Constraints on transpiration from an evergreen oak tree in southern Portugal

Environmental Drivers of Holocene Forest Development in the Middle Atlas, Morocco

“…However, lack of transpiration blockage can lead to difficulties under prolonged, severe drought (Aussenac, 1984). In contrast, Quercus rotundifolia develops deep rooting structures to access groundwater reserves and maintain high rates of transpiration in combination with stomatal closure under extreme stress (David et al, 2004;Cubera and Moreno, 2007;Vaz et al, 2010). These different strategies leave Cedrus more vulnerable to extended temperature-driven summer drought and low soil moisture.…”

Transpiration of montane Pinus sylvestris L. and Quercus pubescens Willd. forest stands measured with sap flow sensors in NE Spain

“…It is possible, that, given the large radial sap flow gradients in this species, uncertainties derived from averaging sap flow density within the probe (Clearwater et al, 1999) and lack of sensitivity at high sap velocities (Lundblad et al, 2001), might counteract the effects of the abovementioned overestimation of transpiration. For example, David et al (2004) have recently found that the variation in sap flow density in a Quercus rotundifolia Lam. tree did not significantly affect the estimation of whole-tree sap flow.…”

Addressing post-transplant summer water stress in Pinus pinea and Quercus ilex seedlings

“…The ability of both species to adjust physiologically to field conditions will indicate their different degree of acclimation and this may serve to enhance the seedling establishment success rate in reforestation (Gyimah & Nakao 2007, Vallejo et al 2012. Both species need a deep, soft soil, with some plant cover to retain soil moisture (Costa et al 1997, David et al 2004. If the water table is absent and precipitation is scarce, as occurs in the study area, irrigation will partially compensate such water deficit.…”