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Zenodo
2025
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| On-line přístup: | https://doi.org/10.5281/zenodo.15304528 |
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- FIGURE 3 | Legend on next page. FIGURE 3 | Correlations between wood and hydraulic traits of the shoots of the studied Tamarix species and climate variables. SPEI, Standardised Precipitation Evapotranspiration Index; PSDQ, precipitation sum of the driest quarter (the driest three subsequent months of the year; cf. Table 2). 'mean', annual average; 'max-min', differences between the annual maximum and minimum values of the 3 decades considered (1991–2020) or of the values in the growing season (April–September) of that period. Temperature amplitudes and SPEI are based on monthly values. Strongly negative slopes of the logarithmic plot of conduit frequency vs. conduit area (cf. Figure 2) are indicative of a small fraction of wide conduits. dh, hydraulic diameter of the conduits; k ttot, calculated hydraulic conductivity; P50, calculated water potential at the point of 50% loss of hydraulic conductivity. Model parameters of the linear regressions (straight black lines): (a), wood density = −0.708·SPEImean + 0.591, r = −0.763, F = 9.753, p = 0.017; (b), percent conduit area = 0.223·Amplitude temperaturemax-min + 3.249; r = 0.767, F = 9.996, p = 0.016; (c), conduit density = 8.641·PSDQ +37.691, r = 0.883, F = 24.766, p = 0.002; (d), maximum conduit area = −161.291·PSDQ +8273.197, r = −0.800, F = 12.429, p = 0.010; (e), dh = −1.095·PSDQ +78.134, r = −0.895, F = 28.061, p = 0.001; (f), slope log(conduit distribution) = −0.0139·PSDQ—0.167, r = −0.957, F = 75.723, p <0.001; (g), kttot = −12.949· PSDQ +403.783, r = −0.804, F = 12.776, p = 0.009; (h), P50 = −6.798 · ∆SPEImax-min(Apr—Sep) + 11.745, r = −0.761, F = 9.638, p = 0.017, T. ramosissima (NW China);, T. aphylla (Israel);, T. negevensis (Israel);, T. nilotica (Israel);, T. hispida (Uzbekistan);, T. boveana;, T. gallica (both from southern Spain).