title: Effects of reduced nitrogen and sulphur deposition on the water chemistry  of moorland pools.
abstract: To assess changes as a result of reduced acidifying deposition, water chemistry data from 68 Dutch moorland pools were collected during the periods 1983-1984 and 2000-2006. Partial recovery was observed: nitrate- and ammonium-N, sulphur and aluminium concentrations decreased, while pH and alkalinity increased. Calcium and magnesium concentrations decreased. These trends were supported by long term monitoring data (1978-2006) of four pools. Increased pH correlated with increases in orthophosphate and turbidity, the latter due to stronger coloration by organic acids. Increased ortho-phosphate and turbidity are probably the result of stronger decomposition of organic sediments due to decreased acidification and may hamper full recovery of moorland pool communities. In addition to meeting emission targets for NO(x), NH(x) and SO(x), restoration measures are still required to facilitate and accelerate recovery of acidified moorland pools.
authors.affiliation: Bargerveen Foundation, Radboud University Nijmegen, 6500 GL Nijmegen, The Netherlands. h.vankleef@science.ru.nl
authors.forename: Hein H
authors.initials: HH
authors.lastname: van Kleef
authors.forename: Emiel
authors.initials: E
authors.lastname: Brouwer
authors.forename: Rob S E W
authors.initials: RS
authors.lastname: Leuven
authors.forename: Herman
authors.initials: H
authors.lastname: van Dam
authors.forename: Ankie
authors.initials: A
authors.lastname: de Vries-Brock
authors.forename: Gerard
authors.initials: G
authors.lastname: van der Velde
authors.forename: Hans
authors.initials: H
authors.lastname: Esselink
mesh_terms: D015258:Acid Rain; D004777:Environment; D004784:Environmental Monitoring; D005618:Fresh Water / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D009584:Nitrogen / Q000032:analysis / Q000737:chemistry*; D013455:Sulfur / Q000032:analysis / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*
chemical_list: D015258:Acid Rain; D014874:Water Pollutants, Chemical; D013455:Sulfur; D009584:Nitrogen