Effects of reduced nitrogen and sulphur deposition on the water chemistry  of moorland pools.
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.
van Kleef
Hein H
HH
Bargerveen Foundation, Radboud University Nijmegen, 6500 GL Nijmegen, The Netherlands. h.vankleef@science.ru.nl
Brouwer
Emiel
E
Leuven
Rob S E W
RS
van Dam
Herman
H
de Vries-Brock
Ankie
A
van der Velde
Gerard
G
Esselink
Hans
H
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*
D015258:Acid Rain; D014874:Water Pollutants, Chemical; D013455:Sulfur; D009584:Nitrogen