Spring-Summer Drought Induces Extremely Low Radial Growth Reactions in North-Tyrrhenian Pinus pinea L.

Piraino, Sergio; Roig, Fidel A.

doi:10.1590/2179-8087.030318

Floresta Ambient.

2020

DOI: 10.1590/2179-8087.030318

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Spring-Summer Drought Induces Extremely Low Radial Growth Reactions in North-Tyrrhenian Pinus pinea L.

Sergio Piraino

Fidel A. Roig

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Cited by 2 publications

References 27 publications

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Electing drought-resistant pinus pinea L. (stone pine) using dendroclimatology

Карпухин

Yussef

2021

IOP Conf. Ser.: Earth Environ. Sci.

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The purpose of this study is to determine the exceptional dry years of Pinus pinea L. (stone pine) by using dendroclimatology, and Selection drought-resistant trees depending on the differentiation in the width of the annual growth rings of exceptional dry years and adopting them as seed mothers. Method. Sixteen samples were taken from four different sites (A, B, C, and D) (four samples per site). Cores were extracted from 10 trees per sample and the transverse surfaces of all cores were smoothed to expose the tree rings. Cores were then scanned and annual ring widths were measured from 2019 to 2005 using ScopeImage Plus software. By using the Moving Average as a smoothing technique, the exceptional years of the time series for the width of the annual growth rings for each sample were determined. More specifically, results show that 2008 and 2014 are negatively exceptional years across all the sites. Furthermore, the correlation coefficients between the ring-widths, the annual precipitation, and temperature for each site show that the annual precipitation is the determinant of the occurrence of exceptional years and that 2008 and 2014 are the dry years in our chosen sites. When comparing the ring widths of the dry years, it was noticed that tress (Aa4, Ab6, Ac9, Ad2) in the site A, (Ba10, Bb1, Bc3, Bd1) in the site B, (Ca9, Cb5, Cc8, Cd1) in the site C and (Da1, Db3, Dc7, Dd3) in the site D are superior and have wide rings. Scientific novels. According to this study, these trees can be selected as drought-resistant and adopted as seeds mothers which can be used in the propagation of Pinus pinea.

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Electing drought-resistant pinus pinea L. (stone pine) using dendroclimatology

Карпухин

Yussef

2021

IOP Conf. Ser.: Earth Environ. Sci.

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Differential Tree Growth Response to Management History and Climate in Multi-Aged Stands of Pinus pinea L.

Garfì,

Garfì

2023

Plants

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The possible differential response to the climatic fluctuations of co-occurring trees of different ages is still poorly known and rather controversial. Moreover, in managed forests, such a picture is further complicated by the impact of silvicultural practices. With this concern, in a multi-aged umbrella pine stand in the Maremma Regional Park (Tuscany, Italy), the spatial patterns and tree-ring response to the climate were investigated by differentiating trees into three classes, i.e., young, mature, and old. The aim was to assess the role of past management in shaping the current stand structure and affecting the growth dynamics at different ages, as well as to evaluate the possible shifting of tree adaptation to the climatic variables throughout plant aging. Our outcomes proved that the current mosaic of even-aged small patches results from a multifaceted forest management history. Until the 1960s, silvicultural treatments seemed more suitable in promoting tree growth and regeneration. Later on, inappropriate and/or untimely thinning probably triggered excessive competition from the top canopy trees, involving reduced stem and root system development in the younger plants living in the understory. Also, the intra-annual growth response to the climate showed some dependence on age. Younger trees are assumed not to be able to efficiently exploit water resources from the deep aquifer during the dry season, probably due to an insufficiently developed taproot, differently than older trees. Accordingly, appropriate and timely thinning, simulating frequent natural disturbances on small areas, could be a suitable management approach to promote sustained growth rates and regeneration processes, as well as healthy and vital trees at all life stages.

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Spring-Summer Drought Induces Extremely Low Radial Growth Reactions in North-Tyrrhenian Pinus pinea L.

Cited by 2 publications

References 27 publications

Electing drought-resistant pinus pinea L. (stone pine) using dendroclimatology

Electing drought-resistant pinus pinea L. (stone pine) using dendroclimatology

Differential Tree Growth Response to Management History and Climate in Multi-Aged Stands of Pinus pinea L.

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