Journal of Forest Science, 2017 (vol. 63), issue 10
Assessment of plant biological diversity and soil characteristics in the pure ash tree stand and in mixture with beech (a case study of Lavij-Noor, Iran)Original Paper
Mohammad Reza POURMAJIDIAN, Hossein Kavian
J. For. Sci., 2017, 63(10):443-448 | DOI: 10.17221/81/2016-JFS 
The present study has been done to evaluate the impact of pure ash stand and mixed stand with beech on the herb layer biodiversity and soil properties in the forests of Noor city. There is a unique stand of ash in the forests of Noor city and at 1,900-2,100 m a.s.l., which is rarely seen like that in the northern forests of Iran. Shannon-Wiener diversity indices (H'), Simpson index of dominance (D), Margalef richness (R1) and Pielou's evenness were used to analyse biodiversity. Sampling was also conducted to investigate physical and chemical properties of soil (bulk density, acidity, electrical conductivity, soil moisture, soil lime, nitrogen...
Multivariate analysis for assessment of the tree populations based on dendrometric data with an example of similarity among Norway spruce subpopulationsOriginal Paper
Karel MATĚJKA
J. For. Sci., 2017, 63(10):449-456 | DOI: 10.17221/106/2016-JFS
The new method for evaluation of tree populations presented here is based on a correlation analysis within a set of dendrometric variables. The correlation analysis is carried out for each population separately. The method evaluates differences between resulting correlation matrices. These distances can be used by hierarchical cluster analysis (unweighted pair-group average) or by ordination analysis (non-metric multidimensional scaling - NMS). Test data were obtained in 10 research plots in the area of Medvědí Mt., Šumava National Park. Plots are located in Norway spruce [Picea abies (Linnaeus) H. Karsten] climax forests. The results enable...
Influence of site conditions and silvicultural practice on the wood density of Scots pine (Pinus sylvestris L.) - a case study from the Doksy locality, Czech RepublicOriginal Paper
Ondřej SCHÖNFELDER, Aleš ZEIDLER, Vlastimil BORŮVKA, Lukáš BÍLEK
J. For. Sci., 2017, 63(10):457-462 | DOI: 10.17221/62/2017-JFS
After spruce, the Scots pine (Pinus sylvestris Linnaeus) is the second most important commercial coniferous tree species in the Czech Republic. However, we are finding out that awareness of the variability of properties, and possibilities to affect them, are noticeably small for this type of tree species in our conditions. The goal of this study is to primarily evaluate the importance of site conditions, silvicultural measures and other factors for the density of Scots pine wood in the Doksy locality in the Czech Republic. The Doksy locality is represented by three forest stands with different silvicultural history. Samples were taken from...
Efficiency of sector sampling for estimating juniper forest attributes vs. fixed area plotOriginal Paper
Mohammad Hussein SERAJ, Bahman KIANI
J. For. Sci., 2017, 63(10):463-469 | DOI: 10.17221/22/2017-JFS
Juniper forests grow in mountain areas and many difficulties are encountered in their sampling. Sector sampling as an unbiased and cost-effective method was tested for the sampling of a 12.5-ha juniper forest. To begin with, a point-map of trees was created and 50 quadrats were determined systematically. Fixed area plots were measured within these 50 × 50 m quadrats. In each quadrat, eight sectors with 45° angle were determined. One-sector and two-sector scenarios randomly besides four-sector scenario systematically were conducted. Accuracy and precision of sampling methods were compared. Also, statistical analysis was conducted to compare sector sampling...
Soil fertility and productivity estimation of Pinus pinaster Aiton reforestations in Central and Northeast Chalcidice in Northern GreeceOriginal Paper
Katherine KARAMANOLI, Athanasios PAPAIOANNOU, Stella SOFOGIANNI
J. For. Sci., 2017, 63(10):470-475 | DOI: 10.17221/68/2017-JFS
Maritime pine (Pinus pinaster Aiton) is a notable fast-growing conifer, native to the Western Mediterranean Basin, which is considered suitable for reforestations. This tree species was artificially installed in Chalcidice, Northern Greece, about 40 years ago, in order to upgrade mountain ecosystems. The experiment reported in this paper was undertaken to estimate soil conditions and the development progress of maritime pine in the above reforestations. Samples of mineral soil and forest floor were taken from 12 different sites at 2 locations. Despite age, rather weak maritime pine trees are found in both studied locations. Furthermore, significant...
Evaluation of transformation from even-aged to selection forest by means of Gini indexOriginal Paper
Jan KADAVÝ, Michal KNEIFL, Barbora FEDOROVÁ, Jaroslav BARTŮNĚK
J. For. Sci., 2017, 63(10):476-484 | DOI: 10.17221/48/2017-JFS
We used the Gini index for evaluation of the 40-year transformation to selection forests in the Training Forest Enterprise Masaryk Forest Křtiny (Czech Republic). The Gini index values for particular forest stands were compared with the reference values derived from the diameter distribution model curve (type E) by Meyer. From a total of sixteen stands which were evaluated in 2013 (the last periodic inventory), only two stands reached the desired diameter structure. Four other stands reached the desired diameter structure at least once during the transformation period. We recommend the application of Gini index for determination of a success rate of...