Āris Jansons
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View article: Conservation values in set-aside black alder forests adjacent to managed stands: short-term changes
Conservation values in set-aside black alder forests adjacent to managed stands: short-term changes Open
Forests dominated by black alder (Alnus glutinosa) potentially support habitats with high biological diversity, including rare and endangered species with specific demands for the habitat. However, the knowledge on the response of set-asid…
View article: Variation in the Molecular Phenotype of <i>βglu‐1</i> , an Insect Defence‐Related Beta‐Glucosidase Gene, in Two Transcontinental <i>Picea</i> Species
Variation in the Molecular Phenotype of <i>βglu‐1</i> , an Insect Defence‐Related Beta‐Glucosidase Gene, in Two Transcontinental <i>Picea</i> Species Open
Forest trees face threats from many insect pest species, underscoring the importance of understanding their defence mechanisms for survival. In a North American conifer species, Picea glauca , gene expression of β glu‐1 produces phenolic c…
View article: The amount of undisturbed forest in proximity of severe disturbance patches enhances their recovery in temperate Europe
The amount of undisturbed forest in proximity of severe disturbance patches enhances their recovery in temperate Europe Open
Context Forest recovery following disturbances is essential for maintaining ecosystem services, especially after large-scale events where regeneration is limited by seed availability. Understanding how environmental and biotic factors infl…
View article: Links between species richness of bryophytes and lichens and tree-related microhabitats on retention trees
Links between species richness of bryophytes and lichens and tree-related microhabitats on retention trees Open
View article: Variation in the molecular phenotype of βglu1, an insect defense-related beta-glucosidase gene, in two transcontinental Picea species
Variation in the molecular phenotype of βglu1, an insect defense-related beta-glucosidase gene, in two transcontinental Picea species Open
View article: Effects of Drainage Maintenance on Tree Radial Increment in Hemiboreal Forests of Latvia
Effects of Drainage Maintenance on Tree Radial Increment in Hemiboreal Forests of Latvia Open
Under cool and moist climates, timely implementation of ditch network maintenance (DNM) is crucial for sustaining productivity of drained forests, thus reducing operational costs, while mitigating environmental risks. This underscores the …
View article: From progeny trial to stand projections: A modelling approach to genetic gains in silver birch
From progeny trial to stand projections: A modelling approach to genetic gains in silver birch Open
In the Baltic Sea region, silver birch (Betula pendula Roth) is a key species for plantation forestry, valued for its fast growth, adaptability, and economic importance, particularly in the region's strong plywood industry. This industry p…
View article: GROUND COVER VEGETATION DIVERSITY OF RIPARIAN FORESTS IN SALACA BASIN
GROUND COVER VEGETATION DIVERSITY OF RIPARIAN FORESTS IN SALACA BASIN Open
Riparian forests serve as ecotones, marking the transition between terrestrial and aquatic ecosystems and differing from the surrounding landscapes. Managing these forests has been identified as a means to enhance various ecological functi…
View article: LONG-TERM EFFECTS OF THINNING IN NATURAL PINE FORESTS UNDERGROWTH
LONG-TERM EFFECTS OF THINNING IN NATURAL PINE FORESTS UNDERGROWTH Open
Ground cover vegetation is crucial for biodiversity in northern conifer forests, providing habitat, food, and ecosystem functions like seedling regeneration and nutrient cycling. Their composition is shaped by tree species, canopy structur…
View article: Correction: Katrevičs et al. Forest Soil Fungal Diversity in Stands of Norway Spruce (Picea abies (L.) Karst.) of Different Ages. Forests 2025, 16, 500
Correction: Katrevičs et al. Forest Soil Fungal Diversity in Stands of Norway Spruce (Picea abies (L.) Karst.) of Different Ages. Forests 2025, 16, 500 Open
In the original publication [...]
