scholarly journals 90Sr Content in the Stemwood of Forests within Ukrainian Polissya

Forests ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 270
Author(s):  
Andrii Bilous ◽  
Dmytrii Holiaka ◽  
Maksym Matsala ◽  
Valery Kashparov ◽  
Dmitry Schepaschenko ◽  
...  
Keyword(s):  
Tree Species ◽  
Forest Ecosystems ◽  
Growth Conditions ◽  
Growth And Yield ◽  
Energy Agency ◽  
Transfer Factors ◽  
Black Alder ◽  
90Sr Content ◽  
Lack Of Information ◽  
Geometrical Mean

The consequences of the Chernobyl disaster continue to threaten humans and ecosystems across fallout gradient in Northern Ukraine and nearby. Forest ecosystems contain substantial stocks of long-lived radionuclide 90Sr which was leached from the fuel matrix during the disaster. Nowadays, there is a lack of information about current transfer factors (TF) of this radionuclide from soil to the stemwood of native tree species. We have estimated 90Sr content in the forest stemwood of three tree species utilizing models of their growth and yield and collected woody samplings. TFs provided here vary greatly across studied tree species (18.0 × 2.1±1, 8.7 × 2.8±1, and 10.4 × 6.0±1 n × 10−3 m2·kg−1 (geometrical mean (GM) ± geometrical standard deviation, GSD) for the above species, respectively) and together with indicators of soil contamination allow us to reliably assess local stocks in the stemwood. Silver birch stands are estimated to deposit the highest 90Sr stocks. Herewith, at 25 years old Black alder stands could accumulate higher stocks (up to 35 MBq·ha−1) under rich growth conditions. TFs obtained in this study substantially exceed values provided by the International Atomic Energy Agency for studied tree species and thus could entail respective restrictions on use of firewood across large areas in Ukrainian Polissya. Data provided here may be harnessed to support decisions of respective stakeholders to provide credibly safe management of the contaminated forest ecosystems.

Der Binding Waldpreis – Auslöser für waldbaulich-ertragskundliche Forschung | The Binding Forest Award initiates silvicultural and yield research

2011 ◽  
Vol 162 (3) ◽  
pp. 65-70
Author(s):  
Andreas Zingg ◽  
Hansheinrich Bachofen
Keyword(s):  
Forest Ecosystems ◽  
Swiss Federal Institute ◽  
Growth And Yield ◽  
High Quality ◽  
Federal Institute ◽  
Ecological Values ◽  
Prize Award ◽  
Landscape Research ◽  
Selection Forest ◽  
Time Required

Between 1995 and 2008 the granting of the Binding Forest Award led to fresh cooperation between forest owners and research on silviculture, growth and yield at the Swiss Federal Institute for Forest, Snow and Landscape Research. Various topics were treated: a study of the beech coppices in Rothenfluh rapidly made it clear that very little was known about this formerly widespread type of forest management and its consequences. The same was true to a lesser extent for the conversion of rather uniform high forest into selection forest (in Plasselb), and for the selective management of light demanding tree species, such as the oak, in Rheinau. In Boudry, cooperation between practice and research already existed: the prize award here led to new approaches in the production of high quality oak, whilst taking ecological values into account. All these new projects are still in their earliest stages and will call for a great deal of “sustainability”, in both senses of the word, from all those involved. Considering the long periods of time required for the development of forest ecosystems, this is in fact self-evident.

Ontario's forest growth and yield modelling program: Advances resulting from the Forestry Research Partnership

2008 ◽  
Vol 84 (5) ◽  
pp. 694-703 ◽  
Author(s):  
Mahadev Sharma ◽  
John Parton ◽  
Murray Woods ◽  
Peter Newton ◽  
Margaret Penner ◽  
...  
Keyword(s):  
Tree Species ◽  
Stand Density ◽  
Forest Growth ◽  
Growth And Yield ◽  
Research Partnership ◽  
Wood Supply ◽  
Permanent Sample Plots ◽  
Forestry Research ◽  
Research Activities ◽  
Forest Growth And Yield

