Fig. 2From: Tapping the tree-ring archive for studying effects of resin extraction on the growth and climate sensitivity of Scots pineRaw tree-ring chronologies for resin-tapped (black line) and non-tapped Scots pine stands (gray line) in (a) Kratzeburg and (b) Gollin, displayed from 1900 on. Gray shaded areas indicate 30-year periods before and after resin extraction took place. Growth performance of resin-tapped and non-tapped trees was compared for both periods using t-tests; asterisks denote significant (*P < 0.05) and n.s. non-significant differencesBack to article page