Journal of Forest Science, 2014 (vol. 60), issue 10
Attempt to define morphological parameters enabling sex determination of Ips typographus (Linaeus, 1758) (Coleoptera: Curculionidae: Scolytinae) using PCA and CLUOriginal Paper
M. Zahradníková
J. For. Sci., 2014, 60(10):401-405 | DOI: 10.17221/29/2014-JFS 
There are only two known methods for determining the sex of Ips typographus (L.) - dissection that cannot be used with live beetles and by distinguishing between the density of the hairs on the head, a less reliable method that requires experienced personnel. As a result, we have sought to find a more reliable method of sex determination for I. typographus which can be used with live specimens but is still reliable and easy to conduct. The aim of the article is to explore the inner structure in data from measurements of morphological parameters of spruce bark beetles and to find correlations which could be used for sex determination....
An influence of different thinning methods on qualitative wood production of European beech (Fagus sylvatica L.) on two eutrophic sites in the Western CarpathiansOriginal Paper
I. Štefančík, M. Bošeľa
J. For. Sci., 2014, 60(10):406-416 | DOI: 10.17221/35/2014-JFS
The issues related to appropriate management methods of beech stands have been considered as a crucial topic from the past up to now. Although the positive effect of tending on wood quality in beech stands is a generally known fact, the results from long-term experiments are very scarce. We investigated the qualitative production of beech forests, treated by different thinning methods during a long-term period of 53 years. For this purpose two long-term (lasting 53 years with a measurement interval of 5 years) series of research plots were used. On each plot three different thinning methods were applied: i) heavy thinning from below (C-grade according...
Stand-replacing disturbance does not directly alter the succession of Norway spruce regeneration on dead woodOriginal Paper
J. Červenka, R. Bače, M. Svoboda
J. For. Sci., 2014, 60(10):417-424 | DOI: 10.17221/43/2014-JFS
Density of regeneration in European subalpine Norway spruce (Picea abies) forests is typically low with regeneration primarily located on dead or decaying wood. The post-disturbance development of this regeneration is crucial for natural forest succession. The aim was to identify the influence of disturbance on regeneration on decaying logs immediately after a severe disturbance event. Study plots were established in two subalpine spruce forests: the first, an undisturbed site located in the Hrubý Jeseník Mts. and the second site in the Šumava Mts. that has experienced recent severe disturbance. Regeneration density increased between 2008...
Tensile strength and cellulose content of Persian ironwood (Parrotia persica) roots as bioengineering materialOriginal Paper
E. Abdi, F. Azhdari, A. Abdulkhani, H. Soofi Mariv
J. For. Sci., 2014, 60(10):425-430 | DOI: 10.17221/44/2014-JFS
Unstable slopes create numerous problems for forest management and may destroy the road network and disturb access to forest. Soil bioengineering is a solution that can prevent these problems and reinforce the hillslope. Persian ironwood is considered as a good protective species for hillslope stability in Iran with an extensive lack of information about biotechnical properties. In this research the root strength of this species and also the relation between root diameter and cellulose content were investigated. The results showed that the mean tensile force and tensile strength were 99.70 ± 2.01 N and 173.23 ± 4.94 MPa, respectively,...
Forest management and snag characteristics in Northern Iran lowland forestsOriginal Paper
F. Tavankar, R. Picchio, A. Lo Monaco, A.E. Bonyad
J. For. Sci., 2014, 60(10):431-441 | DOI: 10.17221/77/2014-JFS
Some snag characteristics were studied in three different Hyrcanian lowland forests. The highest snag density (38.4 stem.ha-1) was found in fully protected forests, and it was significantly higher than in selectively logged (23.7 stem.ha-1) and open access forests (8.8 stem.ha-1). The snag volume, diameter and height were also significantly higher in the fully protected forests. The number of snag species was recorded in fully protected (9), selectively logged (5) and open access forests (4). The snags were more evenly distributed among diameter, height and decay classes in the fully protected forest. The larger diameter...