Earlywood vessels of the sub-Mediterranean oak Quercus pyrenaica have greater plasticity and sensitivity than those of the temperate Q. petraea at the Atlantic–Mediterranean boundary

A novel computer-aided tree-ring analysis software (CATS): oak earlywood vessel size reveals a clear spring heat sum response

“…et al 2016), in winter-spring (Tumajer and Treml 2016) as well as a negative precipitation signal during the autumnwinter period (González-González et al 2015). Studies of other Quercus species often reveal a clear response to precipitation (e.g., Fonti et al 2009;González-González et al 2014). Our findings agree with the studies showing a direct positive correlation of temperature and earlywood vessel size during the time of formation in spring.…”

“…Our findings agree with the studies showing a direct positive correlation of temperature and earlywood vessel size during the time of formation in spring. Several physiological explanations of vessel-temperature interactions have been discussed in other publications (e.g., Aloni 2015;González-González et al 2014;Pritzkow et al 2016). An influence of stem temperature reaching a threshold of 5°C with a delay of 1-2 weeks before cambial activity begins has been reported by Güney et al (2016) in Lebanon cedar and Kudo et al (2014) found that cambial reactivation in the ring-porous hardwood Quercus serrata is triggered mainly by temperature.…”

Defining ecologically relevant vessel parameters in Quercus robur L. for use in dendroecology: a pointer year and recovery time case study in Central Germany

“…The earlywood vessels ([6000 lm 2 , Fonti et al 2009) were measured and used to derive an array of features (Table 2), including mean vessel area (MVA), largest vessel area (MAX) and total vessel area (TVA, accumulated area of all vessel lumina). Since previous studies found a stronger signal from the vessels of the first row (García-González and Fonti 2008;González-González et al 2014), these three parameters were applied (1) to all earlywood vessels, (2) only to the first row of earlywood vessels (row) and (3) to the earlywood vessels excluding the first row (rest). Furthermore, the number of vessels (NV), the vessel density (VD), the total vessel area as a percentage of the treering area (TVA%), the mean maximum area of the largest three and five vessels, and of the widest 25 % vessels (MAX3, MAX5, MAX25%, respectively), of all earlywood vessels were measured.…”

“…Vessel density and conductive area were often jointly analyzed (Alla and Camarero 2012;Corcuera et al 2004a;Pumijumnong and Park 1999). In most studies, 2-3 parameters were analyzed; only a few studies used a range of vessel-based features (Galle et al 2010;González-González et al 2014). Although a very large range of parameters are potentially available, the most frequently used ones refer only to the wide earlywood vessels for two main reasons: they make the largest contribution to water transport , making them crucial to plant survival; and they have been shown to be the most responsive to environmental conditions.…”

Dendroclimatic responses of four European broadleaved tree species near their south-western range edges

“…However, higher water demand, caused by a reduction in rainfall or an increase in temperature, is not the only climatic stress for trees growing near their range edges. Temperate trees suffer from additional stress sources at the transitional areas between Atlantic and Mediterranean regions revealing a more complex picture (González-González et al, 2014). For example, high levels of precipitation combined with relatively high winter temperatures has been shown to be the main cause for growth reduction and dieback of Q. robur in the north-western Iberian Peninsula (Rozas & García-González, 2012).…”