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The research presented herein explores soil organic carbon concentration (SOCC) under monodominant primeval forests of European beech trees and their association with parent material on a regional scale. Soil sampling to a maximum depth of 0.8 m was conducted in six localities in the West, East, and South Carpathians, Eastern Albanides, and Central Apennines, situated on different parent materials. Samples were analysed for SOCC by the dry combustion method. The average SOCC values representing individual localities ranged from 12.5 g kg−1 to 154.8 g kg−1 with a 99.7% coefficient of variation. SOCC association with climatic variables and forest stand volume data available from the literature were assessed by a Pearson correlation coefficient. Differences in SOCC among localities caused by site conditions were treated as a fixed factor in Welch’s ANOVA and found to be significant (p < 0.05) in the majority of cases. The associations between SOCC and climatic variables or stand volume were nonsignificant or perturbed. Since they validly explained less than 10% of the overall SOCC variance, the results of multiple comparison tests were assessed and interpreted in view of distinct parent materials.
Viliam Pichler; Erika Gömöryová; Christoph Leuschner; Marián Homolák; Ioan Abrudan; Magdaléna Pichlerová; Katarína Střelcová; Alfredo Di Filippo; Roman Sitko. Parent Material Effect on Soil Organic Carbon Concentration under Primeval European Beech Forests at a Regional Scale. Forests 2021, 12, 405 .
AMA StyleViliam Pichler, Erika Gömöryová, Christoph Leuschner, Marián Homolák, Ioan Abrudan, Magdaléna Pichlerová, Katarína Střelcová, Alfredo Di Filippo, Roman Sitko. Parent Material Effect on Soil Organic Carbon Concentration under Primeval European Beech Forests at a Regional Scale. Forests. 2021; 12 (4):405.
Chicago/Turabian StyleViliam Pichler; Erika Gömöryová; Christoph Leuschner; Marián Homolák; Ioan Abrudan; Magdaléna Pichlerová; Katarína Střelcová; Alfredo Di Filippo; Roman Sitko. 2021. "Parent Material Effect on Soil Organic Carbon Concentration under Primeval European Beech Forests at a Regional Scale." Forests 12, no. 4: 405.
Key words: forest regeneration, Conniflex, Trico, mechanical site preparation
Forest regeneration is crucial stage in commercial forest management because actions during this stage impact future forest productivity and value. Scots pine is one of the main tree species in forestry of the northern part of Europe. Foresters have to overcome different risk factors during regeneration process and two of them are seedling damage by Pine weevil (Hylobius abietis L) and browsing by herbivores of Cervidae family. Pine weevil is one of the main forest pests in Europe that damage regenerated coniferous stands. Damage caused by this pest can produce 70% mortality of planted seedlings. Another significant risk factor is browsing. With increase of deer (Cervidae) population the damaged forest area also increases to the extent that foresters choose other tree species for regeneration. The mitigation of these risks is possible with appliance of forest management practices. There are used different repelents against Cervidae animals. Regarding Pine weevil, due to restrictions on insecticide use in EU, different protective coating materials have been developed, and several studies show that soil preparation before planting reduce amount of damaged Pine seedlings and increase possibility of successful regeneration. We evaluated if and how forest management methods - soil preparation techniques (spot mounding, disc trenching) in combination with different plant protection products (Conniflex, Trico) - affects the degree of damage caused by pine weevil and Cervidae animals to Scots pine seedlings one and two years after outplanting in four forest stands in Latvia. The results from this study shows that application of Conniflex reduce number of damaged trees by 16.8% first and 20.3% second year after outplanting compared to untreated seedlings. Soil preparation has significant impact on reduction of pine weevil damage. The best results have been achieved by planting with Conniflex treated seedlings on spot mounds (2.4% damaged trees compared to 48.9% in unprepared soil without treatment). Repellent Trico do not provide additional protection against Pine weevil and do not have long term protection effect against browsing. Overall conclusion is that combination of soil preparation and use of appropriate coating material (Conniflex) can provide sufficient protection without usage of insecticides, and Trico has to be applied before winter season to achieve effect of protection.
Kārlis Dūmiņš; Sigita Timma; Dagnija Lazdiņa. Forest management practices in reduction of damage caused by Pine weevil (Hylobius abietis L.) and Cervidae animals in newly planted Scots pine forests. 2021, 1 .
AMA StyleKārlis Dūmiņš, Sigita Timma, Dagnija Lazdiņa. Forest management practices in reduction of damage caused by Pine weevil (Hylobius abietis L.) and Cervidae animals in newly planted Scots pine forests. . 2021; ():1.
Chicago/Turabian StyleKārlis Dūmiņš; Sigita Timma; Dagnija Lazdiņa. 2021. "Forest management practices in reduction of damage caused by Pine weevil (Hylobius abietis L.) and Cervidae animals in newly planted Scots pine forests." , no. : 1.
