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Environ Pollut. 2013 Jan;172:250-63. doi: 10.1016/j.envpol.2012.08.015. Epub 2012 Oct 16.

Assessing ozone and nitrogen impact on net primary productivity with a Generalised non-Linear Model.

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  • 1Italian National Agency for New Technologies, Energy and the Environment (ENEA), C.R. Casaccia, Via Anguillarese 301, 00123 S. Maria di Galeria, Rome, Italy. alessandra.demarco@casaccia.enea.it

Abstract

Some studies suggest that in Europe the majority of forest growth increment can be accounted for N deposition and very little by elevated CO(2). High ozone (O(3)) concentrations cause reductions in carbon fixation in native plants by offsetting the effects of elevated CO(2) or N deposition. The cause-effect relationships between primary productivity (NPP) of Quercus cerris, Q. ilex and Fagus sylvatica plant species and climate and pollutants (O(3) and N deposition) in Italy have been investigated by application of Generalised Linear/non-Linear regression model (GLZ model). The GLZ model highlighted: i) cumulative O(3) concentration-based indicator (AOT40F) did not significantly affect NPP; ii) a differential action of oxidised and reduced nitrogen depositions to NPP was linked to the geographical location; iii) the species-specific variation of NPP caused by combination of pollutants and climatic variables could be a potentially important drive-factor for the plant species' shift as response to the future climate change.

Copyright © 2012 Elsevier Ltd. All rights reserved.

PMID:
23078996
[PubMed - indexed for MEDLINE]
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