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Total height is one of the basic morphometric tree variables included in all forest management inventories, because it is connected with several forest processes and functions related to the estimation of the woody tree volume and sustainable forest yield. The current research, based on a total sample of 1059 measured Black pine (Pinus nigra Arn.) trees from Cyprus, is an attempt to explore the biological processes related to the tree height allometry of this species and develop a generalized mixed-effects model for tree height prediction. The proposed model, with three additional basic covariates and two random parameters, explained almost 96% of the height variance. The model results showed that although competition and site-connected variables affected the total height, it was the crown base height that explained, to a large degree, the height expression. Through the mixed-effects modeling approach it was possible to explore the complex biological processes related to the tree allometry of Black pine and depict those within a mathematical formulation. The proposed generalized model decreased the error significantly, and therefore it can be used for operational forest management purposes. However, for marginal predictions, use of only the fixed part of the basic model could suffice, since this also provided unbiased parameter estimates.
Dimitrios Raptis; Vassiliki Kazana; Nikolaos Onisiforou; Christos Stamatiou; Angelos Kazaklis. Height Allometry of Pinus nigra Arn. in Troodos National Forest Park, Cyprus. Sustainability 2021, 13, 5998 .
AMA StyleDimitrios Raptis, Vassiliki Kazana, Nikolaos Onisiforou, Christos Stamatiou, Angelos Kazaklis. Height Allometry of Pinus nigra Arn. in Troodos National Forest Park, Cyprus. Sustainability. 2021; 13 (11):5998.
Chicago/Turabian StyleDimitrios Raptis; Vassiliki Kazana; Nikolaos Onisiforou; Christos Stamatiou; Angelos Kazaklis. 2021. "Height Allometry of Pinus nigra Arn. in Troodos National Forest Park, Cyprus." Sustainability 13, no. 11: 5998.
Crown size estimations are of vital importance in forest management practice. This paper presents nonlinear models that were developed for crown width prediction of Black pine (Pinus nigra Arn.) natural, pure, even-aged stands in Olympus Mountain, central Greece. Using a number of measured characteristics at tree and plot level from 66 sample plots as independent variables, an attempt was made to predict crown width accurately, initially based on Least Square Analysis. At the second stage, nonlinear mixed effect modeling was performed in order to increase the fitting ability of the proposed models and to deal with the lack of between observations independence error assumption. Based on the same form, a generalized crown width model was developed by including six main regressors, such as the diameter at breast height, the total height, the canopy base height, the basal area, the relative spacing index and the diameter to quadratic mean diameter ratio, while at the final stage, the same model was expanded to mixed-effect. The proposed models were evaluated against independent crown width sample observations that were also obtained from the study area. The results showed that the two types of mixed-effect models performed equally well and, therefore, we propose those for use in forestry practice. Furthermore, the exact contribution of each inherent variable in crown width allometry was evaluated, thus providing a framework to facilitate field measurements for forest management predictions.
Dimitrios Raptis; Vassiliki Kazana; Angelos Kazaklis; Christos Stamatiou. A Crown Width-Diameter Model for Natural Even-Aged Black Pine Forest Management. Forests 2018, 9, 610 .
AMA StyleDimitrios Raptis, Vassiliki Kazana, Angelos Kazaklis, Christos Stamatiou. A Crown Width-Diameter Model for Natural Even-Aged Black Pine Forest Management. Forests. 2018; 9 (10):610.
Chicago/Turabian StyleDimitrios Raptis; Vassiliki Kazana; Angelos Kazaklis; Christos Stamatiou. 2018. "A Crown Width-Diameter Model for Natural Even-Aged Black Pine Forest Management." Forests 9, no. 10: 610.
