Simulated nitrogen deposition influences soil greenhouse gas fluxes in a Mediterranean dryland
| العنوان: | Simulated nitrogen deposition influences soil greenhouse gas fluxes in a Mediterranean dryland |
|---|---|
| المؤلفون: | Antonio Gallardo, Jaime Recio, Raúl Ochoa-Hueso, Esteban Manrique, Jorge Durán, M. Esther Pérez-Corona, Angela Lafuente |
| المصدر: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Environmental Engineering, Denitrification, 010504 meteorology & atmospheric sciences, Global change, Nitrous oxide, 010501 environmental sciences, 01 natural sciences, Pollution, Methane, chemistry.chemical_compound, chemistry, Environmental chemistry, Greenhouse gas, Carbon dioxide, Environmental Chemistry, Environmental science, Nitrification, Waste Management and Disposal, Deposition (chemistry), 0105 earth and related environmental sciences |
| الوصف: | 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 soil-atmosphere 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. |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a36051d9db815556b084d1efd8155602 http://hdl.handle.net/10261/233637 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....a36051d9db815556b084d1efd8155602 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |