Search results: 140 results (approx.)

1. Quantitative and qualitative features of soil humus in mountain treeline ecosystems.

The ecosystems in treeline mountainous regions are considered as vulnerable to climate change, since these areas will experience stronger temperature fluctuations at regional scale than the global climate and are exposed to different intensity of land use and to land use change, both affecting...

Author(s) : Zhiyanski, M.; Glushkova, M.; Kirova, L.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2017 Vol.18 No.1 pp.5-23 ref.many

2. Compaction of forest soils with heavy logging machinery.

The paper investigated the effects of ground-based skidding on soil physical properties. For this purpose, soil disturbance following skidding was assessed for four levels of traffic intensity and three levels of slope gradients; each combination replicated three times. Soil samples were collected...

Author(s) : Naghdi, R.; Solgi, A.; Zenner, E. K.; Najafi, A.; Salehi, A.; Nikooy, M.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2017 Vol.18 No.1 pp.25-39 ref.31

3. Structure of egg clusters and egg parasitism characteristics of Thaumetopoea solitaria (Freyer) (Lepidoptera: Notodontidae) in the Eastern Rhodopes, Bulgaria.

Egg structure and main characteristics of egg parasitism of pistachio processionary moth (Thaumetopoea solitaria) were studied in six sites in the Eastern Rhodopes in Bulgaria. The results showed that T. solitaria lays eggs on branches with a diameter of 3.6-13.0 mm and the productivity of female...

Author(s) : Mirchev, P.; Georgiev, G.; Georgieva, M.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2017 Vol.18 No.1 pp.41-52 ref.28

4. New records of long-legged flies (Diptera: Dolichopodidae) from Greece.

Three species Chrysotus cilipes Meigen, Hercostomus plagiatus (Loew) and Medetera jacula (Fallen) are recorded for first time to the fauna of Greece and four other dolichopodids - Chrysotus suavis Loew known from North Aegean Islands, Sciapus flavicinctus (Loew), Sympycnus simplicipes Becker and ...

Author(s) : Kechev, M.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2017 Vol.18 No.1 pp.53-57 ref.15

5. First report of Delphi nella abietis (O. Rostrup) E. Müller on Abies alba Mill. in Bulgaria.

Fungus Delphinella abietis (O. Rostr.) E. Mull., causing wilting and drying of Silver fir needles was recorded for first time in Bulgaria. Symptoms of Delphinella shoot blight were detected on young fir trees under the canopy and along the edge of spruce forests in locality Mostovete in the area of ...

Author(s) : Bencheva, S.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2017 Vol.18 No.1 pp.59-62 ref.16

6. Time consumption and production cost of log loading in the Hyrcanian forest using front-end loader.

This paper presents the research results of the performance of the loader Volvo 4500 BM (front-end loader) in timber loading in Northern Iran. To evaluate the current loading operations in Hyrcanian forest and possibility of finding out the better techniques and group organization, the empirical...

Author(s) : Mirkala, S. R. M.; Naghdi, R.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2017 Vol.18 No.1 pp.63-74 ref.19

7. A Laurus nobilis L. thicket in Apulia (South Italy).

A patch of Laurus nobilis L. thicket has been observed along the Baronale ephemeral stream in the Low Murgia of Bari. This is the first observation in Apulia Region for this habitat, and in general the aspects of Laurel high maquis are really rare in the whole Italian territory. The stand is...

Author(s) : Carella, R.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2017 Vol.18 No.1 pp.75-80 ref.24

8. Water runoff and eroded soil from intensive precipitations on different land use types in South-Western Bulgaria.

The paper presents results of investigation on water runoff and soil erosion at different land use types in Maleshevska Mountain, South-Western Bulgaria. The study is based on long-term (1995-2007) stationary data collection which included measurements of the water runoff and the eroded soil from...

Author(s) : Marinov, I. Ts.; Stankova, T.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2016 Vol.17 No.1 pp.5-19 ref.many

9. Biometric models for the aboveground biomass of juvenile black locust trees.

The main objective of this study was to derive biometric models for prediction of stem, branch, leaf and total aboveground biomass of juvenile Robinia pseudoacacia L. trees from easily measurable tree and stand characteristics. A two-stage fitting procedure and a set of predefined goodness-of-fit...

Author(s) : Stankova, T.; Gyuleva, V.; Kalmukov, K.; Dimitrova, P.; Velizarova, E.; Dimitrov, D. N.; Hristova, H.; Andonova, E.; Kalaydzhiev, I.; Velinova, K.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2016 Vol.17 No.1 pp.21-30 ref.many

10. Spatial relationships of Apodemus sylvaticus and Apodemus flavicollis in a syntopic habitat in Southwest Bulgaria during breeding season.

In Bulgaria Apodemus sylvaticus and Apodemus flavicollis are sympatric and in many regions syntopic, but how individuals occupy the habitat when they co-occur, and how they interact is not enough studied. The purpose of this work was to study the spatial distribution of both species during breeding ...

Author(s) : Simeonovska-Nikolova, D.; Savov, A.; Lukanov, S.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2016 Vol.17 No.1 pp.41-50 ref.38

11. Impact of low temperatures on pine processionary moth (Thaumetopoea pityocampa) larval survival in Bulgaria.

Thaumetopoea pityocampa winter nests were collected in January 2011 and 2015 from six localities situated in different regions over pest's range in Bulgaria. In each site, ten winter nests were randomly selected and the larval instar structure and their survival were determined. The 'silk index' of ...

Author(s) : Mirchev, P.; Georgiev, G.; Georgieva, M.; Bocheva, L.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2016 Vol.17 No.1 pp.51-58 ref.14

12. Current state of wood market in Bulgaria.

The goal of this article is to analyze in chronological order the amendments in legislation, governing wood market in Bulgaria during the period 2007-2015. This purpose is motivated by the need to outline some mistakes as well as some positive changes in regulations, which permit better allocation...

Author(s) : Kolev, K.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2016 Vol.17 No.1 pp.59-69 ref.12

13. Soil nematodes of family Plectidae (Nematoda, Plectida) in different plant communities in Strandzha Mountain (Bulgaria, Turkey).

During 2009-2010, 30 different localities in the region of Strandzha Mountain were sampled for terrestrial nematodes. Sampling plots were located in plant communities typical for the region in the Bulgarian and Turkish part of the mountain. In total, 15 species of order Plectida were identified and ...

Author(s) : Iliev, I.; Ilieva, Z.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2016 Vol.17 No.1 pp.71-108 ref.many

14. Health status and aesthetic evaluation of horse chestnut (Aesculus hippocastanum L.) roadside trees in Sofia.

The aim of this study was to assess the health status and the ornamental effect of horse chestnut trees used in landscaping of central Sofia streets. Phytosanitary status assessment of trees was based on three groups of diagnostic criteria: leaf physiological and biotic problems; stem and roots...

Author(s) : Pencheva, A.; Anisimova, S.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2016 Vol.17 No.2 pp.5-16 ref.31

15. Rare species and habitats in suburban areas. A temporary pond with Plantago altissima L. in the peri-urban area of Bari (South Italy).

Temporary ponds are rare and endangered habitats and sometimes can show the presence of uncommon species. In the periurban area of Bari, on Southern Italian Peninsula, a Plantago altissima L. coenoses has been recorded on the banks of a temporary pond occurring in an ephemeral erosion stream. The...

Author(s) : Carella, R.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2016 Vol.17 No.2 pp.17-22 ref.30

16. Productivity and costs of extraction of small sized timber by mules - a case study: plantations in N.W. Iran, Tyromrood Basin, Tonekabon City.

To assess productivity and costs of extraction, a time study was made. A model of performance was developed with extraction distance and log sizes as influencing factors. Average experimental data were: log diameter 12 cm, extraction distance 42 m, delay-free productivity 1.88 m3 per hour,...

Author(s) : Qazi, P. H.; Mirkala, S. R. M.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2016 Vol.17 No.2 pp.23-35 ref.25

17. Review of Ceroplastes Gray 1828 in Bulgaria with first report of C. cirripediformis Comstock 1881.

The aim of the publication was to summarize the current status of genus Ceroplastes in Bulgaria. During the last investigation in a garden center in Ravda four Ceroplastes species were identified. They were found infesting 20 ornamental plant species; most of them cultivated in greenhouses. Among...

