Comparative cambial dynamics and phenology of Quercus robur L. and Q. pyrenaica Willd. in an Atlantic forest of the northwestern Iberian Peninsula

González-González, Borja D.; García‐González, Ignacio; Vázquez‐Ruiz, Rosa Ana

doi:10.1007/s00468-013-0905-x

Cited by 49 publications

(43 citation statements)

References 59 publications

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“…The differences in age and size among individuals (Table 1) were likely reasons for a higher variability in cambial activity in our study trees. In addition, we observed a higher variability in the number of cambial cells later in the growing season than other authors (Gričar 2008(Gričar , 2010González-González et al 2013a). A decrease in the number of cambial cell layers in May (Fig.…”

Section: Xylogenesis During the 2014 Growing Seasonsupporting

confidence: 48%

“…At the end of September, the latest formed xylem cells were still developing in most individuals, and the number of cambial cells decreased to 7-8 layers. In the Atlantic region of Spain, such values were reported for the dormant cambium in Pedunculate oak (González-González et al 2013a). In our study, the number of cambial cells varied from 5 to 6 layers and tree-rings were completed in mid-October in all study trees.…”

Section: Xylogenesis During the 2014 Growing Seasonmentioning

confidence: 74%

“…4). The differences in the number of cell layers in the cambium were bigger than in oaks in the Iberian Peninsula (González-González et al 2013a). The differences in age and size among individuals (Table 1) were likely reasons for a higher variability in cambial activity in our study trees.…”

Section: Xylogenesis During the 2014 Growing Seasonmentioning

confidence: 92%

“…(Color figure online) petraea (Akkemik et al 2006), where the difference in dormancy breaking between two vegetation seasons was about 1 month. In the time of the highest divisional activity at the beginning of the vegetation season, 12-13 cambial cell layers were observed in Pedunculate oak (González-González et al 2013a), and in 9-11 cell layers in sessile oak (Gričar 2008;2010). In the study trees, we observed 7-13 cambial cell layers when the first row of earlywood vessels was formed before bud break (Fig.…”

Section: Xylogenesis During the 2014 Growing Seasonmentioning

confidence: 99%

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Does tree-ring formation follow leaf phenology in Pedunculate oak (Quercus robur L.)?

et al. 2017

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We monitored leaf phenology and xylogenesis of 12 Pedunculate oaks in northern Poland in 2014. We hypothesized that the individual trees, which differed in size, age and habitat (tree stand or gap), also diverged in terms of the seasonal patterns of leaf phenology and xylogenesis. The samples used for wood formation observations were collected most frequently during the early leaf phenophases (from March to end of June). The transverse sections of the cambial region were cut with a sledge microtome. We counted the number of cambial cells, measured the width of xylem increment and assessed the timing of xylogenesis and earlywood-vessel formation. We found significant differences in leaf phenology and timing of xylogenesis among individual trees. The smallest differences in wood formation among the trees were observed at the beginning of the vegetation season when the first earlywood vessels were detected (9 days). The dates of completion of the first tangential row of earlywood vessels varied by up to 30 days, while for the completion of the entire earlywood dates varied by up to 32 days. The highest productivity of cambial cells (13 cell layers) was observed around the time of bud swelling at mid-April. In the last days of April, the number of cambial cell layers decreased and subsequently increased again when the leaves were nearly fully expanded at the end of May. To summarize, we observed a high seasonal variability in the number of cambial cell layers. Differences in the time of cessation of cambial activity and xylogenesis amounted to 1 month. We conclude that: (1) oak tree-ring widths and earlywoodvessel sizes and numbers may not be sensitive indicators for early spring temperature and spring defoliation; (2) the missing association between leaf phenophases and xylogenesis as well as the phenological variability may be the reasons for the lack of a clear climatic effect on the abovementioned parameters.

