Journal of Forest Science, 2017 (vol. 63), issue 6

The influence of deforestation and anthropogenic activities on runoff generationOriginal Paper

Mohammad Reza KHALEGHI

J. For. Sci., 2017, 63(6):245-253 | DOI: 10.17221/130/2016-JFS  

In recent decades, due to rapid human population increases and in its results, destructive effects of anthropogenic activities on natural resources have become a great challenge. Land use and vegetation are important factors in soil erosion and runoff generation. This study was performed to assess the effects of different amounts of forest cover on the control of runoff and soil loss in the Talar basin, which is located in Mazandaran province, using a runoffrainfall model, geographical information system (GIS) and remote sensing (RS) to determine the hydrologic effects of deforestation on the Talar watershed (north of Iran). A runoff-rainfall model...

Importance of the first thinning in young mixed Norway spruce and European beech standsOriginal Paper

Jiří NOVÁK, David DUŠEK, Marian SLODIČÁK, Dušan KACÁLEK

J. For. Sci., 2017, 63(6):254-262 | DOI: 10.17221/5/2017-JFS  

Experimental results from the first thinning in mixed stands are not broadly experienced by forestry practice. To extend the experience with the thinning of a mixed stand, we studied thinned and unthinned mixtures of Norway spruce with European beech on two study sites in the Czech Republic, which represented different conditions: Všeteč (age of 19-35 years) - originally beech dominated site at 440 m a.s.l. and Deštné (age of 17-33 years) - originally spruce with beech site at 990 m a.s.l. Spruce and beech were mixed individually or in small groups. As the for number of trees, mixtures were 35-54% beech and 46-65% spruce at a lower altitude and 7-30%...

Results of Czech ash provenance experimentOriginal Paper

Václav BURIÁNEK, Petr NOVOTNÝ, Jaroslav DOSTÁL

J. For. Sci., 2017, 63(6):263-274 | DOI: 10.17221/11/2017-JFS  

This study is focused on testing progenies of common and narrow-leaved ash based on the measurement of provenance trial plots established in various forest regions under different site conditions within the Czech Republic in the spring of 1999. Height and diameter growth of 35 provenances was measured and evaluated at the stand age of 10-14 years. The main goal of this research is to analyse and compare differences in growth between progenies originating from alluvial versus scree habitats as well as between the two evaluated ash species. Moreover, the influence of localities on growth was tested using standard provenances planted on all plots. The...

Variability in leaf and crown morphology correlated with light availability in five natural populations of Quercus castaneifolia C.A. MeyOriginal Paper

Fariba BABAEI, Seyed Gholamali JALALI, Hormoz SOHRABI, Anoshirvan SHIRVANY

J. For. Sci., 2017, 63(6):275-281 | DOI: 10.17221/138/2016-JFS  

In this study, we investigate seedlings of Quercus castaneifolia C.A. Mey, from five different provenances for the research on leaf and crown morphological variations in relation to a light gradient under controlled conditions in a greenhouse. The results show that significant variations occurred in many parameters due to the effects of light availability. The seedling responses to low light include the proportional allocation of more biomass to leaves, leading to higher leaf mass, leaf area, crown area, specific leaf area and leaf area ratio, in contrast, the seedlings grown in high irradiance faced a high temperature resulting in higher...

Assessment of root-shoot ratio biomass and carbon storage of Quercus brantii Lindl. in the central Zagros forests of IranOriginal Paper

Yousef ASKARI, Ali SOLTANI, Reza AKHAVAN, Pejman TAHMASEBI KOHYANI

J. For. Sci., 2017, 63(6):282-289 | DOI: 10.17221/122/2015-JFS  

Assessment of carbon storage build-up in tree stems is a difficult task due to the lack of information on their carbon sequestration potential and allocation in different components. Similarly, high cost and complex methodology for accurate belowground biomass estimation make it in particular problematic. To this end, 18 Persian oak (Quercus brantii Lindley) trees from two growth forms in western Iran were destructively sampled to develop biomass and carbon mass prediction. Sampling covered a range of ages (40-145-year-old), sizes (DBH 7-38 cm) and mean crown diameter (1.9-8.55 m). We examined biomass proportion and carbon sequestration quantity...

First observations on the breeding ecology of invasive Dryocoetes himalayensis Strohmeyer, 1908 (Coleoptera: Curculionidae: Scolytinae) in its introduced range in Europe - Short communicationShort Communication

Jiří FOIT, Josef KAŠÁK, Tomáš MÁJEK, Miloš KNÍŽEK, Gernot HOCH, Gottfried STEYRER

J. For. Sci., 2017, 63(6):290-292 | DOI: 10.17221/3/2017-JFS  

The invasive bark beetle species Dryocoetes himalayensis Strohmeyer, 1908, originated from Himalayan regions, arrived in Europe in the 1970s, and is now considered to be established in several European countries (Czech Republic, France and Switzerland). This species is reported to develop in walnut (Juglans regia Linnaeus) and pear (Pyrus lanata D. Don) in the region of its origin; however, to date, there has been no information regarding its host trees and breeding ecology in its introduced range. The present paper reports the development of D. himalayensis in declining black walnut trees (Juglans nigra...