Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | The role of nitrogen deposition in the recent nitrate decline in lakes and rivers in Northern Italy |
| Abstract | Deposition of inorganic nitrogen (N) in north-western Italy is around 20-25 kg N ha(-1) y(-1), and has remained constant during the last 30 years. This flux of N caused saturation of terrestrial catchments and increasing levels of nitrate (NO3) in surface waters. Recently, monitoring data for both rivers and lakes have shown a reversal in NO3 trends.This change was widespread, affecting high-altitude lakes in the Alps and subalpine lakes and rivers, and occurred at almost the same time at all sites. The seasonal pattern of NO3 concentrations in running waters has shown a change in the last few years, with a tendency towards slightly lower leaching of NO3 during the growing season. Atmospheric input of N has also shown a recent decrease, mainly due to decreasing emissions and partly to the lower amount of precipitation occurring between 2003 and 2009. Surface waters are probably responding to these changing N inputs, but a further decrease of N deposition, especially reduced N, will be required to achieve full recovery from N saturation |
| Source | Science of the total environment 417-418C, pp. 219–228 |
| Keywords | NitrateAmmoniumNitrogen saturationLong-term trendClimate change |
| Journal | Science of the total environment |
| Editor | Elsevier, Lausanne ;, Paesi Bassi |
| Year | 2012 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.scitotenv.2011.12.067 |
| Authors | Michela Rogora; Silvia Arisci; Aldo Marchetto |
| Text | 215450 2012 10.1016/j.scitotenv.2011.12.067 Nitrate Ammonium Nitrogen saturation Long term trend Climate change The role of nitrogen deposition in the recent nitrate decline in lakes and rivers in Northern Italy Michela Rogora; Silvia Arisci; Aldo Marchetto CNR Istituto per lo Studio degli Ecosistemi Deposition of inorganic nitrogen N in north western Italy is around 20 25 kg N ha 1 y 1 , and has remained constant during the last 30 years. This flux of N caused saturation of terrestrial catchments and increasing levels of nitrate NO3 in surface waters. Recently, monitoring data for both rivers and lakes have shown a reversal in NO3 trends.This change was widespread, affecting high altitude lakes in the Alps and subalpine lakes and rivers, and occurred at almost the same time at all sites. The seasonal pattern of NO3 concentrations in running waters has shown a change in the last few years, with a tendency towards slightly lower leaching of NO3 during the growing season. Atmospheric input of N has also shown a recent decrease, mainly due to decreasing emissions and partly to the lower amount of precipitation occurring between 2003 and 2009. Surface waters are probably responding to these changing N inputs, but a further decrease of N deposition, especially reduced N, will be required to achieve full recovery from N saturation 417 418C Published version Rogora et al STOTEN 2012 Rogora_etal_2012.pdf Articolo in rivista Elsevier 0048 9697 Science of the total environment Science of the total environment Sci. total environ. ARISCI SILVIA aldo.marchetto MARCHETTO ALDO michela.rogora ROGORA MICHELA TA.P02.014.002 Impatto dei cambiamenti globali sugli ecosistemi acquatici |