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Fig. 4 | Annals of Forest Science

Fig. 4

From: Irreversible diameter change of wood segments correlates with other methods for estimating frost tolerance of living cells in freeze-thaw experiment: a case study with seven urban tree species in Helsinki

Fig. 4

Branch diameter shrinkage during a temperature decrease to −25 °C in winter and early spring for seven taxa. a Mean reversible diameter shrinkage DSreversible and b mean irreversible shrinkage DSirreversible. Reversible and irreversible branch diameter shrinkages are square root transformed (SQR). The bars denote standard error. Differences between seasons were statistically significant: √ DSreversible P = 0.016; √ DSreversible P = 0.0002. Statistically significant differences between species are denoted with different letters in the early spring data (no statistically significant differences between species were found in the winter data)

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Annals of Forest Science

ISSN: 1297-966X