The planning of a forest road network is preceded by a detailed analysis of the current qualitative and quantitative state of forest roads, and above all, the determination of their spatial layout. This paper presents a categorization and assessment of the state of the existing roads in the FMUs "Željin" and "Bukovik II" and defining of the parts of management units with insufficiently developed networks of forest roads. The identification of unopened and insufficiently opened parts of management units was performed on the basis of density of a forest road network by departments and using a fishnet with 500 x 500 m cell dimensions and buffer zones of different widths around forest roads. The absolute density of a forest road network in the FMU "Željin" is 18.62 m/ha and in the FMU "Bukovik II" 12.03 m/ha. After placing buffer zones around forest roads, it was found that in the FMU "Željin" over 56% of the area is covered by the zone ranging from 0 to 200 m, while in the FMU "Bukovik II" this zone covers 48% of the area. [Projekat Ministarstva nauke Republike Srbije, br. TR-31041]
在进行森林路网规划之前，首先要对森林道路的现状进行详细的定性和定量分析，首先要确定森林道路的空间布局。本文对FMUs“Željin”和“Bukovik II”中现有道路的状况进行了分类和评估，并对森林道路网络不发达的管理单位部分进行了定义。在各部门森林路网密度的基础上，使用500 x 500米网格尺寸的渔网和森林道路周围不同宽度的缓冲区，确定了管理单位未开放和未充分开放的部分。“Željin”森林路网的绝对密度为18.62米/公顷，“Bukovik II”森林路网的绝对密度为12.03米/公顷。在森林道路周围设置缓冲区后，发现在FMU“Željin”中，超过56%的面积被0 - 200米的区域覆盖，而在FMU“Bukovik II”中，该区域覆盖了48%的面积。[南斯拉夫]塞族共和国部长项目;tr - 31041]
{"title":"Assessment of the state of a forest road network as a basis for making a program of forest management unit opening.","authors":"M. Danilović, D. Stojnić","doi":"10.2298/GSF1410059D","DOIUrl":"https://doi.org/10.2298/GSF1410059D","url":null,"abstract":"The planning of a forest road network is preceded by a detailed analysis of the current qualitative and quantitative state of forest roads, and above all, the determination of their spatial layout. This paper presents a categorization and assessment of the state of the existing roads in the FMUs \"Željin\" and \"Bukovik II\" and defining of the parts of management units with insufficiently developed networks of forest roads. The identification of unopened and insufficiently opened parts of management units was performed on the basis of density of a forest road network by departments and using a fishnet with 500 x 500 m cell dimensions and buffer zones of different widths around forest roads. The absolute density of a forest road network in the FMU \"Željin\" is 18.62 m/ha and in the FMU \"Bukovik II\" 12.03 m/ha. After placing buffer zones around forest roads, it was found that in the FMU \"Željin\" over 56% of the area is covered by the zone ranging from 0 to 200 m, while in the FMU \"Bukovik II\" this zone covers 48% of the area. [Projekat Ministarstva nauke Republike Srbije, br. TR-31041]","PeriodicalId":30149,"journal":{"name":"Glasnik Sumarskog Fakulteta Univerzitet u Beogradu","volume":"1 1","pages":"59-71"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68306085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Samuilov, Danijela Djunisijevic-Bojovic, M. Djukic, J. Rakovic
Some heavy metals such as Zn are essential micronutrients for plants. However, in a high concentration in soils they could cause repression of growth with toxicity symptoms. It is therefore very important to investigate the species that are tolerant to high concentration of zinc which have the ability to survive on soils contaminated with heavy metals. This paper presents an investigation of the effect of elevated Zn concentrations on the germination and seedling growth of the invasive tree species Ailanthus altissima (Swingle) Mill., aimed at a better understanding of its adaptation ability to heavy metal stress and potential use in phytoremediation. Seeds of Ailanthus altissima were treated with Zn concentrations of 25, 100 and 250 μM in form of zinc sulfate. After germination, the seedlings at the stage of first leaf development were transferred into a growing chamber in the hydroponic system where zinc sulfate was added in the concentrations of 100, 250 and 500 μM. The results showed that Zn treatments, including the highest concentration, have caused a reduction in seed germination parameters. Considering the hypocotyl and