In the recent decades, forest certification based on third-party external audits has gained momentum. This type of certification has been developed as a monitoring tool aimed at improving governance in corporate environmental management and differentiating products in the increasing environmentally sensitive markets. Although the scholarly literature has extensively analyzed the adoption and dissemination of forest certification, the findings of the external audits and certification practices remain under researched. On the basis of the analysis of 105 audit reports issued by accredited third-party certification bodies in Romania, this article sheds light on procedural factors that have significant influence on the characteristics of non-conformities (NCs) identified by Forest Stewardship Council (FSC) third party audits. Our research offers empirical evidence that certain procedural factors such as the type of assessment, auditing days, number of auditors, or the presence of foreign members in an audit team have a significant influence on the auditing process outcomes: number and grade of non-conformities, standard references, or methods of NC detection. The study opens interesting new lines of research—the influence of procedural or other types of contextual factors on certification outcomes—and provides indications on the effectiveness of the certification procedures and guidelines in certification process quality assurance.
Aureliu-Florin Hălălișan; Bogdan Popa; Iñaki Saizarbitoria; Olivier Boiral; Germán Arana-Landín; Adelin-Ionuț Nicorescu; Ioan Abrudan. Procedural Factors Influencing Forest Certification Audits: An Empirical Study in Romania. Forests 2021, 12, 172 .
AMA StyleAureliu-Florin Hălălișan, Bogdan Popa, Iñaki Saizarbitoria, Olivier Boiral, Germán Arana-Landín, Adelin-Ionuț Nicorescu, Ioan Abrudan. Procedural Factors Influencing Forest Certification Audits: An Empirical Study in Romania. Forests. 2021; 12 (2):172.
Chicago/Turabian StyleAureliu-Florin Hălălișan; Bogdan Popa; Iñaki Saizarbitoria; Olivier Boiral; Germán Arana-Landín; Adelin-Ionuț Nicorescu; Ioan Abrudan. 2021. "Procedural Factors Influencing Forest Certification Audits: An Empirical Study in Romania." Forests 12, no. 2: 172.
Carbon storage and sequestration is one of the most important services provided by forest ecosystems, the most powerful tools for climate change mitigation and adaptation. Its value is not always captured and appreciated at a fair level, with people taking for granted these benefits provided by the ecosystems. Our first objective was to evaluate the amount of carbon storage and sequestration within a specific area—Retezat National Park (RNP), Romania, in a specific timeframe, using mainly the data from forest management plans. The second objective was to estimate the economic value of the carbon sequestered by the ecosystems within the national park. Based on the carbon market price, we calculated the monetary value of the sequestered carbon. The third objective was to cross-validate the model using mobile terrestrial LiDAR scanner 3D mapping technology in several field plots. Our results reveal comparable stocks of carbon with the ones modelled based on the forest management plans, enabling us to use these plans as an accurate source of information. The present study underlines that the financial effort for the management of the ecosystems which provide these services can be sustained by implementing financial mechanisms aiming to direct ecosystem services values into the management of these ecosystems.
Robert-George Pache; Ioan Vasile Abrudan; Mihai-Daniel Niță. Economic Valuation of Carbon Storage and Sequestration in Retezat National Park, Romania. Forests 2020, 12, 43 .
AMA StyleRobert-George Pache, Ioan Vasile Abrudan, Mihai-Daniel Niță. Economic Valuation of Carbon Storage and Sequestration in Retezat National Park, Romania. Forests. 2020; 12 (1):43.
Chicago/Turabian StyleRobert-George Pache; Ioan Vasile Abrudan; Mihai-Daniel Niță. 2020. "Economic Valuation of Carbon Storage and Sequestration in Retezat National Park, Romania." Forests 12, no. 1: 43.
The rising global population size has placed increasing demands for acquisition and sustainable use of renewable resources and carbon sink. One of the ways to meet this demand and realise Green deal is by planting fast growing trees such as Alnus incana, Betula pendula, Salix sp., Populus tremuloides x Populus tremula for short rotation forestry (SRF) or short rotation coppice (SRC). The area of these plantations is increasing. The main benefit of these plantations is renewable wood energy. There can be also additional benefits for ecosystem services if the plantation is fully used. The aim of the study was to describe the ecosystem services offered by SRC and SRF in comparison to intensive agriculture. We studied the occurrence of herbaceous plant species in an experimental tree stand in Skriveri district in Latvia. The cover of plants was estimated in plots. The results showed a multitude of other ecosystem services offered by the plantation. In grassland belts between tree rows, provisioning ecosystem services included plants for medicinal purposes and teas, as well as forage species for livestock feed. Regulating ecosystem services included nectar plants for pollination with added value of honey production. The most intensive blooming and pollen season was from April to October, when 20 species of nectar plants were blooming. Trees and herbs with microbial nitrogen fixing associations had potential for soil improvement. The fast-growing trees can sequester carbon and mitigate climate change. Compared to cultivated grassland with one or a few species, SRC and SRF provides a greater variety of ecosystem services.
Vita Krēsliņa; Dagnija Lazdiņa; Guntis Brumelis. Ecosystem Services in Short Rotation Coppice Forestry on Former Arable Land. 2020, 1 .
AMA StyleVita Krēsliņa, Dagnija Lazdiņa, Guntis Brumelis. Ecosystem Services in Short Rotation Coppice Forestry on Former Arable Land. . 2020; ():1.
