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Reduced nitrogen has a greater effect than oxidised nitrogen on dry heathland vegetation

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Aug 2008 Netherlands Publisher:Elsevier BVJournal:Environmental Pollution, volume 154, pages 359-369 (issn: 0269-7491,

Authors: Berg, L.J.L. van den; Peters, C.J.H.; Ashmore, M.R.; Roelofs, J.G.M.;

doi: 10.1016/j.envpol.2007.11.027

pmid: 18206283

handle: 2066/72235

Reduced nitrogen has a greater effect than oxidised nitrogen on dry heathland vegetation

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Abstract

We investigated the effects of different ratios of reduced (NH4+) versus oxidised (NO3(-)) nitrogen in deposition on heathland and species-rich grassland vegetation at high nitrogen deposition levels in large mesocosms filled with nutrient-poor soils to which different NH4+/NO3(-) ratios were applied. The response of the forbs, Antennaria dioica, Arnica montana, Gentiana pneumonanthe, Thymus serpyllum, the grasses Danthonia decumbens, Deschampsia flexuosa, Nardus stricta and the shrub Calluna vulgaris was recorded. The forb A. dioica and the grass D.decumbens preferred low NH4+/NO3(-) ratios and were characterised by a negative correlation between NH4+/NO3(-) ratios and biomass and survival, whereas the grasses N. stricta and D. flexuosa showed no correlation with NH4+/NO3(-) ratios. Lime addition eliminated the negative effects of high NH4+ concentrations in deposition for A. dioica and the grass D. decumbens. The implications of these findings for heathland vegetations are discussed.

Country

Netherlands

Related Organizations

Radboud University Nijmegen
Netherlands
University of York
United Kingdom

Keywords

Chlorophyll, Ecology, Aquatic Ecology, Plant Development, Biodiversity, Hydrogen-Ion Concentration, Plants, Poaceae, Soil, Ammonia, Spectrophotometry, Environmental Pollutants, Nitrogen Oxides, Biomass, Amino Acids, Plants, Edible, Calluna

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	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Top 10%
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Top 10%