样式: 排序: IF: - GO 导出 标记为已读
-
100 years of change in an old-growth Scots pine forest in Hamra National Park: insights from permanent plots established in central Sweden in 1922 Scand. J. For. Res. (IF 1.8) Pub Date : 2024-01-30 Magdalena Fassl, Per Linder, Lars Östlund
Hamra National Park in the province of Dalarna in central Sweden was established in 1909 to protect a unique unlogged old-growth forest. In 1922, Henrik Hesselman set up two permanent plots in Hamr...
-
Temporal changes in forest floor carbon stocks following scarification in boreal lichen woodlands Scand. J. For. Res. (IF 1.8) Pub Date : 2024-01-30 Boris Dufour, François Hébert, Jean-François Boucher
Uncertainties remain regarding the carbon (C) loss due to scarification in afforested lichen woodlands (LW), which originate from regeneration failures of closed-crown black spruce- feathermoss sta...
-
Abandoning conversion from even-aged to uneven-aged forest stands – the effects on production and economic returns Scand. J. For. Res. (IF 1.8) Pub Date : 2024-01-22 Nils Fahlvik, Renats Trubins, Emma Holmström, Johan Sonesson, Tomas Lundmark, Urban Nilsson
There is growing interest in continuous cover forestry in Sweden. The historical domination of even-aged forest management means there is a need to focus on methods for transforming even-aged to un...
-
Gas exchange and 13C-based estimates of intrinsic water-use efficiency show different responses to CO2 enrichment: a global meta-analysis of experimental studies Scand. J. For. Res. (IF 1.8) Pub Date : 2024-01-12 Gang Liu, Xiuwei Wang
Tree intrinsic water-use efficiency (iWUE) is a key characteristic of ecosystem functions central to the global cycles of carbon, water, and energy. Gas exchange and stable carbon isotope compositi...
-
Natural regeneration and early development of Scots pine seedlings after gap cutting in northern Finland Scand. J. For. Res. (IF 1.8) Pub Date : 2024-01-11 Janne Miettinen, Ville Hallikainen, Sauli Valkonen, Hannu Hökkä, Mikko Hyppönen, Pasi Rautio
In the northern boreal region, tree growth, timber yields and economic returns are low, meaning low regeneration costs are the basis of profitable forestry. If natural regeneration is successful, i...
-
Plasticity in nitrogen form uptake and preference in response to long-term nitrogen addition of the main tree species in a temperate old growth forest Scand. J. For. Res. (IF 1.8) Pub Date : 2023-12-30 Yajuan Xing, Guancheng Liu, Wenjing Sun, Guoyong Yan, Qinggui Wang
We conducted a short-term field hydroponic 15N labeling experiment to study the effects of different nitrogen (N) addition treatment on the N uptake preference and rate of plant fine roots in a tem...
-
Flowering variation and its effect on the gene diversity of seed crops in a clonal seed orchard of Pinus koraiensis Siebold et Zucc. Scand. J. For. Res. (IF 1.8) Pub Date : 2023-12-28 Ye-Ji Kim, Ji-Min Park, Da-Eun Gu, Da-Bin Yeom, Hae-In Kang, Kyu-Suk Kang
Pinus koraiensis, an economically and ecologically vital five-needle pine species, was surveyed for female and male strobilus production variation among 52 clones over five years in a seed orchard ...
-
Seedling damage caused by wood harvesting and soil scarification in rotation and continuous cover forestry in Scots-pine-dominated boreal forests Scand. J. For. Res. (IF 1.8) Pub Date : 2023-12-21 Paula Jylhä, Juha Laitila, Ville Hallikainen, Pasi Aatsinki, Mikael Kukkonen, Anu Hilli, Esa Huhta, Sauli Valkonen, Lauri Karvonen, Pasi Rautio
Continuous cover forestry (CCF) is gaining popularity as an alternative to rotation forest management (RFM), especially in forests with multiple uses. The success of CCF depends on the amount and q...
-
Predicting snow damage in conifer forests using a mechanistic snow damage model and high-resolution snow accumulation data Scand. J. For. Res. (IF 1.8) Pub Date : 2023-12-21 Peter Zubkov, Barry Gardiner, Bjørn Egil Nygaard, Sigmund Guttu, Svein Solberg, Tron Eid
Forest damage caused by heavy wet snow accumulation in the canopy is the second most important abiotic forest disturbance agent in Nordic conifer stands after wind. The extent and frequency of snow...
