Nitrogen deposition and the biodiversity of boreal forests: Implications for the nitrogen critical load. Nordin, A., Strengbom, J., Witzell, J., Nasholm, T., & Ericson, L. Ambio, 34(1):20–24, February, 2005. Place: Dordrecht Publisher: Springer WOS:000226782600003doi abstract bibtex The critical load concept is used to establish the deposition levels which ecosystems can tolerate without significant harmful effects. Here we summarize work within the Swedish research program Abatement Strategies for Transboundary Air Pollution (ASTA) assessing the critical load of N for boreal forests. Results from both field experiments in an area with low background N deposition in northern Sweden, and from a large-scale monitoring study, show that important vegetational changes start to take place when adding low N doses and that recovery of the vegetation after ceasing N input is a very slow process. The data presented indicate that changes in key ecosystem components occur even at a lower rate of N input than the present recommended empirical critical load for boreal forest understorey vegetation of 10-15 kg N ha(-1) yr(-1). Based on the data presented, we suggest that the critical load should be lowered to 6 kg N ha(-1) yr(-1).
@article{nordin_nitrogen_2005,
title = {Nitrogen deposition and the biodiversity of boreal forests: {Implications} for the nitrogen critical load},
volume = {34},
issn = {0044-7447},
shorttitle = {Nitrogen deposition and the biodiversity of boreal forests},
doi = {10.1639/0044-7447(2005)034[0020:NDATBO]2.0.CO;2},
abstract = {The critical load concept is used to establish the deposition levels which ecosystems can tolerate without significant harmful effects. Here we summarize work within the Swedish research program Abatement Strategies for Transboundary Air Pollution (ASTA) assessing the critical load of N for boreal forests. Results from both field experiments in an area with low background N deposition in northern Sweden, and from a large-scale monitoring study, show that important vegetational changes start to take place when adding low N doses and that recovery of the vegetation after ceasing N input is a very slow process. The data presented indicate that changes in key ecosystem components occur even at a lower rate of N input than the present recommended empirical critical load for boreal forest understorey vegetation of 10-15 kg N ha(-1) yr(-1). Based on the data presented, we suggest that the critical load should be lowered to 6 kg N ha(-1) yr(-1).},
language = {English},
number = {1},
journal = {Ambio},
author = {Nordin, A. and Strengbom, J. and Witzell, J. and Nasholm, T. and Ericson, L.},
month = feb,
year = {2005},
note = {Place: Dordrecht
Publisher: Springer
WOS:000226782600003},
keywords = {accumulation, acidification, bryophytes, diversity, ecosystem, fertilization, growth, plants, sphagnum, vegetation},
pages = {20--24},
}
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