Throughfall and bulk deposition of dissolved organic nitrogen to holm oak forests in the Iberian Peninsula : flux estimation and identification of potential sources
Izquieta-Rojano, Sheila (Universidad de Navarra. Laboratorio Integrado de Calidad Ambiental)
García-Gómez, Héctor (Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (Espanya))
Aguillaume Rodríguez-O'connor, Laura (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Santamaría Ulecia, Jesús Miguel (Universidad de Navarra. Laboratorio Integrado de Calidad Ambiental)
Tang, Y. S. (Centre for Ecology and Hidrology (Regne Unit))
Santamaría, C. (Universidad de Navarra. Laboratorio Integrado de Calidad Ambiental)
Valiño, Fernando (Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (Espanya))
Lasheras, E. (Universidad de Navarra. Laboratorio Integrado de Calidad Ambiental)
Alonso, Rocío (Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (Espanya))
Àvila i Castells, Anna (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Cape, J. N. (Centre for Ecology and Hidrology (Regne Unit))
Elustondo, David (Universidad de Navarra. Laboratorio Integrado de Calidad Ambiental)

Fecha:	2016
Resumen:	Deposition of dissolved organic nitrogen (DON) in both bulk precipitation (BD) and canopy throughfall (TF) has been measured for the first time in the western Mediterranean. The study was carried out over a year from 2012 to 2013 at four evergreen holm oak forests located in the Iberian Peninsula: two sites in the Province of Barcelona (Northeastern Spain), one in the Province of Madrid (central Spain) and the fourth in the Province of Navarra (Northern Spain). In BD the annual volume weighted mean (VWM) concentration of DON ranged from 0. 25 mg l⁻¹ in Madrid to 1. 14 mg l⁻¹ in Navarra, whereas in TF it ranged from 0. 93 mg l⁻¹ in Barcelona to 1. 98 mg l⁻¹ in Madrid. The contribution of DON to total nitrogen deposition varied from 34% to 56% in BD in Barcelona and Navarra respectively, and from 38% in Barcelona to 72% in Madrid in TF. Agricultural activities and pollutants generated in metropolitan areas were identified as potential anthropogenic sources of DON at the study sites. Moreover, canopy uptake of DON in Navarra was found in spring and autumn, showing that organic nitrogen may be a supplementary nutrient for Mediterranean forests, assuming that a portion of the nitrogen taken up is assimilated during biologically active periods.
Ayudas:	European Commission 262254 Ministerio de Ciencia e Innovación CGL2009-13188-C03-01
Nota:	Acknowledgments: the research leading to these results has received funding from the COST organism (European cooperation in science and technology), through the COST Action FP0903 "Climate change and forest mitigation and adaptation in the polluted environment" under the grant number COST-STSM-ECOST-STSM-FP0903-291012-019757.
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Materia:	Anthropogenic nitrogen ; Bulk deposition ; Canopy throughfall ; Dissolved organic nitrogen ; Mediterranean ecosystems
Publicado en:	Environmental pollution, Vol. 210 (March 2016) , p. 104-112, ISSN 0269-7491

DOI: 10.1016/j.envpol.2015.12.002

Post-print 21 p, 802.7 KB

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