THE CHARACTERISTICS OF FOREST UNDERSTOREY IN MYRTILLOSA MEL. FOREST SITE TYPE IN LATVIA

2019 ◽  
Author(s):  
Aigars Indriksons
Keyword(s):  
Forest Site ◽  
Site Type ◽  
Forest Understorey

scholarly journals Characteristics of chosen biometric features of European ash (Fraxinus excelsior L.) due to the age of trees and the forest site type

2020 ◽  
Vol 26 (1) ◽  
Author(s):  
Krzysztof Turczański ◽  
Katarzyna Kaźmierczak ◽  
Bogna Zawieja
Keyword(s):  
Strong Relationship ◽  
Floodplain Forest ◽  
Analysis Of Covariance ◽  
Forest Site ◽  
Diameter At Breast Height ◽  
Site Type ◽  
Breast Height ◽  
Biometric Features ◽  
European Ash ◽  
Site Types

The dieback of European ash contributes the disappearance of the species from the typical ash sites such as floodplain forests or alder-ash forests. The species occurs more often in moist broadleaved forests and fresh broadleaved forests. Therefore, the main objective of our study was to determine the influence of ash age and the forest site type on the chosen biometric features of dominant and codominant trees. We also aimed to compare the sizes of European ash growing in optimal forest site types with less fertile ones, where it does not occur as the main species. We collected the empirical material from 25 plots representing 4 forest site types: fresh broadleaved forest, moist broadleaved forest, floodplain forest, and alder-ash forest. The research plots were located in the Babki, Konstantynowo, and Łopuchówko Forest Districts, western Poland. The age of ash varied from 52 to 144 years. On each plot, we measured a tree height and a diameter at breast height of 15 dominant and codominant ash trees. Subsequently, we used measured features to calculate the volume of each tree. We carried out the analysis of covariance of diameter at breast height, height, and volume. The analysis showed the strong relationship of examined features with the age of the species and the forest site type. Furthermore, our results indicated the underestimation of the growth possibilities of European ash in fresh broadleaved forest and moist broadleaved forest. In these sites, ash achieved similar sizes in comparison to optimal forest site types, i.e. floodplain forest and alder-ash forest. This result cannot be omitted in forestry practice, especially in silviculture, which should aim to support the natural regeneration of European ash in differentiated site conditions. Keywords: European ash, forest site type, age of a tree, biometric features

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.

scholarly journals SOME PRINCIPLES OF FOREST SITE-TYPE CLASSIFICATION

1951 ◽  
Vol 27 (2) ◽  
pp. 157-163 ◽  
Author(s):  
A. Kabzems
Keyword(s):  
Forest Site ◽  
Site Type ◽  
Type Classification

scholarly journals Development and renewal-conditions of dune pine forests second growth in the lichen and cowberry site type in Southwest Estonia

2008 ◽  
Vol 49 (1) ◽  
pp. 47-58 ◽  
Author(s):  
Kadri Kõresaar ◽  
Priit Kõresaar ◽  
Malle Mandre
Keyword(s):  
Natural Regeneration ◽  
Unit Area ◽  
Dry Mass ◽  
Pine Forest ◽  
Pine Forests ◽  
Primary Data ◽  
Forest Site ◽  
Height Increment ◽  
Site Type ◽  
Second Growth

Edela-Eesti luitemetsade järelkasvu arengust ning uuenemistingimustest sambliku ja pohla kasvukohatüübis On the southwestern coast of Estonia dune pine forest covers approximately 3000 hectares. This area includes coastal pine forests. The dune pine forest natural renewal in Southwest Estonia is the object of research. The natural regeneration of Scots pine (Pinus sylvestris L.) at the cowberry site type and at the lichen site type are observed. The necessary observations were made and primary data were collected in 1999-2006 from 28 sample plots, wherefrom 16 were situated at the lichen and 12 at the cowberry site type. The aim of the present study was to find out how old stand and forest site type influences the growth of second growth (height, height increment, age and number of trees per unit area) and its morphological parameters (length of needles and shoots and their dry mass).

Diversity of polyporous fungi (Polyporaceae) in northern boreal forests: effects of forest site type and logging intensity

2004 ◽  
Vol 19 (2) ◽  
pp. 152-163 ◽  
Author(s):  
Anna-liisa. Sippola ◽  
Maarit Similä ◽  
Mikko Mönkkönen ◽  
Jukka Jokimäki
Keyword(s):  
Boreal Forests ◽  
Forest Site ◽  
Site Type

The Finnish forest site type approach: ordination and classification studies of mesic forest sites in southern Finland

Vegetatio ◽  
1990 ◽  
Vol 87 (1) ◽  
pp. 85-98 ◽  
Author(s):  
Tiina Tonteri ◽  
Juha -Pekka Hotanen ◽  
Jussi Kuusipalo
Keyword(s):  
Forest Site ◽  
Site Type ◽  
Mesic Forest ◽  
Forest Sites