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Section: Xylogenesis During the 2014 Growing Seasonsupporting

confidence: 48%

Section: Xylogenesis During the 2014 Growing Seasonmentioning

confidence: 74%

Section: Xylogenesis During the 2014 Growing Seasonmentioning

confidence: 92%

Section: Xylogenesis During the 2014 Growing Seasonmentioning

confidence: 99%

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Does tree-ring formation follow leaf phenology in Pedunculate oak (Quercus robur L.)?

et al. 2017

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“…Hence, xylogenesis begins prior to budburst in ring-porous trees. In certain ring-porous species (deciduous oaks), the onset of cambial division is the first step of spring resumption (Gričar 2010;González-González et al 2013), whereas in others (e.g., Fraxinus excelsior), overwintering vessels start to enlarge before budburst (SassKlaassen et al 2011) and cambial division is resumed after budburst (Frankenstein et al 2005). In conifers, the resumption of cambium activity generally occurs before budburst (Rossi et al 2009;Gruber et al 2010;Cuny et al 2012;Michelot et al 2012;Huang et al 2014).…”

Section: Integrated Phenology At the Tree Scalementioning

confidence: 99%

Temperate and boreal forest tree phenology: from organ-scale processes to terrestrial ecosystem models

Delpierre

Vitasse

Chuine

et al. 2016

Annals of Forest Science

217

192

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Abstract& Key message We demonstrate that, beyond leaf phenology, the phenological cycles of wood and fine roots present clear responses to environmental drivers in temperate and boreal trees. These drivers should be included in terrestrial ecosystem models. & Context In temperate and boreal trees, a dormancy period prevents organ development during adverse climatic conditions. Whereas the phenology of leaves and flowers has received considerable attention, to date, little is known regarding the phenology of other tree organs such as wood, fine roots, fruits, and reserve compounds. & Aims Here, we review both the role of environmental drivers in determining the phenology of tree organs and the models used to predict the phenology of tree organs in temperate and boreal forest trees. & Results Temperature is a key driver of the resumption of tree activity in spring, although its specific effects vary among organs. There is no such clear dominant environmental cue involved in the cessation of tree activity in autumn and in the onset of dormancy, but temperature, photoperiod, and water stress appear as prominent factors. The phenology of a given organ is, to a certain extent, influenced by processes in distant organs. & Conclusion Inferring past trends and predicting future trends of tree phenology in a changing climate requires specific phenological models developed for each organ to consider the phenological cycle as an ensemble in which the environmental cues that trigger each phase are also indirectly involved in the subsequent phases. Incorporating such models into terrestrial ecosystem models (TEMs) would likely improve the accuracy of their predictions. The extent to which the coordination of the phenologies of tree organs will be affected in a changing climate deserves further research.

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Limits and Strengths of Tree-Ring Stable Isotopes

et al. 2022

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This chapter aims at summarizing strengths and caveats on the suitability of stable carbon and oxygen isotopes in tree rings as recorders for fingerprints of environmental influences. First, environmental constraints limiting tree growth and shaping tree species distribution worldwide are discussed. Second, examples are presented for environmental conditions under which tree-ring isotopes record environmental signals particularly well, but also cases where physiological processes can mask climate signals. Third, the link between leaf-level carbon assimilation and the investment of assimilates in the stem during the annual ring formation are discussed in light of the resulting deviations of the isotopic values between leaves and tree rings. Finally, difficulties and pitfalls in the interpretation of stable isotope signals in tree rings are reviewed. These problems often result from a poor understanding of when and how the tree canopy, stems and roots are physiologically interconnected. Current literature suggests that photosynthesis and radial growth are only loosely coupled, if at all, challenging the interpretation of environmental signals recorded in tree-ring isotopes. Harsh environmental conditions (e.g. low temperatures, drought) often result in a decoupling of carbon assimilation and growth. The chapter closes by providing possible solutions on how to improve the detection of environmental information from stable isotope signals by integrating scales and different methodological approaches.

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Comparative cambial dynamics and phenology of Quercus robur L. and Q. pyrenaica Willd. in an Atlantic forest of the northwestern Iberian Peninsula

Cited by 49 publications

References 59 publications

Does tree-ring formation follow leaf phenology in Pedunculate oak (Quercus robur L.)?

Does tree-ring formation follow leaf phenology in Pedunculate oak (Quercus robur L.)?

Temperate and boreal forest tree phenology: from organ-scale processes to terrestrial ecosystem models

Limits and Strengths of Tree-Ring Stable Isotopes

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