-
Bark beetle damage in Norwegian forests: a study of model suitability and projected impact under climate change Scand. J. For. Res. (IF 1.8) Pub Date : 2023-12-21 Joyce Machado Nunes Romeiro, Jostein Gohli, Paal Krokene, Tron Eid, Clara Antón Fernández
Bark beetle (Ips typographus) outbreaks have the potential to damage large areas of spruce-dominated forests in Scandinavia. To define forest management strategies that will minimize the risk of ba...
-
Citizens’ knowledge of and perceptions of multi-storey wood buildings in seven European countries Scand. J. For. Res. (IF 1.8) Pub Date : 2023-12-21 A. Q. Nyrud, K. M. A. Heltorp, Anders Roos, Francisco X. Aguilar, Katja Lähtinen, Noora Viholainen, Sami Berghäll, Anne Toppinen, B. J. Thorsen, Matleena Kniivilä, Antti Haapala, Elias Hurmekoski, T. Hujala, H. F. Hoen
This study examined public attitudes towards multi-storey wood buildings (MSWBs) in seven European countries. A questionnaire was distributed to online panellists in Austria, Denmark, Finland, Germ...
-
Mapping Finland’s regional forest bioeconomy plans Scand. J. For. Res. (IF 1.8) Pub Date : 2023-12-21 Fredric Mosley, Jo Van Brusselen
As a key part of the national policy agenda, Finland aims to operationalize forest-based bioeconomy. The coordination and implementation of changes are often carried out at the regional level. Yet,...
-
Harmonized decay classification for dead wood in Nordic national forest inventories Scand. J. For. Res. (IF 1.8) Pub Date : 2023-12-21 Tuomas Aakala, Juha Heikkinen
Dead wood quality is typically recorded as a biodiversity indicator and as part of forest carbon estimates, using decay classification systems. In large-scale national forest inventories (NFIs), th...
-
Phytosanitary assessment of black and grey alder stands in Latvia Scand. J. For. Res. (IF 1.8) Pub Date : 2023-12-05 Dārta Kļaviņa, Zane Striķe, Laima Ciseļonoka, Jānis Lekavičs, Natālija Burņeviča, Kristīne Pāruma, Dace Saulīte-Berene, Edgars Rudāns, Tālis Gaitnieks
Black alder Alnus glutinosa (L.) Gaertn. and grey alder Alnus incana (L.) Moench, cover up to 11% of the forest area in Latvia. As alder dieback caused mainly by Phytophthora has been reported in s...
-
Current state of mixed forests available for wood supply in Finland and Sweden Scand. J. For. Res. (IF 1.8) Pub Date : 2023-11-29 Daesung Lee, Emma Holmström, Jari Hynynen, Urban Nilsson, Kari T. Korhonen, Bertil Westerlund, Simone Bianchi, Jorge Aldea, Saija Huuskonen
This study’s objectives were to suggest harmonised criteria for the definition of mixed forests for two Nordic countries, describe their principal mixture types, and provide an overview of their cu...
-
Biomass allocation and equations for silver birch (Betula pendula) and downy birch (Betula pubescens) in Estonia Scand. J. For. Res. (IF 1.8) Pub Date : 2023-11-29 Mikko Buht, Allar Padari, Jürgen Aosaar, Mats Varik, Kristiina Aun, Marek Uri, Hardo Becker, Mai Kukumägi, Agnes Sepaste, Veiko Uri
The values of the fractional distribution of aboveground (AGB) and belowground biomass (BGB), root/shoot ratios (R/S) and stemwood density were estimated for silver (Betula pendula) and downy birch...
-
Modelling branch surface area of Picea abies [L.] Karst Scand. J. For. Res. (IF 1.8) Pub Date : 2023-11-29 Mathias Neumann, Thomas Ledermann
Allometric models based on limited sub-samples are widely used for predicting forest-scale information. Here, we develop allometric models for the branch surface area of the widespread conifer spec...
