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Kärki, Timo; Maltamo, Matti; Eerikäinen, Kalle

doi:10.1023/a:1006793616781

Cited by 18 publications

(7 citation statements)

References 20 publications

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“…Stem rot is common for A. incana trees in Latvian forests, affecting 18% of the trees and varying widely (1-54%) among stands [42]. This finding is consistent with previous research on gray alder in Finland, which reported even higher decay frequency and variation among stands [43]. According to a different study, A. glutinosa stands exhibit a greater prevalence of decay than A. incana, with rates ranging from 53% to 98% across various mature stands [44].…”

Section: Stem Rot Incidence and Variability Across Tree Speciessupporting

confidence: 89%

A Comparative Study of Stem Rot Severity in Mature Deciduous Trees in Latvia

Liepiņš,

Lazdiņš

et al. 2023

Sustainability

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Efforts to enhance carbon storage in forest ecosystems through policy and management decisions rely on accurate forest biomass assessments. However, most forest inventories consider tree mortality the only form of aboveground biomass loss, overlooking other important factors, such as wood decay in living trees. In this study, using linear mixed-effects models, we delve into the sustainability of mature and over-mature deciduous forests in Latvia by conducting a comprehensive analysis of stem rot severity, identifying species for which the impact of stem rot on their carbon stock reduction was most significant. The analysis focused on determining the proportion of discolored wood, decomposed wood, and hollow spaces within the stems of 190 living deciduous trees commonly found in hemiboreal forests. The study reveals a greater extent of stem rot and more extensive decay in Populus tremula trees than in Betula spp., Alnus glutinosa, and Alnus incana. It emphasizes the influence of tree species, age, and diameter at breast height on stem rot proportions. The stump rot area significantly predicts the amount of decomposed and discolored wood within the stem. The study provides valuable insights for sustainable forestry practices and highlights challenges in estimating stem rot severity, emphasizing the need for comprehensive diagnostic methods.

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Section: Stem Rot Incidence and Variability Across Tree Speciessupporting

confidence: 89%

A Comparative Study of Stem Rot Severity in Mature Deciduous Trees in Latvia

Liepiņš,

Lazdiņš

et al. 2023

Sustainability

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“…The system of forest management models is constantly updated (Bravo et al, 2019;Kiviste et al, 2015). Therefore, it is justified to prefer the formula for the increase in the basal area of the stand over the increase in the volume of the stand (Kärki et al, 2000). The calculation of the increment of basal area is based on the measurement of the diameters but calculation of the stand volume growth includes additionally the height and stem taper.…”

Section: Discussionmentioning

confidence: 99%

“…Metsakorralduse mudelite süsteem on pidevas uuendamises (Bravo et al, 2019;Kiviste et al, 2015). Seetõttu on puistu rinnaspindala juurdekasvu valemi eelistamine mahu juurdekasvu ees põhjendatud (Kärki et al, 2000). Rinnaspindala arvestus põhineb dia meetrite mõõtmisel, tagavara põhineb lisaks diameetril veel kõrgusel ja mahu või vormiarvu mudelitel.…”

Section: Sissejuhatusunclassified

The model of stand basal area gross growth on the data of the Estonian Network of Forest Research Plots

Padari,

Kiviste,

Laarmann

et al. 2023

Forestry Studies

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The stand level gross volume increment models are used to estimate the future production of tree stands. Very often, the stand growth and yield in the models used in practice are described by the tree volume increment that includes the diameter growth function with the tree height together with stem taper as the input variables. The currently used function of stand volume increment in Estonia included also stand relative density as an additional input variable. In the current study, we developed a basal area increment function based on the periodic measurement data of the Estonian Network of Forest Research Plots (ENFRP). As in the earlier model of stand volume increment developed by Priit Kohava, in the current model the basal area increment of tree species is developed for a pure stand, and for mixed stands, the proportion of the tree species’ basal area is used. The tests in our data indicated that the periodic increment prognosis had good fit in the case of variable share of tree species in the main storey and coincide with the earlier studies by Finnish and Swedish colleagues. The developed model of basal area increment predictions are expectedly higher than the earlier model predictions for the most tree species and stand relative densities.

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“…According to the study 18% of grey alder stems in Latvian forests are damaged by internal stem decay and the volume of decay-degraded wood in grey alder stands in Latvia is up to 60 m 3 ha -1 at the age of 60-65 years. In Finland observed proportion of internal stem decay in alder stands is even higher, 36%, 29% and 33% for trees under 40 years, 41 to 60 years and over 60 years of age, respectively (Kärki, Maltamo, & Eerikäinen, 2000).…”

Section: Introductionmentioning

confidence: 89%

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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Cited by 18 publications

References 20 publications

A Comparative Study of Stem Rot Severity in Mature Deciduous Trees in Latvia

A Comparative Study of Stem Rot Severity in Mature Deciduous Trees in Latvia

The model of stand basal area gross growth on the data of the Estonian Network of Forest Research Plots

Reduction of Wood Basic Density in Decayed Grey Alder Stems

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