Atmospheric deposition of inorganic nitrogen in Spanish holm oak forests measured with ion-exchange resins and conventional collectors
García-Gómez, Héctor (Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (Espanya))
Izquieta-Rojano, Sheila (Universidad de Navarra. Laboratorio Integrado de Calidad Ambiental)
Aguillaume Rodríguez-O'connor, Laura (Centre de Recerca Ecològica i d'Aplicacions Forestals)
González-Fernández, Ignacio (Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (Espanya))
Valiño, Fernando (Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (Espanya))
Elustondo, David (Universidad de Navarra. Laboratorio Integrado de Calidad Ambiental)
Santamaría Ulecia, Jesús Miguel (Universidad de Navarra. Laboratorio Integrado de Calidad Ambiental)
Àvila i Castells, Anna (Universitat Autònoma de Barcelona)
Fenn, Mark E. (United States. Forest Service)
Alonso, Rocío (Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (Espanya))

Date:	2017
Abstract:	Atmospheric nitrogen deposition is one of the main threats for biodiversity and ecosystem functioning. Measurement techniques like ion-exchange resin collectors (IECs), which are less expensive and timeconsuming than conventional methods, are gaining relevance in the study of atmospheric deposition and are recommended to expand monitoring networks. In the present work, bulk and throughfall deposition of inorganic nitrogen were monitored in three different holm oak forests in Spain during two years. The results obtained with IECs were contrasted with a conventional technique using bottle collectors and with a literature review of similar studies. The performance of IECs in comparison with the conventional method was good for measuring bulk deposition of nitrate and acceptable for ammonium and total dissolved inorganic nitrogen. Mean annual bulk deposition of inorganic nitrogen ranged 3. 09 e5. 43 kg N ha1 according to IEC methodology, and 2. 42e6. 83 kg N ha1 y1 using the conventional method. Intra-annual variability of the net throughfall deposition of nitrogen measured with the conventional method revealed the existence of input pulses of nitrogen into the forest soil after dry periods, presumably originated from the washing of dry deposition accumulated in the canopy. Important methodological recommendations on the IEC method and discussed, compiled and summarized.
Grants:	European Commission 282910 European Commission LIFE13 ENV/ES/000417 Ministerio de Ciencia e Innovación CGL2009-13188-C03-02
Rights:	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.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Pollution monitoring ; Mediterranean region ; Methodology review ; Holm oak ; Spain
Published in:	Environmental pollution, Vol. 216 (Sep. 2016) , p. 653-661, ISSN 0269-7491

Adreça alternativa: https://www.fs.usda.gov/treesearch/pubs/52648
DOI: 10.1016/j.envpol.2016.06.027

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Articles > Research articles
Articles > Published articles