Author(s) : Pencheva, A.; Yovkova, M.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2016 Vol.17 No.2 pp.37-44 ref.23

18. Forestry and riparian long-legged flies (Diptera: Dolichopodidae) from Sarnena Sredna Gora Mountain with new records for Bulgaria.

Thirty four dolichopodid flies were collected from six localities in Sarnena Sredna Gora Mountain, Bulgaria. Two species (Peloropeodes acuticornis (Oldenberg) and Neurigona erichsoni (Zetterstedt)) are new to the fauna of Bulgaria. Peloropeodes acuticornis is new to the Balkan Peninsula. Two other...

Author(s) : Kechev, M.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2016 Vol.17 No.2 pp.45-55 ref.18

19. First record of the pathogen Botryosphaeria dothidea associated with Sequoiadendron giganteum in Bulgaria.

Extensive dieback of giant sequoia (Sequoidendron giganteum) was established in Bulgaria in recent years. On the symptomatic trees, the fungus Botryosphaeria dothidea was identified as the causative agent of the dieback that is the first report from Bulgaria. Stem cankers, irregularly distributed...

Author(s) : Georgieva, M.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2016 Vol.17 No.2 pp.57-62 ref.23

20. New data on species of order Mononchida (Nematoda) from Rila and the Rhodopes Mountains, Bulgaria.

Nematode fauna of three natural reserves in Bulgaria (in Rila and the Rhodopess) has been studied. Eleven different habitats from forest belt zone including oak, beech and spruce forests, and subalpine zone with specific plant associations, were sampled for at least 3 years. Eight species of three...

Author(s) : Iliev, I.; Ilieva, Z.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2016 Vol.17 No.2 pp.63-84 ref.36

21. Assessment of drought related climate change impacts on forests in Bulgaria.

The paper presents projections for change of air temperature and precipitation during the period 1951-2000, for 2050 and 2070 based on analysis of climate elements in the forests of Bulgaria in XX century, and application of global circulation models, WorldClim data and scenarios of IPCC Fifth...

Author(s) : Raev, I.; Alexandrov, V.; Tinchev, G.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2015 Vol.16 No.1 pp.5-24 ref.50

22. Conservation of forest diversity. The case of Hungarian oak (Quercus frainetto Ten.) in Bari Basin (south Italy).

The first observation of Hungarian oak (Quercus frainetto) in Bari Basin gives a chance to understand more on the ecology, the current species distribution and on the impacts of landscape modifications on forest biodiversity in the considered territory. Bari Basin is a territory widely dominated by ...

Author(s) : Carella, R.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2015 Vol.16 No.1 pp.25-33 ref.22

23. Fine-root production and turnover based on 2-yr of sequential coring in four forest tree species in Bulgaria.

The present study focuses on determining the carbon stock and the seasonal variations in fine roots of four main tree species in Bulgaria - European beech (Fagus sylvatica L.), Norway spruce (Picea abies L. Karst.), Scots pine (Pinus sylvestris L.) and Oak (Quercus frainetto Ten.) along the soil...

Author(s) : Zhiyanski, M.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2015 Vol.16 No.1 pp.34-49 ref.many

24. Growth and adaptive capacity of one year old Populus nigra L.

The objective of this study was to evaluate the impact of cultivation medium on the growth rate and gas exchange of mature cuttings from one Populus nigra L. clone during the first growing season (June-September). In the first half of the season it produced different stem phenotypes on different...

Author(s) : Kalaydzhiev, I.; Anev, S.; Gyuleva, V.; Tsvetkova, N.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2015 Vol.16 No.1 pp.50-61 ref.17

25. Using a nonparametric method to describe diameter distributions of birch (Betula pubescens Ehrh.) stands in Northwest Spain.

In this study, the nonparametric k-nearest neighbour method was used to describe diameter distributions of birch stands in Northwest Spain. It was applied using the following essential steps: (i) estimation of the distance between target stand and reference stands (kth-nearest neighbours); (ii) use ...

Author(s) : Gorgoso-Varela, J. J.; Rojo-Alboreca, A.; Álvarez-González, J. G.

Publisher : Bulgarian Academy of Sciences, Forest Research Institute, Sofia, Bulgaria

Journal article : Silva Balcanica 2015 Vol.16 No.1 pp.62-75 ref.40