| Title | Nitrogen supply modulates the effect of changes in drying-rewetting frequency on soil C and N cycling and greenhouse gas exchange |
| Publication Type | Journal Article |
| Year of Publication | 2015 |
| Authors | Morillas L., Duran J., Rodriguez A., Roales J., Gallardo A., Lovett G.M, Groffman P.M |
| Journal | Global Change Biology |
| Volume | 21 |
| Pagination | 3854-3863 |
| Date Published | Oct |
| Type of Article | Article |
| ISBN Number | 1354-1013 |
| Accession Number | WOS:000360994500025 |
| Keywords | addition, Biodiversity & Conservation, biomass, communities, dissolved organic-carbon, dynamics, ecosystem responses, Environmental Sciences & Ecology, Global change, level physiological profiles, MATTER, Methane, MICROBIAL, Microbial functional diversity, MicroResp, mineralization, nitrogen, nutrient cycling, precipitation pattern, Soil respiration, water |
| Abstract | Climate change and atmospheric nitrogen (N) deposition are two of the most important global change drivers. However, the interactions of these drivers have not been well studied. We aimed to assess how the combined effect of soil N additions and more frequent soil drying-rewetting events affects carbon (C) and N cycling, soil:atmosphere greenhouse gas (GHG) exchange, and functional microbial diversity. We manipulated the frequency of soil drying-rewetting events in soils from ambient and N-treated plots in a temperate forest and calculated the Orwin & Wardle Resistance index to compare the response of the different treatments. Increases in drying-rewetting cycles led to reductions in soil NO3- levels, potential net nitrification rate, and soil:atmosphere GHG exchange, and increases in NH4+ and total soil inorganic N levels. N-treated soils were more resistant to changes in the frequency of drying-rewetting cycles, and this resistance was stronger for C- than for N-related variables. Both the long-term N addition and the drying-rewetting treatment altered the functionality of the soil microbial population and its functional diversity. Our results suggest that increasing the frequency of drying-rewetting cycles can affect the ability of soil to cycle C and N and soil:atmosphere GHG exchange and that the response to this increase is modulated by soil N enrichment.
|
| Short Title | Global Change Biol |
| Alternate Journal | Glob. Change Biol. |
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Times Cited: 66
Cited Reference Count: 86
Morillas, Lourdes Duran, Jorge Rodriguez, Alexandra Roales, Javier Gallardo, Antonio Lovett, Gary M. Groffman, Peter M.
Morillas, Lourdes/AAD-4342-2020; Duran, Jorge/AFN-5619-2022; Gallardo, Antonio/L-3941-2017; Rodríguez Pereiras, Alexandra/C-2879-2015; Lovett, Gary M/H-3800-2013; Roales, Javier/D-4399-2013
Morillas, Lourdes/0000-0002-9544-1188; Duran, Jorge/0000-0002-7375-5290; Gallardo, Antonio/0000-0002-2674-4265; Rodríguez Pereiras, Alexandra/0000-0001-5849-8778; Groffman, Peter/0000-0001-8371-6255; Roales, Javier/0000-0003-2110-5023; Lovett, Gary/0000-0002-8411-8027
Spanish Ministry of Education; Pablo de Olavide University; Fulbright fellowship of Spanish Ministry of Education; Portuguese Science and Technology Foundation [SFRH/BDP/87966/2012]; Spanish National Research Council (CSIC); European Social Fund (ESF)
We thank Lisa Martel, Kate Shepard, and Cristina Allely for excellent laboratory and data analysis work. L. M. was supported by a PhD fellowship of the Spanish Ministry of Education and a short-research stay grant of the Pablo de Olavide University. J. D. was supported by a Fulbright fellowship of the Spanish Ministry of Education, and a Postdoctoral Grant of the Portuguese Science and Technology Foundation (SFRH/BDP/87966/2012). A. R. was supported by a Fulbright fellowship of the Spanish Ministry of Education and by the Spanish National Research Council (CSIC) in the JAE-doc modality cofinanced by the European Social Fund (ESF).
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