Spatial analysis of density dependent pattern in coniferous forest stands

Vegetatio ◽  
1985 ◽  
Vol 64 (1) ◽  
pp. 29-36 ◽  
Author(s):  
Janet Franklin ◽  
Joel Michaelsen ◽  
Alan H. Strahler
Keyword(s):  
Spatial Analysis ◽  
Coniferous Forest ◽  
Forest Stands ◽  
Density Dependent

scholarly journals Forest soil resources analysis in north-eastern Moscow region based on geoinformation technologies

2020 ◽  
Vol 24 (5) ◽  
pp. 39-50
Author(s):  
A.N. Maksimova ◽  
◽  
V.N. Karminov ◽  
O.V. Martynenko ◽  
P.V. Ontikov ◽  
...  
Keyword(s):  
Spatial Analysis ◽  
Coniferous Forest ◽  
Natural Fertility ◽  
Forest Stands ◽  
Soil Resources ◽  
Podzolic Soils ◽  
Geoinformation Technologies ◽  
North Eastern ◽  
Noticeable Improvement ◽  
Effective Use

The results of processing and analysis of spatial and temporal information about soils and forest stands on geoinformation technologies are presented. Spatial analysis of combined soil and forestry data showed that the most productive plantings were confined to sod-podzolic automorphic soils. In the main coniferous forest-forming species, such as European spruce and pine, when signs of hydromorphism appear, productivity significantly decreases. Among the studied plantings, the lowest-yielding ones are formed on swamp-podzolic soils. Retrospective analysis revealed a noticeable improvement in productivity and breed composition that occurred in the late 1970s and early 1980s. The assessment of the current situation shows that there is a certain reserve for increasing the productivity of existing forest stands, associated with a more effective use of the natural fertility of forest soils.

Natural regeneration determines wintering bird presence in wind-damaged coniferous forest stands independent of postdisturbance logging

2015 ◽  
Vol 45 (9) ◽  
pp. 1232-1237 ◽  
Author(s):  
Sinja A.B. Werner ◽  
Jörg Müller ◽  
Marco Heurich ◽  
Simon Thorn
Keyword(s):  
Natural Regeneration ◽  
Mixed Model ◽  
Linear Mixed Model ◽  
Economic Value ◽  
Coniferous Forest ◽  
Bird Species ◽  
Forest Stands ◽  
Bird Abundance ◽  
Coniferous Trees ◽  
Mature Forest

Natural disturbances in European production forests are undesired from an economic perspective but are important drivers of biodiversity. The removal of damaged timber to restore economic value is accompanied by negative effects on various species groups, particularly breeding bird communities, and can hinder natural regeneration. However, little is known about the effect of postdisturbance logging on bird assemblages in winter when temperatures are low and food resources are unpredictable. We conducted fixed-radius point counts of wintering birds in forest stands logged or unlogged after windthrows and in mature forest stands to test our predictions that bird species densities and abundances (i) are lower in postdisturbance logged stands and (ii) depend on the amount of natural regeneration, (iii) which differs between logged and unlogged stands. Our generalized linear mixed model did not support the expected differences in bird abundance or species densities between postdisturbance logged and unlogged stands but indicated that mature forest stands harbor the highest bird abundances and species densities. The number of regenerated coniferous trees significantly positively affected wintering bird abundances in both postdisturbance logged and unlogged stands. Hence, the number of coniferous trees appears to be a main predictor of wintering bird presence.

