Decreasing stand density favors resistance, resilience, and recovery of Quercus petraea trees to a severe drought, particularly on dry sites

Schmitt, Anna; Trouvé, Raphaël; Seynave, Ingrid; Lebourgeois, François

doi:10.1007/s13595-020-00959-9

Cited by 19 publications

(6 citation statements)

References 85 publications

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“…Tree size, species, competition, and magnitude and duration of drought influence resistance, recovery, and resilience of stands to drought (Sohn et al, 2016;Schmitt et al, 2020;Steckel et al, FIGURE 7 | Effects of tree size (A,C) and aspen basal area (B,D) on white spruce resistance (Rt) and resilience (Rs) in 2013. Aw_baha = aspen basal area (m 2 ha −1 ) and ba_b = initial tree size (m 2 ).…”

Section: Does Thinning Influence Resistance Recovery and Resilience Of These Stands To Drought?mentioning

confidence: 99%

Effects of Thinning on Dynamics and Drought Resistance of Aspen-White Spruce Mixtures: Results From Two Study Sites in Saskatchewan

Comeau

2021

Front. For. Glob. Change

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Drought stress associated with warm temperatures is causing increased mortality and reduced growth of trees in drier portions of the boreal forests of western Canada with both warming and drought expected to increase over the coming decades. While thinning is often shown to reduce drought stress, there is little information on its effects in stands comprised of mixtures of trembling aspen and white spruce that are common in the forests of this region. This study examined effects of pre-commercial thinning on aspen and spruce growth, response to drought stress, and stand dynamics for two study sites located in Saskatchewan, Canada. In unthinned plots aspen densities declined from initial densities of 40,000 to 200,000 trees ha−1 to 2,639 trees ha−1 at age 26. Twenty-one years after thinning (i.e., at age 26) diameter of aspen and spruce had increased, with largest trees being found at the lowest aspen densities (200 aspen ha−1 for aspen and 0 aspen ha−1 for spruce). Aspen density affected average height but not height of aspen top height trees. Spruce height decreased significantly with increasing aspen density. Crown width and live crown ratio of both aspen and spruce declined with increasing aspen density. Data from cores collected from aspen and spruce indicate significant positive effects of tree size (basal area at beginning of the year), and CMI (Climate Moisture Index) on basal area increment of both aspen and spruce while increasing aspen basal area (m2ha−1) had negative effects on aspen and spruce growth. Increasing tree size (basal area) and aspen competition (basal area ha−1) both had negative effects on drought resistance and resilience for both aspen and spruce. Yield projections provided by the Mixedwood Growth Model (MGM) suggest that the mixture of 1,500 aspen ha−1 and 1,000 spruce ha−1 has the potential to provide a 23% increase in total mean annual increment (MAI) with a single harvest at age 100, compared to unthinned aspen stands, but with a 44% reduction in spruce MAI compared to pure spruce stands. Thinning of aspen to densities below 4,000 trees ha−1 at age 5 resulted in reduced aspen yields but increased spruce yields.

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Section: Does Thinning Influence Resistance Recovery and Resilience Of These Stands To Drought?mentioning

confidence: 99%

Effects of Thinning on Dynamics and Drought Resistance of Aspen-White Spruce Mixtures: Results From Two Study Sites in Saskatchewan

Comeau

2021

Front. For. Glob. Change

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“…After-stress effects are more uncertain, and published results are heterogeneous and somewhat contradictory (see meta-analyses in Sohn et al, 2016 andCastagneri et al, 2021). Resilience increased in general after thinning (Sohn et al, 2016;Navarro-Cerillo et al, 2019;Schmitt et al, 2020;Lucas-Borja et al, 2021), although Castagneri (2021) did not found consistent results. A higher heterogeneity is reported for growth recovery.…”

Section: Thinning Decreased Drought Vulnerabilitymentioning

confidence: 99%

Long-term effects of forest management on post-drought growth resilience: An analytical framework

Manrique‐Alba

Beguerı́a

Camarero

2022

Science of The Total Environment

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“…Q. petraea stands in Czech Republic responded well to thinning with a clear effect on diameter increment, less on height increment (Fedorová et al 2016). Thinning has been shown to reduce adverse effects of droughts and increases drought resistance of Q. petraea in France (Breda et al 1995, Schmitt et al 2020). Survival of sessile oak growing in Hungary was found to be moderately increased after thinning, with even stronger positive effects for coexisting Carpinus betulus L., the European hornbeam (Tinya et al 2020).…”

Section: )mentioning

confidence: 99%

Thinning Response and Potential Basal Area in a Mixed Sub-humid Low-elevation Oak-Hornbeam Forest

Neumann¹,

Hasenauer²

2021

Preprint

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Competition for resources (light, water, nutrients, etc.) limits the size and abundance of alive trees a site can support. This carrying capacity determines the potential carbon sequestration in alive trees as well as the maximum growing stock. Lower stocking through thinning can change growth and mortality. We were interested in the relations between stand structure, increment and mortality using a long-unmanaged oak-hornbeam forest near Vienna, Austria, as case study. We expected lower increment for heavy thinned compared to unmanaged stands. We tested the thinning response using three permanent growth plots, whereas two were thinned (50% and 70% basal area removed) and one remained unmanaged. We calculated stand structure (basal area, stem density, diameter distribution) and increment and mortality of single trees. The heavy thinned stand had over ten years similar increment as the moderate thinned and unthinned stands. Basal area of the unthinned stand remained constant and stem density decreased due to competition-related mortality. The studied oak-hornbeam stands responded well even to late and heavy thinning suggesting a broad “plateau” of stocking and increment for these forest types. Lower stem density for thinned stands lead to much larger tree increment of single trees, compared to the unthinned reference. The findings of this study need verification for other soil and climatic conditions.

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Decreasing stand density favors resistance, resilience, and recovery of Quercus petraea trees to a severe drought, particularly on dry sites

Cited by 19 publications

References 85 publications

Effects of Thinning on Dynamics and Drought Resistance of Aspen-White Spruce Mixtures: Results From Two Study Sites in Saskatchewan

Effects of Thinning on Dynamics and Drought Resistance of Aspen-White Spruce Mixtures: Results From Two Study Sites in Saskatchewan

Long-term effects of forest management on post-drought growth resilience: An analytical framework

Thinning Response and Potential Basal Area in a Mixed Sub-humid Low-elevation Oak-Hornbeam Forest

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