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    Título
    Bulk deposition of atmospheric inorganic nitrogen in mountainous heathland ecosystems in North-Western Spain
    Autor
    Calvo Fernández, Javier
    Marcos Porras, Elena MaríaAutoridad Buleria ORCID
    Calvo Galván, María LeonorAutoridad Buleria ORCID
    Facultad/Centro
    Facultad de Ciencias Biologicas y Ambientales
    Área de conocimiento
    Ecologia
    Datos de la obra
    Atmospheric Research, 2017, vol. 183
    Editor
    Elsevier
    Fecha
    2017-01-01
    Descripción física
    P. 237-244
    Abstract
    Nitrogen (N) deposition has been identified as one of the main traits of terrestrial ecosystems, affecting their structure and functioning. Among terrestrial ecosystems, heathlands are characterised by low nutrient status and highly affected by N deposition. However, few studies have been developed under natural field conditions to evaluate the amount of N deposition in these ecosystems. Therefore, a field experiment was carried out to investigate the inorganic N inputs in mountainous heathlands of North-Western Spain. Two study sites (La Majúa and San Isidro) were selected on the south side of the Cantabrian Mountains, as a representative monitoring N-sensitive ecosystems. Three replicated bulk collectors and one rain gauge were installed at each study site to collect monthly rainwater samples over three years. Wet bulk N deposition was different between the study areas (2.81 kg N ha-1 year-1 in La Majúa and 4.56 kg N ha-1 year-1 in San Isidro), but showed the same temporal pattern, with the highest N deposition rate observed in April and the lowest in August-September. In general, annual wet bulk NO3--N deposition was higher than NH4+-N, reflecting the prevailing NOX emission sources. Depositions of NO3--N were mostly originated by NOX emissions from northern highly industrialized and populated areas of North Spain. The lower NH4+/NO3- ratio in rainwater observed in the study area could be due to the decline of traditional land uses (livestock grazing, heath burning and croplands) associated with NHY emissions. Despite the low rates of N deposition observed in this study, N-sensitive heathlands in North-Western Spain could be threatened by N depositions.
    Materia
    Ecología. Medio ambiente
    Palabras clave
    Bulk nitrogen deposition
    Ammonium/nitrate ratio
    Nitrogen emission source
    Heathland ecosystem
    North-Western Spain
    Idioma
    eng
    Tipo documental
    info:eu-repo/semantics/preprint
    URI
    http://hdl.handle.net/10612/8855
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