Chicago/Turabian StyleVita Krēsliņa; Dagnija Lazdiņa; Guntis Brumelis. 2020. "Ecosystem Services in Short Rotation Coppice Forestry on Former Arable Land." , no. : 1.
Wood ash recycling can be a reasonable method for energy producers to decrease waste problems. Using wood ash as a fertilizer or liming material could improve soil macro and micronutrient content in peat soils. Therefore, the effect of wood ash on Norway spruce (Picea abies (L.) Karst) and Scots pine (Pinus sylvestris L.) juvenile growth and nutrient content in the soil after spreading wood ash in medium to high doses before and after planting seedlings was investigated in peat forests in the Eastern part of Latvia. The aim of the study was to evaluate the effect of high doses of wood ash on soil properties and the growth of planted Norway spruce and Scots pine seedlings up to 10 years after experiment establishment. Wood ash was applied a year before planting seedlings in doses of 5 and 10 t ha−1 and right after planting in concentrations of 5, 10, 15, and 20 t ha−1. Changes in macronutrient content (i.e., phosphorus [P], and potassium [K]) and tree height and diameter at breast height were measured at one and 10 years after establishing the experiment. Fertilization one year prior to planting the seedlings exhibited a positive response on tree height and diameter growth compared to fertilization after the seedlings were planted. Soil samples from fertilized plots one year after establishment contained more P and K in the soil than the control plots. Wood ash application of the highest doses did not reach the overdose limit, as the tree growth (height and diameter at breast height) results of fertilized plots were similar to those of the control fields; therefore, no significant negative effect on tree growth was discovered.
Baiba Jansone; Valters Samariks; Modris Okmanis; Dārta Kļaviņa; Dagnija Lazdiņa. Effect of High Concentrations of Wood Ash on Soil Properties and Development of Young Norway Spruce (Picea abies (L.) Karst) and Scots Pine (Pinus sylvestris L.). Sustainability 2020, 12, 9479 .
AMA StyleBaiba Jansone, Valters Samariks, Modris Okmanis, Dārta Kļaviņa, Dagnija Lazdiņa. Effect of High Concentrations of Wood Ash on Soil Properties and Development of Young Norway Spruce (Picea abies (L.) Karst) and Scots Pine (Pinus sylvestris L.). Sustainability. 2020; 12 (22):9479.
Chicago/Turabian StyleBaiba Jansone; Valters Samariks; Modris Okmanis; Dārta Kļaviņa; Dagnija Lazdiņa. 2020. "Effect of High Concentrations of Wood Ash on Soil Properties and Development of Young Norway Spruce (Picea abies (L.) Karst) and Scots Pine (Pinus sylvestris L.)." Sustainability 12, no. 22: 9479.
This paper analyses how forestry standardization process interrelates with the national and sectoral economic characteristics and the evolution of sustainable forest management implementation in communist and post-communist Romania. The study used the database of Romanian Standardization Association for selecting forestry specific standards, which have been issued since 1949. The selected standards were grouped according to their scope, issuing period and international recognition, and the obtained distributions were analysed in the context of sectoral economic evolution. In the communist period, the long-term sectoral strategy, which was centred on sustainable forest management, added value products and export was accompanied by a sustained effort in standardizing the design and quality of forest products, as well as the needed processes. Based on standardization, the efficient and integrated forest industry acted in the framework of a prescriptively regulated sustainable forest management. Mandatory national standards from the communist period have been mostly replaced by post-communist consensual international standards. The opportunities of a market economy and EU trade supported a private forest industry that is increasingly efficient, productive and innovative. However, considering the high forestry sector environmental and social sustainability requirements, the state authorities must carefully address their mission of balancing different interests, for which standardization may provide very useful tools.
Aureliu-Florin Hălălișan; Adelin-Ionuț Nicorescu; Bogdan Popa; Nikolay Neykov; Viorel Marinescu; Ioan Vasile Abrudan. The relationships between forestry sector standardization, market evolution and sustainability approaches in the communist and post-communist economies: the case of Romania. Notulae Botanicae Horti Agrobotanici Cluj-Napoca 2020, 48, 1683 -1698.
AMA StyleAureliu-Florin Hălălișan, Adelin-Ionuț Nicorescu, Bogdan Popa, Nikolay Neykov, Viorel Marinescu, Ioan Vasile Abrudan. The relationships between forestry sector standardization, market evolution and sustainability approaches in the communist and post-communist economies: the case of Romania. Notulae Botanicae Horti Agrobotanici Cluj-Napoca. 2020; 48 (3):1683-1698.
Chicago/Turabian StyleAureliu-Florin Hălălișan; Adelin-Ionuț Nicorescu; Bogdan Popa; Nikolay Neykov; Viorel Marinescu; Ioan Vasile Abrudan. 2020. "The relationships between forestry sector standardization, market evolution and sustainability approaches in the communist and post-communist economies: the case of Romania." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 48, no. 3: 1683-1698.
Kristaps Makovskis; Dagnija Lazdina; Igors Gusarevs; Germans Gusarevs. Trapezoidal drainage bucket and mpvs mounding device productivity and mound quality comparison. 20th International Scientific Conference Engineering for Rural Development Proceedings 2020, 1 .
