Climatic impact on tree-ring widths in abies borisii-regis forests from south-east Albania

  • Pasho E
  • Toromani E
  • Alla A
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Abstract

The long-term radial growth responses to drought and climatic variability of less-studied species such as Abies borisii-regis (Mattf.) remain poorly understood. We tested the hypothesis that severe short-term drought conditions during summer months will impact the radial growth of A. borisii-regis (Mattf.) trees and such impact will have a more pronounced effect on latewood (LW) than earlywood (EW) width. Correlation analysis was employed to investigate the impact of climatic drivers (temperature, precipitation) and drought, using the Standardized Precipitation Evapotranspiration Index (SPEI) calculated at cumulative time scales (1-12 months), on EW, LW and tree-ring width (TRW) in A. borisii-regis (Mattf.) trees from South-Eastern Albania. We found that EW width was positively correlated with precipitation in July and previous September, while the LW width and TRW was enhanced by the current June-July precipitation. Previous autumn and current summer high temperatures constrained the radial growth in A. borisii-regis (Mattf.) trees, particularly the LW and TRW. All the tree-ring widths components showed the highest significant response to drought at short cumulative time scales (

Author-supplied keywords

  • Abies borisii-regis
  • Climate
  • Correlations
  • Drought
  • Radial growth

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