Effects of stand composition and tree size on resistance and resilience to drought in sessile oak and Scots pine

Merlin, Morgane; Pérot, Thomas; Perret, Sandrine; Korboulewsky, Nathalie; Vallet, Patrick

doi:10.1016/j.foreco.2014.11.032

Cited by 192 publications

(136 citation statements)

References 72 publications

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“…Additionally, soil moisture availability often increases postthinning due to reduced stand-level transpiration and increased canopy throughfall (Aussenac and Granier 1988;. Unlike previous studies quantifying the impact of density on drought response of coniferous (e.g., Mission et al 2003;D'Amato et al 2013) and deciduous broadleaved forest tree species (e.g., Merlin et al 2015), we found a very limited effect of density on various drought indices. The decreased resistance of black oak at progressively greater RD observed during the first drought partially supports our hypothesis regarding density and tree growth during drought.…”

Section: Discussioncontrasting

confidence: 93%

“…Although size-modulating effects on drought response are less abundant for deciduous broadleaved tree species than for coniferous species, the seemingly minor and inconsistent influence of stem size on drought tolerance aligns with previous research results. For example, the effect of increasing stem size on growth during and after drought has been shown to be insignificant (Mérian and Lebourgeois 2011;Zang et al 2012), positive (Orwig andAbrams 1997;Merlin et al 2015), and negative (Merlin et al 2015) for North American and European oak species, including black, white, sessile (Quercus petraea (Matt.) Liebl.…”

Section: Discussionmentioning

confidence: 99%

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Drought response of upland oak (Quercus L.) species in Appalachian hardwood forests of the southeastern USA

Keyser

Brown

2016

Annals of Forest Science

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Abstract& Key message In Appalachian hardwood forests, density, stem size, and productivity affected growth during drought for red oak, but not white oak species. Minor effects of density suggest that a single low thinning does little to promote drought resilience for oaks in the region. & Context Management is increasingly focused on promoting resilience to disturbance. Because stand density can modulate climate-growth relationships, thinning may be an adaptation strategy that promotes resistance/resilience to drought. & Aims We examined how density, manipulated via thinning, stem size, and site productivity, influences the drought response of northern red, black, chestnut, and white oak. & Methods We modeled the role of density, stem size, and site productivity on resistance, recovery, and resilience during two drought events. & Results Chestnut and white oak displayed greater resistance, recovery, and/or resilience than did northern red and black oak. For black oak, density and stem size negatively affected resistance during the first and second drought, respectively. Density, stem size, and site productivity had no effect on chestnut and white oak. & Conclusion The lack of sensitivity of chestnut and white oak to the ranges of density, stem size, and site productivity observed in this study and generally better resistance, recovery, and resilience suggests that management focused on the maintenance of these species, as opposed to a single silvicultural low thinning, may be a possible strategy for sustaining the growth and productivity of oak species in Appalachian hardwood stands. Drought response as affected by alternative thinning interventions should be evaluated.

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Section: Discussioncontrasting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Drought response of upland oak (Quercus L.) species in Appalachian hardwood forests of the southeastern USA

Keyser

Brown

2016

Annals of Forest Science

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“…However, the potential benefit of mixing reducing the sensitivity to drought events in comparison with pure stands depends on species composition and sites. Studies have reported positive (Lebourgeois et al 2013;Pretzsch et al 2013b), neutral (Jucker et al 2014;Merlin et al 2015), or even negative effects (Grossiord et al 2014). It is therefore crucial to further explore the spatial and temporal variation of overyielding in Scots pine-European beech forest in order to determine the potential of this mixture in the face of climate change.…”

Section: Discussionmentioning

confidence: 99%

Growth and yield of mixed versus pure stands of Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) analysed along a productivity gradient through Europe

Rı́o²,

et al. 2015

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Mixing of complementary tree species may increase stand productivity, mitigate the effects of drought and other risks, and pave the way to forest production systems which may be more resource-use efficient and stable in the face of climate change. However, systematic empirical studies on mixing effects are still missing for many commercially important and widespread species combinations. Here we studied the growth of Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) in mixed versus pure stands on 32 triplets located along a productivity gradient through Europe, reaching from Sweden to Bulgaria and from Spain to the Ukraine. Stand inventory and taking increment cores on the mainly 60-80 year-old trees and 0.02-1.55 ha sized, fully stocked plots provided insight how species mixing modifies the structure, dynamics and productivity compared with neighbouring pure stands. In mixture standing volume (?12 %), stand density (?20 %), basal area growth (?12 %), and stand volume growth (?8 %) were higher Communicated by Peter Biber. than the weighted mean of the neighbouring pure stands. Scots pine and European beech contributed rather equally to the overyielding and overdensity. In mixed stands mean diameter (?20 %) and height (?6 %) of Scots pine was ahead, while both diameter and height growth of European beech were behind (-8 %). The overyielding and overdensity were independent of the site index, the stand growth and yield, and climatic variables despite the wide variation in precipitation (520-1175 mm year -1 ), mean annual temperature (6-10.5°C), and the drought index by de Martonne (28-61 mm°C -1 ) on the sites. Therefore, this species combination is potentially useful for increasing productivity across a wide range of site and climatic conditions. Given the significant overyielding of stand basal area growth but the absence of any relationship with site index and climatic variables, we hypothesize that the overyielding and overdensity results from several different types of interactions (light-, water-, and nutrient-related) that are all important in different circumstances. We discuss the relevance of the results for ecological theory and for the ongoing silvicultural transition from pure to mixed stands and their adaptation to climate change. Electronic supplementary material

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“…Gridded drought indices have been widely used in a variety of systems to identify drought impacts, including tree morbidity and mortality at various spatial scales [43,44], crop yield reductions and crop failures [45], forest fires [46,47], and decreased vegetation activity [48,49]. The developed …”

Section: Data Use and Applicationmentioning

confidence: 99%

A High Resolution Dataset of Drought Indices for Spain

Vicente‐Serrano

Tomás-Burguera

Beguerı́a

et al. 2017

Data

141

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Drought indices are essential metrics for quantifying drought severity and identifying possible changes in the frequency and duration of drought hazards. In this study, we developed a new high spatial resolution dataset of drought indices covering all of Spain. The dataset includes seven drought indices, spans the period 1961-2014, and has a spatial resolution of 1.1 km and a weekly temporal resolution. A web portal has been created to enable download and visualization of the data. The data can be downloaded as single gridded points for each drought index, but the entire drought index dataset can also be downloaded in netCDF4 format. The dataset will be updated for complete years as the raw meteorological data become available.

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Effects of stand composition and tree size on resistance and resilience to drought in sessile oak and Scots pine

Cited by 192 publications

References 72 publications

Drought response of upland oak (Quercus L.) species in Appalachian hardwood forests of the southeastern USA

Drought response of upland oak (Quercus L.) species in Appalachian hardwood forests of the southeastern USA

Growth and yield of mixed versus pure stands of Scots pine (Pinus sylvestris L.) and European beech (Fagus sylvatica L.) analysed along a productivity gradient through Europe

A High Resolution Dataset of Drought Indices for Spain

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