radicle length, there was no significant statistical difference among the treatments, but further growth of young seedlings in hydroponics under high concentrations of Zn, cause an inhibition of the root system growth and repress development of assimilating organs. Seeds and seedlings of A. altissima are tolerant to elevated Zn concentrations at early stages of development. However, later on with leaves development, the inhibitory effect of the strongest concentrations is expressed. [Projekat Ministarstva nauke Republike Srbije, br. 43007: Studying climate change and its influence on the environment: impacts, adaptation and mitigation]
{"title":"The effect of elevated Zn concentrations on seed germination and young seedling growth of Ailanthus altissima (Mill.) swingle","authors":"S. Samuilov, Danijela Djunisijevic-Bojovic, M. Djukic, J. Rakovic","doi":"10.2298/GSF1410145S","DOIUrl":"https://doi.org/10.2298/GSF1410145S","url":null,"abstract":"Some heavy metals such as Zn are essential micronutrients for plants. However, in a high concentration in soils they could cause repression of growth with toxicity symptoms. It is therefore very important to investigate the species that are tolerant to high concentration of zinc which have the ability to survive on soils contaminated with heavy metals. This paper presents an investigation of the effect of elevated Zn concentrations on the germination and seedling growth of the invasive tree species Ailanthus altissima (Swingle) Mill., aimed at a better understanding of its adaptation ability to heavy metal stress and potential use in phytoremediation. Seeds of Ailanthus altissima were treated with Zn concentrations of 25, 100 and 250 μM in form of zinc sulfate. After germination, the seedlings at the stage of first leaf development were transferred into a growing chamber in the hydroponic system where zinc sulfate was added in the concentrations of 100, 250 and 500 μM. The results showed that Zn treatments, including the highest concentration, have caused a reduction in seed germination parameters. Considering the hypocotyl and radicle length, there was no significant statistical difference among the treatments, but further growth of young seedlings in hydroponics under high concentrations of Zn, cause an inhibition of the root system growth and repress development of assimilating organs. Seeds and seedlings of A. altissima are tolerant to elevated Zn concentrations at early stages of development. However, later on with leaves development, the inhibitory effect of the strongest concentrations is expressed. [Projekat Ministarstva nauke Republike Srbije, br. 43007: Studying climate change and its influence on the environment: impacts, adaptation and mitigation]","PeriodicalId":30149,"journal":{"name":"Glasnik Sumarskog Fakulteta Univerzitet u Beogradu","volume":"2014 1","pages":"145-157"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2298/GSF1410145S","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68306122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents the issue of the use of forest and hunting resources in Serbia, with special emphasis on their sustainability. The use of modern technological solutions in terms of sustainable use of forest and hunting resources should be seen through an analysis and evaluation of environmental impacts. The existing machinery used in Serbian forestry cannot respond to the current demands of forestry production. However, the current unfavourable conditions can be significantly improved with appropriate measures. The planning of a network of roads including a number of factors that directly and indirectly affect sustainable use is of great importance for the development of forestry and hunting. Wood biomass in Serbian forests should be used in the manner and to the extent that ensures the sustainability of ecosystems and the production of large quantities of energy. In recent years, non-timber forest products have gained importance, so that the income generated from their use is growing. The impact of newly adopted laws and bylaws in the field of forestry, hunting and the protection of nature and environment will depend primarily on their application, control, execution and possible amendments and adjustments.