-
Neutral effect of nitrogen addition and negative effect of precipitation reduction on the soil faunal community in a temperate forest Scand. J. For. Res. (IF 1.8) Pub Date : 2023-11-29 Yajuan Xing, Honglin Wang, Guoyong Yan, Guancheng Liu, Binbin Huang, Yulei Fu, Qinggui Wang
Nitrogen deposition can promote belowground soil carbon pools, and precipitation reduction can eliminate this positive effect. Soil fauna play crucial roles in regulating the dynamics of organic ma...
-
Effects of long-term nitrogen addition on the fine root morphology and anatomy of four main shrub species in an old-growth forest Scand. J. For. Res. (IF 1.8) Pub Date : 2023-11-29 Guancheng Liu, Yajuan Xing, He Sun, Guoyong Yan, Xiaochun Wang, Qinggui Wang
Soil nitrogen (N) availability is critical to root function and morphological traits, which reflect strategies for nutrient uptake and survival of plants. However, these factors have rarely been st...
-
Economic losses caused by butt rot in Norway spruce trees in Norway Scand. J. For. Res. (IF 1.8) Pub Date : 2023-11-29 Lennart Noordermeer, Heikki Korpunen, Simon Berg, Terje Gobakken, Rasmus Astrup
Butt rot is a main defect in Norway spruce (Picea abies (L.) Karst.) trees and causes large economic losses for forest owners. However, little empirical research has been done on the effects of but...
-
The development of foliar fungal communities of nursery-grown Pinus sylvestris seedlings Scand. J. For. Res. (IF 1.8) Pub Date : 2023-11-29 Rebecca Larsson, Audrius Menkis, Oskar Skogström, Carin Espes, Eva-Karin Brogren-Mohlin, Martin Larsson, Åke Olson
In forest nurseries, foliar fungi play a key role in the health of tree seedlings. The aim of this study was to study the diversity and the development of foliar fungal species associated with nurs...
-
Nepal's community forestry: critical reflection from the governance perspective Scand. J. For. Res. (IF 1.8) Pub Date : 2023-11-29 Narayan Prasad Gautam, Prabin Bhusal, Nirmal Kumar Raut, Bir Bahadur Khanal Chhetri, Nirjala Raut, Muhammad Haroon U. Rashid, Pengfei Wu
In recent decades, the role of community forestry (CF) has been to address the livelihoods of local people beyond its original objective of forest protection. Yet, there have been governance-relate...
-
How Białowieża Forest preserved its primevalness? The development of management and protection in the fourteenth−eighteenth centuries Scand. J. For. Res. (IF 1.8) Pub Date : 2023-09-04 Stanisław Zawadzki, Bogumiła Jędrzejewska
ABSTRACT The former royal forests of the Grand Duchy of Lithuania present a unique example of centuries-old protection. Based on archival documents and published literature, we analyzed the evolution of the management and protection system of Białowieża Forest in the fourteenth-eighteenth century. The timeframe of our analysis (1386-1795) covers the period of the union of the Kingdom of Poland and
-
“Profitability is sustainability:” framing of forest management practices by the Swedish forest industry Scand. J. For. Res. (IF 1.8) Pub Date : 2023-09-02 Petter Heder Brandt, Anders Olsson, Karl Dahlquist, Tuba Inal
This article investigates how the Swedish forest industry, as represented by the three largest Swedish private forest companies (Svenska Cellulosa AB, Stora Enso, and Holmen), through their main pu...
-
Change in Carpinus betulus flowering in the Czech Republic Scand. J. For. Res. (IF 1.8) Pub Date : 2023-08-08 Lenka Hájková, Martin Možný, Veronika Oušková, Zdeněk Žalud
Common hornbeam (Carpinus betulus) is one of the most important spring pollen allergens widespread in the Czech Republic. This study evaluates the changes in Carpinus betulus flowering and the leng...
