Can atmospheric input of nitrogen affect seed bank dynamics in habitats of conservation interest? The case of dune slacks
Plassmann, Katharina; Brown, Nigel; Jones, M. Laurence M.; Edwards-Jones, Gareth. 2008 Can atmospheric input of nitrogen affect seed bank dynamics in habitats of conservation interest? The case of dune slacks. Applied Vegetation Science, 11 (3). 413-420. 10.3170/2008-7-18498Full text not available from this repository.
Questions: Does the increased atmospheric deposition of nitrogen, which can have major effects on the established vegetation of nutrient-poor habitats, also impact germination from the soil seed bank? Location: Coastal dune slacks at Newborough Warren. Wales, UK. Methods: The effects of nitrogen addition (15 kg.ha(-1).a(-1)) on seed germination from the soil seed bank were investigated using the seedling emergence method between September 2004 and February 2005. Results: More seedlings emerged from fertilised samples than unfertilised controls. Most species showed enhanced germination after fertilisation with nitrogen. with seedling numbers statistically significantly greater in nitrogen addition samples in a quarter of species abundant enough for analysis. Species that responded positively to fertilisation were species with low Ellenberg indicator values indicative of infertile sites. Conclusions: Most species showed increased germination after fertilisation with nitrogen, including early successional species normally growing in nutrient-poor conditions. This suggests that the increased atmospheric deposition of nitrogen probably not only impacts on established vegetation, but also has the potential to alter seed bank dynamics.
|Programmes:||CEH Programmes pre-2009 publications > Biogeochemistry|
|Additional Keywords:||Eutrophication, Newborough Warren, Seed germination, Seedling emergence method|
|NORA Subject Terms:||Ecology and Environment|
|Date made live:||06 Mar 2009 12:33|
Actions (login required)