METODY PROWADZENIA ODNOWIEŃ NATURALNYCH SOSNY ZWYCZAJNEJ (PINUS SYLVESTRIS L.) W NADLEŚNICTWIE SKWIERZYNA

2020 ◽  
Vol XIII ◽  
pp. 1-1
Author(s):  
Maciej Hałuszczak
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Natural Regeneration ◽  
Coniferous Forest ◽  
Basic Method ◽  
Forest Stands ◽  
Clear Cutting ◽  
Forest District

For many years, the Skwierzyna Forest District has been a leader among 35 units of the Regional Directorate of State Forests in Szczecin in terms of the area of the obtained natural regeneration of Scots pine. In the Skwierzyna Forest District in the period 2010-2018, 522.93 ha of natural regeneration was recognized, which constitutes 43% of the total regeneration, the habitat of fresh mixed coniferous forest and fresh coniferous forest as optimal for obtaining regeneration of the natural pine. In the spring date of plowing, the forest plow LPz-75 is applied, as the best for obtaining satisfactory self-seeding. The basic method of natural regeneration of pine in the Skwierzyna Forest Inspectorate is the use of a strip-like clear cutting (Ib) in the form of classic narrow sheds, with a cutting width of up to 60 m. It is noteworthy that in the woodcutting the under-eaves undergrowths, arising in forest stands close to the harvest, are left intact and later used within the naturally renovated area.

Seed banks in five boreal forest stands originating between 1810 and 1963

1982 ◽  
Vol 60 (9) ◽  
pp. 1815-1821 ◽  
Author(s):  
Anders Granström
Keyword(s):  
Boreal Forest ◽  
Plant Species ◽  
Mineral Soil ◽  
Coniferous Forest ◽  
Soil Samples ◽  
Distribution Data ◽  
Forest Stands ◽  
Humus Layer ◽  
Seed Content ◽  
Organic Horizons

The viable seed content of soil samples from five coniferous forest stands in northern Sweden, aged 16–169 years, was determined by means of germination trials. The soil samples were separated into five fractions: three organic horizons and two mineral soil horizons. Seedlings of 15 phanerogam species emerged, representing densities of 239–763 seeds/m2 in the soils from the different stands. The depth distributions of the seeds varied with both plant species and forest stand. Most seeds were found at various depths in the humus layer, but in one stand an appreciable seed density of Luzula pilosa was present in the mineral soil. Most of the seedlings belonged to plant species present in the vegetation or with good means of dispersal. The depth distribution data, however, suggest that Luzula pilosa in particular may have a persistent seed bank. The role of persistent seeds in the vegetational composition of the boreal forest is discussed.

Foraging ecology of black-backed woodpeckers (Picoides arcticus) in unburned eastern boreal forest stands

2010 ◽  
Vol 40 (5) ◽  
pp. 991-999 ◽  
Author(s):  
Junior A. Tremblay ◽  
Jacques Ibarzabal ◽  
Jean-Pierre L. Savard
Keyword(s):  
Boreal Forest ◽  
Foraging Ecology ◽  
Radio Telemetry ◽  
Woody Debris ◽  
Continuous Production ◽  
Coniferous Forest ◽  
Insect Outbreaks ◽  
Forest Stands ◽  
Picoides Arcticus ◽  
Downed Woody Debris

Managed coniferous forest dominates much of the black-backed woodpecker’s ( Picoides arcticus Swainson) breeding range. Despite this, little is known about the fine-scale foraging behaviour of this focal species in unburned managed forest stands in the absence of insect outbreaks. To investigate the foraging substrates used in such a habitat, we employed radio-telemetry to track a total of 27 black-backed woodpeckers. During two successive summers (2005–2006), 279 foraging observations were recorded, most of which were on dying trees, snags, and downed woody debris. Individuals frequently foraged by excavation, suggesting that in the absence of insect outbreaks the black-backed woodpecker forages mainly by drilling. The majority of foraging events occurred on recently dead snags with a mean dbh (±SE) of 18.3 ± 0.4 cm. Our results suggest that in unburned boreal forest stands, substrate diameter and decay class are important predictors of suitable foraging substrates for black-backed woodpeckers. We suggest that conservation efforts aimed at maintaining this dead-wood dependent cavity nesting species within the landscape, should endeavour to maintain 100 ha patches of old-growth coniferous forest. This would ensure the continuous production of a sufficient quantity of recently dead or dying trees to meet the foraging needs of this species.

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