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dc.contributor.authorPrieto, Patricia-
dc.contributor.authorPeñuelas, Josep-
dc.contributor.authorNiinemets, Ü.-
dc.contributor.authorOgaya, Romá-
dc.contributor.authorSchmidt, I. K.-
dc.contributor.authorBeier, C.-
dc.contributor.authorTietema, A.-
dc.contributor.authorSowerby, A.-
dc.contributor.authorEmmett, B. A.-
dc.contributor.authorLang, E. K.-
dc.contributor.authorKroel-Dulay, G.-
dc.contributor.authorLhotsky, B.-
dc.contributor.authorCesaraccio, C.-
dc.contributor.authorPellizzaro, G.-
dc.contributor.authorde Dato, G.-
dc.contributor.authorSirca, C.-
dc.contributor.authorEstiarte, Marc-
dc.identifier.citationGlobal Ecology and Biogeography 18(4) : 473-484 (2009)es_ES
dc.description12 páginas, 7 figuras, 2 tablas.es_ES
dc.description.abstractAim To test whether the onset of spring growth in European shrublands is advanced in response to the warmer conditions projected for the next two decades by climate models, and, if there is a change, whether it differs across Europe. Location The studied sites spanned a broad north–south European gradient with average annual temperatures (8.2–15.6 °C) and precipitation (511–1427 mm). Methods ‘Bud break’ was monitored in eight shrub and grass species in six European sites under control and experimentally warmer conditions generated by automatic roofs covering vegetation during the night. Results Species responsive to increased temperatures were Vaccinium myrtillus and Empetrum nigrum in Wales, Deschampsia flexuosa in Denmark, Calluna vulgaris in Netherlands, Populus alba in Hungary and Erica multiflora in Spain. Although the acceleration of spring growth was the commonest response to warming treatments, the responses at each site were species specific and year dependent. Under experimental warming 25% of cases exhibited a significantly earlier onset of the growing season and 10% had a significantly delayed onset of vegetative growth. No geographical gradient was detected in the experimental warming effects. However, there was a trend towards a greater dominance of phenological advances with more intense the warming treatments. Above 0.8 °C warming, only advancements were recorded. Main conclusions Our results show that warmer temperatures projected for the next decades have substantial potential effects on the phenology of the spring growth of dominant species in different European shrublands, with a dominant trend towards advancements the more intense the warming is. However, our study also demonstrates the overall difficulties of applying simple predictive relationships to extrapolate the effects of global change on phenology. Various combinations of environmental factors occur concurrently at different European sites and the interactions between different drivers (e.g. water and chilling) can alter phenology significantly.es_ES
dc.description.sponsorshipThe work was supported financially by the EU (contracts ENV4-CT97-0694 and EVK2- CT-2000-00094) and the participating research institutes. The CREAF group also received financial help from the Spanish Government (grant CGL2006-04025/BOS and grant Consolider Montes CSD2008-00040) and the Catalan Government (SGR2005-00312). The Hungarian team received financial help from the Hungarian Government (grants NKFP 3B-0008/2002) and the Hungarian Scientific Research Fund OTKA (T34790).es_ES
dc.publisherBlackwell Publishinges_ES
dc.subjectSpring growthes_ES
dc.subjectBud breakes_ES
dc.subjectClimate warminges_ES
dc.subjectEuropean gradientes_ES
dc.subjectExperimental warminges_ES
dc.titleChanges in the onset of spring growth in shrubland species in response to experimental warming along a north-south gradient in Europees_ES
dc.description.peerreviewedPeer reviewedes_ES
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