scholarly journals Effects of bedrock and surficial deposit composition on moose damage in young forest stands in Finnish Lapland

Silva Fennica ◽  
2016 ◽  
Vol 50 (3) ◽  
Author(s):  
Teija Ruuhola ◽  
Ari Nikula ◽  
Nivala Vesa ◽  
Seppo Nevalainen ◽  
Juho Matala
Keyword(s):  
Forest Stands ◽  
Finnish Lapland ◽  
Young Forest ◽  
Surficial Deposit

scholarly journals SANITARY CONDITION OF PICEA ABIES (L. ) KARST. YOUNG FOREST STANDS DEPENDING ON THE SPATIAL SPECIFICITY

AGROFOR ◽  
2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Jelena RUBA ◽  
Olga MIEZITE ◽  
Imants LIEPA
Keyword(s):  
Risk Factors ◽  
Picea Abies ◽  
Tree Height ◽  
Impact Factors ◽  
Forest Stands ◽  
Sanitary Condition ◽  
Young Forest ◽  
Young Forests ◽  
Spatial Specificity ◽  
Sanitary State

As a result of nature resources intensive use, most of ecosystems have beenconverted. Anthropogenic impact includes changes of forest stands structure andtheir spatial specificity in the forest area. Accordingly the sanitary state of Norwayspruce young forest stands can be affected by different risk impact factors ofmanagement. The aim of the research was to analyze the spruce Picea abies (L. )Karst. young forest stands sanitary condition depending on forest plots spatialspecificity and location in the forest areas. The data were collected in 4 regions ofLatvia in spruce young forest stands (1 - 40 years old). The research was conductedin young natural and artificial stands (pure – 44, mixed – 42). In total 502 sampleplots with a total area of 28250 mwere installed. The particular plot size (25, 50,100 and 200 m) were selected depending on the stand average tree height, whiletheir number depended on the forest stand area. A total area of investigated foreststands were 127. 5 hectares. Results showed that the expression of spatial specificsdepended on risk factors and their intensity, as well as the environmentalcharacteristics. Damages caused by abiotic risk factors at different forest standswere not the same regarding intensity, nature and volume, but more or less closelywere related to all site conditions. Spatial specificity of forest stands area (regularand irregular), as well as their location in the forest massif significantly affects thespruce young forests sanitary status (respectively p=0. 027 and p=0. 002). Differentrisk factors damage to forests, bordering with spruce or pine young growths,cutovers and various types of infrastructure, were identified as much moreimportant.

scholarly journals Preliminary results of soil respiration in beech, spruce and grassy stands

2013 ◽  
Vol 59 (3) ◽  
Author(s):  
Tibor Priwitzer ◽  
Jozef Capuliak ◽  
Michal Bošela ◽  
Matej Schwarz
Keyword(s):  
Soil Respiration ◽  
Terrestrial Ecosystems ◽  
Forest Stands ◽  
Preliminary Results ◽  
Young Forest

AbstractSoil respiration constitutes the second largest flux of carbon between terrestrial ecosystems and the atmosphere. This study provides the preliminary results of soil respiration (Rs) observations in three different stands, including two types of young forest stands (beech and spruce) and grassy clearings. The average values of Rs ranged from 0.92 to 15.20 μmol CO

scholarly journals Impact of risk factor management on the sanitary condition of Norway spruce (Picea abies [L.] Karst.) pure stands in Latvia

2014 ◽  
Vol 60 (No. 5) ◽  
pp. 181-189
Author(s):  
J. Rūba ◽  
O. Miezīte ◽  
S. Luguza
Keyword(s):  
Risk Factors ◽  
Risk Factor ◽  
Spatial Structure ◽  
Health State ◽  
Anthropogenic Factor ◽  
Forest Stands ◽  
Risk Factor Management ◽  
Sanitary Condition ◽  
Young Forest ◽  
Empirical Material