-
Taper, volume, and bark thickness models for spruce, pine, and birch in Norway Scand. J. For. Res. (IF 1.8) Pub Date : 2023-08-08 Endre Hansen, Johannes Rahlf, Rasmus Astrup, Terje Gobakken
ABSTRACT Taper models, which describe the shape of tree stems, are central to estimating stem volume. Literature provides both taper- and volume models for the three main species in Norway, Norway spruce, Scots pine, and birch. These models, however, were mainly developed using approaches established over 50 years ago, and without consistency between taper and volume. We tested eleven equations for
-
Forest ownership objectives and their connection with forestry activities: a confirmatory approach to studying gender differences Scand. J. For. Res. (IF 1.8) Pub Date : 2023-07-18 Juulia Kuhlman, Sami Berghäll, Annukka Vainio
ABSTRACT Research suggests that gender is an important factor explaining the differences of forest owners. Nonetheless, little research has focused on gender. Results from a questionnaire (n = 6558) conducted in Finland are utilised to study the gender, forest owner objectives and their connection with forest owner activity. This paper aims to validate a five-dimensional forest ownership objective
-
Occupancy rates of excavated cavities and nest boxes in managed boreal forest in relation to forest structure Scand. J. For. Res. (IF 1.8) Pub Date : 2023-07-13 Jan Hanzelka, Daniele Baroni, Toni Laaksonen
ABSTRACT Cavity nesting birds depend on the availability of tree cavities for breeding, but the structure of the surrounding environment may also impact cavity occupancy. Here we investigated the effects of forest structure on occupancy rates of excavated cavities and similar-size nest boxes by cavity nesters in managed southern boreal forests in Finland. We recorded the occupancy over five breeding
-
Analysis of forest tree dieback using UltraCam and UAV imagery Scand. J. For. Res. (IF 1.8) Pub Date : 2023-07-07 Mohammad Hassan Naseri, Shaban Shataee Jouibary, Hashem Habashi
ABSTRACT In recent years, increasing tree diebacks and mortality in some forests, particularly in forest parks, created a need amongst forest managers to find effective methods to gather information about the rate of dieback and mortality and their reasons. High-quality air and space-born remote sensing data has established as an alternative to field surveys for certain inventory tasks. This study
-
Comparing stand growth models in optimizing mixed-species forest management Scand. J. For. Res. (IF 1.8) Pub Date : 2023-07-04 Nico Österberg, Vesa-Pekka Parkatti, Olli Tahvonen
ABSTRACT We study the effect of forest stand growth models on the economically optimal management of boreal mixed-species forests. Our size-structured economic–ecological model includes the optimization of harvest timing, harvesting intensities, rotation periods, and the choice between rotation forestry and continuous cover forestry. We carry out a systemic comparison of economically optimal solutions
-
EU wood production vs. biodiversity goals – possible reconciliation in Finland? Scand. J. For. Res. (IF 1.8) Pub Date : 2023-07-03 Minna Räty, Artti Juutinen, Kari T. Korhonen, Kimmo Syrjänen, Leena Kärkkäinen
ABSTRACT According to protection targets of EU Biodiversity Strategy 2030, 30% of EU’s land and sea area should be legally protected by 2030. While the actual targets and even terms are still to be defined, the strategy’s possible impacts can be simulated for policy support purposes. The strategy aims to increase protection by setting aside forests and extending closer-to-nature forest management practices
-
Walnut in Sweden: effects of nurse trees, weed control and fertilization on five-year survival and growth of planted Juglans × intermedia NG23 and NG38 Scand. J. For. Res. (IF 1.8) Pub Date : 2023-06-27 Jens Peter Skovsgaard, Ulf Johansson, Jan-Eric Englund, Stefan Juravle
ABSTRACT This study quantified the effects of different establishment practices on survival, dieback and early growth of Juglans × intermedia NG23 and NG38 planted in a statistically designed field experiment on glacial till in southern Sweden. Establishment practices included the use or absence of nurse trees (Populus maximowiczii × trichocarpa var. OP42 planted one year before J. × intermedia), weed
-
A user-driven, reduced whole-stand growth model for major hybrid poplar clones in Spain Scand. J. For. Res. (IF 1.8) Pub Date : 2023-06-27 Fernando Castedo-Dorado, Pablo Rodríguez-Gonzálvez, Eduardo González-Ferreiro, Guillermo Ramos-González, Ramón Álvarez-Esteban, Flor Álvarez-Taboada
