Journal of Forest Science, 2010 (vol. 56), issue 11
Development of forest soils in the Krkonoše Mts. in the period 1980-2009
K. Matějka, S. Vacek, V. Podrázský
J. For. Sci., 2010, 56(11):485-504 | DOI: 10.17221/79/2010-JFS 
This paper documents the development of soil conditions in the set of 32 permanent research plots in the Krkonoše (Giant) Mts. These plots represent an altitudinal gradient covering the ecosystems of beech, mixed beech-spruce and spruce stands. In all plots, representing the site conditions of the highest areas of the mountain range, standard soil pits were prepared and the soil sampling was performed in autumn of years 1980, 1993, 1998, 2003 and 2009. The results reflect extreme site conditions, soil acidification, large scale surface liming and in minor extent also different tree species composition of the stands. The general type of the soil-genesis...
State and development of phytocenoses on research plots in the Krkonoše Mts. forest stands
S. Vacek, K. Matějka
J. For. Sci., 2010, 56(11):505-517 | DOI: 10.17221/127/2010-JFS
The paper assesses the state and development of phytocenoses in beech, mixed and spruce stands on permanent research plots (PRP) 1-32 in the Krkonoše (Giant) Mts. in the years 1980-2005, i.e. during the air-pollution calamity and afterwards. Dynamics (the extent of change) of the vegetation structure has been expressed as the overall change of species composition in comparison with the year 1980. The change was quantified using the Euclidean distance or as the change of the several first ordination axes (DCA 1-DCA 4). Species composition was significantly changing on all 32 PRP stands in the period 1980-2005; some species completely disappeared (e.g....
Structure and development of forest stands on permanent research plots in the Krkonoše Mts.
S. Vacek, Z. Vacek, L. Bílek, I. Nosková, O. Schwarz
J. For. Sci., 2010, 56(11):518-530 | DOI: 10.17221/73/2010-JFS
The research is focused on structure and development of forest stands from 5th to 8th forest vegetation zone in the Krkonoše Mts. The forest stand diversity according to tree species composition and representation, horizontal and vertical structure was evaluated by using following indices: Clark-Evans aggregation index (Clark, Evans 1954), standardised Arten-profil index (Pretsch 2005) and index of complex diversity after Jaehne, Dohrenbusch (1997). Growth model SIBYLA (Fabrika, Ďurský 2005) was used for visualizations and growth predictions of forest stands on particular plots. Based on research results, management recommendations were evaluated.
Horizontal structure of forest stands on permanent research plots in the Krkonoše Mts. and its development
D. Zahradník, S. Vacek, L. Bílek, I. Nosková, Z. Vacek
J. For. Sci., 2010, 56(11):531-540 | DOI: 10.17221/126/2010-JFS
Horizontal structure on 38 permanent research plots is described for juvenile growth and developmental phases (natural seeding, advance growth, plantations) and tree layer of a parent stand. Hopkins-Skellam index, Pielou-Mountford index, Clark-Evans index and Ripley's K-function were computed. The results are presented separately for beech stands, mixed stands, spruce stands, stands in the timberline ecotone and relict pinewood. The numbers and distribution of natural and combined regeneration recruits are mostly sufficient from the aspect of ecological, environmental and production functions of forest. The horizontal structure of juvenile growth and...
Regeneration of forest stands on permanent research plots in the Krkonoše Mts.
S. Vacek, I. Nosková, L. Bílek, Z. Vacek, O. Schwarz
J. For. Sci., 2010, 56(11):541-554 | DOI: 10.17221/65/2010-JFS
The article describes natural, combined and artificial regeneration on 38 permanent research plots in both Czech and Polish part of the Krkonoše Mts. The attention is paid to species composition, spatial (horizontal and vertical) and age structure of forest regeneration according to different stand and site conditions. Concerning the structure and dynamics of forest stands and their regeneration, the potential and prospects of regeneration according to particular developmental stages and stand types (beech stands; mixed stands: spruce-beech, fir-beech, spruce-fir-beech; spruce stands, stands in the ecotone of the upper forest limit and relict pine...
Health status of forest stands on permanent research plots in the Krkonoše Mts.
S. Vacek, K. Matějka
J. For. Sci., 2010, 56(11):555-569 | DOI: 10.17221/128/2010-JFS
Damage to beech, mixed (beech with spruce to spruce with beech) and spruce stands in the Krkonoše Mts. is described on the basis of evaluation of transition matrices describing the probability of a change in the assessment of defoliation of particular trees in defoliation classes. The condition and development of health status were evaluated in the long run on PRP 1-32 in the Krkonoše Mts. by foliage and degrees of defoliation. Features describing the health status of the tree crown (damage by snow, frost, wood-decaying fungi, and insects) were also evaluated. Average defoliation, standard deviation of defoliation, estimation of minimum defoliation,...