{"title":"Sustainable use of forest and hunting resources.","authors":"M. Danilović, D. Gačić","doi":"10.2298/GSF14S1025D","DOIUrl":"https://doi.org/10.2298/GSF14S1025D","url":null,"abstract":"This paper presents the issue of the use of forest and hunting resources in Serbia, with special emphasis on their sustainability. The use of modern technological solutions in terms of sustainable use of forest and hunting resources should be seen through an analysis and evaluation of environmental impacts. The existing machinery used in Serbian forestry cannot respond to the current demands of forestry production. However, the current unfavourable conditions can be significantly improved with appropriate measures. The planning of a network of roads including a number of factors that directly and indirectly affect sustainable use is of great importance for the development of forestry and hunting. Wood biomass in Serbian forests should be used in the manner and to the extent that ensures the sustainability of ecosystems and the production of large quantities of energy. In recent years, non-timber forest products have gained importance, so that the income generated from their use is growing. The impact of newly adopted laws and bylaws in the field of forestry, hunting and the protection of nature and environment will depend primarily on their application, control, execution and possible amendments and adjustments.","PeriodicalId":30149,"journal":{"name":"Glasnik Sumarskog Fakulteta Univerzitet u Beogradu","volume":"1 1","pages":"25-49"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68306513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The leafing phenophase of pedunculate oak (Quercus robur L.) was analyzed at two locations in Belgrade (Ada Ciganlija - “AC”, Bojcinska suma - “BS”). The observations were made on 29 trees per site for three consecutive years (2004, 2005, 2006). In the “BS” site the phenophase of leafing starts and ends earlier than in the “AC” site. The largest number of trees in the “AC” site are classified in the late phenological group and in the “BS” site they belong to the “average” group. Population variability of the analyzed parameters of the phenophase of leafing was confirmed by the results of a Mann - Witney U - test for each year of observation, except for the end of the second year of observation and start of leafing in the first year of observation. According to the results of an F - test significant differences between sites were confirmed for all analyzed parameters except for the duration of leafing (2005) and the start of leafing (2006). Differences among the years of observation in the “AC” site were significant only in the end and in the “BS” site for they were significant for all three growth stages of scrolling. Despite the different environmental conditions in the three years of monitoring the stability of the phenology of analyzed populations was maintained (the percentage of trees that were always over the years of observation in the same phenological group relative to the start of leafing „AC” - 41.3%, „BS” - 55.2%), which is primarily the result of the genetic structure of populations and intraspecies variability. [Projekat Ministarstva nauke Republike Srbije, br. 43007 III: Istraživanje klimatskih promena i njihovog uticaja na životnu sredinu - pracenje uticaja, adaptacija i ublažavanje]
对贝尔格莱德两个地点(Ada Ciganlija -“AC”和Bojcinska suma -“BS”)的有花序栎(Quercus robur L.)叶片物候期进行分析。连续三年(2004年、2005年、2006年)对每个地点的29棵树进行观测。在“BS”位点，叶片物候期的开始和结束都比“AC”位点早。“AC”样地最多的树木属于晚物候类群，“BS”样地最多的树木属于“平均”类群。除第2年观察结束和第1年观察开始外，各观测年的物候期分析参数的群体变异性通过Mann - Witney U检验结果得到证实。根据F检验的结果，除了叶片的持续时间(2005年)和叶片的开始时间(2006年)外，所有分析参数在不同地点之间都有显著差异。在“AC”位点，不同年份之间的差异仅在最后显著，而在“BS”位点，它们在滚动的三个生长阶段都显著。尽管在3年的监测中环境条件不同，但所分析群体的物候特征保持了稳定性(在同一物候组中，相对于开始叶片的年数，AC为41.3%，BS为55.2%)，这主要是群体遗传结构和种内变异性的结果。[南斯拉夫]塞族共和国部长项目;[437] 3: Istraživanje klimatskih promena i njihovog uticaja životnu srdinu - pracenje uticaja, adaptacija i ublažavanje]
{"title":"Population and individual variability of the leafing phenophase of pedunculate oak in three successive years.","authors":"B. Batos, J. Ninic-Todorovic, D. Miljković","doi":"10.2298/gsf1409009b","DOIUrl":"https://doi.org/10.2298/gsf1409009b","url":null,"abstract":"The leafing phenophase of pedunculate oak (Quercus robur L.) was analyzed at two locations in Belgrade (Ada Ciganlija - “AC”, Bojcinska suma - “BS”). The observations were made on 29 trees per site for three consecutive years (2004, 2005, 2006). In the “BS” site the phenophase of leafing starts and ends earlier than in the “AC” site. The largest number of trees in the “AC” site are classified in the late phenological group and in the “BS” site they belong to the “average” group. Population variability of the analyzed parameters of the phenophase of leafing was confirmed by the results