ABSTRACT Populus spp. clones and hybrids are commonly cultivated for timber production worldwide due to their fast growth and adaptability. In Spain, growth models are currently available for the Populus × euramericana clones ‘I-214' and ‘MC'. However, the input variables required for these models are not typically available to potential users. For the most widely used P. × interamericana clones ('Beaupre'
-
The potential to develop environmental values on privately owned forest land in southern Sweden Scand. J. For. Res. (IF 1.8) Pub Date : 2023-06-19 Erika Olofsson, Rikard Jakobsson
ABSTRACT Private forest owners’ management decisions significantly impact the development of forest values in Sweden. This study explored the potential to develop environmental values on privately owned land in southern Sweden. Data were collected through interviews with 23 forest owners and analyzed with semantic content analysis. The interviewees owned estates of productive, predominantly coniferous
-
Students’ perception of bioeconomy as an important factor in communicating and further development of the bioeconomy in Slovakia and the Czech Republic Scand. J. For. Res. (IF 1.8) Pub Date : 2023-06-06 Lenka Marcineková (nee Navrátilová), Petra Palátová, Jozef Výbošťok, Vilém Jarský, Marcel Riedl, Blanka Giertliová, Roman Dudík, Jaroslav Šálka
ABSTRACT This study focuses on the issues of bioeconomy perception of students at forestry faculties in Slovakia and the Czech Republic. Bioeconomy is seen as a great window of opportunities, hence there is increased demand for bioeconomy education. This paper can help answer this demand and improve the curricula of universities providing bioeconomy-related education. The survey was conducted at the
-
CO2 and CH4 fluxes from forest soil in the northern Da Xing’anling Mountains in Northeast China during the freezing and thawing periods of near-surface soil in 2018–2019 Scand. J. For. Res. (IF 1.8) Pub Date : 2023-06-04 Lin Yang, Qiuliang Zhang, Huijun Jin, Zhongtao Ma, Xiaoying Jin, Sergey S. Marchenko, Ruixia He, Valentin V. Spektor, Xiaoli Chang
ABSTRACT Under a warming climate, the studies on effects of seasonal freeze–thaw cycles on soil respiration are key to understanding the soil carbon cycles and ecosystem responses and resilience at mid- and high latitudes. In this study, the effluxes of soil surface CO2 and absorption rates of CH4 were measured in the Xing'an larch (Larix gmelinii) forest in the northern Da Xing’anling Mountains, Northeast
-
Growth rate and economic evaluation of mixed stands established with Cedrus libani and Pinus nigra Scand. J. For. Res. (IF 1.8) Pub Date : 2023-06-02 Neşat Erkan, Edanur Ayhan
ABSTRACT This study aimed to (1) investigate the long-term results of Cedrus libani + Pinus nigra mixed afforestation and (2) compare it with pure P. nigra afforestation in terms of wood production, economic return, and carbon (C) sequestration. The study was conducted in Elazığ-Sivrice, southeastern Turkey. Data were collected from six sample plots, and stem analysis for each species in the mixed
-
Comparison of four alternative survey methods in assessing dead wood at the stand level Scand. J. For. Res. (IF 1.8) Pub Date : 2023-05-30 Juha Siitonen, Hannes Pasanen, Matti Ylänne, Lauri Saaristo
ABSTRACT Many forestry practitioners need information on the amount of dead wood for various purposes, often at the level of individual stands. Our aim was to compare four simple dead-wood inventory methods of which systematic circular plot inventory is a well-known method, while relascope plot inventory (using the ordinary horizontal angle relascope also for downed trees), diameter class counting
-
Incorporated neighborhood and environmental effects to model individual-tree height using random forest regression Scand. J. For. Res. (IF 1.8) Pub Date : 2023-05-26 Jiali Nie, Shuai Liu
ABSTRACT In forest resource inventory, tree height is often estimated by easily measurable diameter from height-diameter model. In this study, we tried to use random forest (RF), an important machine learning method, to model individual-tree height. Results showed that the optimized RF model had better fitting and prediction accuracy (R2 = 0.8146 and RMSE = 2.2527 m). In terms of relative importance
-
Long-term nitrogen addition and drought altered root trait and plant biomass allocation of five herbs in early spring in a temperate forest Scand. J. For. Res. (IF 1.8) Pub Date : 2023-05-24 Qinggui Wang, Guancheng Liu, Peng Qu, Guoyong Yan, Yajuan Xing
