Official Statistics
Sensitive habitats where critical loads for acidification and eutrophication were exceeded: 1996 to 2008
Updated 23 May 2011
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| Title: | Sensitive habitats where critical loads for acidification and eutrophication were exceeded: 1996 to 2008 | |||||||
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| Year: | 1995 to 2008 | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Geography: | United Kingdom | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Units: | Percentage area of sensitive habitats with exceedance of acidity critical loads | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Source: | Centre for Ecology and Hydrology (Wallingford) (CEH) | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| URL: | Not set | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Copyright: | Copyright of data and/or information presented or attached in this document may not reside solely with this Department. | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Nat. Statistic: | No | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Custodian | Environment Statistics Service, Department for Environment, Food and Rural Affairs, Area 6E Ergon House, 17 Smith Square, London SW1P 3JR, 08459 33 55 77 | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Contact: | enviro.statistics@defra.gsi.gov.uk | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Release Date: | Apr-10 | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Notes: | CRITICAL LOADS DATA | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | Critical loads & habitat data are as submitted to the CCE in March 2008 (cload/critical_loads/cloads_2007) consisting of: | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | (i) Critical loads February 2004 version (but see comment (iv)) for all habitats except dwarf shrub heath (acidity) and freshwaters - see below: | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | (ii) Dwarf shrub heath acidity critical loads (CLminN & CLmaxN) updated in March 2008 with lower values of Nfire for dry heathlands | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | (iii) Freshwaters data from March 2008 include an additional 35 sites on the North York moors, increasing the total area of freshwater habitats in the UK with acidity critical loads by 67 km2 | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | (iv) All data now mapped with NI in correct position on GB grid - the grid transformation of the habitat & critical loads data resulted in an increase in the habitat area of 2 km2 for acidity and 9 km2 for nutrient nitrogen | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | (v) Results for 2004-06 include updated acidity critical loads for bog (assumes all bog on peat soils) | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | (vi) Results for 2004-06 for freshwaters use catchment-weighted ecosystem-specific deposition (previously used catchment-weighted grid-average deposition for all vegetation types). | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | (vii) Results for 2006-08 based on same methods/data as 2004-06. | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | (viii) Nutrient nitrogen results for all years updated based on empirical critical loads of nutrient nitrogen upated in March 2011 (mass balance critical loads for managed woodlands remain unchanged). | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | PLEASE REFER TO "env_stats_changes_explanation_v2.docx" FOR EXPLANATION OF CHANGES FROM APRIL 2010 | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | Not set | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | DEPOSITION DATA | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | All results in this workbook based on CEH Edinburgh 5x5km CBED data | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | Using the new ArcGIS procedures the deposition data for NI are no longer converted to the Irish Grid (resulting in some small differences in the deposition values compared to the previous method where data were transformed) | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | For freshwaters catchment-weighted deposition values are derived from the CBED grid average deposition. | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | CBED "moorland" values are applied to non-woodland terrestrial habitats and CBED "woodland" deposition applied to the woodland habitats. | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | (i) Results for 1995-97, 1998-2000, 1999-2001 all based on the March 2004 versions of the CBED. | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | (ii) Results for 2001-2003 based on the April 2005 version of the CBED - which includes nitric acid (not in the earlier data sets as network not in operation) | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | (iii) Results for 2002-2004 based on May 2006 version of the CBED - which additionally includes aerosol deposition of NH4, NO3, SO4, not included in earlier data sets. | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | (iv) Results for 2003-2005 based on May 2006 version of CBED (ie, as for (iii)) | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | (v) Results for 2004-2006 based on May 2006 version of CBED | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | (vi) Results for 2006-2008 based on May 2006 version of CBED. | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | Not set | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | Not set | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| ACIDITY - these results remain unchanged from those provided in April 2010. | Not set | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Percentage area of sensitive habitats with exceedance of acidity critical loads | Not set | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Country | Percentage habitat area exceeded by deposition data for: | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | 1995-1997 | 1998-2000 | 1999-2001 | 2001-2003 | 2002-2004 | 2003-2005 | 2004-2006 | 2006-2008 |
| England | 75.8 | 71.6 | 71.9 | 72.3 | 72.3 | 71.8 | 70.4 | 67.6 |
| Wales | 90 | 83.1 | 83 | 82.4 | 82.3 | 83.2 | 82.5 | 80.4 |
| Scotland | 68.2 | 52.6 | 51.6 | 43 | 44.8 | 44.5 | 49.8 | 42.8 |
| NI | 76.8 | 67.2 | 66.8 | 67.4 | 69.2 | 67.1 | 69 | 69.5 |
| UK | 72.6 | 60.8 | 60.3 | 55 | 56.2 | 55.9 | 58.8 | 53.7 |
| Not set | Not set | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| PLEASE REFER TO "env_stats_changes_explanation_v2.docx" FOR EXPLANATION OF CHANGES FROM APRIL 2010 | Not set | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| NUTRIENT NITROGEN - these results updated using empirical critical loads of nitrogen updated in March 2011 (mass balance critical loads for managed woodlands unchanged). | Not set | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Percentage area of sensitive habitats with exceedance of nutrient nitrogen critical loads | Not set | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Country | Percentage habitat area exceeded by deposition data for: | Not set | Not set | Not set | Not set | Not set | Not set | Not set |
| Not set | 1995-1997 | 1998-2000 | 1999-2001 | 2001-2003 | 2002-2004 | 2003-2005 | 2004-2006 | 2006-2008 |
| England | 98.3 | 97.6 | 97.7 | 97.8 | 97.6 | 97.5 | 97.6 | 97.2 |
| Wales | 98 | 92.5 | 91.1 | 93.5 | 93.3 | 94.1 | 94 | 94 |
| Scotland | 59.4 | 48.9 | 50.9 | 47.7 | 50.2 | 50.6 | 57 | 54.4 |
| NI | 92.6 | 80 | 82.5 | 85.4 | 86.3 | 83.8 | 87 | 88.7 |
| UK | 75 | 67.5 | 68.7 | 67.1 | 68.6 | 68.8 | 72.7 | 71.2 |