of a Mann - Witney U - test for each year of observation, except for the end of the second year of observation and start of leafing in the first year of observation. According to the results of an F - test significant differences between sites were confirmed for all analyzed parameters except for the duration of leafing (2005) and the start of leafing (2006). Differences among the years of observation in the “AC” site were significant only in the end and in the “BS” site for they were significant for all three growth stages of scrolling. Despite the different environmental conditions in the three years of monitoring the stability of the phenology of analyzed populations was maintained (the percentage of trees that were always over the years of observation in the same phenological group relative to the start of leafing „AC” - 41.3%, „BS” - 55.2%), which is primarily the result of the genetic structure of populations and intraspecies variability. [Projekat Ministarstva nauke Republike Srbije, br. 43007 III: Istraživanje klimatskih promena i njihovog uticaja na životnu sredinu - pracenje uticaja, adaptacija i ublažavanje]","PeriodicalId":30149,"journal":{"name":"Glasnik Sumarskog Fakulteta Univerzitet u Beogradu","volume":"1 1","pages":"9-32"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68305467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A morphological study of intra and interpopulation variability of black poplar leaves was conducted in two populations in the area of Vojvodina. Nine morphometric parameters of leaves have been analyzed. The results indicate that there is considerable variability within and between the populations. Morphological differentiation is clearly represented with the average values of analyzed parameters and a statistically significant difference between the mean values. On the basis of the obtained data, it has been concluded that the variability within the two populations is much more expressed than the variability between them. The uniformity of environmental conditions of the studied locations indicates that this variability is a consequence of the specific gene pool of the studied populations.
{"title":"Variability of morphometric leaf characteristics of black poplar from the area of Vojvodina.","authors":"Dijana Čortan, M. Šijačić‐Nikolić, R. Knežević","doi":"10.2298/GSF1409063C","DOIUrl":"https://doi.org/10.2298/GSF1409063C","url":null,"abstract":"A morphological study of intra and interpopulation variability of black poplar leaves was conducted in two populations in the area of Vojvodina. Nine morphometric parameters of leaves have been analyzed. The results indicate that there is considerable variability within and between the populations. Morphological differentiation is clearly represented with the average values of analyzed parameters and a statistically significant difference between the mean values. On the basis of the obtained data, it has been concluded that the variability within the two populations is much more expressed than the variability between them. The uniformity of environmental conditions of the studied locations indicates that this variability is a consequence of the specific gene pool of the studied populations.","PeriodicalId":30149,"journal":{"name":"Glasnik Sumarskog Fakulteta Univerzitet u Beogradu","volume":"1 1","pages":"63-72"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68305564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dragan Nonic, M. Avdibegović, J. Nedeljković, A. Radosavljević, N. Ranković
At the global level, due to the negative effects of over-exploitation of natural resources, numerous processes and initiatives for their conservation and sustainable governance have started. The beginning of the transition process, as well as political and economic changes that followed in the countries in transition, were in line with the new orientation of the international forest and nature protection policy. The transition process has caused, among other things, a redefinition of the role of government in managing natural resources. This meant a shift from “government” to “governance” concept. This concept refers to the change from the classical approach of “command and control” to active participation of all involved parties and establishing rules for the division of responsibilities and benefits. The aim of the paper is to identify, analyze and systematise the current concepts of sustainable governance in forestry and nature protection, their characteristics and the principles on which they are based, with a main purpose of preparation of a research platform for more detailed research in this area. The paper gives recommendations for the application of the principles of governance in forestry and nature protection, as well as recommendations for future research in this area.
