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Journal Title
Title of Journal: Water Air Soil Pollut
Abbravation: Water, Air, & Soil Pollution
Publisher
Springer Netherlands
DOI
10.1007/s12308-015-0240-9
ISSN
1573-2932
Soil and vegetation descriptions were made of stands of Arnica montana a heathland species declining in The Netherlands Stands where A montana had recently disappeared were also examined Soils where A montana still occurred were richer in Mg Ca K and Na and had a higher soil pH higher cation/N ratios and a lower Al/Ca ratio than soils where A montana had disappeared during the last decade Soil base cation contents were reflected in aboveground biomass base cation contents A relation between soil N content expressed in total soluble N ammonium and nitrate and NH3 deposition was not found Contents of exchangeable Ca K Na and soil N varied strongly within a season Stands with A montana still present also had a relatively high number of other dicots indicating that other Violion caninae herbs simultaneously decline with A montana The extinction of A montana is correlated with a low soil pH and strongly correlated with low levels of available base cations and a high Al/Ca ration Since soil acidification due to deposition of SO2 and NHyincreases leaching of base cations and Al3+ mobilization in the soil the decline of A montana may be explained by the acidification of nutrientpoor soils