Journal of Forest Science, 2009 (vol. 55), issue 5
Development of species composition in long term simulations with an individual-tree growth simulator
M. Huber, H. Sterba
J. For. Sci., 2009, 55(5):194-200 | DOI: 10.17221/14/2009-JFS 
The spruce-fir-beech dominated forest stands in Litschau in the Austrian part of the Bohemian Massif were converted by former forest management practices into pure Norway spruce stands and are now discussed to be reconverted into the potential natural vegetation type. The targeted potential natural vegetation type is usually defined by experts in vegetation sciences. Because meanwhile individual-tree growth simulators are a well acknowledged tool for predicting future forest stand development, in this study we investigate if PROGNAUS can also be used to predict the redevelopment of managed forest ecosystems into natural forest ecosystems regarding...
Dissolved organic carbon concentrations under conditions of different forestcomposition
M. Remeš, J. Kulhavý
J. For. Sci., 2009, 55(5):201-207 | DOI: 10.17221/16/2009-JFS
The study deals with the monitoring of dissolved organic carbon (DOC) concentrations in seepage water sampled from differently managed forest plots in the Drahanská vrchovina Upland. Simultaneously, the input of DOC in precipitation and throughfall is evaluated. Preliminary results show higher mobility level of carbon substances in forest soil in a pure spruce stand compared to mixed stand or a pure beech stand. DOC can be one of suitable characteristics to evaluate the conversion effectiveness of spruce monocultures.
Comparison of the impact of blue spruce and reed Calamagrostis villosa on forest soil chemical properties
O. Špulák, D. Dušek
J. For. Sci., 2009, 55(5):208-214 | DOI: 10.17221/17/2009-JFS
The impact of blue spruce (Picea pungens) and reed Calamagrostis villosa) cover on quantity and quality of upper soil layers was investigated. The research was conducted in the Jizerské hory Mts., Czech Republic (altitude 880 m, acidic spruce forest site type - 8K). Mean weight of dry matter of holorganic horizons was similar under both variants. Totally, there were accumulated 153 t/ha of dry matter of humus horizons in blue spruce and 174 t/ha in reed. Soil pH (KCl) varied from 3.7 to 3.2 under blue spruce stand and from 3.6 to 3.3 under reed. The differences of concentrations of nutrients (P, K, Ca, Mg) were not found significant either....
Humus conditions and stand characteristics of artificially established young stands in the process of the transformation of spruce monocultures
L. Menšík, T. Fabiánek, V. Tesař, J. Kulhavý
J. For. Sci., 2009, 55(5):215-223 | DOI: 10.17221/18/2009-JFS
The main reason for the transformation of spruce monocultures at sites of mixed broadleaved forests is to create more natural relationships between the species structure of a stand and soil processes. The presented study compares humus conditions and basic growth characteristics of two mixed stands (spruce with beech and larch with beech) aged 25 years with a beech stand (aged 40 years) and spruce stand (aged 30 years). The purpose of the study is to evaluate (i) forms of forest floor, (ii) soil reaction, (iii) the content and total reserves of carbon, nitrogen and C/N ratio, (iv) dissolved organic carbon (DOC) in relation...
Thinning experiment in the spruce and beech mixed stands on the locality naturally dominated by beech - growth, litter-fall and humus
J. Novák, M. Slodičák
J. For. Sci., 2009, 55(5):224-234 | DOI: 10.17221/20/2009-JFS
In 1997, long-term thinning experiment Všeteč in Southern Bohemia was established in the young 19-year-old mixed beech and spruce stand. Three variants (0.10 ha each) were investigated: 1 - control unthinned plot (only salvage cut was done), 2 - plot with positive selection from above and 3 - plot with negative selection from below. The aim of this paper is to evaluate the first results from the eleven-year investigation (at the age of 19-29 years) focused on the effect of thinning on growth, species composition, litter-fall and humus in young mixed stands in this experiment. Thinning (both variants) resulted in decreased salvage cut (dead, broken...
The first reaction of soil mite fauna (Acari, Mesostigmata) caused by conversion of Norway spruce stand in the Szklarska Poręba Forest District
M. Skorupski, G. Butkiewicz, A. Wierzbicka
J. For. Sci., 2009, 55(5):235-243 | DOI: 10.17221/19/2009-JFS
To observe the first reaction of Mesostigmata mites for conversion of even aged spruce stands under conversion with common beech and silver fir, four pairs of experimental plots directly neighbouring each other were examined. On the spruce stands that started to be converted into beech or fir stands a few years ago, some significant composition and quantitative changes can be observed as regards Mesostigmata order mites. The first reaction of Mesostigmata mites after starting of forest conversion was an increasing number of mite species in the plots. On the plots with relatively close occurrence of beech, increasing number of specimens was also observed...
Species composition in low mountain beech (Fagus sylvatica L.) stands in the Bieszczady National Park under the global warming
D. Sugiero, R. Jaszczak, G. Rączka, P. Strzeliński, A. Węgiel, A. Wierzbicka
J. For. Sci., 2009, 55(5):244-250 | DOI: 10.17221/15/2009-JFS
The author analyzes the changes in the tree species composition of Dentario glandulosae-Fagetum Klika 1927 em. Mat. 1964 in the mountain stands of Bieszczady National Park in 1993-2003. The analysis takes into account the changes over a ten-year period in the number and volume structure of each tree species in each stand layer: young natural regeneration, undergrowth, and mature stand. Additionally, after comparing the results with the natural Carpathian forests' structure, the adaptation level of the present tree species composition to the current climate and soil conditions, as well as probable directions of future changes have been assessed....