Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | LACUSTRINE WETLAND IN AN AGRICULTURAL CATCHMENT: NITROGEN REMOVAL AND RELATED BIOGEOCHEMICAL PROCESSES |
| Abstract | The role of specific catchment areas, such as the soil-river or lake interfaces, in removing or buffering the flux of N from terrestrial to aquatic ecosystems is globally recognized but the extreme variability of microbiological and hydrological processes make it difficult to predict the extent to which different wetlands function as buffer systems. In this paper we evaluate the degree to which biogeochemical processes in a lacustrine wetland are responsible for the nitrate removal from ground waters feeding Candia Lake (Northern Italy). A transect of 18 piezometers was installed perpendicular to the shoreline, in a sub-unit formed by 80m of poplar plantation, close to a crop field and 30m of reed swamp. The chemical analysis revealed a drastic NO-3 -N ground water depletion from the crop field to the lake, with concentrations decreasing from 15-18 mg N/l to the detection limit within the reeds. Patterns of Cl-, SO2-4 , O2, NO-2 -N, HCO-3 and DOC suggest that the metabolic activity of bacterial communities, based on the differential use of electron donors and acceptors in redox reactions is the key function of this system. The significant inverse relationship found between NO-3 -N and HCO-3 is a valuable indicator of the denitrification activity. The pluviometric regime, the temperature, the organic carbon availability and the hydrogeomorphic properties are the main environmental factors affecting the N transformations in the studied lacustrine ecosystem. |
| Source | Hydrology and earth system sciences 78, pp. 539–550 |
| Keywords | Biological uptakeCritical loadDissolved organic nitrogenThroughfall |
| Journal | Hydrology and earth system sciences |
| Editor | Copernicus Publ., Göttingen, Germania |
| Year | 2008 |
| Type | Articolo in rivista |
| DOI | 10.5194/hess-12-539-2008 |
| Authors | BALESTRINI R.; ARESE C.; DELCONTE C. |
| Text | 42264 2008 10.5194/hess 12 539 2008 ISI Web of Science WOS 000256968000019 Biological uptake Critical load Dissolved organic nitrogen Throughfall LACUSTRINE WETLAND IN AN AGRICULTURAL CATCHMENT NITROGEN REMOVAL AND RELATED BIOGEOCHEMICAL PROCESSES BALESTRINI R.; ARESE C.; DELCONTE C. IRSA U.O.S. di Brugherio The role of specific catchment areas, such as the soil river or lake interfaces, in removing or buffering the flux of N from terrestrial to aquatic ecosystems is globally recognized but the extreme variability of microbiological and hydrological processes make it difficult to predict the extent to which different wetlands function as buffer systems. In this paper we evaluate the degree to which biogeochemical processes in a lacustrine wetland are responsible for the nitrate removal from ground waters feeding Candia Lake Northern Italy . A transect of 18 piezometers was installed perpendicular to the shoreline, in a sub unit formed by 80m of poplar plantation, close to a crop field and 30m of reed swamp. The chemical analysis revealed a drastic NO 3 N ground water depletion from the crop field to the lake, with concentrations decreasing from 15 18 mg N/l to the detection limit within the reeds. Patterns of Cl , SO2 4 , O2, NO 2 N, HCO 3 and DOC suggest that the metabolic activity of bacterial communities, based on the differential use of electron donors and acceptors in redox reactions is the key function of this system. The significant inverse relationship found between NO 3 N and HCO 3 is a valuable indicator of the denitrification activity. The pluviometric regime, the temperature, the organic carbon availability and the hydrogeomorphic properties are the main environmental factors affecting the N transformations in the studied lacustrine ecosystem. 78 http //www.hydrol earth syst sci.net/12/539/2008/hess 12 539 2008.pdf Lacustrine wetland in an agricultural catchment nitrogen removal and related biogeochemical processes Balestrinietal_2008_Hydrology_EarthSystemScience.pdf Articolo in rivista Copernicus Publ. 1027 5606 Hydrology and earth system sciences Hydrology and earth system sciences Hydrol. earth syst. sci. Hydrology and earth system sciences. HESS Gottingen. Print Hydrology and earth system sciences Print ARESE CRISTINA carloandrea.delconte DELCONTE CARLO ANDREA raffaella.balestrini BALESTRINI RAFFAELLA TA.P04.032.001 Funzionalita degli ecosistemi acquatici dinamica dei nutrienti, idromorfologia e habitat fluviali |