In this study, we compare ALOS World 3D 30m mesh (AW3D30) which is provided free by Japan Aerospace Exploration Agency (JAXA), European Digital Elevation Model (EUDEM) which is provided free by European Environment Agency (EEA) and the DEM created from digitized contours from the 1/50.000 topographic maps of Hellenic Military Geographic Service (HMGS). The vegetation height of a forest environment affects the elevation data of AW3D30 and EU-DEM, with that in mind, we choose to compare the elevation data in forest fire break lines. The two DSMs, AW3D30 and EU-DEM v1.1 published in 2016 and the spatial resolution is 30m for AW3D30 and 25m for EU-DEM. For the DEM we created from the topographic maps we used 20m-pixel size. The statistical parameters of the three DEMs have examined in 149 forest fire break lines of total length 187,955.8 km. The study area is located in Chalkidiki a part of the Region of Central Macedonia in Northern Greece.
Vasileios C. Drosos; Sarantis-Aggelos G. Liampas; Christos Stamatiou. Comparison of three DEM sources: a case study from Greek forests. Sixth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2018) 2018, 10773, 107731H .
AMA StyleVasileios C. Drosos, Sarantis-Aggelos G. Liampas, Christos Stamatiou. Comparison of three DEM sources: a case study from Greek forests. Sixth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2018). 2018; 10773 ():107731H.
Chicago/Turabian StyleVasileios C. Drosos; Sarantis-Aggelos G. Liampas; Christos Stamatiou. 2018. "Comparison of three DEM sources: a case study from Greek forests." Sixth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2018) 10773, no. : 107731H.
Topographical information is fundamental to many geospatial related information and applications on Earth. Remote sensing satellites have the advantage in such fields because they are capable of global observation and repeatedly. One of the newest free of charge global digital surface model (DSM) is ALOS World 3D 30m mesh (AW3D30) and it is provided by Japan Aerospace Exploration Agency (JAXA). The AW3D30 version 1 released on May 2016 and on March 2017 the newer version 1.1 released with changes in specific areas. In Greece, the National Trigonometric Network established by the Hellenic Military Geographic Service (HMGS), the network includes 26,739 trigonometric control points but are not systematically maintained and many do not exist anymore. The trigonometric control points located in areas without vegetation, so the vegetation height does not influence the comparison. This paper calculates the vertical difference of the AW3D30 DSM and the trigonometric survey points of 1st, 2nd, 3rd, and 4th order. Also, a map identifying the areas with low and high height difference is presented.
Sarantis Aggelos G. Liampas; Vasileios C. Drosos; Christos Stamatiou. Vertical accuracy comparison of ALOS AW3D30 DSM and trigonometric survey points. Sixth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2018) 2018, 10773, 107731M .
AMA StyleSarantis Aggelos G. Liampas, Vasileios C. Drosos, Christos Stamatiou. Vertical accuracy comparison of ALOS AW3D30 DSM and trigonometric survey points. Sixth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2018). 2018; 10773 ():107731M.
Chicago/Turabian StyleSarantis Aggelos G. Liampas; Vasileios C. Drosos; Christos Stamatiou. 2018. "Vertical accuracy comparison of ALOS AW3D30 DSM and trigonometric survey points." Sixth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2018) 10773, no. : 107731M.
Sarantis-Angelos Liampas; Christos Stamatiou; Dimitris Farmakis; Christodoulos Daoutis; George Tasionas; Vasileios Drosos. Rehabilitation of Semi-mountainous Forest Area Using Bioclimatic Forest Constructions in Greece. Journal of Environmental Science and Engineering A 2018, 7, 1 .
AMA StyleSarantis-Angelos Liampas, Christos Stamatiou, Dimitris Farmakis, Christodoulos Daoutis, George Tasionas, Vasileios Drosos. Rehabilitation of Semi-mountainous Forest Area Using Bioclimatic Forest Constructions in Greece. Journal of Environmental Science and Engineering A. 2018; 7 (2):1.
Chicago/Turabian StyleSarantis-Angelos Liampas; Christos Stamatiou; Dimitris Farmakis; Christodoulos Daoutis; George Tasionas; Vasileios Drosos. 2018. "Rehabilitation of Semi-mountainous Forest Area Using Bioclimatic Forest Constructions in Greece." Journal of Environmental Science and Engineering A 7, no. 2: 1.
