Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Ecosystem responses to differing ratios of reduced and oxidised nitrogen inputs
AU - Stevens, Carly
AU - Manning, P.
AU - van den Berg, L.
AU - Lamers, L.
AU - de Graaf, M.C.C.
AU - Wamelink, W.
AU - Boxman, A.
AU - Bleeker, A.
AU - Vergeer, P.
AU - Arroniz-Crespo, M.
AU - Limpens, J.
AU - Bobbink, R.
AU - Dorland, E.
PY - 2011/3
Y1 - 2011/3
N2 - While it is well established that ecosystems display strong responses to elevated nitrogen deposition, the importance of the ratio between the dominant forms of deposited nitrogen (NHx and NOy) in determining ecosystem response is poorly understood. As large changes in the ratio of oxidised and reduced nitrogen inputs are occurring, this oversight requires attention. One reason for this knowledge gap is that plants experience a different NHx:NOy ratio in soil to that seen in atmospheric deposits because atmospheric inputs are modified by soil transformations, mediated by soil pH. Consequently species of neutral and alkaline habitats are less likely to encounter high NH4+ concentrations than species from acid soils. We suggest that the response of vascular plant species to changing ratios of NHx:NOy deposits will be driven primarily by a combination of soil pH and nitrification rates. Testing this hypothesis requires a combination of experimental and survey work in a range of systems.
AB - While it is well established that ecosystems display strong responses to elevated nitrogen deposition, the importance of the ratio between the dominant forms of deposited nitrogen (NHx and NOy) in determining ecosystem response is poorly understood. As large changes in the ratio of oxidised and reduced nitrogen inputs are occurring, this oversight requires attention. One reason for this knowledge gap is that plants experience a different NHx:NOy ratio in soil to that seen in atmospheric deposits because atmospheric inputs are modified by soil transformations, mediated by soil pH. Consequently species of neutral and alkaline habitats are less likely to encounter high NH4+ concentrations than species from acid soils. We suggest that the response of vascular plant species to changing ratios of NHx:NOy deposits will be driven primarily by a combination of soil pH and nitrification rates. Testing this hypothesis requires a combination of experimental and survey work in a range of systems.
KW - Ammonium toxicity
KW - Atmospheric nitrogen deposition
KW - NHx:NOy ratio
KW - Mitigation
KW - Nitrogen cycling
KW - Nitrification
KW - Plant communities
KW - Soil acidification
U2 - 10.1016/j.envpol.2010.12.008
DO - 10.1016/j.envpol.2010.12.008
M3 - Journal article
VL - 159
SP - 665
EP - 676
JO - Environmental Pollution
JF - Environmental Pollution
SN - 0269-7491
IS - 3
ER -