Thinning in artificially regenerated young beech stands

Novák, Jiří; Dušek, D.; Slodičák, M.

doi:10.1515/forj-2015-0031

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…The comparison of the EQ method and the NFI II field survey in Hercynicum seems considerably problematic, as the zonal 5 th FVZ range corresponds to up to six confidence interval values, which suggests that the mapping of the 5 th FVZ has been done in macroclimate conditions of the 2 nd -6 th FVZs. This can be due to overestimating the actual tree composition (Zlatník 1955), given the fact that the recent representation of silver fir in the actual tree composition (including zonal sites) is very low in comparison with the site's vegetation potential (Novák, Dušek 2021;Remeš 2022).…”

Section: Discussionmentioning

confidence: 99%

Assessment of the Ellenberg quotient as a practical tool for vertical vegetation zonation

Dujka¹,

Kusbach²

2023

J. For. Sci.

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The Ellenberg quotient (EQ) is a climate index defined as a ratio of the hottest month's temperature and the average annual precipitation sum. The quotient indirectly expresses the relationship between climate and vegetation, and its application is related to the ecological niche of Fagus sp. Although the quotient was curated on the grounds of field research primarily on German vegetation, the possibilities of its utilisation are not limited to the Central European region. The objective of this study is (i) to compare the EQ values calculated for the forest vegetation zones in the Czech Republic with the published data using the ecological niche of Fagus sylvatica; and (ii) to compare the new EQ-based vertical model with field empirical mapping. The study area is the Czech Republic, Central Europe. We used climate data from 1970-2000 and the data of the National Forest Inventory, 2 nd cycle (2011)(2012)(2013)(2014)(2015), representing an objective data design. Geospatial analytic methods, machine learning (boosting), and verification through statistical testing were performed. The results indicate higher EQ values between the two most substantial spatial frames -the Hercynicum and Carpaticum regions. By comparing empirical mapped units to their climatic potential (in the EQ), a match was found only within the Carpaticum region. The study presents a concretisation of the general climate index for a specific region, adds to the knowledge about the Fagus ecological niche in context with the Central European vegetation, and also points to the EQ's potential for evaluating the concept of vertical differentiation of forest communities, as well as a possible prediction tool for the vegetation migration in context with climate change.

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Section: Discussionmentioning

confidence: 99%

Assessment of the Ellenberg quotient as a practical tool for vertical vegetation zonation

Dujka¹,

Kusbach²

2023

J. For. Sci.

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“…Forest regeneration is also under competition with other undergrowth, which causes a high threat to future regeneration (Vopravil et al 2014;Novák et al 2015). But, due to the favourable conditions for the growth the soil health is also in a very good condition on a moderate slope area, which can help the regeneration (Marques et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Impact of silvicultural system on natural regeneration in Western Himalayan moist temperate forests of Pakistan

Iqbal¹

2021

J. For. Sci.

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Site conditions (topography, aspect, moisture availability, humus thickness, light exposure, and grazing activities) play a vital role in the germination and regeneration process. The research was conducted in the Himalayan moist temperate forest. The research site was divided based on the silvicultural system (group selection system and single-tree selection system) into 148 plots and 150 plots, respectively. The group selection system was examined on the site of 2 ha which was clear-felled under a project in the 1980's. The present study examined the impact of silvicultural systems on regeneration. The frequency table was used, and relative frequency was calculated for the species and silvicultural system, density per m2 was also calculated. Diversity indices were calculated through taxa, dominance, Simpson’s index, Shannon index, evenness, equitability, and fisher alpha. Ten taxa were found in both silvicultural systems, with individual repetition of 17 and 15 taxa, respectively. Group selection is more compact visibly as compared to the single-tree selection system. The single-tree selection system is more diversified in species composition, stand structure, moisture availability, and less humus availability. The study also highlights future predictions for the conservation of these forests, which are highly sensitive and a hotspot for wildlife and climate change phenomena. Silvicultural practices such as silvicultural system, cleaning, weeding, thinning operations are regularly practiced, which can reduce the negative impact on these productive forests.

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“…Soil microorganisms and enzymes are responsible for maintaining soil fertility through degradation and mineralization of organic matter. Changes in conditions for plant growth, such as silvicultural measures necessary aging stands, can cause changes in microbial communities and their biochemical activity and affect the availability of nutrients for plants (Singh & Singh 2005;Novák et al 2015). Ammonification of arginine has a significant relationship with the soil microbial biomass and affects their biochemical activity (Davis et al 1978;Alef & Kleiner 1986;Singh & Singh 2005).…”

Section: Introductionmentioning

confidence: 99%

Seasonal dynamics of arginine ammonification in forest soils of Norway spruce pure stands under different silvicultural practices

Holík

Kučera

Rejšek

et al. 2017

Central European Forestry Journal

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Effects of seasonal dynamics and silvicultural practice on ammonification of arginine, one of the proteinogenic amino acids, were assessed in surface organic H-horizon of three Norway spruce pure stands in medium altitudes (600 -660 m a.s.l.). Contents of ammonium ions NH 4 + measured monthly in the field and contents of NH 4 + after laboratory incubation of these samples with arginine were taken as dependent variables in ANOVA and in linear regression model using generalised linear model. The aim of the analyses was to determine the significance of decomposition of this amino acid in H-horizon of forest soils and to determine categorical and continuous predictors which influence intensity of the ammonification. Laboratory experiments confirmed its close link to seasonal dynamics, as well as to forest management; however the last mentioned was firstly found as less significant when compared within whole season. As regards to seasonal dynamics in forest soils, the highest amount of ammonium ion was released in May and the lowest in July. As regards to the silvicultural practice applied, more ammonium ion was released under mature spruce monoculture, especially in August and May; in the young stands, the method of thinning had no effect on the ammonium ion release. However, the arginine ammonification was found to be influenced by ammonium nitrogen content (slight, less significant negative correlation) and by soil water content (stronger positive significance), especially in the stand with thinning from below. This was concluded to be caused by changes in stand microclimate in function of the silvicultural practice.

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Thinning in artificially regenerated young beech stands

Cited by 5 publications

References 17 publications

Assessment of the Ellenberg quotient as a practical tool for vertical vegetation zonation

Assessment of the Ellenberg quotient as a practical tool for vertical vegetation zonation

Impact of silvicultural system on natural regeneration in Western Himalayan moist temperate forests of Pakistan

Seasonal dynamics of arginine ammonification in forest soils of Norway spruce pure stands under different silvicultural practices

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