Dead wood carbon density for the main tree species in the Lithuanian hemiboreal forest

Stakėnas, Vidas; Varnagirytė–Kabašinskiene, Iveta; Sirgedaitė-Šėžienė, Vaida; Armolaitis, Kęstutis; Araminienė, Valda; Muraškienė, Milda; Žemaitis, Povilas

doi:10.1007/s10342-020-01306-3

Cited by 12 publications

(7 citation statements)

References 35 publications

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“…In the study of the coarse woody debris in Estonia was concluded that the basic density decreases from 426.9 kg m −3 for recently died stems to 124.8 kg m -3 for almost decomposed grey alder stems (Köster et al, 2015). The results obtained in Lithuanian study showed that the mean basic density decreased from 400 kg m -3 at the beginning of the decomposition processes to 110 kg m -3 in almost decomposed grey alder wood (Stakėnas et al, 2020). In our study, the lowest basic density of a spongy rot wood sample was 71.4 kg m -3 .…”

Section: Resultsmentioning

confidence: 92%

Reduction of Wood Basic Density in Decayed Grey Alder Stems

Liepiņš

Bleive

Lazdiņš

et al. 2022

Rural Development 2019

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This pilot study aims to estimate the impact of the internal stem decay on wood basic density in grey alder stems. Accurate estimates of stem biomass are crucial in reducing the uncertainty in the estimation of forest stand biomass. The density data were obtained from 21 decayed trees and from 15 healthy trees as reference sampled in five forest stands in Latvia. In total, the densities of 401 intact wood, 212 discoloured wood and 117 spongy rot specimens were measured obtained from the cross-cut discs of sampled trees. The Kruskal Wallis test was used to determine the statistically significant differences between mean values of intact wood, discoloured wood and spongy rot basic density. Our analysis revealed that mean basic density of intact wood differed significantly (p < 0.01) from the mean values of discoloured wood -361.3 kg m -3 and spongy rot -240.9 kg m -3 suggesting that decrease in wood density due to the internal decay must be taken into account for the stem biomass calculations. Our findings indicate that spongy rot incidence varied strongly between individual forest stands, from 2.4% -80.9%. Other studies have confirmed that not only the density but also the carbon content of wood varies by its decomposition process.

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Section: Resultsmentioning

confidence: 92%

Reduction of Wood Basic Density in Decayed Grey Alder Stems

Liepiņš

Bleive

Lazdiņš

et al. 2022

Rural Development 2019

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“…The vast heterogeneity of deadwood (e.g., tree species, type, size, pose, level of decay) that determine the richness of saproxylic organisms [67,85] makes it complicated to assess carbon storage within it. For aspen, controversial findings of its carbon concentration throughout proceeding decomposition have been reported claiming no effect [20], reduced [39,86], or increased [87] carbon concentration along the decay stages. Precise calculations are also hampered by species-specific features related to characteristic decay from inside of living trees that complicate both live and dead aspen wood estimations.…”

Section: Discussionmentioning

confidence: 99%

Availability and Structure of Coarse Woody Debris in Hemiboreal Mature to Old-Growth Aspen Stands and Its Implications for Forest Carbon Pool

Šēnhofa

Šņepsts

Bičkovskis

et al. 2021

Forests

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European aspen deadwood is extensively studied as a habitat for saproxylic species, while less is known of its dynamics and role in carbon sequestration. We studied unmanaged mature (41–60 years), moderately overmature (61–80 years), overmature (81–100 years), and old-growth (101–140 years) and managed mature and moderately overmature aspen stands on fertile mineral soils. In unmanaged stands, marginal mean CWD volume was from 67.3 ± 12.1 m3 ha−1 in moderately overmature to 92.4 ± 5.1 m3 ha−1 in old-growth stands, with corresponding marginal mean CWD carbon pool 8.2 ± 1.6 t ha−1 and 12.5 ± 0.7 t ha−1, respectively. Both CWD volume and its carbon pool had substantial yet non-significant differences (all p > 0.05) among the age groups. High CWD volume was present in most stands, by at least two-thirds of plots comprising more than 20 m3 ha−1, and about half of CWD was larger than 30 cm in diameter. Changes in CWD species composition toward a higher proportion of deciduous deadwood in old-growth stands, together with a high volume of recently dead trees, suggest early senescence of the dominant aspen cohort.

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“…This component is primarily quantified as part of NFI assessments (Russell et al 2015). In response to the call for improvements in carbon accounting methodology, there has been extensive research conducted on the basic density of deadwood, as well as the release of CO 2 through the decomposition of wood (Covey et al 2016;Hietala et al 2015;Köster et al 2015;Neumann et al 2023;Nilsson et al 2002;Prescott et al 2017;Stakėnas et al 2020). In contrast, the study of internal decay in living trees has received considerably less attention in this context.…”

Section: Introductionmentioning

confidence: 99%

Effect of stem rot on wood basic density, carbon, and nitrogen content of living deciduous trees in hemiboreal forests

Liepiņš,

Jaunslaviete,

Liepiņš

et al. 2023

Silva Fenn

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While numerous studies have focused on analyzing various aspects of the carbon (C) budget in forests, there appears to be a lack of comprehensive assessments specifically addressing the impact of stem rot on the C budget of broadleaf tree species, especially in old-growth forests where stem rot is prevalent. One of the main challenges in accurately quantifying C losses caused by stem rot is the lack of precise data on the basic density and C content of decayed wood, which are crucial for converting decayed wood volume into biomass and C stocks. Using linear mixed-effects models, we examine the variability of wood basic density, C content, and nitrogen (N) content. Discolored and decomposed wood was collected from the stems of 136 living deciduous trees common in hemiboreal forests in Latvia. Our research indicates a noticeable reduction in the wood basic density, coupled with an increase in the N content within the stem wood throughout the decomposition process in birch (Betula spp.), European aspen (Populus tremula L.), grey alder (Alnus incana (L.) Moench), and common alder (Alnus glutinosa (L.) Gaertn.). While aspen wood showed a decreasing trend in C content as decay progressed, a pairwise comparison test revealed no significant differences in C content between discolored and decomposed wood for the studied species, unlike the findings for basic density and N content. This study emphasizes the need to account for stem rot in old-growth forest carbon budgets, especially in broadleaf species, and calls for more research on stem rot-induced carbon losses.

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Dead wood carbon density for the main tree species in the Lithuanian hemiboreal forest

Cited by 12 publications

References 35 publications

Reduction of Wood Basic Density in Decayed Grey Alder Stems

Reduction of Wood Basic Density in Decayed Grey Alder Stems

Availability and Structure of Coarse Woody Debris in Hemiboreal Mature to Old-Growth Aspen Stands and Its Implications for Forest Carbon Pool

Effect of stem rot on wood basic density, carbon, and nitrogen content of living deciduous trees in hemiboreal forests

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