The province of Ontario holds approximately 70.2 million hectares of forests: about 17% of Canada’s and 2% of the world’s forests. Approximately 21 million hectares are managed as commercial forests, with an annual harvest in the early part of the decade approaching 200 000 ha. Yield tables developed by Walter Plonski in the 1950s provide the basis for most wood supply calculations and growth projections in Ontario. However, due to changes in legislation, policy, and the planning process, they no longer fully meet the needs of resource managers. Furthermore, Plonski`s tables are not appropriate for the range of silvicultural options now practised in Ontario. In October 1999, the Canadian Ecology Centre- Forestry Research Partnership (CEC-FRP) was formed and initiated a series of projects that collectively aimed at characterizing, quantifying and ultimately increasing the economically available wood supply. Comprehensive, defensible, and reliable forecasts of forest growth and yield were identified as key knowledge gaps. The CEC-FRP, with support from the broader science community and forest industry, initiated several new research activities to address these needs, the results of which are outlined briefly in this paper. We describe new stand level models (e.g., benchmark yield curves, FVS Ontario, stand density management diagrams) that were developed using data collected from permanent sample plots and permanent growth plots established and remeasured during the past 5 decades. Similarly, we discuss new height–diameter equations developed for 8 major commercial tree species that specifically account for stand density. As well, we introduce a CEC-FRP-supported project aimed at developing new taper equations for plantation grown jack pine and black spruce trees established at varying densities. Furthermore, we provide an overview of various projects undertaken to explore measures of site productivity. Available growth intercept and site index equations are being evaluated and new equations are being developed for major commercial tree species as needed. We illustrate how these efforts are advancing Ontario’s growth and yield program and supporting the CEC-FRP in achieving its objective of increasing the supply of fibre by 10% in 10 years while maintaining forest sustainability. Key words: permanent sample plots (PSPs), permanent growth plots (PGPs), normal yield tables, sustainable forest management, NEBIE plot network, forest inventory, Forest Vegetation Simulator

scholarly journals Growth and yield characteristics according to tree species in the log cultivation of Pleurotus pulmonarius

2016 ◽  
Vol 14 (3) ◽  
pp. 105-110
Author(s):  
Jae-Hong Lee ◽  
Nam-Gil Lee ◽  
Youn-Gi Mun ◽  
Tae-Sung Jeong ◽  
Sun-Bae Kwon ◽  
...  
Keyword(s):  
Tree Species ◽  
Growth And Yield ◽  
Pleurotus Pulmonarius ◽  
Log Cultivation

scholarly journals Tree shape and form in ancient coppice woodlands

2017 ◽  
Vol 10 (2) ◽  
pp. 49-62 ◽  
Author(s):  
Petr Maděra ◽  
Tomáš Slach ◽  
Luboš Úradníček ◽  
Jan Lacina ◽  
Linda Černušáková ◽  
...  
Keyword(s):  
Tree Species ◽  
Field Survey ◽  
Scientific Literature ◽  
Forest Stands ◽  
Tree Shape ◽  
Lack Of Information ◽  
Basic Features

Abstract Ancient coppice woodlands are coppice-originated forest stands with a long-term continual development, and with the preserved typical natural and historic elements of old sprout forests. Prominent natural elements in the ancient coppice woodlands are namely old coppice stools. There is, in scientific literature, lack of information about features of ancient coppice stools. Therefore, our contribution aims to describe shape and form of ancient coppice stools, including the most important microhabitat of coppice woodlands – dendrothelms. Based on field survey of 20 localities of important coppice woodlands we recorded 135 ancient coppice stools of 13 tree species and a total of 80 dendrothelms in 9 tree species. Basic features of ancient coppice stools and dendrothlems were measured and evaluated.

scholarly journals The survey of some factors affecting bark lesion development caused by Phytophthora cactorum on common beech and other broadleaved trees

2010 ◽  
Vol 56 (No. 3) ◽  
pp. 93-100 ◽  
Author(s):  
V. Holub ◽  
K. Černý ◽  
V. Strnadová ◽  
M. Mrázková ◽  
B. Gregorová ◽  
...  
Keyword(s):  
Substrate Specificity ◽  
Tree Species ◽  
Stem Canker ◽  
Forest Tree ◽  
Pedunculate Oak ◽  
Phytophthora Cactorum ◽  
Lesion Development ◽  
Black Alder ◽  
Forest Tree Species ◽  
Common Beech

The three experiments relating to the pathogenicity of <I>Phytophthora cactorum</I> to beech and other forest tree species were carried out. The experiments were aimed to confirm pathogenicity of the pathogen, to compare its pathogenicity with the other <I>Phytophthora</I> species isolated from woody plants in the Czech Republic (<I>P. gonapodyides</I>, <I>P. cambivora</I>, <I>P. citricola</I> s.l., <I>P. cinnamomi</I>, <I>P. citrophthora</I>), to confirm its substrate specificity and diverse pathogenicity to common forest tree species (common beech, pedunculate oak, sycamore, small-leaved lime, black alder, common ash) and to determine the influence of excessive watering on the stem canker development. We found out that the tested isolate of <I>P. cactorum</I> was more effective to the host than isolates of <I>P. gonapodyides</I> and <I>P. cambivora</I>. The isolates of <I>P. cinnamomi</I> and <I>P. citrophthora</I> caused the largest necroses. It emerged that all tested tree species were susceptible to <I>P. cactorum</I>. The most susceptible tree species were sycamore and common beech. The most resistant tree species were common ash and pedunculate oak. The existence of substrate specificity of the pathogen was unequivocally confirmed. It was found out that the water stress could play an important role in the bark lesion development. We found out important differences in lesion development in different periods during growing season (June, September). &nbsp;

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