AMA StyleKristaps Makovskis, Dagnija Lazdina, Igors Gusarevs, Germans Gusarevs. Trapezoidal drainage bucket and mpvs mounding device productivity and mound quality comparison. 20th International Scientific Conference Engineering for Rural Development Proceedings. 2020; ():1.
Chicago/Turabian StyleKristaps Makovskis; Dagnija Lazdina; Igors Gusarevs; Germans Gusarevs. 2020. "Trapezoidal drainage bucket and mpvs mounding device productivity and mound quality comparison." 20th International Scientific Conference Engineering for Rural Development Proceedings , no. : 1.
In many countries, National Forest Inventory (NFI) data is used to assess the variability of forest growth across the country. The identification of areas with similar growths provides the foundation for development of regional models. The objective of the present study is to identify areas with similar diameter and basal area growth using increment cores acquired by the NFI for the three main Romanian species: Norway spruce (Picea abies L. Karst), European beech (Fagus sylvatica L.), and Sessile oak (Quercus petraea (Matt.) Liebl.). We used 6536 increment cores with ages less than 100 years, a total of 427,635 rings. The country was divided in 21 non-overlapping ecoregions based on geomorphology, soil, geology and spatial contiguousness. Mixed models and multivariate analyses were used to assess the differences in annual dimeter at breast height and basal area growth among ecoregions. Irrespective of the species, the mixed models analysis revealed significant differences in growth between the ecoregions. However, some ecoregions were similar in terms of growth and could be aggregated. Multivariate analysis reinforced the difference between ecoregions and showed no temporal grouping for spruce and beech. Sessile oak growth was separated not only by ecoregions, but also by time, with some ecoregions being more prone to draught. Our study showed that countries of median size, such as Romania, could exhibit significant spatial differences in forest growth. Therefore, countrywide growth models incorporate too much variability to be considered operationally feasible. Furthermore, it is difficult to justify the current growth and yield models as a legal binding planning tool.
Gheorghe Marin; Vlad C. Strimbu; Ioan V. Abrudan; Bogdan M. Strimbu. Regional Variability of the Romanian Main Tree Species Growth Using National Forest Inventory Increment Cores. Forests 2020, 11, 409 .
AMA StyleGheorghe Marin, Vlad C. Strimbu, Ioan V. Abrudan, Bogdan M. Strimbu. Regional Variability of the Romanian Main Tree Species Growth Using National Forest Inventory Increment Cores. Forests. 2020; 11 (4):409.
Chicago/Turabian StyleGheorghe Marin; Vlad C. Strimbu; Ioan V. Abrudan; Bogdan M. Strimbu. 2020. "Regional Variability of the Romanian Main Tree Species Growth Using National Forest Inventory Increment Cores." Forests 11, no. 4: 409.
The chapter summarises the research data on cultivating forest crops in abandoned and marginal farmlands (AL). The course of growth and productivity of different tree species in the local climatic conditions is clarified in a variety of agricultural soils. The research results show the most appropriate tree species for short-rotation or special end-use monoculture or mixed plantations, using Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies (L.) Karst.), silver birch (Betula pendula Roth.), pedunculate oak (Quercus robur L.), grey alder (Alnus incana (L.) Moench), alder (Alnus glutinosa (L.) Gaertn.), wild cherry (Cerasus avium (L.) Moench syn. Prunus avium), aspen (Populus tremula L.), hybrid aspen (Populus tremula x tremuloides), and small-leaved lime (Tilia cordata Mill.). At the same time, research results show sustainability of management of plantation forests—positive impact on soil agrochemical properties, proportionate changes on above-ground vegetation, and improvement of economic benefits of farmlands.
Mudrite Daugaviete; Dagnija Lazdina; Baiba Bambe; Andis Lazdins; Kristaps Makovskis; Uldis Daugavietis. Plantation Forests: A Guarantee of Sustainable Management of Abandoned and Marginal Farmlands. Energy Efficiency and Sustainable Lighting - a Bet for the Future 2020, 1 .
AMA StyleMudrite Daugaviete, Dagnija Lazdina, Baiba Bambe, Andis Lazdins, Kristaps Makovskis, Uldis Daugavietis. Plantation Forests: A Guarantee of Sustainable Management of Abandoned and Marginal Farmlands. Energy Efficiency and Sustainable Lighting - a Bet for the Future. 2020; ():1.
Chicago/Turabian StyleMudrite Daugaviete; Dagnija Lazdina; Baiba Bambe; Andis Lazdins; Kristaps Makovskis; Uldis Daugavietis. 2020. "Plantation Forests: A Guarantee of Sustainable Management of Abandoned and Marginal Farmlands." Energy Efficiency and Sustainable Lighting - a Bet for the Future , no. : 1.