ABSTRACT In early spring, because the tree and shrub layers are still dormant, the absorption of nutrients by herbs is the key factor to maintain nutrients in temperate forest ecosystems, but it is not clear whether climate change will change the nutrient uptake strategy of herbs. Therefore, we measured the biomass, fine root morphology, and stoichiometry of five dominant herbs in response to environmental
-
Forest owner or shareholder? Ownership feelings in a jointly-owned forest Scand. J. For. Res. (IF 1.8) Pub Date : 2023-05-24 Merja Lähdesmäki, Anne Matilainen, Pekka Lehto
ABSTRACT Parcelisation-induced fragmentation is a common development trend in forest ownership in many Western countries. In Finland, the idea of a jointly-owned forest (JOF) has been introduced to facilitate the effective management of forest resource in parcelised and fragmented forest owning contexts. A JOF is an area of combined holdings intended for the practice of sustainable forestry for the
-
Detecting the presence of standing dead trees using airborne laser scanning and optical data Scand. J. For. Res. (IF 1.8) Pub Date : 2023-05-13 Marie-Claude Jutras-Perreault, Erik Næsset, Terje Gobakken, Hans Ole Ørka
ABSTRACT Deadwood is an important indicator of biodiversity in forest ecosystems. Identifying areas with large density of standing dead trees through field inventory is challenging, and remotely sensed data can provide a more systematic approach. In this study, we used metrics derived from airborne laser scanning (ALS) data (7.1 points m−2) and vegetation indices from optical images (HySpex sensor
-
Altitudinal effect on Crimean pine (Pinus nigra J.F. Arnold subsp. pallasiana (Lamb.) Holmboe) sapling morphology in north-western Türkiye Scand. J. For. Res. (IF 1.8) Pub Date : 2023-05-10 Nagihan Seki
ABSTRACT Sapling morphological characters are one of the important tools for assessing the adaptive potential of a tree species to a changing environment, and so to climate change. In the study, the morphological characters of stems and needles of Crimean pine (Pinus nigra J.F. Arnold subsp. pallasiana (Lamb.) Holmboe) saplings growing in different altitudes were examined to assess the altitudinal
-
Root frost tolerance, seasonal variation in root growth, and field performance of one-year-old Russian larch seedlings with simulated root freezing damages Scand. J. For. Res. (IF 1.8) Pub Date : 2023-05-08 Rakel J. Jonsdottir, Inger Sundheim Fløistad
ABSTRACT Planting healthy seedlings with optimal growth potential is essential for proper growth and survival in forest regeneration. Assessing the seedling quality prior to planting is therefore important. In this Icelandic study, effects of root damage induced with artificial freezing in young Russian larch seedlings were examined using the root growth capacity method (RGC). Frost tolerance of roots
-
Cost-efficient forest management for safeguarding Siberian flying squirrel (Pteromys volans) habitats in Central Finland Scand. J. For. Res. (IF 1.8) Pub Date : 2023-05-04 Anssi Ahtikoski, Ari Nikula, Vesa Nivala, Soili Haikarainen, Artti Juutinen
ABSTRACT Protection of vulnerable species often creates conflicts between land use and conservation management. Particularly challenging is the case of Siberian flying squirrel (SFS; Pteromys volans). SFS favours mature forest habitats, which are often the target for logging, and therefore its protection causes opportunity costs. In our analysis a regional case study was applied as a platform to create
-
State of forest research in 2010s – a bibliographic study with special reference to Finland, Sweden and Austria Scand. J. For. Res. (IF 1.8) Pub Date : 2023-04-11 Risto Päivinen, Gillian Petrokofsky, William J. Harvey, Leo Petrokofsky, Pasi Puttonen, Jyrki Kangas, Eero Mikkola, Leena Byholm, Liisa Käär
ABSTRACT Using bibliometric methods, this report analysed the volumes of global forest research and research collaboration between researchers, institutes and countries during the period 2010–2019. The keywords used in the bibliometric search resulted in a good match with the publication lists of three major Finnish forest research organisations. The final corpus of “forest” publications consisted
-
Checking the balance between pathogenic and mutualistic pine needle fungi of the genus Lophodermium in forested and urban areas of Slovakia Scand. J. For. Res. (IF 1.8) Pub Date : 2023-03-24 Emília Ondrušková, Slavomír Adamčík, Marek Kobza, Zuzana Jánošíková, Radovan Ostrovský, Katarína Pastirčáková, Miroslav Caboň, Katarína Adamčíková