{"title":"Sustainable governance in forestry and nature protection.","authors":"Dragan Nonic, M. Avdibegović, J. Nedeljković, A. Radosavljević, N. Ranković","doi":"10.2298/GSF14S1113N","DOIUrl":"https://doi.org/10.2298/GSF14S1113N","url":null,"abstract":"At the global level, due to the negative effects of over-exploitation of natural resources, numerous processes and initiatives for their conservation and sustainable governance have started. The beginning of the transition process, as well as political and economic changes that followed in the countries in transition, were in line with the new orientation of the international forest and nature protection policy. The transition process has caused, among other things, a redefinition of the role of government in managing natural resources. This meant a shift from “government” to “governance” concept. This concept refers to the change from the classical approach of “command and control” to active participation of all involved parties and establishing rules for the division of responsibilities and benefits. The aim of the paper is to identify, analyze and systematise the current concepts of sustainable governance in forestry and nature protection, their characteristics and the principles on which they are based, with a main purpose of preparation of a research platform for more detailed research in this area. The paper gives recommendations for the application of the principles of governance in forestry and nature protection, as well as recommendations for future research in this area.","PeriodicalId":30149,"journal":{"name":"Glasnik Sumarskog Fakulteta Univerzitet u Beogradu","volume":"1 1","pages":"113-140"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68306358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The forest cover of Serbia occupies around 29% of its territory, which puts it among fairly well wooded countries in Europe. The forests of Serbia are characterized by both state and private forests, medium preservation status, i.e. 27% of area that is covered by insufficiently stocked stands. Coppice forests cover about 50% of the area, and private forests are additionally burdened by fragmented plots. Forest management planning in Serbia is older than 200 years (The Plan of Deliblato Sands Afforestation 1806). There are two basic assumptions that define forest management planning: sustainability and multifunctionality. Today, forest management planning in Serbia is regulated by the Law on forests and it has the characteristics of a system. The planning also has the characteristics of an integral, integrated and adaptive system. The latter is particularly important in terms of pronounced climatic changes. For the forests in protected objects of nature, there are also other types of plans that complement sector plans in forestry (e.g. management plans in protected areas).
{"title":"Sustainable forest management planning in Serbia","authors":"M. Medarević, B. Šljukić, Snežana Obradović","doi":"10.2298/GSF14S1009M","DOIUrl":"https://doi.org/10.2298/GSF14S1009M","url":null,"abstract":"The forest cover of Serbia occupies around 29% of its territory, which puts it among fairly well wooded countries in Europe. The forests of Serbia are characterized by both state and private forests, medium preservation status, i.e. 27% of area that is covered by insufficiently stocked stands. Coppice forests cover about 50% of the area, and private forests are additionally burdened by fragmented plots. Forest management planning in Serbia is older than 200 years (The Plan of Deliblato Sands Afforestation 1806). There are two basic assumptions that define forest management planning: sustainability and multifunctionality. Today, forest management planning in Serbia is regulated by the Law on forests and it has the characteristics of a system. The planning also has the characteristics of an integral, integrated and adaptive system. The latter is particularly important in terms of pronounced climatic changes. For the forests in protected objects of nature, there are also other types of plans that complement sector plans in forestry (e.g. management plans in protected areas).","PeriodicalId":30149,"journal":{"name":"Glasnik Sumarskog Fakulteta Univerzitet u Beogradu","volume":"1 1","pages":"9-23"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68306395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The paper shows results of researching the market of glued laminated