scholarly journals Spatial distribution of losses in growth of trees caused by the feeding of pine shoot beetles Tomicus piniperda and T. minor (Col., Scolytidae) in Scots pine stands growing within range of the influence of a timber yard in southern Poland

2012 ◽  
Vol 52 (No. 3) ◽  
pp. 130-135 ◽  
Author(s):  
A. Borkowski
Keyword(s):  
Spatial Distribution ◽  
Scots Pine ◽  
Basal Area ◽  
Tomicus Piniperda ◽  
Pine Trees ◽  
Pine Stands ◽  
The Difference ◽  
High Level ◽  
Pine Shoot Beetles ◽  
Scots Pine Stands

This study deals with the assessment of increment losses in Scots pine trees caused by the maturation feeding of pine shoot beetles Tomicus piniperda (L.) and T. minor (Hart.) (Col., Scolytidae) in even-aged stands growing during their entire life span within range of the influence of a sawmill and its timber yard. In spring 2004, on three sample plots, 0.2 ha in size, situated 60, 200, and 500 m from the yard, height and dbh of all trees were measured and increment cores were taken from randomly selected sample trees. An agreement between the spatial distribution of losses in tree increments and the distribution of damage to crowns of investigated stands indicated that the losses resulted from the maturation feeding of pine shoot beetles migrating from the sawmill timber yard. Divergence of growth in the about 25-years-old stand indicated the beginning of intensive feeding of beetles in pine shoots with a high level of probability. In comparison with the control stand the basal area losses in stands growing 60 and 200 m from the beetle source amounted to 57% and 46%, respectively. The difference in the height of trees was as large as almost 100%.

scholarly journals Genetic Diversity and Its Spatial Distribution in Self-Regenerating Norway Spruce and Scots Pine Stands

Forests ◽  
2017 ◽  
Vol 8 (12) ◽  
pp. 470 ◽  
Author(s):  
Rita Verbylaitė ◽  
Alfas Pliūra ◽  
Vaidotas Lygis ◽  
Vytautas Suchockas ◽  
Jurga Jankauskienė ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Spatial Distribution ◽  
Norway Spruce ◽  
Scots Pine ◽  
Pine Stands ◽  
Scots Pine Stands

scholarly journals Impact of air pollution on forest stands in the vicinity of Wodzisław Śląski and Rybnik, Poland

2020 ◽  
Vol 45 (4) ◽  
pp. 283
Author(s):  
Joanna Barniak ◽  
Agnieszka Jureczko
Keyword(s):  
Air Pollution ◽  
Tree Ring ◽  
Scots Pine ◽  
Ring Width ◽  
Forest Stands ◽  
Increment Core ◽  
Pine Trees ◽  
Pine Stands ◽  
The Impact ◽  
Scots Pine Stands

Tree-ring analysis was used to investigate the impact of air pollution on forest stands in the southern part of the Upper Silesia region of southern Poland. Four about 120 years old Scots pine stands located near Wodzisław Śląski and Rybnik were selected for study and 20 increment core samples from each stand were taken. All study stands were selected based upon their considerable exposure to air and dust pollution.The results of dendrochronological analysis showed strong and significant reductions in tree ring growth especially during the period from 1960 to 1990. A significant number of trees with reductions (85%) was observed in two Scots pine stands both of which are directly exposed to air pollution from mine-owned coking plant and power and heating plants. Since 1990s the improved growth of these pines was clearly noted. A comparison for the period 1970 to 1990 for stands located west from the main emitters’ versus stands east and directly exposed found fewer trees with growth reductions (ca. 40%). At the beginning of the 21st century, a large number of trees in these western stands were observed with growth reductions between 50 and 60%. Probably, these trees were affected by air pollution from a nearby power plant located immediately across the border in the Czech Republic. Relationships between periods of severe reductions in ring width growth or missing rings were noted in a large percentage of pine trees in all four stands; these cross-stand relationships suggested common weather-related impacts. Missing rings were noted in 1956, 1963, 1968, 1970, 1971, 1973, 1976 and 1979.

scholarly journals The influence of different thinning methods on dominance coefficients of future crop trees in even-aged Scots pine stands

2014 ◽  
Vol 75 (1) ◽  
pp. 31-45
Author(s):  
Tadeusz Zachara
Keyword(s):  
Scots Pine ◽  
Average Diameter ◽  
Long Term Effect ◽  
Pine Stands ◽  
The Difference ◽  
1960S And 1970S ◽  
Poor Site ◽  
Thinning Effect ◽  
Scots Pine Stands

