RT Journal Article
T1 Simulated nitrogen deposition influences soil greenhouse gas fluxes in a Mediterranean dryland
A1 Lafuente, Ángel
A1 Recio, Jaime
A1 Ochoa-Hueso, Raúl
A1 Gallardo, Antonio
A1 Pérez-Corona, Esther
A1 Manrique Eol, Esteban
A1 Durán, Jorge
AB Soil nitrogen (N) availability is a key driver of soil-atmosphere greenhouse gas (GHG) exchange, yet we are far from understanding how increases in N deposition due to human activities will influence the net soilatmosphere fluxes of the three most important GHGs: nitrous oxide (N2O), methane (CH4) and carbon dioxide (CO2). We simulated four levels of N deposition (10, 20 and 50 kg N ha−1 yr−1 , plus unfertilised control) to evaluate their effects on N2O, CH4 and CO2 soil fluxes in a semiarid shrubland in central Spain. After 8 years of experimental fertilisation, increasing N availability led to a consistent increase in N2O emissions, likely due to simultaneous increases in soil microbial nitrification and/or denitrification processes. However, only intermediate levels of N fertilisation reduced CH4 uptake, while increasing N fertilisation had no effects on CO2 fluxes, suggesting complex interactions between N deposition loads and GHG fluxes. Our study provides novel insight into the responses of GHGs to N deposition in drylands, forecasting increases in N2O emissions, and decreases in CH4 uptake rates, with likely consequences to the on-going climate change.
PB Elsevier
SN 0048-9697, ESSN 1879-1026
YR 2020
FD 2020-05-23
LK https://hdl.handle.net/20.500.14352/6611
UL https://hdl.handle.net/20.500.14352/6611
LA eng
NO Ministerio de Economía y Competitividad (MINECO)
NO Ministerio de Ciencia, Innovación y Universidades(MICIU)
NO Comunidad de Madrid/ FEDER
NO Fundação para Ciência e Tecnologia
NO Fondo Europeo de Desarrollo Regional (FEDER)
DS Docta Complutense
RD 17 abr 2025