In management of young forest stands, it is often the case in forestry that several risk factors, biotic, abiotic and anthropogenic ones, have to be dealt with. An anthropogenic factor is of great importance in management of forests, because humans, using ecosystems for their needs, still have to maintain the spatial structure of the forest and prevent the worsening of the health state. Covering all territory of Latvia, empirical material was gathered in 25 pure stands. To find out how neighbouring stands impact the young forest stands of spruce, the location in forest array was detected. In identifying the risk factors, attention should be paid to the shape of compartment and its location in forest array. A correlation between the occurrence and intensity of damage caused by cloven-hoofed game is relevant r<sub>fact </sub>= 0.988 &gt; r<sub>crit </sub>= 0.088 with 95% probability. Also the occurrence and intensity of Lophophacidium hyperboreum Lagerb., and damage by Heterobasidion spp. are relevant r<sub>fact </sub>= 0.991 &gt; r<sub>crit </sub>= 0.062 and r<sub>fact </sub>= 0.981 &gt; r<sub>crit </sub>= 0.088 with of 95% probability. &nbsp;

scholarly journals HEIGHT INCREMENT OF NATURALLY REGENERATED YOUNG FOREST STANDS OF SCOTS PINE PINUS SYLVESTRIS L. IN MYRTILLOSA FOREST SITE TYPE

2015 ◽  
Author(s):  
Olga MIEZĪTE ◽  
Ineta EGLĪTE ◽  
Solveiga LUGUZA ◽  
Imants LIEPA
Keyword(s):  
Health Status ◽  
Scots Pine ◽  
Initial Density ◽  
Stand Density ◽  
Forest Site ◽  
Height Increment ◽  
Forest Stands ◽  
Annual Increment ◽  
Site Type ◽  
Young Forest

One of the most important stand productivity and competition indicators is height annual increment, which is affected by various factors such as soil preparation, initial density as well as various management risk factors. Empirical material for the research was collected in the northern part of Latvia. In four pure Scots pine stands in Myrtillosa forest site type 29 circular plots tree diameter, height and the last five years annual height increment was measured and visual state of health was described. The aim of this research is to analyse Scots pine height annual increment in naturally regenerated young forest stands in Myrtillosa site type forest stands and to give an evaluation of the impact of the initial stand density and the health status on height growth. The mean height increment in studied stands is 0.26 ± 0.009 m and the average periodical increment is 0.37 ± 0.042 m. The annual height increment has been in the height range from 0.23 to 0.53 m. Initial stand density affects the annual height increment significantly. In the stand with an initial density of 5770 ± 961 trees the height increment during the last five years has risen by 36%, but in stand with initial density of 12,650 ± 1,581 trees (P = 51.8 % and R = 6.0 %) the height increment during the five-years period has increased by only 12 %. The tree health status does not affect the tree height increment significantly.

A two-stage method for horizontal point sampling in young forest stands

1988 ◽  
Vol 18 (10) ◽  
pp. 1340-1343 ◽  
Author(s):  
Kenneth M. Brown ◽  
Ancelm G. Mugasha
Keyword(s):  
Small Diameter ◽  
Computational Procedure ◽  
Principal Result ◽  
Necessary Condition ◽  
Forest Stands ◽  
Two Stage ◽  
Point Sampling ◽  
Sample Tree ◽  
Young Forest ◽  
Horizontal Point Sampling

Horizontal point sampling is sometimes difficult to use in dense stands of small-diameter stems because of poor visibility. One solution to this problem is to use vertical point sampling in the field to obtain a larger than necessary preliminary sample. The diameter and distance of each tree in the vertical point sample is measured, and then a computational procedure identical with horizontal point sampling is used to subsample the vertical point sample tree list. For the method to work, it is necessary that the horizontal point sampling criterion be at least as limiting in a certain sense as the vertical point sampling criterion. Our principal result is to show how this necessary condition can be met.

scholarly journals Ectomycorrhizal fungal communities in young forest stands regenerating after clearcut logging

2003 ◽  
Vol 157 (3) ◽  
pp. 399-422 ◽  
Author(s):  
Melanie D. Jones ◽  
Daniel M. Durall ◽  
John W. G. Cairney
Keyword(s):  
Fungal Communities ◽  
Forest Stands ◽  
Young Forest ◽  
Clearcut Logging
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