timber as the most frequent innovative timber product in constructing timber framed residential facilities in Europe and Serbia. The research included the development of production, consumption and trade flows for the most significant countries in the European Union and Serbia. Additionally, the paper gives characteristics of this innovative timber product regarding dimensions, allowed deviations of dimensions defined in adequate European standard, wood species it is made of and fire resistance. The last part of the paper shows results of econometric modeling of the impact of building timber-framed houses on the consumption of glued laminated timber in Austria as one of the countries belonging to the group of the largest consumers of this innovative timber product in Europe. Taking into consideration that the substitution of classic building materials, primarily concrete, steel and aluminum, with glued laminated timber in residential construction contributes to the reduction of carbon-dioxide emission and climate change mitigation, research results of the effects of such substitution are presented in the last chapter in this paper. [Projekat Ministarstva nauke Republike Srbije, br. III43007: Istraživanje klimatskih promena na životnu sredinu: pracenje uticaja, adaptacija i ublažavanje]
本文介绍了在欧洲和塞尔维亚，作为木结构住宅建筑中最常见的创新木材产品的胶合层木材的市场研究结果。这项研究包括发展欧洲联盟和塞尔维亚最重要国家的生产、消费和贸易流量。此外，本文给出了这种创新木材产品的特点，包括尺寸、欧洲标准中规定的尺寸允许偏差、木材种类和防火性。论文的最后一部分显示了建造木结构房屋对奥地利胶合层压木材消费影响的计量经济学模型的结果，奥地利是属于欧洲这种创新木材产品最大消费者群体的国家之一。考虑到胶合层合木材在住宅建筑中替代经典建筑材料，主要是混凝土、钢和铝，有助于减少二氧化碳排放和减缓气候变化，本文的最后一章给出了这种替代效果的研究结果。[南斯拉夫]塞族共和国部长项目;[03:47 . 07] Istraživanje klimatskih promena na životnu sredinu: pracenje uticja, adaptacija i ublažavanje]
{"title":"Market of innovative timber products in Europe and Serbia and their contribution to climate change mitigation.","authors":"P. Sretenovic, B. Glavonjić","doi":"10.2298/gsf1410159s","DOIUrl":"https://doi.org/10.2298/gsf1410159s","url":null,"abstract":"The paper shows results of researching the market of glued laminated timber as the most frequent innovative timber product in constructing timber framed residential facilities in Europe and Serbia. The research included the development of production, consumption and trade flows for the most significant countries in the European Union and Serbia. Additionally, the paper gives characteristics of this innovative timber product regarding dimensions, allowed deviations of dimensions defined in adequate European standard, wood species it is made of and fire resistance. The last part of the paper shows results of econometric modeling of the impact of building timber-framed houses on the consumption of glued laminated timber in Austria as one of the countries belonging to the group of the largest consumers of this innovative timber product in Europe. Taking into consideration that the substitution of classic building materials, primarily concrete, steel and aluminum, with glued laminated timber in residential construction contributes to the reduction of carbon-dioxide emission and climate change mitigation, research results of the effects of such substitution are presented in the last chapter in this paper. [Projekat Ministarstva nauke Republike Srbije, br. III43007: Istraživanje klimatskih promena na životnu sredinu: pracenje uticaja, adaptacija i ublažavanje]","PeriodicalId":30149,"journal":{"name":"Glasnik Sumarskog Fakulteta Univerzitet u Beogradu","volume":"1 1","pages":"159-173"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68306231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Filip Jovanovic, D. Obratov-Petković, M. Mačukanović-Jocić
As a contribution to the study of the melliferous flora of Serbia, nectar production in two species of the genus Galanthus L. (G. nivalis L., and G. elwesii Hook.) was investigated. The intensity of nectar secretion was determined directly, using the microcapillary method. The study included determination of the total daily nectar amount per flower, and an analysis of nectar secretion dynamics during the day and during the flower ontogeny. The results show that the total daily amount of nectar per flower is low, and flowers of both species exude nectar only once during the day and during the flower ontogeny. However, despite the low nectar production, Galanthus species represent a first valuable source of nectar and pollen to pollinators in the early spring period, when only a small number of species are in the flowering phenophase.