The article [Effect of soil preparation method on root development of P. sylvestris and P. abies saplings in commercial forest stands], written by [Santa Celma, Katrīna Blate, Dagnija Lazdiņa, Kārlis Dūmiņš, Santa Neimane, Toms A. Štāls, Kristīne Štikāne], was originally published Online First without Open Access. After publication in volume [#], issue [#], page [#-#], the author decided to opt for Open Choice and to make the article an Open Access publication. Therefore, the copyright of the article has been changed to © The Author(s) [2020] and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Santa Celma; Katrīna Blate; Dagnija Lazdiņa; Kārlis Dūmiņš; Santa Neimane; Toms A. Štāls; Kristīne Štikāne. Correction to: Effect of soil preparation method on root development of P. sylvestris and P. abies saplings in commercial forest stands. New Forests 2020, 51, 909 -909.
AMA StyleSanta Celma, Katrīna Blate, Dagnija Lazdiņa, Kārlis Dūmiņš, Santa Neimane, Toms A. Štāls, Kristīne Štikāne. Correction to: Effect of soil preparation method on root development of P. sylvestris and P. abies saplings in commercial forest stands. New Forests. 2020; 51 (5):909-909.
Chicago/Turabian StyleSanta Celma; Katrīna Blate; Dagnija Lazdiņa; Kārlis Dūmiņš; Santa Neimane; Toms A. Štāls; Kristīne Štikāne. 2020. "Correction to: Effect of soil preparation method on root development of P. sylvestris and P. abies saplings in commercial forest stands." New Forests 51, no. 5: 909-909.
A. Bardule; M. Bertins; L. Busa; Dagnija Lazdina; A. Viksna; M. Tvrdonova; V. Kanicky; Tomas Vaculovic. Variation of major elements and heavy metals occurrence in hybrid aspen (Populus tremuloides Michx. × P. tremula L.) tree rings in marginal land. iForest - Biogeosciences and Forestry 2020, 13, 24 -32.
AMA StyleA. Bardule, M. Bertins, L. Busa, Dagnija Lazdina, A. Viksna, M. Tvrdonova, V. Kanicky, Tomas Vaculovic. Variation of major elements and heavy metals occurrence in hybrid aspen (Populus tremuloides Michx. × P. tremula L.) tree rings in marginal land. iForest - Biogeosciences and Forestry. 2020; 13 (1):24-32.
Chicago/Turabian StyleA. Bardule; M. Bertins; L. Busa; Dagnija Lazdina; A. Viksna; M. Tvrdonova; V. Kanicky; Tomas Vaculovic. 2020. "Variation of major elements and heavy metals occurrence in hybrid aspen (Populus tremuloides Michx. × P. tremula L.) tree rings in marginal land." iForest - Biogeosciences and Forestry 13, no. 1: 24-32.
This study deals with approaches for a social-ecological friendly European bioeconomy based on biomass from industrial crops cultivated on marginal agricultural land. The selected crops to be investigated are: Biomass sorghum, camelina, cardoon, castor, crambe, Ethiopian mustard, giant reed, hemp, lupin, miscanthus, pennycress, poplar, reed canary grass, safflower, Siberian elm, switchgrass, tall wheatgrass, wild sugarcane, and willow. The research question focused on the overall crop growth suitability under low-input management. The study assessed: (i) How the growth suitability of industrial crops can be defined under the given natural constraints of European marginal agricultural lands; and (ii) which agricultural practices are required for marginal agricultural land low-input systems (MALLIS). For the growth-suitability analysis, available thresholds and growth requirements of the selected industrial crops were defined. The marginal agricultural land was categorized according to the agro-ecological zone (AEZ) concept in combination with the marginality constraints, so-called ‘marginal agro-ecological zones’ (M-AEZ). It was found that both large marginal agricultural areas and numerous agricultural practices are available for industrial crop cultivation on European marginal agricultural lands. These results help to further describe the suitability of industrial crops for the development of social-ecologically friendly MALLIS in Europe.
Moritz Von Cossel; Iris Lewandowski; Berien Elbersen; Igor Staritsky; Michiel Van Eupen; Yasir Iqbal; Stefan Mantel; Danilo Scordia; Giorgio Testa; Salvatore Luciano Cosentino; Oksana Maliarenko; Ioannis Eleftheriadis; Federica Zanetti; Andrea Monti; Dagnija Lazdina; Santa Neimane; Isabelle Lamy; Lisa Ciadamidaro; Marina Sanz; Juan Esteban Carrasco; Pilar Ciria; Ian McCallum; Luisa M. Trindade; Eibertus N. Van Loo; Wolter Elbersen; Ana Luisa Fernando; Eleni G. Papazoglou; Efthymia Alexopoulou. Marginal Agricultural Land Low-Input Systems for Biomass Production. Energies 2019, 12, 3123 .
AMA StyleMoritz Von Cossel, Iris Lewandowski, Berien Elbersen, Igor Staritsky, Michiel Van Eupen, Yasir Iqbal, Stefan Mantel, Danilo Scordia, Giorgio Testa, Salvatore Luciano Cosentino, Oksana Maliarenko, Ioannis Eleftheriadis, Federica Zanetti, Andrea Monti, Dagnija Lazdina, Santa Neimane, Isabelle Lamy, Lisa Ciadamidaro, Marina Sanz, Juan Esteban Carrasco, Pilar Ciria, Ian McCallum, Luisa M. Trindade, Eibertus N. Van Loo, Wolter Elbersen, Ana Luisa Fernando, Eleni G. Papazoglou, Efthymia Alexopoulou. Marginal Agricultural Land Low-Input Systems for Biomass Production. Energies. 2019; 12 (16):3123.
