title: Effects of acidic deposition on in-lake phosphorus availability: a lesson from lakes recovering from acidification.
abstract: Lake water concentrations of phosphorus (P) recently increased in some mountain areas due to elevated atmospheric input of P rich dust. We show that increasing P concentrations also occur during stable atmospheric P inputs in central European alpine lakes recovering from atmospheric acidification. The elevated P availability in the lakes results from (1) increasing terrestrial export of P accompanying elevated leaching of dissolved organic carbon and decreasing phosphate-adsorption ability of soils due to their increasing pH, and (2) decreasing in-lake P immobilization by aluminum (Al) hydroxide due to decreasing leaching of ionic Al from the recovering soils. The P availability in the recovering lakes is modified by the extent of soil acidification, soil composition, and proportion of till and meadow soils in the catchment. These mechanisms explain several conflicting observations of the acid rain effects on surface water P concentrations.
authors: Institute of Hydrobiology, Biology Centre CAS , České Budějovice 370 05, Czech Republic.
authors: Jiří
authors: J
authors: Kopáček
authors: Josef
authors: J
authors: Hejzlar
authors: Jiří
authors: J
authors: Kaňa
authors: Stephen A
authors: SA
authors: Norton
authors: Evžen
authors: E
authors: Stuchlík
mesh_terms: D015258:Acid Rain / Q000009:adverse effects*; D060106:Lakes / Q000737:chemistry*; D010758:Phosphorus / Q000032:analysis*; D012987:Soil / Q000737:chemistry
chemical_list: D015258:Acid Rain; D012987:Soil; D010758:Phosphorus