为了对塞尔维亚花蜜植物区系的研究作出贡献，对Galanthus L. (G. nivalis L.)和G. elwesii Hook.)两种Galanthus L.的花蜜生产情况进行了研究。采用微毛细管法直接测定花蜜分泌强度。研究包括测定每朵花每天的总花蜜量，分析白天和花发生期间的花蜜分泌动态。结果表明，每朵花每天的花蜜总量很低，两种花在白天和花发育期间只分泌一次花蜜。然而，尽管花蜜产量低，但在早春时期，只有少数物种处于开花物候期，Galanthus物种代表了传粉者的第一个有价值的花蜜和花粉来源。
{"title":"Nectar production in species of the Genus galanthus L. (Amaryllidaceae) from Serbia","authors":"Filip Jovanovic, D. Obratov-Petković, M. Mačukanović-Jocić","doi":"10.2298/GSF1409085J","DOIUrl":"https://doi.org/10.2298/GSF1409085J","url":null,"abstract":"As a contribution to the study of the melliferous flora of Serbia, nectar production in two species of the genus Galanthus L. (G. nivalis L., and G. elwesii Hook.) was investigated. The intensity of nectar secretion was determined directly, using the microcapillary method. The study included determination of the total daily nectar amount per flower, and an analysis of nectar secretion dynamics during the day and during the flower ontogeny. The results show that the total daily amount of nectar per flower is low, and flowers of both species exude nectar only once during the day and during the flower ontogeny. However, despite the low nectar production, Galanthus species represent a first valuable source of nectar and pollen to pollinators in the early spring period, when only a small number of species are in the flowering phenophase.","PeriodicalId":30149,"journal":{"name":"Glasnik Sumarskog Fakulteta Univerzitet u Beogradu","volume":"2014 1","pages":"85-96"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68305199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Kadović, P. Spasov, Yousef Mansour Ali Bohajar, Snežana Belanović-Simić, O. Kosanin
Deliblato Sands are located in the southern part of Banat region in Vojvo- dina province. According to the estimated changes of basic climate parameters in this part of the Republic of Serbia during past decades very strong rise in annual air temperatures (T) was registered, an average of 0.52°C per decade. This rise in tem- perature increased the potential evapotranspiration (PET), which together with pre- cipitation can increase the degree of aridity of climate in the study area. However, in the same period an increase in annual precipitation sum (P) was observed, an aver- age of about 35 mm per decade, which may somewhat slow the aridisation of desert sands. Considering the nature, origin and significance of Deliblato Sands ecosys - tem, the main goal of this paper is to analyse the drought and aridity index (AI = P / PET), analyse the trend of aridisation process and its possible impact on ecosystems of this special nature reserve. Aridity index analyses were performed in meteoro- logical stations Banatski Karlovac, Vrsac and Bela Crkva for the period 1981 - 2010 at the annual values and for the growing season. Results showed that Deliblato des- ert sands (Banatski Karlovac) stand at a higher frequency of arid years (AI < 0.65) compared to locations of Vrsac and Bela Crkva. On the other hand, the level of arid- ity has considerably increased during the vegetation period in desert sands as well in its surroundings. This intensified aridity is the result of considerable increase of potential evapotranspiration (PET) connected to season precipitation.
{"title":"Analysis of aridity indicators in the Deliblato Sands.","authors":"R. Kadović, P. Spasov, Yousef Mansour Ali Bohajar, Snežana Belanović-Simić, O. Kosanin","doi":"10.2298/GSF1409097K","DOIUrl":"https://doi.org/10.2298/GSF1409097K","url":null,"abstract":"Deliblato Sands are located in the southern part of Banat region in Vojvo- dina province. According to the estimated changes of basic climate parameters in this part of the Republic of Serbia during past decades very strong rise in annual air temperatures (T) was registered, an average of 0.52°C per decade. This rise in tem- perature increased the potential evapotranspiration (PET), which together with pre- cipitation can increase the degree of aridity of climate in the study area. However, in the same period an increase in annual precipitation sum (P) was observed, an aver- age of about 35 mm per decade, which may somewhat slow the aridisation of desert sands. Considering the nature, origin and significance of Deliblato Sands ecosys - tem, the main goal of this paper is to analyse the drought and aridity index (AI = P / PET), analyse the trend of aridisation process and its possible impact on ecosystems of this special nature reserve. Aridity index analyses were performed in meteoro- logical stations Banatski Karlovac, Vrsac and Bela Crkva for the period 1981 - 2010 at the annual values and for the growing season. Results showed that Deliblato des- ert sands (Banatski Karlovac) stand at a higher frequency of arid years (AI < 0.65) compared to locations of Vrsac and Bela Crkva. On the other hand, the level of arid- ity has considerably increased during the vegetation period in desert sands as well in its surroundings. This intensified aridity is the result of considerable increase of potential evapotranspiration (PET) connected to season precipitation.","PeriodicalId":30149,"journal":{"name":"Glasnik Sumarskog Fakulteta Univerzitet u Beogradu","volume":"32 1","pages":"97-112"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68305444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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