Article
Forestry
Saija Huuskonen, Tuulia Lahtinen, Jari Miina, Karri Uotila, Simone Bianchi, Pentti Niemisto
Summary: Mixed-species forests in Fennoscandia are gaining attention for their potential to enhance resilience, biodiversity, and productivity. This study aimed to investigate the growth dynamics of spruce-birch stands in managed forests with artificial regeneration. The findings showed that spruces were not suppressed by birches and were able to coexist in the same canopy layer. The fast growth of planted spruces suggests that maintaining the birch mixture should start in the early stage of stand management. These findings contribute to the establishment and management of mixed-species forests, improving biodiversity in boreal, planted spruce forests.
Article
Forestry
Maria Sameiro Patricio, Cremildo R. G. Dias, Luis Nunes
Summary: Height is a key variable in forest management, but measuring it is difficult. The use of mixed-effects modeling can improve accuracy in height-diameter (h-d) models by considering stand-level variables.
FOREST ECOLOGY AND MANAGEMENT
(2022)
Article
Plant Sciences
Fang K. Du, Min Qi, Yuan-Ye Zhang, Remy J. Petit
Summary: The study compared leaf traits in allopatric and sympatric populations of two East Asian deciduous oaks and found greater genetic divergence and resource-conservative traits in the later colonizing species growing in mixed stands. These results suggest that asymmetric trait divergence can occur where species coexist.
Article
Forestry
Eric Andreas Thurm, Hans Pretzsch
Summary: Forest management controls wood growth through regulating stand density. Studies have shown that mixed stands have different growth-density relationships compared to pure stands, with some mixed stands exceeding the 100% benchmark in growth. The growth-density response resembles a cubic function, with an optimal growth level in the medium to high density phase. Management practices in mixed stands need to be adjusted to optimize growth.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Agronomy
Thomas Perot, Philippe Balandier, Camille Couteau, Nicolas Delpierre, Frederic Jean, Sandrine Perret, Nathalie Korboulewsky
Summary: Climate change affects temperate tree species phenology, particularly the timing of budburst driven by air temperature. Study shows that the leaf persistence of Scots pine in mixed stands delays the budburst date of sessile oak. This could have implications for sessile oak management and frost damage risk mitigation in the context of global warming.
AGRICULTURAL AND FOREST METEOROLOGY
(2021)
Article
Forestry
Sonia Condes, Miren del Rio, David I. Forrester, Admir Avdagic, Kamil Bielak, Andrej Bonc, Michal Bosela, Torben Hilmers, Aida Ibrahimspahic, Staniski Drozdowski, Andrzej Jaworski, Thomas A. Nagel, Zuzana Sitkova, Jerzy Skrzyszewski, Roberto Tognetti, Giustino Tonon, Tzvetan Zlatanov, Hans Pretzsch
Summary: This study found that annual mean temperature is an important climatic driver of species dynamics in spruce-fir-beech mixed mountain forests, with stand basal area growth favored by higher temperatures, particularly due to positive responses of silver fir compared to European beech.
FOREST ECOLOGY AND MANAGEMENT
(2022)
Article
Forestry
Avram Cicsa, Gheorghe-Marian Tudoran, Maria Cicsa (Boroeanu), Alexandru-Claudiu Dobre, Gheorghe Sparchez
Summary: This study highlights the competitive and supportive relationships between trees in mixed stands, demonstrating the impact on growth and yield. Low species composition proportions in mixed stands enhance tree height growth, while higher proportions lead to increased productivity. Management of mixed forests should consider site characteristics, species ecological requirements, and yield potential.
Article
Entomology
Emigdio Jordan Munoz-Adalia, Jaher Ahmed, Carlos Colinas
Summary: This study investigated the summer flight phenology of the oak pinhole borer in northeastern Spain, and found that population peaks occurred from late May to mid-August. The results suggest that the population dynamics of this pest are influenced by date and climatic factors.
JOURNAL OF APPLIED ENTOMOLOGY
(2022)
Article
Forestry
Andreas Rais, Andriy Kovryga, Hans Pretzsch, Jan-Willem G. van de Kuilen
Summary: The conversion to climate-stable, resilient and productive forests has resulted in an increasing share of mixed stands. This study quantified the variation in strength of European beech timber from stands of different composition and showed the impact of grading on the characteristic strength value of timber coming from those stands. The results highlight the importance of considering the various growth situations in forests when sampling material for strength grading.
WOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Forestry
Giulia Silvia Giberti, Camilla Wellstein, Alessio Giovannelli, Kamil Bielak, Enno Uhl, William Aguirre-Raquira, Francesco Giammarchi, Giustino Tonon
Summary: Understanding the carbon sequestration ability of trees under different climatic conditions is crucial for predicting the role of forests in mitigating global warming. This study focused on the carbon sequestration ability of Pinus sylvestris in pure and mixed forests in Central Poland. A new index called BAIden, which combines Basal Area Increment and mean ring wood density, was used to assess tree carbon sequestration ability. The results showed that the sensitivity of Pinus sylvestris to climatic variability varied depending on tree admixture, while Basal Area Increment and wood density had minimal differences between pure and mixed forests. Carbon accumulation in Pinus sylvestris was similarly sensitive to climatic variability in both forest types according to the BAIden index.
Article
Forestry
M. Bouwman, D. I. Forrester, J. den Ouden, G. -J. Nabuurs, G. M. J. Mohren
Summary: Mixed-species forests have the potential to mitigate risks associated with climate change, but predicting their growth dynamics is difficult due to varying species interactions under different conditions. Research in the Netherlands showed that the 3-PG(mix) model performed well in analyzing mixing effects of Scots pine and oak mixtures under climate change, with increased competitiveness of Scots pine on resource-limited soils.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Forestry
Rasmus Mohr Mortensen, Michelle Fyrstelin Fuller, Lars Dalby, Thomas Bjorneboe Berg, Peter Sunde
Summary: The research studied habitat selection of hazel dormouse in intensively managed woodlands in Denmark. The study found that the species strongly selected sites with high abundance-weighted species richness and high vegetation density of woody plants, and had specific habitat requirements related to food and safety. The results provide relatively simple means for accommodating the habitat needs of hazel dormouse in managed forests.
FOREST ECOLOGY AND MANAGEMENT
(2022)
Article
Forestry
Charlotta Hakansson, Per-Ola Hedwall, Monika Stromgren, Magnus Axelsson, Johan Bergh
Summary: The study investigated the effects of forest N fertilization on soil CH4 and N2O fluxes in young spruce stands in Sweden. Results showed that fertilization can influence the flux of these greenhouse gases, but using commercial NP or NPK fertilizers equivalent to 150 kg ha(-1) of N did not significantly alter the fluxes.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Forestry
Mahadev Sharma
Summary: This study developed site index models for black spruce and trembling aspen trees growing in mixed stands and evaluated the effects of climate change on site productivity. The results showed that climate effects were more pronounced for trembling aspen than black spruce in the far west.
Article
Environmental Sciences
Loredana Oreti, Diego Giuliarelli, Antonio Tomao, Anna Barbati
Summary: The study evaluates the potential of Object-Based Image Analysis (OBIA) and Very-High-Resolution imagery (VHR) to detect and map mixed forests of broadleaves and coniferous trees. The findings demonstrate that very high resolution images can be reliably used to detect the fine-grained pattern of rare mixed forests, supporting the monitoring and management of forest resources on fine spatial scales.
Article
Forestry
Saija Huuskonen, Timo Domisch, Leena Finer, Jarkko Hantula, Jari Hynynen, Juho Matala, Jari Miina, Seppo Neuvonen, Seppo Nevalainen, Pentti Niemisto, Ari Nikula, Tuula Piri, Juha Siitonen, Aino Smolander, Tiina Tonteri, Karri Uotila, Heli Viiri
Summary: Mixed forests in Fennoscandia appear to provide higher levels of ecosystem goods and services compared to monocultures, including increased biodiversity, improved risk management, and multiple-use values. However, browsing by cervids poses a significant challenge, requiring further research on silvicultural practices suited for mixed boreal forests.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Forestry
Soili Haikarainen, Saija Huuskonen, Anssi Ahtikoski, Mika Lehtonen, Hannu Salminen, Jouni Siipilehto, Kari T. Korhonen, Jari Hynynen, Johanna Routa
Summary: The study analyzed the regional effects of juvenile stand management on wood production and profitability of forest management, finding that timely management was the most profitable option. Delaying or neglecting management led to significant losses, especially on fertile sites with high growth rates. Therefore, timely management should be prioritized on fertile sites.
Article
Ecology
Ninni Saarinen, Kim Calders, Ville Kankare, Tuomas Yrttimaa, Samuli Junttila, Ville Luoma, Saija Huuskonen, Jari Hynynen, Hans Verbeeck
Summary: This study utilized 3D information to assess the impact of forest management on the structural complexity of individual Scots pine trees, finding that thinning increased structural complexity. The study also identified a relationship between structural complexity and tree attributes.
