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Fig. 3 | Annals of Forest Science

Fig. 3

From: Estimating gap age using tree-ring width in combination with carbon isotope discrimination in a temperate forest, Northeast China

Fig. 3

The ∆13C of sample and control trees for Ulmus laciniata, Fraxinus rhynchophylla, and Juglans mandshurica in 2-year intervals. Different capital and lowercase letters indicated significant differences (p < 0.05) of mean ∆13C between different intervals for control trees and sample trees, respectively. Asterisk and “ns” indicated significant differences (p < 0.05) or insignificant differences of mean ∆13C between sample and control trees for the same interval, respectively

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