Effect of vegetative competition on regeneration of white spruce

1981 ◽  
Vol 11 (1) ◽  
pp. 1-8 ◽  
Author(s):  
S. Eis
Keyword(s):  
Growing Season ◽  
White Spruce ◽  
Height Growth ◽  
Forest Site ◽  
Pioneer Species ◽  
Site Type ◽  
Rate Of Invasion ◽  
Site Types

The rate of invasion and height growth of vegetation in logged-over areas were studied on four forest site types in the white spruce – alpine fir (Piceaglauca (Moench) Voss – Abieslasiocarpa (Hook.) Nutt.) forests north of Prince George, B.C. On Cornus–Moss, Aralia–Dryopteris, and Devil's Club site types, which generally had full stocking, vegetation that grew under the canopy of trees was replaced after logging by aggressive pioneer species. Annuals were the first to invade the logged-over area, followed by biennials and perennials. The invasion of shrubs was the slowest. After logging, 6 or 7 years elapsed before vegetation became a serious hindrance to regeneration and, by that time, white spruce seedlings planted immediately after logging were tall enough to withstand competition. On the Alluvium site type, where stocking is usually open and shrubs and grasses that thrive in the logged-over areas are present, spruce seedlings were overtopped during the first growing season and eliminated as the density of shrubs increased.

Ecological gradients of boreal forests in South Finland: an ordination test of Cajander's forest site type theory

Vegetatio ◽  
1987 ◽  
Vol 68 (3) ◽  
pp. 145-156 ◽  
Author(s):  
Tapani Lahti ◽  
Risto A. V�is�nen
Keyword(s):  
Type Theory ◽  
Boreal Forests ◽  
Forest Site ◽  
Ecological Gradients ◽  
Site Type

scholarly journals SUCCESSION OF GROUND COVER VEGETATION IN HYLOCOMIOSA FOREST SITE TYPE AFTER THE CLEARCUT

2018 ◽  
Author(s):  
Edgars DUBROVSKIS ◽  
Aigars INDRIKSONS ◽  
Olga MIEZĪTE ◽  
Lelde HERMANE
Keyword(s):  
Biological Diversity ◽  
Ground Cover ◽  
Stand Age ◽  
Individual Species ◽  
Ecological Indicator ◽  
Forest Site ◽  
Clear Cut ◽  
Site Type ◽  
Mature Stand ◽  
Ground Cover Vegetation

Nowadays forestry sector uses forest site type descriptions developed from beginning of 20th century till 1980’s and descriptions are obtained for pre-mature and mature stand age. There is less information about ground cover vegetation for full rotation cycle. In this research has been gathered information about ground cover vegetation succession in first 5 years after clear cut in mature Scots pine stand. The chronosequence method was used. The Brown-Blanquet and the point-square methods for accounting of ground cover plants were used. The ecological values of Ellenberg for describing the environmental status and the coefficient of Tschekanovsky for estimation of the difference between plant communities in forest young growths of different age were used. The biological diversity of species in this research compared to mature stand also is increasing. Ellenberg’s ecological indicator values as light and nitrogen are also increasing: nitrogen value has increased the most - by 2.62 units. There are registered changes in vascular plants, mosses, lichens and trees projective covering’s proportion. The most significant changes in individual species occurrence are between the second and third year's (Tschekanovsky coefficient = 0.19). Five years after clear cut the Tschekanovsky coefficient between the mature stand and five years old clearing is 0.18. In the 4th and 5th year after the clear cut there increase the projective cover of Monocotyledonae plants (families Graminaea and Cyperaceae) forming higher vertical structure and overtaking the dominance from another groups. The results obtained in this research promote further research in different stand age.

scholarly journals Risk model of tree stand damage by winds and its evaluation based on damage caused by cyclone “Xaver”

2018 ◽  
Vol 27 (2) ◽  
pp. e014
Author(s):  
Arkadiusz Bruchwald ◽  
Elżbieta Dmyterko ◽  
Radomir Balazy
Keyword(s):  
Risk Model ◽  
Stand Density ◽  
Forest Site ◽  
Tree Stand ◽  
Digital Map ◽  
Site Type ◽  
High Prediction ◽  
Stand Damage ◽  
Average Size ◽  
Forest District

Aim of study: To develop and evaluate the forest’s wind-risk model, dedicated for stand damage level.Area of study: Model was tested in the northeastern Poland.Material and methods: A risk model referring to the damage of forest stands by wind specifies, for every stand in a selected forest district, the risk factor within the range of 0 to 3. The higher value of the factor, the greater risk of damage, if wind occurs. The model was based on 11 features: average size of a tree stand, mean diameter breast high in the specified features’ ratio, species composition, degree of stand density, age of stand, forest site type, amount of damage caused by wind in the last 10-year period, location of forest district in the region of Poland, and three features for mountains: stand’s altitude above sea level, direction, and slope. The model used information from the State Forests’ Information System database (SILP), and since it was developed in JAVA computer language, the processing of data for one forest district lasted less than one minute.Main results: The model can create a forest district digital map, in which stands characterized by specific risk values are presented with high prediction accuracy.Research highlights: The risk model of tree stand damage by winds uses data provided by the SILP and what was proven in below study, can be used as an effective tool in a forestry practice.

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