ECOLOGY AND EVOLUTION
(2021)
Correction
Forestry
Simone Bianchi, Saija Huuskonen, Jouni Siipilehto, Jari Hynynen
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Forestry
Harri Makinen, Helena M. Henttonen, Ulrich Kohnle, Christian Kuehne, Pekka Nojd, Chaofang Yue, Joachim Kladtke, Jouni Siipilehto
Summary: The study found that the self-thinning lines of Norway spruce and Scots pine have shifted upwards over time in South Germany, Norway, and Finland. Currently, the stands can sustain higher densities than in the past, and the increase in maximum density for a given average stem size is more pronounced for pine.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Forestry
Simone Bianchi, Saija Huuskonen, Jari Hynynen, Jouni Siipilehto, Pentti Niemisto
Summary: This study investigated tree-level dynamics in spruce- and pine-dominated stands after intermediate commercial thinning of different type and intensity. The results showed that extreme thinning increased individual tree basal area growth and decreased stem slenderness for both species. There were only small differences across thinning types, suggesting that crown thinning is a viable alternative to the widely-used low thinning in Fennoscandia.
SCANDINAVIAN JOURNAL OF FOREST RESEARCH
(2022)
Article
Forestry
Saija Huuskonen, Tuulia Lahtinen, Jari Miina, Karri Uotila, Simone Bianchi, Pentti Niemisto
Summary: Mixed-species forests in Fennoscandia are gaining attention for their potential to enhance resilience, biodiversity, and productivity. This study aimed to investigate the growth dynamics of spruce-birch stands in managed forests with artificial regeneration. The findings showed that spruces were not suppressed by birches and were able to coexist in the same canopy layer. The fast growth of planted spruces suggests that maintaining the birch mixture should start in the early stage of stand management. These findings contribute to the establishment and management of mixed-species forests, improving biodiversity in boreal, planted spruce forests.
Article
Forestry
Amanda Castro Segtowich, Saija Huuskonen, Nils Fahlvik, Emma Holmstrom
Summary: This study compared the effects of different thinning designs and strategies on Scots pine plantations in Sweden, including basal area, total and standing volumes, and periodic annual increment. The results showed that there were no significant differences in standing and total volumes among treatments in the short or long term. Although using distance-dependent competition indices improved the growth model slightly, distance-independent models were just as effective in predicting diameter growth. Schematic thinning could be a viable option for a first commercial thinning or one-time thinning if, at least, one more thinning is included in the management plan, or if the motivating interest is mainly volume.
Article
Forestry
Timo Saksa, Jari Miina, Olli Luukkonen
Summary: Uprooting is an effective mechanical pre-commercial thinning operation that removes competitive, undesirable trees to reduce the need for subsequent thinning. The study found that the number of birches in uprooted spruce stands was influenced by site wetness, site fertility, and the thickness of the humus layer. Most stands had at least 1000 freely growing spruces, and the height and volume differences between spruces and birches were minimal, indicating the potential for a mixed spruce-birch stand.
Article
Forestry
Daesung Lee, Jouni Siipilehto, Jari Hynynen
Summary: The study introduces methods and models for predicting tree dimensions, diameter at breast height, and tree height for a hybrid aspen plantation using data from southern Finland, showing that parameter recovery method using DG and Naslund's models were applicable for predicting tree diameter and height.
Article
Forestry
Jouni Siipilehto, Harri Makinen, Kjell Andreassen, Mikko Peltoniemi
Summary: This study analyzed the impact of senescence on the survival probability of Norway spruce, finding that including stand age and its interaction with stem diameter in the model resulted in more plausible predictions. The results supported the hypothesis that stand age and tree senescence reduce the survival probability of trees, and that the ageing effect improves survival probability models for Norway spruce.
Article
Forestry
A. Q. Nyrud, K. M. A. Heltorp, Anders Roos, Francisco X. Aguilar, Katja Lahtinen, Noora Viholainen, Sami Berghall, Anne Toppinen, B. J. Thorsen, Matleena Kniivila, Antti Haapala, Elias Hurmekoski, T. Hujala, H. F. Hoen
Summary: This study investigated public attitudes towards multi-storey wood buildings in seven European countries and found that the level of knowledge about wood buildings was lower in countries where brick, stone, and concrete were commonly used in construction, such as the United Kingdom, Germany, and Denmark. Finland and Sweden had the most positive attitudes towards wood buildings. The study also identified factors such as fire vulnerability, material solidity, indoor environment, and moisture vulnerability that influenced people's perception of wood buildings as a nice place to live.
SCANDINAVIAN JOURNAL OF FOREST RESEARCH
(2024)
