Abstract
Surface temperatures have risen globally during the last 30 years, especially in alpine areas. It is recognized that these increases are influencing phenology, physiology and distribution of plants. However, few studies have addressed the effects of climate warming at the species range boundary, where plants are expected to be more stressed. We analysed 11-year data sets of inflorescence production of four alpine plants (Carex foetida, Leucanthemopsis alpina, Senecio incanus, Silene suecica) at the southern boundary of their distribution range in the N-Apennines (N-Italy), in relation to air temperature and snow cover persistence. Inflorescence production of all species fluctuated greatly and was significantly affected by the variation of the mean temperature of June/July. We found significant relationships also between species data series and the snow cover persistence. Moreover, species responded differently to such parameters. One species showed a significant decrease of the reproductive effort, whereas the other three showed a stable trend of inflorescence production. We have shown that some alpine species are favoured by increased temperature and reduced snow cover even at the boundary of their range, where they are thought to be particularly sensitive to warming. However, the aptitude to cope with climate change might be limited by competition against thermophilous species migrating from lower altitude and in some cases by the low altitude of mountain peaks that prevent species upward migration. The individualistic response of species to climate change found here, support the statement that the composition of plant communities might rapidly change in the future.
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Acknowledgements
Authors are grateful to Cecilia Amosso, Luigi Bertin, Paolo Cauzzi, Roberto Dellavedova, Tommaso Dones, Martina Gentilini, Andrea Leonardi, Gilberto Parolo (University of Pavia) for their support in the field during the ten-years monitoring. The Appennino Tosco-Emiliano National Park, University of Pavia, L-TER and SHARE (Ev-K2-CNR, Bergamo) for their interest and funding support to the research. Author thanks Prof. Franco Barbaini (University of Pavia) for his suggestions on the statistical analysis. Authors thank Ruth Eastwood (Seed Conservation Department, Royal Botanic Gardens, Kew) for the improvement of the language and Paolo Bonasoni (ISAC-CNR, Bologna) for his useful comments on climate issues and M. Cimone data. We are also grateful to the two anonymous reviewer for their suggestions useful for improving the quality of our manuscript.
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Abeli, T., Rossi, G., Gentili, R. et al. Response of alpine plant flower production to temperature and snow cover fluctuation at the species range boundary. Plant Ecol 213, 1–13 (2012). https://doi.org/10.1007/s11258-011-0001-5
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DOI: https://doi.org/10.1007/s11258-011-0001-5