Sarantis-Angelos Liampas; Christos Stamatiou; Dimitris Farmakis; George Tasionas; Christodoulos Daoutis; Vasileios Drosos. Design and Construction of a Forest Village in Greece. Journal of Environmental Science and Engineering B 2018, 7, 1 .
AMA StyleSarantis-Angelos Liampas, Christos Stamatiou, Dimitris Farmakis, George Tasionas, Christodoulos Daoutis, Vasileios Drosos. Design and Construction of a Forest Village in Greece. Journal of Environmental Science and Engineering B. 2018; 7 (2):1.
Chicago/Turabian StyleSarantis-Angelos Liampas; Christos Stamatiou; Dimitris Farmakis; George Tasionas; Christodoulos Daoutis; Vasileios Drosos. 2018. "Design and Construction of a Forest Village in Greece." Journal of Environmental Science and Engineering B 7, no. 2: 1.
Information on public attitudes towards the use of transgenic trees in forest plantations is important in the decision-making process and policy implementation for safe tree development, particularly at the EU level. In Europe, the use of transgenic forest trees is very limited and therefore such information is completely lacking. To address this issue within the FP0905 European COST Action on the Biosafety of Transgenic Forest Trees a pioneer cross-country pilot survey on public attitudes towards the use of transgenic forest trees was conducted using young population as a focus group. This was decided mainly because this focus group represents the future consumers, policy makers or developers. Specifically, the survey aimed to: i) assess the level of young people’s knowledge about transgenic forest trees, ii) identify issues of concern to them regarding the cultivation of transgenic forest trees and iii) explore whether they approve or disapprove of the use of transgenic forest trees in plantations. Purposive sampling was performed and university students of different disciplines were included in the research as sampling subjects. In total, 1868 completed questionnaires from 15 European and non-European countries were analyzed. The young educated people that took part in the survey appeared to approve of the use of transgenic forest trees in plantations and would be willing to buy forest transgenic products. The potential loss of biodiversity due to a risk of gene flow between transgenic and wild trees was seen as the safety issue of most concern when considering the commercial release of transgenic forest trees. However, a serious perceived lack of knowledge about potential benefits and risks of the cultivation of transgenic forest trees was recorded in most of the countries. K-means clustering was implemented on respondents’ positive responses to identify potential country patterns. No differences in patterns of public attitude towards the acceptance of the commercial growing of transgenic forest trees were observed between European and non-European countries. Extended research on public attitude issues towards the use of transgenic forest trees is strongly recommended as a basis for policy implementation on safe tree development.
V. Kazana; L. Tsourgiannis; V. Iakovoglou; C. Stamatiou; A. Alexandrov; Susana Araújo; S. Bogdan; G. Bozic; R. Brus; Gerd Bossinger; A. Boutsimea; N. Celepirović; H. Cvrčková; M. Fladung; M. Ivankovic; A. Kazaklis; P. Koutsona; Z. Luthar; P. Máchová; J. Malá; K. Mara; M. Mataruga; Jana Moravčíková; D. Paffetti; J.A.P. Paiva; D. Raptis; C. Sanchez; Sandra Sharry; T. Salaj; M. Šijačić-Nikolić; N. Tel-Zur; I. Tsvetkov; C. Vettori; N. Vidal. Public attitudes towards the use of transgenic forest trees: a cross-country pilot survey. iForest - Biogeosciences and Forestry 2016, 9, 344 -353.
