scholarly journals Site characteristics of Scots pine stands infected by Gremmeniella abietina in Central Finland. 1: Mineral soil sites

1990 ◽  
Vol 0 (216) ◽  
Author(s):  
Anne Sairanen
Keyword(s):  
Scots Pine ◽  
Mineral Soil ◽  
Site Characteristics ◽  
Pine Stands ◽  
Scots Pine Stands

scholarly journals Simulation of the long-term carbon and nitrogen dynamics in Dutch forest soils under Scots pine

1998 ◽  
Vol 2 (4) ◽  
pp. 439-449 ◽  
Author(s):  
B.-J. Groenenberg ◽  
W. de Vries ◽  
H. Kros
Keyword(s):  
Organic Matter ◽  
Scots Pine ◽  
Forest Soils ◽  
Mineral Soil ◽  
Root Turnover ◽  
Organic Layer ◽  
Transformation Rate ◽  
Organic Layers ◽  
Pine Stands ◽  
Scots Pine Stands

Abstract. Dynamics of C and N in forest soils in the Nutrient Cycling and Soil Acidification Model (NUCSAM) are described by the transformation and decomposition of three organic matter compartments, litter, fermented material and humic material. These three compartments are allocated to the morphological distinguishable L, F and H horizons of the organic layer. Changes in the pools of these organic compartments are described with first order equations for decomposition and transformation. Rate constants for decomposition and transformation were derived by calibrating the model to measured organic matter pools in organic layers of a chrono-sequence of five first succession Scots pine stands between 15 and 120 years old. Simulated pools of organic matter in the organic layers were in agreement with measured pools in the five pine stands, except for the first thirty years of the H-horizon. During this period, an increase in organic matter in the H horizon was simulated while no H horizons were observed in the field. The simulated total pool of organic matter in the organic layer agreed well with values from a field inventory in 20 other Scots pine stands, but the simulated distribution over the three horizons differed from the field measurements which varied among sites. For the Scots pine stands the model was able to simulate the organic matter accumulation in the top 40-cm of the mineral soil; derived almost completely from fine root turnover. The accumulated pool of nitrogen in the organic layer was in agreement with measured pools for the oldest Scots pine stand but was too high for the younger stands. Especially, the accumulation of N in the F-horizon was too fast, presumably due to an overestimated retention of nitrogen.

scholarly journals Carbon Pools in Old-Growth Scots Pine Stands in Hemiboreal Latvia

Forests ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 911 ◽  
Author(s):  
Laura Ķēniņa ◽  
Ieva Jaunslaviete ◽  
Līga Liepa ◽  
Daiga Zute ◽  
Āris Jansons
Keyword(s):  
Scots Pine ◽  
Forest Floor ◽  
Mineral Soil ◽  
Carbon Pool ◽  
Carbon Pools ◽  
Tree Biomass ◽  
Old Growth ◽  
Living Tree ◽  
Pine Stands ◽  
Scots Pine Stands

Old-growth forests are widely recognised for the benefits they provide for biodiversity; however, a more comprehensive understanding of their role in climate change mitigation must still be established to find the optimal balance between different forest ecosystem services at a national or regional scale. Very few studies have assessed carbon pools in old-growth Scots pine (Pinus sylvestris L.)-dominated boreal forests, and none have been conducted in hemiboreal forests. Therefore, we assessed the carbon storage of the living tree biomass, deadwood, forest floor (soil organic horizon, including all litter and decomposed wood), and mineral soil in 25 hemiboreal old-growth (163–218 years) unmanaged Scots pine stands in Latvia. The studied stands were without known records of any major natural or human-made disturbance in the visible past. Our results show, that the total ecosystem carbon pool (excluding ground vegetation) was 291.2 ± 54.2 Mg C ha−1, which was primarily composed of living tree biomass (59%), followed by mineral soil (31%), deadwood (5%), and the forest floor (5%). Within the studied stand age group, the total carbon pool remained stable; however, interchanges among the carbon pools, i.e., living biomass and laying deadwood, did occur.

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

scholarly journals Parameters of Pinus sylvestris health condition and Ips acuminatus population in pure and mixed stands of Sumy region

2020 ◽  
pp. 131-140
Author(s):  
Valentyna Meshkova ◽  
Ivan Bobrov
Keyword(s):  
Scots Pine ◽  
Bark Beetles ◽  
Forest Health ◽  
Health Condition ◽  
State Enterprise ◽  
Forest Steppe ◽  
Population Parameters ◽  
Mixed Stands ◽  
Pine Stands ◽  
Scots Pine Stands

Outbreaks of bark beetles have increased in recent years in various regions. Pine engraver beetle (Ips acuminatus (Gyllenhal, 1827); Coleoptera: Curculionidae: Scolytinae) is most common in the pine forests of many European countries. Research on its biology and spread carried out in different natural conditions, phases of pest outbreak and considered various parameters to characterize the population of the pest and forest health condition. The aim of the research was to compare the health condition of Scots pine stands and population parameters of I. acuminatus in its two generations in pure and mixed stands in Polissya and Forest-steppe parts of Sumy region. Research was carried out in 2017 in the pure Scots pine stands and mixed stands with Scots pine and other forest species in Polissya (State Enterprise "Seredyno-Budsky Agroforest Economy"; State Enterprise "Seredyno-Budsky Forest Economy") and Forest-steppe parts (State Enterprise "Velykopysarivske Agroforest Economy"; State Enterprise "Okhtyrske Forest Economy") of Sumy region at 26 sample plots. In sample plots, parameters of forest health condition and bark beetle population were assessed in June and in September, after completion of development of spring and summer generation of I. acuminatus.  By most of the parameters assessed, significant differences between sample plots in Forest-Steppe and Polissya parts of Sumy region were not found. In pure Scots pine stands the mean area of bark beetles’ foci and bark beetles’ production were larger in Forest-steppe in June, and the density of Ips acuminatus nuptial chambers in June and September. In pure Scots pine stands the area of I. acuminatus focus, the number of colonized trees, the proportion of recently died trees, health condition indices, the density of egg galleries and nuptial chambers as well as young beetle’s production increased from June to September. In mixed stands the focus area, the number of colonized trees and health condition index increased insignificantly, and population parameters of I. acuminatus decreased from June to September. Pure Scots pine stands changed the health condition from "severely weakened" to "drying up" in three months, and mixed ones remained in the "weakened" category. In pure pine stands, the density of egg galleries and beetles of the young generation increased for three months from the lower limit of a moderate level to a high level, the density of nuptial chambers – from low to a high level. In mixed stands, all population parameters of I. acuminatus correspond to a low population level. The parameters characterizing the investigated foci of I. acuminatus in the Sumy region significantly correlated with the participation of pine in the stand composition, and in September the correlation is closer than in June. The data obtained indicate the feasibility of creating predominantly mixed pine stands.

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