scholarly journals Bioenergy potential of mature pine and spruce stands in the boreal zone of Russia

2021 ◽  
Vol 876 (1) ◽  
pp. 012021
Author(s):  
D A Danilov ◽  
A S Kharlanov
Keyword(s):  
Boreal Zone ◽  
Spruce Stands

scholarly journals AGARICOID BASIODIMYCETES IN PETROZAVODSK CITY GREEN SPACES (REPUBLIC OF KARELIA)

2018 ◽  
Vol 8 (1) ◽  
pp. 52-71
Author(s):  
Леонид Савельев ◽  
Leonid Savel'ev ◽  
Анастасия Кикеева ◽  
Anastasiya Kikeeva
Keyword(s):  
Trophic Structure ◽  
Forest Tree ◽  
Middle Taiga ◽  
Taxonomic Structure ◽  
Boreal Zone ◽  
Forest Zone ◽  
Number Of Species ◽  
Spruce Stands ◽  
Leading Position ◽  
Nomic Structure

The paper reports the results of studies on the taxonomic and trophic structure of agaricoid basidiomycetes in urban stands of the main forest tree species of the boreal zone (Betula, Larix, Picea, Pinus). Altogether 111 species of macromycetes of 59 genera, 33 families and 8 orders were found. The leader in terms of the number of species in this mycobiota is the group of mycorrhiza-forming fungi. The biota of agaricoid fungi is of the boreal type with the taxo-nomic structure most vividly demonstrating the traits of the mycobiota typical of the middle taiga subzone of Karelia. A distinctive feature of the mycobiota is the high number of species in the families Agaricaceae and Russulaceae, which are common in ruderal habitats and the forest zone. A comparison of the species composition and ratios in the taxonomic structure of the mycobiota between plant communities of urban and undisturbed areas, as well as Karelia in general showed a low level of similarity and pointed to gaps in the current inventory of agarics in the boreal zone of Republic. The highest species diversity of macromycetes was found in spruce stands, and the lowest in larch stands. The structure of the agaricoid fungal biota in sample plots in the spruce-, birch- and larch stands was relatively stable, with some fluctuation. As to the structure of the pine stand mycobiota, the spectrum of families ranked by the number of species in them changed along the human pressure gradient, and the trophic structure changed accordingly. The number of symbiotrophic species decreased, litter-related saprotrophs disappeared, the leading position was taken over by humus-related saprotrophs. The surveys revealed the presence of 11 red-listed species classified into two categories – near threatened (NT) and data deficient (DD) species.

The component composition of planted pine wood cultivated in the boreal zone

2020 ◽  
Vol 35 (4) ◽  
pp. 685-693
Author(s):  
D. A. Danilov ◽  
A. V. Griazkin ◽  
V. A. Sokolova ◽  
I. V. Bacherikov
Keyword(s):  
Component Composition ◽  
Water Soluble ◽  
Boreal Zone ◽  
Lower Content ◽  
Average Yield ◽  
Leningrad Oblast ◽  
Pine Wood ◽  
Natural Stands

AbstractThe present study analyzes the composition of pine wood cultivated on artificial plantations in the Leningrad Oblast (Region). Comparing to pine wood from natural stands, a smaller heartwood zone along the height of the pine trunk and a lower content of resinous substances are noted. The content of cellulose and lignin in the heartwood and sapwood of pine is distributed differently along the trunk. The distribution of pentosans and water-soluble substances in the heartwood and sapwood along the trunk is associated with the lignin complex. The component composition of the studied pine wood from planted stands is quite uniform in its indicators if compared to the wood of older natural stands. Sulphate pulping of planted pine wood showed a higher yield of technical cellulose than the average yield from wood obtained at natural stands of the studied region.

scholarly journals Imitated Whole Tree Harvesting Show Negligible Effect on Economic Value of Spruce Stands

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 841
Author(s):  
Iveta Desaine ◽  
Annija Kārkliņa ◽  
Roberts Matisons ◽  
Anna Pastare ◽  
Andis Adamovičs ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Economic Value ◽  
Forest Types ◽  
Spruce Stands ◽  
The Difference ◽  
Growing Conditions ◽  
Whole Tree Harvesting ◽  
Whole Tree ◽  
Tree Harvesting

The increased removal of forest-derived biomass with whole-tree harvesting (WTH) has raised concerns about the long-term productivity and sustainability of forest ecosystems. If true, this effect needs to be factored in the assessment of long-term feasibility to implement such a drastic forest management measure. Therefore, the economic performance of five experimental plantations in three different forest types, where in 1971 simulated WTH event occurred, was compared with pure, planted and conventionally managed (CH) Norway spruce stands of similar age and growing conditions. Potential incomes of CH and WTH stands were based on timber prices for period 2014–2020. However, regarding the economics of root and stump biomass utilization, they were not included in the estimates. In any given price level, the difference of internal rate of return between the forest types and selected managements were from 2.5% to 6.2%. Therefore, Norway spruce stands demonstrate good potential of independence regardless of stump removal at the previous rotation.