AMA StyleV. Kazana, L. Tsourgiannis, V. Iakovoglou, C. Stamatiou, A. Alexandrov, Susana Araújo, S. Bogdan, G. Bozic, R. Brus, Gerd Bossinger, A. Boutsimea, N. Celepirović, H. Cvrčková, M. Fladung, M. Ivankovic, A. Kazaklis, P. Koutsona, Z. Luthar, P. Máchová, J. Malá, K. Mara, M. Mataruga, Jana Moravčíková, D. Paffetti, J.A.P. Paiva, D. Raptis, C. Sanchez, Sandra Sharry, T. Salaj, M. Šijačić-Nikolić, N. Tel-Zur, I. Tsvetkov, C. Vettori, N. Vidal. Public attitudes towards the use of transgenic forest trees: a cross-country pilot survey. iForest - Biogeosciences and Forestry. 2016; 9 (2):344-353.
Chicago/Turabian StyleV. Kazana; L. Tsourgiannis; V. Iakovoglou; C. Stamatiou; A. Alexandrov; Susana Araújo; S. Bogdan; G. Bozic; R. Brus; Gerd Bossinger; A. Boutsimea; N. Celepirović; H. Cvrčková; M. Fladung; M. Ivankovic; A. Kazaklis; P. Koutsona; Z. Luthar; P. Máchová; J. Malá; K. Mara; M. Mataruga; Jana Moravčíková; D. Paffetti; J.A.P. Paiva; D. Raptis; C. Sanchez; Sandra Sharry; T. Salaj; M. Šijačić-Nikolić; N. Tel-Zur; I. Tsvetkov; C. Vettori; N. Vidal. 2016. "Public attitudes towards the use of transgenic forest trees: a cross-country pilot survey." iForest - Biogeosciences and Forestry 9, no. 2: 344-353.
Information on public awareness and acceptance issues regarding the use of Genetically Modified (GM) trees in forestry is lacking, although such information is available for GM organisms in agriculture. This is mainly due to the fact that in Europe there is no authorization for commercial planting of GM forest trees. To address this issue and within the frame of a European COST Action on the Biosafety of Transgenic Forest Trees (FP0905), a KAP (Knowledge Attitude Practice ) cross-country pilot survey was conducted among university students of different disciplines as sampling subjects. In total, 1920 completed questionnaires from 16 European and non-European countries were evaluated. The results provided novel cross-country insights into the level of public knowledge, particularly of young people and their perceptions on safety issues related to the use of GM forest trees , as well as on their attitude towards the acceptance of GM forest trees cultivation. The majority of the respondents, which was more than 60 % in all countries, approved the use of GM forest trees for commercial plantations , excluding natural forests. The majority of respondents also appeared willing to buy products from such plantations, such as wood products, pulp and paper. Over 80 % of the respondents from all countries were in favour of using labelling to identify products of GM origin, while more than 80 % of those would prefer that this labelling be legally mandatory. The top three benefits that were rated as very important in all countries involved the potential lower demand of the GM forest plantations for pesticides, the potential of GM forest trees for restoration of contaminated soils and the potential higher GM forest tree productivity. The top three GM forest tree risks that were perceived as serious hazards in all countries included the potential loss of biodiversity due to gene flow between transgenic and wild trees, the adverse effects of biotrophic processes on host ecosystems and the cultural adaptation to changing biodiversity conditions due to transgene escape. Overall, lack of knowledge regarding the potential benefits and potential risks of the cultivation of GM forest trees was observed in almost all surveyed countries.
Vassiliki Kazana; Lambros Tsourgiannis; Valasia Iakovoglou; Christos Stamatiou; Alexander Alexandrov; Susana Araújo; Saša Bogdan; Gregor Božič; Robert Brus; Gerd Bossinger; Anastasia Boutsimea; Nevenka Ćelepirović; Helena Cvrčková; Matthias Fladung; Mladen Ivanković; Angelos Kazaklis; Paraskevi Koutsona; Zlata Luthar; Pavliná Máchová; Jana Malá; Kostlend Mara; Milan Mataruga; Jana Moravcikova; Donatella Paffetti; Jorge Paiva; Dimitrios Raptis; Conchi Sanchez; Sandra Sharry; Terezia Salaj; Mirjana Šijačić-Nikolić; Noemi Tel-Zur; Ivaylo Tsvetkov; Cristina Vettori; Nieves Vidal. Public Knowledge and Perceptions of Safety Issues Towards the Use of Genetically Modified Forest Trees: A Cross-Country Pilot Survey. Biosafety of Forest Transgenic Trees 2016, 223 -244.
