Response of diameter and height increment to thinning in oak-hornbeam coppice in the southeastern part of the Czech Republic

Fedorová, Barbora; Kadavý, Jan; Adamec, Zdeněk; Kneifl, Michal; Knott, Robert

doi:10.17221/13/2016-jfs

Cited by 11 publications

(5 citation statements)

References 29 publications

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“… Darenova et al (2018b) measured SWC in the profile of 0–6 cm on the same plots during several campaigns in 2015 and 2016 and observed a slightly higher SWC on T-0 compared to C-0 and lower SWC on both throughfall reduction plots (up to about 5 %). A positive effect of thinning on soil moisture was also confirmed by Fedorová et al (2018) at depths of 5, 10, 20, 30 and 40 cm on the same plots in 2015 as well as by del Campo et al (2019) in a holm oak coppice forest.…”

Section: Discussionsupporting

confidence: 52%

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Does lower water availability limit stem CO2 efflux of oak and hornbeam coppices?

Darenova,

Knott,

Vichta

2024

AoB PLANTS

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Recent changes in water availability can be crucial for the development, growth, and carbon budget of forests. Therefore, our aim was to determine the effect of reduced throughfall and severe summer drought on stem CO2 efflux as a function of temperature and stem increment. Stem CO2 efflux was measured using the chamber method on oak and hornbeam under four treatments: coppice, thinned-coppice, and both coppice and thinned-coppice with 30%-reduced throughfall. The first year of the experiment had favourable soil water availability and the second year was characterized by a dry summer. While reduced throughfall had no effect on stem CO2 efflux, the summer drought decreased efflux by 43-81% during July and August. The stem CO2 efflux was reduced less severely (by 13-40%) in September when the drought persisted but the stem increment was already negligible. The stem increment was also strongly affected by the drought, which was reflected in its paired relationship with stem CO2 efflux over the two experimental years. The study showed that summer dry periods significantly and rapidly reduce stem CO2 efflux, whereas a constant 30% rainfall reduction needs probably a longer time to affect stem properties, and indirectly stem CO2 efflux.

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Section: Discussionsupporting

confidence: 52%

“…(2011) because of the high variability among the individual sprouts. Nevertheless, a significantly higher stem increment was observed in the first year (2015) after the treatment in both species by Fedorová et al (2018) . Moreover, the summer drought in 2017 severely limited the coppice growth regardless of treatment.…”

Section: Discussionmentioning

confidence: 85%

Does lower water availability limit stem CO2 efflux of oak and hornbeam coppices?

Darenova,

Knott,

Vichta

2024

AoB PLANTS

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“…Average thinning intensity is preferred by visitors, compared to very dense stands (Jensen & Skovsgaard 2009) and thus improve the recreation value of urban forests. 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).…”

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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“…However, the dynamics and relationship between periodic annual height growth and stand density following thinning are complex [45,46]. Some studies have suggested that height growth and total height are relatively unaffected by thinning [29,[47][48][49][50]. On the other hand, other studies have observed thinning to have an obvious effect on tree height growth, especially at very high thinning intensities [27,[51][52][53][54][55].…”

Section: Introductionmentioning

confidence: 99%

“…In general, no matter how thinning affects diameter and height growth, it may be reasonable to expect that the allometric relationship of tree height and diameter will be different in thinned and unthinned stands. However, most existing studies on the influence of thinning on tree growth have often focused on how thinning affects tree height and diameter increments and have analyzed these two parameters separately [27,29,43,49,52]. We can only approximately deduce the influence of thinning on the tree height-diameter ratio from increment measurements, and we cannot obtain a detailed and accurate dynamic process of tree height-diameter allometry.…”

Section: Introductionmentioning

confidence: 99%

Thinning Effects on the Tree Height–Diameter Allometry of Masson Pine (Pinus massoniana Lamb.)

Deng

Zhang

et al. 2019

Forests

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The stem height–diameter allometric relationship is fundamental in determining forest and ecosystem structures as well as in estimating tree volume, biomass, and carbon stocks. Understanding the effects of silvicultural practices on tree height–diameter allometry is necessary for sustainable forest management, though the impact of measures such as thinning on the allometric relationship remain understudied. In the present study, the effects of thinning on tree height–diameter allometry were evaluated using Masson pine height and diameter growth data from a plantation experiment that included unthinned and thinned treatments with different intensities. To determine whether thinning altered the height–diameter allometry rhythm, the optimal height–diameter model was identified and dummy variable methods were used to investigate the differences among model parameters for different thinning treatments. Periodic (annual) allometric coefficients were calculated based on height and diameter increment data and were modeled using the generalized additive mixed model (GAMM) to further illustrate the response of tree height–diameter allometry to different thinning treatments over time. Significant differences were detected among the parameters of the optimal height–diameter model (power function) for different thinning treatments, which indicated that the pattern of the height–diameter allometry relationship of Masson pine was indeed altered by thinning treatments. Results also indicated a nonlinear trend in the allometric relationship through time which was significantly affected by thinning. The height–diameter allometric coefficient exhibited a unimodal convex bell curve with time in unthinned plots, and thinning significantly interfered with the original trend of the height–diameter allometric coefficient. Thinning caused trees to increase diameter growth at the expense of height growth, resulting in a decrease of the ratio of tree height to diameter, and this trend was more obvious as the thinning intensity increased.

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Response of diameter and height increment to thinning in oak-hornbeam coppice in the southeastern part of the Czech Republic

Cited by 11 publications

References 29 publications

Does lower water availability limit stem CO2 efflux of oak and hornbeam coppices?

Does lower water availability limit stem CO2 efflux of oak and hornbeam coppices?

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

Thinning Effects on the Tree Height–Diameter Allometry of Masson Pine (Pinus massoniana Lamb.)

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