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Freshwater Umbrella third Annual Report October 2010

Curtis, Chris; Simpson, Gavin; Heaton, Tim; Maberly, Stephen; Evans, Chris; Feuchtmayr, Heidrun; Shilland, James; Turner, Simon; Kernan, Martin; Jones, Tim; Burden, Annette; Shilland, Ewan. 2010 Freshwater Umbrella third Annual Report October 2010. UCL, 122pp. (CEH Project Number: C03639) (Unpublished)

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Abstract/Summary

The work programme under the Freshwater Umbrella has been designed to provide the best available means for addressing key DEFRA policy questions regarding the effects of N deposition on upland lakes and streams. These questions may be summarised as: 1. What is the spatial extent of acidification and eutrophication in UK upland lakes and streams which may be attributed to or exacerbated by N deposition? 2. How successful have S and N emission reduction policies been to date in reducing or preventing acidification (measured as critical load exceedance) and eutrophication of sensitive freshwaters in the UK? 3. Which forms of N deposition lead to NO3 - leaching into surface waters? 4. Since only a small proportion of deposited N currently leaks into surface waters, which factors control leaching and how do they change through time, i.e. will the major increases in NO3 - leaching predicted by mass-balance models occur over policy-relevant timescales (years to decades)? 5. How will future reductions in NOx or ammonia emissions affect NO3 - leaching and hence the acidification or eutrophication status of surface waters, and over what timescales?

Item Type: Publication - Report (UNSPECIFIED)
Programmes: CEH Topics & Objectives 2009 onwards > Water > WA Topic 2 - Ecohydrological Processes > WA - 2.3 - Assess the responses of river, lake and wetland ecosystems to ecohydrological drivers
CEH Sections: Emmett
Parr
Funders/Sponsors: DEFRA
NORA Subject Terms: Ecology and Environment
Date made live: 16 Dec 2010 13:40
URI: http://nora.nerc.ac.uk/id/eprint/12413

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