AMA StyleVassiliki Kazana, Lambros Tsourgiannis, Valasia Iakovoglou, Christos Stamatiou, Alexander Alexandrov, Susana Araújo, Saša Bogdan, Gregor Božič, Robert Brus, Gerd Bossinger, Anastasia Boutsimea, Nevenka Ćelepirović, Helena Cvrčková, Matthias Fladung, Mladen Ivanković, Angelos Kazaklis, Paraskevi Koutsona, Zlata Luthar, Pavliná Máchová, Jana Malá, Kostlend Mara, Milan Mataruga, Jana Moravcikova, Donatella Paffetti, Jorge Paiva, Dimitrios Raptis, Conchi Sanchez, Sandra Sharry, Terezia Salaj, Mirjana Šijačić-Nikolić, Noemi Tel-Zur, Ivaylo Tsvetkov, Cristina Vettori, Nieves Vidal. Public Knowledge and Perceptions of Safety Issues Towards the Use of Genetically Modified Forest Trees: A Cross-Country Pilot Survey. Biosafety of Forest Transgenic Trees. 2016; ():223-244.
Chicago/Turabian StyleVassiliki Kazana; Lambros Tsourgiannis; Valasia Iakovoglou; Christos Stamatiou; Alexander Alexandrov; Susana Araújo; Saša Bogdan; Gregor Božič; Robert Brus; Gerd Bossinger; Anastasia Boutsimea; Nevenka Ćelepirović; Helena Cvrčková; Matthias Fladung; Mladen Ivanković; Angelos Kazaklis; Paraskevi Koutsona; Zlata Luthar; Pavliná Máchová; Jana Malá; Kostlend Mara; Milan Mataruga; Jana Moravcikova; Donatella Paffetti; Jorge Paiva; Dimitrios Raptis; Conchi Sanchez; Sandra Sharry; Terezia Salaj; Mirjana Šijačić-Nikolić; Noemi Tel-Zur; Ivaylo Tsvetkov; Cristina Vettori; Nieves Vidal. 2016. "Public Knowledge and Perceptions of Safety Issues Towards the Use of Genetically Modified Forest Trees: A Cross-Country Pilot Survey." Biosafety of Forest Transgenic Trees , no. : 223-244.
Decisions related to the use of genetically modified (GM) forest trees could be more rational if they would take into account socio-economic considerations in addition to environmental risk assessment. This chapter presents an overview of available socio-economic approaches and tools for assessment of GM forest crops and presents options for their implementation. In particular, it explores the suitability of Cost–Benefit Analysis (CBA), a well-known method in the field of economics, for aiding the decision-making process that regulates the experimental and/or commercial release of GM forest crops. A generic catalogue of potential positive and negative externalities that can reasonably be expected as a result of commercial application of GM forest trees and which are specifically connected to modified traits was compiled to form the basis for CBA. Cost and benefit variables were grouped according to two criteria (i) the sustainability type of variables, namely environmental, economic and social variables and (ii) the affected party. The latter is particularly useful as it is related to the distributional equity of costs and benefits of GM forest trees. Finally, results from a focus group study that was organized as part of COST Action FP0905 in order to identify the most important positive and negative externalities of GM forest plantations in connection to modified traits is also presented. CBA can make a significant contribution to a more rational decision-making process towards the potential release of GM forest trees, as it would add a measure of potential contributions to social welfare. However, further research is required to provide more information on the range of potential positive and negative externalities, their quantification, and predictions at different spatial and temporal scales.
