scholarly journals Estimation of aboveground biomass, stand density, and biomass growth per year in the past using stand reconstruction technique in black spruce and Scots pine in boreal forest

Polar Science ◽  
2021 ◽  
pp. 100787
Author(s):  
Mouctar Kamara ◽  
Said Mohamed Said
Keyword(s):  
Boreal Forest ◽  
Scots Pine ◽  
Aboveground Biomass ◽  
Black Spruce ◽  
Stand Density ◽  
Reconstruction Technique ◽  
Biomass Growth ◽  
The Past ◽  
Density And Biomass

scholarly journals Aboveground Carbon Content and Storage in Mature Scots Pine Stands of Different Densities

Forests ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 240 ◽  
Author(s):  
Andrzej Węgiel ◽  
Krzysztof Polowy
Keyword(s):  
Carbon Content ◽  
Scots Pine ◽  
Aboveground Biomass ◽  
Stand Density ◽  
Carbon Accumulation ◽  
Continuous Increase ◽  
Stem Wood ◽  
Pine Stands ◽  
And Storage ◽  
Scots Pine Stands

Background and Objectives: The continuous increase in the amount of atmospheric CO2 is a factor that significantly contributes to global warming. Forests can be used to mitigate climate change by absorbing carbon and storing it. Scots pine (Pinus sylvestris L.) is the most abundant tree species in Polish forests and can substantially aid carbon accumulation. The aim of the study was to determine the carbon content in the dry mass of various parts of Scots pine trees and to evaluate the relationship between the accumulation of carbon in aboveground tree biomass and some stand parameters. Materials and Methods: The research was carried out in 20 even-aged (81–90 years old) Scots pine stands in northwestern Poland (Drawno Forest District). The densities of these stands ranged from 476 to 836 trees per hectare. The aboveground biomass was calculated as the sum of the following tree compartments: stem (wood and bark), dead branches, thick branches, thin branches and needles. The carbon content and storage in these compartments was determined. Results: The mean carbon content was lowest in stem wood (47.0%) and highest in needles (50.3%). No correlation between the stand density and the level of carbon stored in the aboveground biomass of Scots pines was found.

scholarly journals Macronutrient Stocks in Scots Pine Stands of Different Densities

Forests ◽  
2018 ◽  
Vol 9 (10) ◽  
pp. 593 ◽  
Author(s):  
Andrzej Węgiel ◽  
Ernest Bielinis ◽  
Krzysztof Polowy
Keyword(s):  
Scots Pine ◽  
Aboveground Biomass ◽  
Nutrient Balance ◽  
Stand Density ◽  
Nutrient Balances ◽  
Calcium Magnesium ◽  
Phosphorus And Potassium ◽  
Whole Tree Harvesting ◽  
Nitrogen Phosphorus ◽  
Whole Tree

A positive nutrient balance is crucial to sustaining forest productivity. Differences in stand densities usually mean different aboveground biomass stocks and different proportions of tree compartments. These differences can be reflected in the different macronutrient stocks between stands of different densities, because various tree compartments have different element concentrations. In this study, 82-year-old stands of Scots pine were compared, and specifically, the concentrations of the elements in tree compartments and the amounts of macronutrients in aboveground biomass were compared. The nutrients considered in this study were nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur. A positive correlation between stand density and the level of stored macronutrients was found for nitrogen, phosphorus, and potassium. This result means that forest managers can influence nutrient balances by regulating stand densities or by harvesting methods (SOH: stem-only harvesting or WTH: whole-tree harvesting).

Baumartenwechsel in den Walliser Waldföhrenwäldern verstärkt nach grossen Störungen

2018 ◽  
Vol 169 (5) ◽  
pp. 260-268 ◽  
Author(s):  
Thomas Wohlgemuth ◽  
Violette Doublet ◽  
Cynthia Nussbaumer ◽  
Linda Feichtinger ◽  
Andreas Rigling
Keyword(s):  
Scots Pine ◽  
Forest Fire ◽  
Tree Regeneration ◽  
Fire Disturbance ◽  
Pine Forests ◽  
The Past ◽  
Vegetation Shift ◽  
Tree Demography ◽  
Scots Pine Forests ◽  
High Share

Vegetation shift in Scots pine forests in the Valais accelerated by large disturbances In the past dozen years, several studies have concluded a vegetation shift from Scots pine to oak (pubescent and sessile) forests in the low elevated zones of the Valais. It is, however, not fully clear in which way such a vegetation shift actually occurs and on which processes such a shift would be based. Two studies, one on the tree demography in the intact Pfynwald and the other on the tree regeneration on the large Leuk forest fire patch, serve to discuss different aspects of the shift from Scots pine to oak. The forest stands of Pfynwald consist of 67% Scots pines and 14% oaks. Regenerating trees are 2–3.5 times more frequent in small gaps than under canopy. In gaps of the Upper Pfynwald, seedlings and saplings of Scots pine are three times more abundant than oaks, while both species regenerate in similar quantities under canopy. In the Lower Pfynwald, young oaks – especially seedlings – are more frequent than Scots pines. A different process is going on at the lower part in the Leuk forest fire patch where Scots pines prevailed before the burn of 2003. While Scots pines regenerate exclusively close to the edge of the intact forest, oaks not only resprout from trunk but also profit from unlimited spreading of their seeds by the Eurasian jay. Regeneration from seeds are hence observed in the whole studied area, independent of the proximity of seed trees. After the large fire disturbance, a mixed forests with a high share of oaks is establishing, which translates to a rapid vegetation shift. The two trajectories are discussed in the light of climate change.

scholarly journals Newtonian boreal forest ecology: The Scots pine ecosystem as an example

PLoS ONE ◽  
2017 ◽  
Vol 12 (6) ◽  
pp. e0177927 ◽  
Author(s):  
Pertti Hari ◽  
Tuomas Aakala ◽  
Juho Aalto ◽  
Jaana Bäck ◽  
Jaakko Hollmén ◽  
...  
Keyword(s):  
Boreal Forest ◽  
Scots Pine ◽  
Forest Ecology

Common‐garden experiment reveals clinal trends of bud phenology in black spruce populations from a latitudinal gradient in the boreal forest

2021 ◽  
Author(s):  
Xiali Guo ◽  
Marcin Klisz ◽  
Radosław Puchałka ◽  
Roberto Silvestro ◽  
Patrick Faubert ◽  
...  
Keyword(s):  
Boreal Forest ◽  
Latitudinal Gradient ◽  
Black Spruce ◽  
Common Garden ◽  
Common Garden Experiment ◽  
Bud Phenology

scholarly journals Species specific growth responses of black spruce and trembling aspen may enhance resilience of boreal forest to climate change

2012 ◽  
Vol 101 (1) ◽  
pp. 231-242 ◽  
Author(s):  
Igor Drobyshev ◽  
Sylvie Gewehr ◽  
Frank Berninger ◽  
Yves Bergeron
Keyword(s):  
Climate Change ◽  
Boreal Forest ◽  
Specific Growth ◽  
Black Spruce ◽  
Trembling Aspen ◽  
Growth Responses ◽  
Species Specific
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