View article: Meteorological sensitivity of tree-ring width of Scots pine and Norway spruce in drained stand
Meteorological sensitivity of tree-ring width of Scots pine and Norway spruce in drained stand Open
Tree growth in drained peatland forests is influenced by complex interactions between species specific traits and climatic variability, yet these relationships remain insufficiently understood. This study examined the sensitivity of Scots …
View article: Being Edgy: Ecotones of Ground Cover Vegetation in Managed Black Alder Habitats
Being Edgy: Ecotones of Ground Cover Vegetation in Managed Black Alder Habitats Open
Retention forestry creates anthropogenic ecotones that diversify forest landscapes in terms of age and biomass. Such diversification can have ambiguous ecological impacts, raising uncertainties, particularly for black alder swamp woodlands…
View article: Vegetation Species Diversity and Dominance After Large-Scale Clear-Cutting: Case Study from Latvia
Vegetation Species Diversity and Dominance After Large-Scale Clear-Cutting: Case Study from Latvia Open
Retention forestry is the dominant practice in Northern Europe, with large-scale clear-cuts following natural disturbances becoming more frequent as the climate changes. Despite its widespread use, clear-cutting is criticized for its poten…
View article: Trade-off between forest carbon sink in hemiboreal old-growth stands and wood-based solutions
Trade-off between forest carbon sink in hemiboreal old-growth stands and wood-based solutions Open
Forests in Europe have acted as an important carbon sink since the mid-20th century. However, in recent years, signs of sink saturation have emerged due to a decline in carbon uptake. As a result, land managers have to explore strategies t…
View article: Forest Soil Fungal Diversity in Stands of Norway Spruce (Picea abies (L.) Karst.) of Different Ages
Forest Soil Fungal Diversity in Stands of Norway Spruce (Picea abies (L.) Karst.) of Different Ages Open
Fungal communities can be used as indicators of various environmental processes in forest ecosystems. The diversity of these communities is linked to aboveground plants and soil properties. We assessed fungal diversity at four Norway spruc…
View article: Willingness of the Local Community to Support Management for the Improvement in the Quality of the Riparian Zone in North-Eastern Latvia
Willingness of the Local Community to Support Management for the Improvement in the Quality of the Riparian Zone in North-Eastern Latvia Open
The preservation and management of riparian zones in nature protection areas are challenging due to the simultaneous demands of nature protection regulations, active nature tourism burdens, and local community needs. The local community’s …
View article: Natural Regeneration, Genetic Diversity, and Provenance of Introduced Fagus sylvatica L. Stands in Latvia
Natural Regeneration, Genetic Diversity, and Provenance of Introduced Fagus sylvatica L. Stands in Latvia Open
European beech (Fagus sylvatica L.) has a wide distribution range through Central and Western Europe, and is tolerant to a range of environmental factors and shade. Due to the high wood quality and growth rate, there is increasing interest…
View article: Assessing Relationships Between Deer (Cervidae) Damage and Stand Structure of Scots Pine (Pinus sylvestris) Stands in Hemiboreal Latvia
Assessing Relationships Between Deer (Cervidae) Damage and Stand Structure of Scots Pine (Pinus sylvestris) Stands in Hemiboreal Latvia Open
Intensive forest management has promoted an increase in deer (Cervidae) population density. Various silvicultural activities, such as pre-commercial thinning, can change the feeding conditions for deer species, therefore impacting browsing…
View article: Patterns of short-term vegetation recovery after a fire in protected Scots pine forests of hemiboreal Latvia
Patterns of short-term vegetation recovery after a fire in protected Scots pine forests of hemiboreal Latvia Open
Wildfires as natural disturbances have had important impacts on terrestrial ecosystems, including forests. We studied patterns of short-term vegetation recovery after surface fire in protected hemiboreal Pinus sylvestris L.-dominated fores…
View article: Can triad forestry reconcile Europe’s biodiversity and forestry strategies? A critical evaluation of forest zoning
Can triad forestry reconcile Europe’s biodiversity and forestry strategies? A critical evaluation of forest zoning Open
