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dc.contributor.authorSardans, Jordi-
dc.contributor.authorPeñuelas, Josep-
dc.contributor.authorOgaya, Romá-
dc.date.accessioned2012-10-31T09:30:11Z-
dc.date.available2012-10-31T09:30:11Z-
dc.date.issued2008-09-
dc.identifier.citationEuropean Journal of Soil Biology 44(5-6) : 509-520 (2008)es_ES
dc.identifier.issn1164-5563-
dc.identifier.urihttp://hdl.handle.net/10261/59286-
dc.description12 páginas, 6 figuras, 3 tablas.es_ES
dc.description.abstractA six-year (1999–2005) experiment of drought manipulation was conducted in aQuercusilexMediterraneanforest (Southern Catalonia) to simulate predicted climatic conditions projected for the decades to come. The aim was to investigate the direct and indirect effects of drought conditions on acid and alkalinephosphataseactivity in soil and on P concentrations in soil, leaves and litter throughout the year. Soilacidphosphataseactivity was higher than soilalkalinephosphataseactivity. Droughtreducedacidphosphataseactivity in soil in all seasons, including summer and winter, the seasons with less biological activity due to water and cold stress. Reductions of soil water content between 13 and 29% reducedsoilacidphosphataseactivity between 22 and 27% depending on the season. Droughtreducedalkalinephosphataseactivity (by 28%) only in winter. Soilacid and alkalinephosphataseactivities were positively correlated with soil water content in all seasons. In contrast short-term available-P which increased under drought in several seasons was weakly correlated with soilphosphataseactivities. As a result, immediately/short-term available-P concentration ratios decreased in all the seasons (between 10 and 71%). Droughtincreased foliar P concentration and reduced the C/P concentration ratio in litter fall of the dominant tree Q. ilex. Drought also decreased the ratio between organic C and short-term available-P in soil. The results show that soilphosphataseactivity is more directly dependent on changes in water availability than on changes in its substrate, short-term available-P. These effects of drought have several implications: the accumulation in the soil of labile P not directly available to plants, the increase in potential P losses from leaching and erosion during the torrential rainfalls typical of the Mediterranean climate, and changes in plant, litter and soil C:P stoichiometry that may lead to changes in soil trophic chains.es_ES
dc.description.sponsorshipThis research was supported by the Spanish Government CGL2004-01402/BOS and CGL2006-04025/BOS grants, the EC Integrated project FP6 ALARM (GOCE-CT-2003-506675), a Fundación BBVA 2004 and a Catalan government SGR2005-00312 grant.es_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.rightsclosedAccesses_ES
dc.subjectSoil moisturees_ES
dc.subjectTotal soil-Pes_ES
dc.subjectAcid phosphatase activityes_ES
dc.subjectAlkaline phosphatase activityes_ES
dc.subjectDroughtes_ES
dc.subjectLeaf P concentrationes_ES
dc.subjectLitteres_ES
dc.subjectQuercusilexes_ES
dc.subjectSoiles_ES
dc.subjectSoilorganic matteres_ES
dc.subjectShort-term available-Pes_ES
dc.titleExperimental drought reduced acid and alkaline phosphatase activity and increased organic extractable P in soil in a Quercus ilex Mediterranean forest.es_ES
dc.typeartículoes_ES
dc.identifier.doi10.1016/j.ejsobi.2008.09.011-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.ejsobi.2008.09.011es_ES
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