Abstract The research aim was to evaluate the influence of different thinning methods on future crop tree growth. Investigations were conducted on permanent Scots-pine experimental plots, established in 1960s and 1970s in Kozienice, Łąck, Parciaki and Janów Lubelski Forest Districts. To assess the response to thinning of future crop trees, their dominance coefficients were used. These are defined as quotients for each given future crop tree diameter and average stand diameter (WP1), the average dominant layer diameter (WP2) and the average diameter of 100 thickest trees per hectare (WP3). The difference between each coefficient value at the beginning and at the end of the measurement period was used as a measure of the thinning effect. On Kozienice, Łąck and Parciaki plots the differences between treatments were significant, especially in the period after first thinning. The increase of WP3 coefficient occurred in a case of strong thinning - TS1 and TS2. On plot Parciaki also the moderate thinning TU1 and TU2 had a significant influence on change of this coefficient. On plot Janów Lubelski the influence of treatment has not been stated in the first 5-year period but in the next one. Analyses of changes in the dominance coefficients confirmed the hypothesis that the WP3 coefficient is very useful as it is the most stable indicator of future crop-tree position in a stand. On Kozienice, Łąck and Parciaki plots the significant differences between treatments were stated, especially in the period after first thinning. The influence of thinning treatment on the plot Janów Lubelski was not considered for the first 5-year period but in the next one. All reactions to thinning were slower on this plot, possibly because of the relatively poor site conditions. This was a long-term effect. The results obtained suggest that very intense thinning of Scots pine stands should only be implemented under a restricted set of conditions - in healthy, not neglected, forest stands. Classical moderately-selective thinning is preferable to intense thinning and is the most convenient option for pine stands

Typology of the natural regeneration in a middle-aged Scots pine forest

1988 ◽  
Vol 53 ◽  
Author(s):  
C. De Schepper
Keyword(s):  
Scots Pine ◽  
Natural Regeneration ◽  
Free Field ◽  
Sandy Soils ◽  
Structural Basis ◽  
Pedunculate Oak ◽  
Pine Stands ◽  
Scots Pine Forest ◽  
Forest Practice ◽  
Scots Pine Stands

The  study describes the natural regeneration state of a forest on coarse sandy  soils. The natural regeneration was studied in three different ecological  conditions: in 30 to 60 year old Scots pine stands, in a 62 year old mixed  stand of pedunculate oak and red oak, and on the free field.     The analysis of the regeneration groups revealed that the first settler  maintained a dominant social position during the following years after the  settlement. The structural basis is consequently laid out early. This means  that the forest practice has to consider the very first phase of the  regeneration as determining for the following evolution of the regeneration  groups.

An analysis of a spontaneous ingrowth of deciduous trees in 70 year old stands of Scots pine

1987 ◽  
Vol 52 ◽  
Author(s):  
N. Lust
Keyword(s):  
Scots Pine ◽  
Red Oak ◽  
Deciduous Trees ◽  
Pedunculate Oak ◽  
Black Cherry ◽  
Height Distribution ◽  
Stem Number ◽  
Pine Stands ◽  
Spontaneous Regeneration ◽  
Scots Pine Stands

In 70  years old homogeneous Scots pine stands, bordered by a hardwood belt, an  analysis was made about the spontaneous ingrowth of natural seedlings. The  analysis involved especially the following points: species and stem number,  influence of the hardwood belts, diameter and height distribution, age,  growth and structure. From the age of 30 years, a spontaneous regeneration of  hardwoods established in Scots pine stands. There are on average 7,000 plants  per ha, 80 % of which are black cherry and another fair number are red oak  and pedunculate oak. The regeneration has an average age of 25 to 30 years,  it is uneven aged, contains several diameter and height classes and has  already partially penetrated the upper stratum.     The spontaneous ingrowth allows to convert in a simple way the homogeneous  coniferous stands into mixed hardwood stands.

scholarly journals Bayesian calibration, comparison and averaging of six forest models, using data from Scots pine stands across Europe

2013 ◽  
Vol 289 ◽  
pp. 255-268 ◽  
Author(s):  
M. van Oijen ◽  
C. Reyer ◽  
F.J. Bohn ◽  
D.R. Cameron ◽  
G. Deckmyn ◽  
...  
Keyword(s):  
Scots Pine ◽  
Bayesian Calibration ◽  
Forest Models ◽  
Pine Stands ◽  
Using Data ◽  
Scots Pine Stands

scholarly journals Belowground biomass models for young oligotrophic Scots pine stands in Latvia

2018 ◽  
Vol 11 (2) ◽  
pp. 206-211 ◽  
Author(s):  
L Kenina ◽  
A Bardulis ◽  
R Matisons ◽  
R Kapostins ◽  
A Jansons
Keyword(s):  
Scots Pine ◽  
Belowground Biomass ◽  
Biomass Models ◽  
Pine Stands ◽  
Scots Pine Stands
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