Chicago/Turabian StyleMoritz Von Cossel; Iris Lewandowski; Berien Elbersen; Igor Staritsky; Michiel Van Eupen; Yasir Iqbal; Stefan Mantel; Danilo Scordia; Giorgio Testa; Salvatore Luciano Cosentino; Oksana Maliarenko; Ioannis Eleftheriadis; Federica Zanetti; Andrea Monti; Dagnija Lazdina; Santa Neimane; Isabelle Lamy; Lisa Ciadamidaro; Marina Sanz; Juan Esteban Carrasco; Pilar Ciria; Ian McCallum; Luisa M. Trindade; Eibertus N. Van Loo; Wolter Elbersen; Ana Luisa Fernando; Eleni G. Papazoglou; Efthymia Alexopoulou. 2019. "Marginal Agricultural Land Low-Input Systems for Biomass Production." Energies 12, no. 16: 3123.
This article aims to analyze the adoption of FSC Chain of Custody certification scheme in connection with the adoption of the main general meta-standards (e.g.ISO certifiable standards), in a challenging context such as that faced by Romanian forestry companies. Using a questionnaire-based survey covering a large number of recently certified firms, the study sheds light on the profile of these companies, the drivers of certification, its economic aspects, the perceived benefits, the intention to keep the Chain of Custody certification, as well as some aspects of the joint adoption of FSC Chain of Custody certifiable standards and general meta-standards. The findings show that companies in the sector use the FSC Chain of Custody certification scheme to maintain their external market and to improve their reputation in a context were the image of the Romanian forest sector has been questioned in the media. Premium price for certified products is pointed out by most of the respondents as one of the benefits, although the mentioned premium is below 5% for the majority of them. More than half of the companies have at least one type of ISO certification. Implications for scholars, managers and decisions markers are discussed in the article. Spanish Este artículo tiene como objetivo analizar la adopción del esquema de certificación de Cadena de Custodia FSC con relación a la adopción de los principales meta-estándares generales tales, como los estándares de gestión certificables ISO, en un contexto especial como al que se enfrentan las empresas forestales rumanas. Con base en un estudio empírico cuantitativo en el que participaron un elevado número de empresas recientemente certificadas, el estudio analiza el perfil de estas empresas, los factores motivadores de la certificación, sus aspectos económicos, los beneficios percibidos, la intención de mantener la certificación de la Cadena de Custodia, así como algunos aspectos de la adopción conjunta de estándares de certificación de la Cadena de Custodia FSC y meta-estándares generales. Los resultados muestran que las empresas del sector utilizan la certificación de la Cadena de Custodia forestal para mantener su mercado exterior y mejorar su reputación, en un contexto en el que la imagen del sector forestal rumano en los medios de comunicación ha sido cuestionada. La prima o sobreprecio a pagar por los productos certificados es señalado por la mayoría de los encuestados como uno de los beneficios destacados, aunque la prima indicada es inferior a un 5% para la mayoría de ellos. Más de la mitad de las empresas cuentan al menos algún tipo de certificación ISO. El artículo incluyen implicaciones académicas, así como implicaciones para directivos y decisores públicos. French Cet article cherche à analyser l'adoption d'un schème de certification d'une chaîne de garde de bois FSC allant de pair avec une adoption des principaux méta standards généraux (par exemple: les normes certifiables) dans un contexte difficile tel que celui auquel doivent faire face les entreprises forestières roumaines. En utilisant une étude basée sur un questionnaire comprenant un nombre important de compagnies ayant été récemment certifiées, l'étude met en lumière le profil de ces compagnies, les conducteurs de certification, les aspects économiques, comment les bénéfices sont considérés, l'intention de préserver la certification de la chaîne de garde, ainsi que certains aspects de l'adoption jointe des normes certifiables de la chaîne de garde FSC et des méta standards généraux. Les résultats montrent que les compagnies du secteur utilisent le schème de certification de la chaîne de garde FSC pour maintenir leur marché extérieur et pour améliorer leur réputation dans un contexte où l'image du secteur forestier roumain a été mis en question dans les médias. Le prix premium des produits certifiés est cité par la plupart des interlocuteurs comme étant l'un des bénéfices, quoique le premium mentionné soit en dessous de 5% dans leur majorité. Plus de la moitié des compagnies possèdent au moins un type de certification ISO. Les implications pour les savants, les directeurs et les décideurs sont explorées dans l'article.
A.F. Halalisan; Bogdan Popa; I. Heras-Saizarbitoria; F. Ioras; Ioan Vasile Abrudan. Drivers, perceived benefits and impacts of FSC Chain of Custody Certification in a challenging sectoral context: the case of Romania. International Forestry Review 2019, 21, 195 -211.
AMA StyleA.F. Halalisan, Bogdan Popa, I. Heras-Saizarbitoria, F. Ioras, Ioan Vasile Abrudan. Drivers, perceived benefits and impacts of FSC Chain of Custody Certification in a challenging sectoral context: the case of Romania. International Forestry Review. 2019; 21 (2):195-211.
