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Title

Reconstructing and forecasting Scots pine growth patterns across its range edges

AuthorsMatías Resina, Luis; Linares, J.C; Sánchez-Miranda, A.; Jump, Alistair S.
Issue Date19-May-2015
CitationTRACE 2015: Tree Rings in Archaeology, Climatology and Ecology 20-23 May Sevilla, Spain. (2015)
AbstractOngoing changes in global climate are altering ecological conditions for many species. But consequences of climatic variations in tree growth usually vary within the distribution of a single species. The consequences of such changes are typically most evident at the edge of the geographical distribution of a species, where differences in growth or population dynamics may result in range expansions or contractions.This is especially important for those species with a wide distribution range, subjected to different climatic pressures at latitudinal or altitudinal range edges. The identification of current demographical status at geographical range limits can help us to predict population trends and their implications for the future distribution of the species. In this study, we analysed tree-ring growth patterns of Scots pine (Pinus sylvestris L.) populations located at the treeline across a latitudinal gradient covering the northernmost, central and southernmost populations and across an altitudinal gradient at the rear edge of the distribution (higher, central and lowermost populations). Our results show that radial growth trends varied during the last decades in response to a generalised temperature rise, and that different climatic factors are controlling tree growth across the species¿ distribution. Besides the reconstruction of past growth patterns, we created predictive models aimed to forecast future climatic trends basing on current climatic models (ECHAM). These models forecast a general increase in Scots pine growth at treeline and northern-edge populations, whereas an important growth decline are expected at the lowermost populations from the rear-edge of the species¿ distribution. Thus, our results suggest that current alterations in climate differentially affect Scots pine populations, having the capacity to alter current distribution limits.
URIhttp://hdl.handle.net/10261/133162
Appears in Collections:(IRNAS) Comunicaciones congresos
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