Vassiliki Kazana; Lambros Tsourgiannis; Valasia Iakovoglou; Christos Stamatiou; Angelos Kazaklis; Paraskevi Koutsona; Dimitrios Raptis; Anastasia Boutsimea; Mirjana Šijačić-Nikolić; Cristina Vettori; Matthias Fladung. Approaches and Tools for a Socio-economic Assessment of GM Forest Tree Crops: Factors for Consideration in Cost–Benefit Analyses. Biosafety of Forest Transgenic Trees 2016, 209 -221.
AMA StyleVassiliki Kazana, Lambros Tsourgiannis, Valasia Iakovoglou, Christos Stamatiou, Angelos Kazaklis, Paraskevi Koutsona, Dimitrios Raptis, Anastasia Boutsimea, Mirjana Šijačić-Nikolić, Cristina Vettori, Matthias Fladung. Approaches and Tools for a Socio-economic Assessment of GM Forest Tree Crops: Factors for Consideration in Cost–Benefit Analyses. Biosafety of Forest Transgenic Trees. 2016; ():209-221.
Chicago/Turabian StyleVassiliki Kazana; Lambros Tsourgiannis; Valasia Iakovoglou; Christos Stamatiou; Angelos Kazaklis; Paraskevi Koutsona; Dimitrios Raptis; Anastasia Boutsimea; Mirjana Šijačić-Nikolić; Cristina Vettori; Matthias Fladung. 2016. "Approaches and Tools for a Socio-economic Assessment of GM Forest Tree Crops: Factors for Consideration in Cost–Benefit Analyses." Biosafety of Forest Transgenic Trees , no. : 209-221.
Vasileios C. Drosos; Sarantis Angelos G. Liampas; Christos Stamatiou. Sustainable Development and Exploitation of Semi-mountainous Area in Greece. International Journal of Environmental Science and Development 2016, 7, 473 -479.
AMA StyleVasileios C. Drosos, Sarantis Angelos G. Liampas, Christos Stamatiou. Sustainable Development and Exploitation of Semi-mountainous Area in Greece. International Journal of Environmental Science and Development. 2016; 7 (6):473-479.
Chicago/Turabian StyleVasileios C. Drosos; Sarantis Angelos G. Liampas; Christos Stamatiou. 2016. "Sustainable Development and Exploitation of Semi-mountainous Area in Greece." International Journal of Environmental Science and Development 7, no. 6: 473-479.
A survey was carried out during a workshop of the Greek National Forest Governance Council to identify the strengths, weaknesses, opportunities and threats for sustainable forest management assessment in Greece. The National Forest Governance Council was established within the frame of the INFORM project financed through LIFE. Its main role is to support the development process of a knowledge base for development of national forest policy on sustainable forest management assessment and monitoring. This paper presents the important internal and external factors for sustainable forest management assessment identified in the four groups: strengths, weaknesses, opportunities and threats, for the forests of Eastern Macedonia and Thrace region, in Northern Greece. It also discusses the strategies for this area resulting in a good fit between the internal and external factors. SWOT provides a basic frame within which an analysis of the strategic forest planning environment towards sustainable forest management assessment can be performed.
Vassiliki Kazana; Angelos Kazaklis; Christos Stamatiou; Paraskevi Koutsona; Anastasia Boutsimea; Dimitris Fotakis. SWOT analysis for sustainable forest policy and management: a Greek case study. International Journal of Information and Decision Sciences 2015, 7, 32 .
AMA StyleVassiliki Kazana, Angelos Kazaklis, Christos Stamatiou, Paraskevi Koutsona, Anastasia Boutsimea, Dimitris Fotakis. SWOT analysis for sustainable forest policy and management: a Greek case study. International Journal of Information and Decision Sciences. 2015; 7 (1):32.
Chicago/Turabian StyleVassiliki Kazana; Angelos Kazaklis; Christos Stamatiou; Paraskevi Koutsona; Anastasia Boutsimea; Dimitris Fotakis. 2015. "SWOT analysis for sustainable forest policy and management: a Greek case study." International Journal of Information and Decision Sciences 7, no. 1: 32.