Chicago/Turabian StyleA.F. Halalisan; Bogdan Popa; I. Heras-Saizarbitoria; F. Ioras; Ioan Vasile Abrudan. 2019. "Drivers, perceived benefits and impacts of FSC Chain of Custody Certification in a challenging sectoral context: the case of Romania." International Forestry Review 21, no. 2: 195-211.
Dagnija Lazdina; Karlis Dumins; Timo Saksa; Kristaps Makovskis. Evaluation of forest tree planting machine effectiveness. Engineering for Rural Development 2019, 1 .
AMA StyleDagnija Lazdina, Karlis Dumins, Timo Saksa, Kristaps Makovskis. Evaluation of forest tree planting machine effectiveness. Engineering for Rural Development. 2019; ():1.
Chicago/Turabian StyleDagnija Lazdina; Karlis Dumins; Timo Saksa; Kristaps Makovskis. 2019. "Evaluation of forest tree planting machine effectiveness." Engineering for Rural Development , no. : 1.
Considering the increasing use of wood biomass for energy and the related intensification of forest management, the impacts of different intensities of biomass harvesting on nutrient leaching risks must be better understood. Different nitrogen forms in the soil solution were monitored for 3 to 6 years after harvesting in hemiboreal forests in Latvia to evaluate the impacts of different biomass harvesting regimes on local nitrogen leaching risks, which potentially increase eutrophication in surface waters. In forestland dominated by Scots pine L. or Norway spruce L. (Karst.), the soil solution was sampled in: (i) stem-only harvesting (SOH), (ii) wholeâtree harvesting, with only slash removed (WTH), and (iii) wholeâtree harvesting, with both slash and stumps harvested (WTHâ+âSB), subplots. In agricultural land, sampling was performed in an initially fertilised hybrid aspen ( L.Ã Michx.) short-rotation coppice (SRC), where above-ground biomass was harvested. In forestland, soil solution N (nitrogen) concentrations were highest in the second and third year after harvesting. Mean annual values in WTH subplots of medium to high fertility sites exceeded the mean values in SOH subplots and control subplots (mature stand where no harvesting was performed) for the entire study period; the opposite trend was observed for the low-fertility site. Biomass harvesting in the hybrid aspen SRC only slightly affected NO-N (nitrate nitrogen) and NH-N (ammonium nitrogen) concentrations in the soil solution within 3 years after harvesting, but a significant decrease in the TN (total nitrogen) concentration in the soil solution was found in plots with additional N fertilisation performed once initially.Pinus sylvestrisPicea abiesPopulus tremulaP. tremuloides3â4+
Ivars Kļaviņš; Arta Bārdule; Zane Lībiete; Dagnija Lazdiņa; Andis Lazdiņš. Impact of biomass harvesting on nitrogen concentration in the soil solution in hemiboreal woody ecosystems. Silva Fennica 2019, 53, 1 .
AMA StyleIvars Kļaviņš, Arta Bārdule, Zane Lībiete, Dagnija Lazdiņa, Andis Lazdiņš. Impact of biomass harvesting on nitrogen concentration in the soil solution in hemiboreal woody ecosystems. Silva Fennica. 2019; 53 (4):1.
Chicago/Turabian StyleIvars Kļaviņš; Arta Bārdule; Zane Lībiete; Dagnija Lazdiņa; Andis Lazdiņš. 2019. "Impact of biomass harvesting on nitrogen concentration in the soil solution in hemiboreal woody ecosystems." Silva Fennica 53, no. 4: 1.
Karlis Dumins; Dagnija Lazdina. orest regeneration quality – factors affecting first year survival of planted trees. 2018, 1 .
AMA StyleKarlis Dumins, Dagnija Lazdina. orest regeneration quality – factors affecting first year survival of planted trees. . 2018; ():1.
Chicago/Turabian StyleKarlis Dumins; Dagnija Lazdina. 2018. "orest regeneration quality – factors affecting first year survival of planted trees." , no. : 1.
Although it is commonly assumed that biomass allometric models are site specific, evaluations of site-effects are rarely undertaken. In this paper we develop biomass-allometric models to determine site influences. This study is based on data from 240 Norway spruce trees (Picea abies (L.) Karst.), growing in 24 early-growth plantations. A multilevel modelling approach was adopted and intraclass correlation was used to evaluate site effects. Results indicated that biomass allometric models were highly specific to sites and that, depending on the biomass component and the type of predictor adopted, some 33% and 86% of overall model variance could be attributed to forest stand effects. The remaining variance was attributable within stand variability. Stem biomass was the most site-specific biomass component whereas branch biomass was the least influenced by site effects. Diameter at collar height (D) was less site-specific than height (H) in predicting biomass. Using D and H within the same model as distinct predictors, although improving the model fit, increased the model site-specificity. However, when D and H were combined in one predictor expression (i.e. D2H), this reduced model site specificity, despite requiring fewer parameters than other models. This also compensated for undesirable collinearity effects amongst predictor variables. Furthermore, for the sampled diameter range, the site-specificity was mainly driven by biomass allocation pattern (to branches, needles and roots). The considerable between site variability of allometric relationships suggests that consideration of stand effects is essential for the robust prediction of biomass.
