Impacts of Nitrogen Deposition on Vegetation
There are a number of broadscale
vegetation surveillance datasets in the UK, but many have
not been fully analysed in relation to nitrogen
deposition from air pollution. In response to a recommendation
in the surveillance strategy, JNCC funded a major analysis of
broadscale vegetation datasets in order to investigate the impact
of nitrogen deposition. Use of existing datasets allowed
surveillance questions to be answered efficiently.
The study clearly demonstrated significant
changes in the abundance of individual species and variables
describing habitat structure and function as a result of N
deposition. This, together with previous evidence from
surveys and experiments, provides clear evidence of species-level
impacts of N deposition in all four of the habitats
The study is published in two parts:
JNCC Report 447: focuses on the
analytical methods and the results.
JNCC Report 449: takes the
results of the new analysis, together with other sources of
independent evidence, and interprets the findings in respect of
implications for “conservation commitments”.
Information is also available on
a nitrogen impacts and
vegetation workshop held by JNCC in 2009 to
inform this study.