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Effects of UV radiation and rainfall reduction on leaf and soil parameters related to C and N cycles of a Mediterranean shrubland before and after a controlled fire

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dc.contributor Universitat de Vic - Universitat Central de Catalunya. Facultat de Ciències i Tecnologia
dc.contributor.author Díaz-Guerra, Laura
dc.contributor.author Verdaguer, D.
dc.contributor.author Gispert, M.
dc.contributor.author Pardini, G.
dc.contributor.author González, J. A.
dc.contributor.author Peruzzi, E.
dc.contributor.author Masciandaro, G.
dc.contributor.author Llorens, L.
dc.contributor.author Font, Joan
dc.date.accessioned 2018-05-15T17:09:56Z
dc.date.available 2018-05-15T17:09:56Z
dc.date.created 2018
dc.date.issued 2018
dc.identifier.citation Díaz-Guerra, L,, Verdaguer, D., Gispert, M., Pardini, G., Font, J., González, J.A., Peruzzi, E., Masciandaro, G., Llorens L. (2018). Effects of UV radiation and rainfall reduction on leaf and soil parameters related to C and N cycles of a Mediterranean shrubland before and after a controlled fire. Plant and Soil, 424 (1-2), 503-524. es
dc.identifier.issn 0032-079X
dc.identifier.uri http://hdl.handle.net/10854/5444
dc.description.abstract Background and aims In the Mediterranean basin, reduction in cloudiness owing to climate change is expected to enhance solar ultraviolet (UV) levels and to decrease rainfall over the coming years, which would be accompanied by more frequent and intense wildfires. The aim of the present study was to investigate the role of solar UV-A and UV-B radiation in C and N pools of a Mediterranean shrubland and whether drier conditions could alter this role before and after a fire. Methods Over a three-year field experiment, 18 plots of 9 m2 were subjected to three UV conditions (UV-A + UV-B exclusion, UV-B exclusion or near-ambient UV-A + UV-B exposure) combined with two rainfall regimes (natural or reduced rainfall). Several parameters related to C and N cycles in the soil and in the leaves and litter of two dominant plant species (Arbutus unedo and Phillyrea angustifolia) were measured before and after an experimental fire. Results UV-A exposure increased soil moisture throughout the study period, as well as respiration before the fire. The additional presence of UV-B decreased β- glucosidase activity at 5–10 cm depth and soil respiration and pH. UV-B exposure also raised leaf C concentration in P. angustifolia and δ15N values in A. unedo. Reduced rainfall often emphasized the opposite effects of UV-A and UV-B on the studied parameters. After the fire, most of the UVand rainfall effects were lost. Conclusion UV-A exposure seems to stimulate soil biological activity and, thus, C and N turn-over, while the effect of UV-B would be the opposite. At least in the short term, the "homogenizing influence" of fire would probably have a stronger effect on the C and N cycles than the expected changes in UVand rainfall levels. es
dc.format application/pdf es
dc.format.extent 22 p. es
dc.language.iso eng es
dc.publisher Springer es
dc.rights Tots els drets reservats es
dc.rights © Springer (The original publication is available at www.springerlink.com)
dc.subject.other Sequeres es
dc.subject.other Matollars -- Mediterrània (Catalunya : Costa) es
dc.subject.other Cicle del nitrogen es
dc.title Effects of UV radiation and rainfall reduction on leaf and soil parameters related to C and N cycles of a Mediterranean shrubland before and after a controlled fire es
dc.type info:eu-repo/semantics/article es
dc.identifier.doi https://doi.org/10.1007/s11104-017-3485-5
dc.rights.accesRights info:eu-repo/semantics/openAccess es
dc.type.version info:eu-repo/publishedVersion es
dc.indexacio Indexat a WOS/JCR es
dc.indexacio Indexat a SCOPUS es

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