ABSTRACT Lophodermium species are well known to be among the dominant endophytic fungi colonizing pine needles. The occurrence of two species with different life strategies on different Pinus trees across Slovakia was detected by PCR using species-specific primers. In general, the commensalistic species L. pinastri was more frequent than parasitic L. seditiosum. There were no significant differences
-
Predicting stem taper using artificial neural network and regression models for Scots pine (Pinus sylvestris L.) in northwestern Türkiye Scand. J. For. Res. (IF 1.8) Pub Date : 2023-03-22 Mehmet Seki
ABSTRACT Stem taper models are helpful tools for predicting diameter of a tree at any height or volume of any stem section. In this study, traditional and artificial neural network (ANN) approaches were used to predict stem tapers of Scots pine individuals. The data used in this study correspond to destructively sampled trees in even-aged forest stands located in the three important locations where
-
How susceptible is Sudetan larch to larch canker Lachnellula willkommii (R. Hartig) Dennis? Consequences for breeding and deployment Scand. J. For. Res. (IF 1.8) Pub Date : 2023-03-22 Luc E. Pâques, V. Benoit, C. Buret, C. Ridel, T. Servouse, G. Sylvestre-Guinot
ABSTRACT Historical results from provenance trials tended to position Sudetan larch (Larix decidua Mill. sudetica) populations among the least susceptible to larch canker (Lachnellula willkommi (R.Hartig) Dennis), in sharp contrast to Alpine populations. However, a recent large-scale outbreak of larch canker in artificial French stands planted with Sudetan larch brings into question this conclusion
-
Wildfire and prescribed burning impact moose forage availability and browsing levels in the northern boreal forest Scand. J. For. Res. (IF 1.8) Pub Date : 2023-03-10 Emelie Fredriksson, Märtha Wallgren, Therese Löfroth
ABSTRACT Fire regimes and herbivore densities have in parts of the boreal been heavily impacted by human activities with consequences for vegetation, forage supply and ungulate use. In this study, we evaluate the effects of natural wildfires and prescribed burning on moose forage availability, use, and browsing in northern Sweden. We studied three wildfire locations, adjacent controls, and five prescribed
-
Accuracy assessment of the nationwide forest attribute map of Norway constructed by using airborne laser scanning data and field data from the national forest inventory Scand. J. For. Res. (IF 1.8) Pub Date : 2023-03-06 Ana de Lera Garrido, Terje Gobakken, Marius Hauglin, Erik Næsset, Ole Martin Bollandsås
ABSTRACT The aim of this study was to analyze the accuracy of predictions of dominant height, mean height, basal area, and volume from the nationwide forest attribute map (SR16). The analysis took advantage of field observations from 33 different forest inventory projects across Norway used for validation. Forest attributes for more than 5000 plots were predicted using non-stratified and stratified
-
Conditioning of Scots pine (Pinus sylvestris L.) sowing material Scand. J. For. Res. (IF 1.8) Pub Date : 2023-02-24 Hanna Szajsner, Przemysław Bąbelewski, Anna Koszelnik-Leszek, Magdalena Kuryś
ABSTRACT Scots pine is the main forest forming species in Poland. Despite the great importance of natural reconditioning of forest trees, a substantial source of reforestation is the nursery production of seedling material. Pre-sowing seed conditioning, consisting of chemical and physical treatments, is commonly used to improve seed quality as well as to advance uniform development and increase plant
-
Productivity and cost assessment of two harvesting methods for medium-rotation poplar plantations Scand. J. For. Res. (IF 1.8) Pub Date : 2023-02-13 Raffaele Spinelli, Natascia Magagnotti, Barnabas Kovacs, Patrik Heger, Matevz Mihelic
ABSTRACT The study compared the cut-to-length (CTL) and the whole-tree-harvesting (WTH) methods under two alternative log length specifications (2 m vs. 4 m) as deployed in the new medium-rotation poplar plantations. The goal of this study was to determine if any of the four combinations of harvesting method and log length incurred lower cost and/or better log yield than the others. The test was conducted
-
Country-wide analysis of the potential use of harwarders for final fellings in Sweden Scand. J. For. Res. (IF 1.8) Pub Date : 2023-01-27 Rikard Jonsson, Mikael Rönnqvist, Patrik Flisberg, Petrus Jönsson, Ola Lindroos