Modeling of growth and development of spruce stands in the West Siberian South taiga plain forest region

2021 ◽  
Vol 677 (5) ◽  
pp. 052121
Author(s):  
P V Mikhaylov ◽  
S L Shevelev ◽  
S M Sul’tson ◽  
S V Verkhovets ◽  
A A Goroshko
Keyword(s):  
Growth And Development ◽  
The West ◽  
Forest Region ◽  
Spruce Stands

scholarly journals A Novel Approach to Evaluate the Effect of Neighboring Trees and the Orientation of Tree Social Area on Stem Radial Increment of Norway Spruce Trees

Forests ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 163
Author(s):  
Jan Světlík ◽  
Jan Krejza ◽  
Pavel Bednář
Keyword(s):  
Norway Spruce ◽  
Tree Growth ◽  
Growth Models ◽  
Explanatory Power ◽  
Radial Increment ◽  
Important Indicator ◽  
The Czech Republic ◽  
Novel Approach ◽  
Spruce Stands ◽  
Social Area

Tree growth depends on many factors such as microsite conditions, vitality, and variations in climate and genetics. It is generally accepted that higher growth indicates both an economic benefit and better vitality of any tree. Here we use a modified approach of evaluating tree social area to study mutual tree competition based on the orientation and shape of trees social area. The investigation was performed in nine Norway spruce stands in the Czech Republic. The objective of this study performed from 2008 to 2012 was to quantify relative tree radial increments with respect to the lowest and highest competition found in specific sectors of tree social area (AS). Specific groups of trees (tree classes) were evaluated according to their classes (dominant, co-dominant and sub-dominant) and their composition status in ninety-degree sectors of AS using established classifying rules. The results showed that a spatially-available area (AA) is an inappropriate parameter for predicting tree growth, whereas AS provided robust explanatory power to predict relative radial growth. Tree size was observed as an important indicator of relative radial increments. A significantly positive correlation was found for a radial increment of sub-dominant trees with the lowest competition from western directions; whereas a negative correlation was observed when the lowest competition was observed from eastern directions. For dominant trees, there was an evident growth reaction only when more than 50% of the AS was oriented towards one of the cardinal points. Individual differences in the orientation of tree AS may be important parameters with regard to competition and its spatial variability within an area surrounding a particular tree and deserve more detailed attention in tree growth models and practice.

scholarly journals Palaeoecology as a Tool for the Future Management of Forest Ecosystems in Hesse (Central Germany): Beech (Fagus sylvatica L.) versus Lime (Tilia cordata Mill.)

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 924
Author(s):  
Astrid Stobbe ◽  
Maren Gumnior
Keyword(s):  
Fagus Sylvatica ◽  
Tilia Cordata ◽  
Beech Forests ◽  
Mountain Ranges ◽  
The Future ◽  
Spruce Stands ◽  
Fagus Sylvatica L ◽  
Low Mountain Ranges ◽  
Intramontane Basins ◽  
Future Management

In the Central German Uplands, Fagus sylvatica and Picea abies have been particularly affected by climate change. With the establishment of beech forests about 3000 years ago and pure spruce stands 500 years ago, they might be regarded as ‘neophytes’ in the Hessian forests. Palaeoecological investigations at wetland sites in the low mountain ranges and intramontane basins point to an asynchronous vegetation evolution in a comparatively small but heterogenous region. On the other hand, palynological data prove that sustainably managed woodlands with high proportions of Tilia have been persisting for several millennia, before the spread of beech took place as a result of a cooler and wetter climate and changes in land management. In view of increasingly warmer and drier conditions, Tilia cordata appears especially qualified to be an important silvicultural constituent of the future, not only due to its tolerance towards drought, but also its resistance to browsing, and the ability to reproduce vegetatively. Forest managers should be encouraged to actively promote the return to more stress-tolerant lime-dominated woodlands, similar to those that existed in the Subboreal chronozone.

Sign in / Sign up

Export Citation Format

Share Document