Ioan Dutcă; Richard Mather; Viorel N.B. Blujdea; Florin Ioraș; Mănăilă Olari; Ioan Vasile Abrudan. Site-effects on biomass allometric models for early growth plantations of Norway spruce (Picea abies (L.) Karst.). Biomass and Bioenergy 2018, 116, 8 -17.
AMA StyleIoan Dutcă, Richard Mather, Viorel N.B. Blujdea, Florin Ioraș, Mănăilă Olari, Ioan Vasile Abrudan. Site-effects on biomass allometric models for early growth plantations of Norway spruce (Picea abies (L.) Karst.). Biomass and Bioenergy. 2018; 116 ():8-17.
Chicago/Turabian StyleIoan Dutcă; Richard Mather; Viorel N.B. Blujdea; Florin Ioraș; Mănăilă Olari; Ioan Vasile Abrudan. 2018. "Site-effects on biomass allometric models for early growth plantations of Norway spruce (Picea abies (L.) Karst.)." Biomass and Bioenergy 116, no. : 8-17.
This paper investigates the consequences of ignoring the clustered data structure on allometric models. Clustered data, in the form of multiple trees sampled from multiple forest stands is commonly used to develop biomass allometric models. Of 102 reviewed papers published between 2012 and 2016 that reported biomass allometric models, 84 (82%) have used a clustered sampling design. However, in as many as 80% of these, the clustered data structure was ignored, potentially violating the independence assumption in ordinary least squares methods. The consequences of ignoring clustered data structure were empirically validated using two clustered biomass datasets (of 110 and 220 trees, with the cluster size of 5 and 10 trees respectively). We showed that when Intraclass Correlation Coefficient (ICC) was higher than zero, ignoring the clustered data structure returned underestimated standard errors, affecting further the confidence interval and t-test results. The underestimation level depended on ICC (which shows the variance proportion that was caused by the forest stand) and on cluster size (the number of trees sampled from one forest stand). We also showed that using first-order autocorrelation tests, such as the traditional Durbin-Watson statistic, to detect the autocorrelation due to clustered structure could be misleading as the test may show lack of autocorrelation even though ICC is different from zero. In conclusion, when ICC is higher than zero, ignoring the clustered data structure yields over-confident biomass predictions (due to underestimated confidence interval) and/or incorrect research conclusions (due to overestimated evidence against null hypothesis in t-test). Therefore, using a modelling approach that accounts for the hierarchical structure of the data is highly recommended when any form of clustering can be identified, even if the autocorrelation is not significant.
Ioan Dutcă; Petru Tudor Stăncioiu; Ioan Vasile Abrudan; Florin Ioraș. Using clustered data to develop biomass allometric models: The consequences of ignoring the clustered data structure. PLoS ONE 2018, 13, e0200123 .
AMA StyleIoan Dutcă, Petru Tudor Stăncioiu, Ioan Vasile Abrudan, Florin Ioraș. Using clustered data to develop biomass allometric models: The consequences of ignoring the clustered data structure. PLoS ONE. 2018; 13 (8):e0200123.
Chicago/Turabian StyleIoan Dutcă; Petru Tudor Stăncioiu; Ioan Vasile Abrudan; Florin Ioraș. 2018. "Using clustered data to develop biomass allometric models: The consequences of ignoring the clustered data structure." PLoS ONE 13, no. 8: e0200123.
Forestland privatization and transition to a market economy triggered important changes in the Romanian forest sector, imposing challenges for forest management structures. Voluntary forest management certification has been considered a possible solution; therefore, the certified forest area has increased rapidly regardless of the land owner. The purpose of this study is to provide an insight into the certification process. It presents the result of a survey applied to 417 forest management structures in Romania, which was intended to identify the perception of their managers regarding the reasons to adopt certification, the changes determined by the certification, the problems during the process, and the benefits. The study reveals the difference in perception among different types of forest management structures. Non-state management structures voluntarily adopted FSC certification, mainly aiming to obtain economic advantages. Most of the respondents indicated important changes in the consultation with stakeholders including local communities, transparency and clear records, the use of chemicals, and biodiversity protection. Although the FSC certification was not perceived as solving issues like illegal logging, there is a general perception that it improved forest management. The study concludes that the FSC certification proves the willingness of the Romanian forest management sector to cope with the market and trends and clarify its position in society.
Aureliu Florin Halalisan; Ioan Vasile Abrudan; Bogdan Popa. Forest Management Certification in Romania: Motivations and Perceptions. Forests 2018, 9, 425 .
AMA StyleAureliu Florin Halalisan, Ioan Vasile Abrudan, Bogdan Popa. Forest Management Certification in Romania: Motivations and Perceptions. Forests. 2018; 9 (7):425.
Chicago/Turabian StyleAureliu Florin Halalisan; Ioan Vasile Abrudan; Bogdan Popa. 2018. "Forest Management Certification in Romania: Motivations and Perceptions." Forests 9, no. 7: 425.