ABSTRACT There is a need to decrease the costs of cut-to-length operations. The harwarder, a one-machine system with the potential to reduce the costs, has been compared to the two-machine system (TMS) at the stand and regional levels but not at the national level, which is important as basis for decision to implement. The objective was therefore to analyze its potential on a large scale in Swedish
-
Estimation of tree height with machine learning techniques in coppice-originated pure sessile oak (Quercus petraea (Matt.) Liebl.) stands Scand. J. For. Res. (IF 1.8) Pub Date : 2023-01-23 Abbas Sahin, Gafura Aylak Ozdemir, Okan Oral, Batin Latif Aylak, Murat Ince, Emrah Ozdemir
ABSTRACT In this study, in order to estimate total tree height, three different model structures with different input variables were produced through the use of 872 tree data points obtained from different development stages and sites in coppice-originated pure sessile oak (Quercus petraea [Matt.] Liebl.) stands. These models were fitted with machine learning techniques such as artificial neural networks
-
Beliefs on environmental impact of wood construction Scand. J. For. Res. (IF 1.8) Pub Date : 2023-01-23 Anders Roos, Elias Hurmekoski, Liina Häyrinen, Jaakko Jussila, Katja Lähtinen, Cecilia Mark-Herbert, Emil Nagy, Ritva Toivonen, Anne Toppinen
ABSTRACT People have different beliefs about the environmental impact of forest products. This quantitative web-survey study investigated public beliefs in Finland and Sweden about the environmental and climate impacts of using wood as a construction material for multi-story buildings. It was conducted with consumer panels reflecting the average populations of the two countries. The study analyzed
-
Recovery dynamics of ecosystem carbon budgets in a young silver birch stand chronosequence after clear-cut – Estonian case study Scand. J. For. Res. (IF 1.8) Pub Date : 2022-12-10 K. Aun, M. Kukumägi, M. Varik, M. Uri, M. Buht, J. Aosaar, A. Padari, A. Sepaste, K. Soosaar, H. Becker, V. Uri
ABSTRACT Clear-cutting is an extensively used silvicultural method in the Nordic and Baltic countries, which strongly influences the site’s carbon (C) budget. In the current study, C budgets for a young silver birch stand chronosequence (2–8-year-old) were compiled using the C budgeting method. High variability of annual NEP between stands of similar ages occurred, as the C accumulation ability of
-
Carbon and oxygen dual-isotopes in tree rings indicate alternative physiological responses opted by European beech trees to survive drought stress Scand. J. For. Res. (IF 1.8) Pub Date : 2022-12-08 Tamalika Chakraborty, Albert Reif, Andreas Matzarakis, Gerhard Helle, Fabian Faßnacht, Somidh Saha
ABSTRACT Poor drought tolerance of European beech trees raised concerns in Europe. We hypothesized that beech could show an opposite physiological response to the same level of climatic drought with change in edaphic drought. We performed a combined analysis of δ13C and δ18O in tree rings to reveal retrospective temporal physiological responses of trees to drought. The edaphic drought was assessed
-
Forest roads damage detection based on deep learning algorithms Scand. J. For. Res. (IF 1.8) Pub Date : 2022-12-05 Mohammad Javad Heidari, Akbar Najafi, Jose G. Borges
ABSTRACT Currently, forest road monitoring reached a critical stage and need requires low-cost or cost-effective monitoring. Today, smartphones have been used on public roads to identify road deterioration due to benefits such as usability, cost, ease of access, and expected accuracy. The use of smartphones in forest road development by the proposed system is a distributed information system that converts
-
Effects of site preparation and reindeer grazing on the early-stage success of Scots pine regeneration from seeds in northern Finland and Sweden Scand. J. For. Res. (IF 1.8) Pub Date : 2022-10-31 Janne Miettinen, Ville Hallikainen, Mikko Hyppönen, Urban Bergsten, Hans Winsa, Pekka Välikangas, Arto Hiltunen, Pasi Aatsinki, Pasi Rautio
ABSTRACT The importance of sufficient soil scarification to ensure the regeneration of Scots pine on sub-dry and more fertile sites has been emphasized in many studies. Here we aimed to study, how site preparation intensity affects the early success of natural regeneration and sowing (bare seeds and seed pellets) of Scots pine with or without the reindeer grazing. The study area was located in northern