Memorias de investigación
Artículos en revistas:
Nitrogen deposition alters nitrogen cycling and reduces soil carbon content in low-productivity semiarid Mediterranean ecosystems.
Año:2013
Áreas de investigación
  • Ciencias naturales y ciencias de la salud
Datos
Descripción
Anthropogenic N deposition poses a threat to European Mediterranean ecosystems. We combined data from an extant N deposition gradient (4.3e7.3 kg N ha?1 yr?1) from semiarid areas of Spain and a field experiment in central Spain to evaluate N deposition effects on soil fertility, function and cyanobacteria community. Soil organic N did not increase along the extant gradient. Nitrogen fixation decreased along existing and experimental N deposition gradients, a result possibly related to compositional shifts in soil cyanobacteria community. Net ammonification and nitrification (which dominated N-mineralization) were reduced and increased, respectively, by N fertilization, suggesting alterations in the N cycle. Soil organic C content, C:N ratios and the activity of b-glucosidase decreased along the extant gradient in most locations. Our results suggest that semiarid soils in low-productivity sites are unable to store additional N inputs, and that are also unable to mitigate increasing C emissions when experiencing increased N deposition.
Internacional
Si
JCR del ISI
Si
Título de la revista
Environmental Pollution
ISSN
0269-7491
Factor de impacto JCR
3,73
Información de impacto
Volumen
DOI
Número de revista
179
Desde la página
185
Hasta la página
193
Mes
SIN MES
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Participantes
  • Autor: Mark Richard Theobald . UPM
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Contaminación de agroecosistemas por las prácticas agrícolas
  • Departamento: Química y Análisis Agrícola