Journal of Forest Science, 2003 (vol. 49), issue 5

The role of root system in silver birch (Betula pendula Roth) dieback in the air-polluted area of Krušné hory Mts

O. Mauer, E. Palátová

J. For. Sci., 2003, 49(5):191-199 | DOI: 10.17221/4693-JFS  

120 root systems and trunks of 20 years old birch trees and 60 root systems and trunks of 15 years old birch trees affected by defoliation and with no visual symptoms of damage were analyzed in the air-polluted area of Krušné hory Mts. In the given area, birch develops a superficial or anchoring root system of circular shape. A greater effect of defoliation was recorded in trees with the superficial root system. The defoliation was in correlation with the extent of bole rot, root system rot and rooting depth. The proportion of root system branches infested by rot increased with increasing defoliation. Dominating fungi on roots were Armillaria gallica...

Hymenoptera (Aculeata) of spruce stands in the air-pollution region of Northern Bohemia

E. Kula, P. Tyrner

J. For. Sci., 2003, 49(5):200-207 | DOI: 10.17221/4694-JFS  

Using Moericke's yellow dishes we studied the Hymenoptera (Aculeata) fauna (with the exception of Formicoidea) in spruce (Picea abies) stands of the colder region of Northern Bohemia. We collected 103 species and the most important species in this spectrum were Vespula vulgaris (56.4%), Vespula rufa (4.7%), Dolichovespula norvegica (3.1%), Dolichovespula saxonica (4%), Nysson spinosus (1.8%), Andrena lappona (1.9%), Cleptes semiauratus (5.9%), Halictus sp. (6.7%) and Trypoxylon minus (2.2%). Comparisons made in 1990-1994 and 1995-1999 indicated a recession of...

Composition of psocid taxocenoses (Insecta: Psocoptera) in dependence on the level of naturalness of forest ecosystems in the Žďárské vrchy hills

P. Mückstein, O. Holuša

J. For. Sci., 2003, 49(5):208-219 | DOI: 10.17221/4695-JFS  

In 1999-2000 in the Protected Landscape Area (PLA) Žďárské vrchy hills the occurrence of psocids (Psocoptera) was studied in different types of biotopes: natural forest ecosystems (stands of Fagus sylvatica with individual admixture of Abies alba, Acer pseudoplatanus, Picea abies), changed forest ecosystems (monoculture of Picea abies), young plantations in forest stands, disperse forest vegetation (solitary trees), and also non-forest ecosystems - agrocenoses, meadows and grazing lands. A total of 10,560 adults in 20 species were found. Three groups of biotopes with specific psocid taxocenosis were found out by computed...

Prosperity of spruce plantation after application of dolomitic limestone powder

I. Kuneš

J. For. Sci., 2003, 49(5):220-228 | DOI: 10.17221/4696-JFS  

The subject of this paper was to assess the effects of pulverised dolomitic limestone applications on prosperity of Norway spruce (Picea abies L.) plantation and on the soil in extreme ecological conditions of the Jizerské hory Mts. The characteristics such as plant mortality, annual height increment, diameter of root collar (stem base diameter), crown diameter, nutrient analyses and some data from soil analyses are evaluated in this paper. An eleven-year period of observations is summarised. According to the observations and measurements carried out until now, the effect of limestone applications (1 kg per tree) on the spruce plantation prosperity...

Ecology of the capercaillie (Tetrao urogallus) and forest management in relation to its protection in the West Carpathians

M. Saniga

J. For. Sci., 2003, 49(5):229-239 | DOI: 10.17221/4697-JFS  

Ecology of capercaillie (Tetrao urogallus) was studied in the mountains of Central Slovakia (West Carpathians) in 1981-2003. In the studied area, the capercaillie population inhabited especially old natural forests (100-250 years old) in the spruce-beech-fir (850-1,270 m a.s.l.) and spruce (1,250-1,530 m a.s.l.) vegetation zones. The overstorey stand age ranged between 80 and 250 years with the mean of 128 years. The understorey stand age ranged from 10 to 60 years. The overstorey tree density ranged between 200 and 1,050 stems per ha (mean 725). The understorey tree density ranged from 5 to 650 trees per ha (mean 290). Both males and females...