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. 2015 Sep 7;6:703. doi: 10.3389/fpls.2015.00703

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Copyright © 2015 Oberhuber, Hammerle and Kofler.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Moving correlations (window 30 days) between the water deficit (ΔW) (A–C), MDS (D–F) and growth (G–I), and environmental variables of saplings (open symbols) and mature Picea abies (filled symbols). Spearman rank-correlations (ρ) were calculated for relationships between (i) precipitation and ΔW, MDS, and growth, and (ii) all environmental variables and growth. For all other relationships the Pearson product-moment coefficients (r) are shown (Prec, daily precipitation sum; VPD, vapor pressure deficit; RH, relative air humidity; T_max, daily maximum air temperature; SWC, soil water content; T_soil, mean soil temperature). A lag of 1 day was considered in the relationship between ΔW, MDS, and growth, and SWC and T_soil. Horizontal dotted and dashed lines indicate P = 0.001 and P = 0.05 significance levels, respectively.