2.1% | 1.1 % | 1.49 | |||||
| D4 | Base-rich fens and calcareous spring mires | 0.1% | 0.1 % | 9.02 | 21.25 | 1 % | 0% | 2% | |
| D5 | Sedge and reedbeds | 0.5% | 0.3% | 8.05 | |||||
| D6 | Inland saline and brackish marshes and reedbeds | <0.1% | <0.1 % | 11.34 | |||||
|
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| Grasslands | El | Dry grasslands | 0.5% | 0.1 % | 5.41 | 15.75 | 0% | 0% | 0% |
| E2 | Mesic grasslands | 14.1% | 9.8% | 9.02 | 20.00 | 2% | 1% | 3% | |
| E3 | Seasonally wet and wet grasslands | 1.8% | 0.8% | 8.83 | 16.25 | 5% | 2% | 10% | |
| E4 | Alpine and subalpine grasslands | 1.3% | 1.3% | 8.40 | 7.50 | 65% | 15% | 85% | |
| E6 | Inland salt steppes | 0.5% | 0.1 % | 7.60 | |||||
| E7 | Sparsely wooded grasslands | 1.3% | 0.4% | 5.24 | |||||
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| Shrublands | F2 | Arctic, alpine and subalpine scrub | 2.7% | 3.9% | 5.07 | 10.00 | 16% | 5% | 32% |
| F3 | Temperate and Mediterranean-montane scrub | 3.6% | 3.1 % | 4.25 | |||||
| F4 | Temperate shrub heathland | <0.1% | <0.1 % | 4.67 | 15.00 | 0% | 0% | 1 % | |
| F5 | Arborescent and thermo-Mediterranean brushes | 2.7% | 2.4% | 6.11 | 25.00 | 0% | 0% | 0% | |
| F6 | Garrigue | 0.6% | 1.1 % | 6.39 | |||||
| F7 | Spiny Mediterranean heaths | 1.1% | 1.1 % | 5.72 | |||||
| F8 | Thermo-Atlantic xerophytic scrub | 0.3% | 0.0% | nd | |||||
| F9 | Riverine and fen scrubs | <0.1% | <0.1 % | 4.15 | |||||
| FB | Shrub plantations | 0.8% | 0.3% | 7.63 | |||||
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| Woodlands | G1 | Broadleaved deciduous woodland | 25.1% | 23.4% | 8.50 | 15.00 | 4% | 1% | 14% |
| G2 | Broadleaved evergreen woodland | 1.2% | 0.4% | 6.88 | 15.00 | 0% | 0% | 5% | |
| G3 | Coniferous woodland | 20.7 % | 25.6 % | 7.83 | 10.00 | 34% | 14% | 53% | |
| G4 | Mixed deciduous and coniferous woodland | 9.4% | 14.2% | 8.61 | 10.75 | 32% | 13% | 58% | |
| G5 | Early-stage woodland and seminatural stands | 7.6% | 7.5% | 6.16 | 7.50 | ||||
Representation within the Natura 2000 network;
representation within the Natura 2000 network in the joint of the buffered areas;
weighted mean of N deposition for each habitat class according to ensemble results;
attributed critical load in this work (based on empirical critical loads from Bobbink and Hetteling, 2011);
area experiencing an exceedance of the CL, expressed as percentage of the total area evaluated for each particular habitat class;
area experiencing an exceedance of the CL when using an ensemble deposition value of the mean plus or minus the standard deviation of the ensemble mean.