View article: Natural Regeneration, Genetic Diversity and Provenance of Introduced<em> Fagus sylvatica</em> L. Stands in Latvia
Natural Regeneration, Genetic Diversity and Provenance of Introduced<em> Fagus sylvatica</em> L. Stands in Latvia Open
European beech (Fagus sylvatica L.) has a wide distribution range through Central and Western Europe, and is tolerant to a range of environmental factors and shade. Due to the wood quality and growth rate, there is increasing interest in t…
View article: Preliminary evidence of softwood shortage and hardwood availability in EU regions: A spatial analysis using the European Forest Industry Database
Preliminary evidence of softwood shortage and hardwood availability in EU regions: A spatial analysis using the European Forest Industry Database Open
View article: The Effects of the Selective Removal of Adjacent Trees on the Diversity of Oak-Hosted Epiphytes and Tree-Related Microhabitats
The Effects of the Selective Removal of Adjacent Trees on the Diversity of Oak-Hosted Epiphytes and Tree-Related Microhabitats Open
Restoration efforts to maintain oak-dominated habitats and enhance biodiversity often employ selective thinning, but its long-term effect on multiple taxa remains unclear. This study examines the effects of halo thinning around pedunculate…
View article: Trends in genetic diversity of silver birch: Insights from varied planting scenarios
Trends in genetic diversity of silver birch: Insights from varied planting scenarios Open
This study explores the impact of planting strategies on genetic diversity in silver birch (Betula pendula Roth) stands using simulation models. We examine the influence of different proportions of planted stands and the number of open-pol…
View article: Bite Me: Bark Stripping Showed Negligible Effect on Volume Growth of Norway Spruce in Latvia
Bite Me: Bark Stripping Showed Negligible Effect on Volume Growth of Norway Spruce in Latvia Open
Over the past few decades, increasing populations of cervid species in the Baltic region have reduced the quality and vitality of cultivated Norway spruce (Picea abies (L.) Karst.) stands. This study evaluated the effect of bark stripping …
View article: Can mixing Quercus robur and Quercus petraea with Pinus sylvestris compensate for productivity losses due to climate change?
Can mixing Quercus robur and Quercus petraea with Pinus sylvestris compensate for productivity losses due to climate change? Open
View article: Carbon carrying capacity in primary forests shows potential for mitigation achieving the European Green Deal 2030 target
Carbon carrying capacity in primary forests shows potential for mitigation achieving the European Green Deal 2030 target Open
Carbon accounting in the land sector requires a reference level from which to calculate past losses of carbon and potential for gains using a stock-based target. Carbon carrying capacity represented by the carbon stock in primary forests i…
View article: Organic soil greenhouse gas flux rates in hemiboreal old-growth Scots pine forests at different groundwater levels
Organic soil greenhouse gas flux rates in hemiboreal old-growth Scots pine forests at different groundwater levels Open
Tree biomass and soils (especially organic soils) are significant carbon pools in forest ecosystems, therefore forest management practices, in order to ensure carbon storage in these pools and to mitigate climate change, are essential in r…
View article: The effect of drainage on fine‐root biomass, production, and turnover in hemiboreal old‐growth forests on organic soils
The effect of drainage on fine‐root biomass, production, and turnover in hemiboreal old‐growth forests on organic soils Open
Information on the capacity of organic soils to capture and store carbon in old‐growth forests in the hemiboreal forest zone is scarce and fragmented. However, fine‐root data can provide valuable insights into soil carbon fluxes. Thus, the…
View article: Ground Cover Vegetation in Differently Managed Hemiboreal Norway Spruce Stands: Plantation vs. Natural Regeneration
Ground Cover Vegetation in Differently Managed Hemiboreal Norway Spruce Stands: Plantation vs. Natural Regeneration Open
Forest plantations, which have a simplified structure and composition, are becoming more frequent, raising concerns regarding their contribution to biological diversity in highly managed landscapes. The biological value of a stand has been…