Jonas Dahlgren
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View article: Light competition affects how tree growth and survival respond to climate
Light competition affects how tree growth and survival respond to climate Open
Competition between individuals is a key process that drives tree growth and survival in forests. Ecological theories predict that the effect of competition should be weaker in stressful environments. However, quantitative studies have fai…
View article: Forest Productivity Decreases in Response to Recent Changes in Vegetation Structure and Climate in the Latitudinal Extremes of the European Continent
Forest Productivity Decreases in Response to Recent Changes in Vegetation Structure and Climate in the Latitudinal Extremes of the European Continent Open
Aim Climate change is driving increasingly frequent and intense extreme climatic events, pushing many forests worldwide beyond their physiological thresholds. Despite the major role played by forests in the global carbon cycle, climate cha…
View article: Relative decline in density of Northern Hemisphere tree species in warm and arid regions of their climate niches
Relative decline in density of Northern Hemisphere tree species in warm and arid regions of their climate niches Open
Although climate change is expected to drive tree species toward colder and wetter regions of their distribution, broadscale empirical evidence is lacking. One possibility is that past and present human activities in forests obscure or alt…
View article: Positive feedbacks and alternative stable states in forest leaf types
Positive feedbacks and alternative stable states in forest leaf types Open
The emergence of alternative stable states in forest systems has significant implications for the functioning and structure of the terrestrial biosphere, yet empirical evidence remains scarce. Here, we combine global forest biodiversity ob…
View article: Current and future drought vulnerability for three dominant boreal tree species
Current and future drought vulnerability for three dominant boreal tree species Open
Climate change is projected to increase the frequency and severity of droughts, possibly causing sudden and elevated tree mortality. Better understanding and predictions of boreal forest responses to climate change are needed to efficientl…
View article: Risk of drought damage in Swedish forests
Risk of drought damage in Swedish forests Open
The dataset compiled here was used in a study whose objective was to estimate the drought vulnerability for the dominant boreal tree species (Norway spruce, Scots pine, and birch) using the extensive tree-ring network and tree, stand, and …
View article: Risk of drought damage in Swedish forests
Risk of drought damage in Swedish forests Open
The dataset compiled here was used in a study whose objective was to estimate the drought vulnerability for the dominant boreal tree species (Norway spruce, Scots pine, and birch) using the extensive tree-ring network and tree, stand, and …
View article: Abundance of Northern Hemisphere tree species declines in the warm and arid regions of their climatic niches
Abundance of Northern Hemisphere tree species declines in the warm and arid regions of their climatic niches Open
Climate change is expected to drive species towards colder and wetter regions of their distribution with alternative processes such as forest management having the potential to alter species displacements. Here, using data from more than t…
View article: Beyond mean fitness: Demographic stochasticity and resilience matter at tree species climatic edges
Beyond mean fitness: Demographic stochasticity and resilience matter at tree species climatic edges Open
Aim Linking local population dynamics and species distributions is crucial to predicting the impacts of climate change. Although many studies focus on the mean fitness of populations, theory shows that species distributions can be shaped b…
View article: Taller and slenderer trees in Swedish forests according to data from the National Forest Inventory
Taller and slenderer trees in Swedish forests according to data from the National Forest Inventory Open
Changes over time in annual basal area growth and mean height for Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) Karst.) over the period, 1983–2020 were studied using sample tree data from temporary plots recorded in …
View article: Beyond mean fitness: demographic stochasticity and resilience matter at tree species climatic edges
Beyond mean fitness: demographic stochasticity and resilience matter at tree species climatic edges Open
Aim Linking local population dynamics and species distributions is critical to predicting the impacts of climate change. While many studies focus on the mean fitness of populations, theory shows that species distributions can be shaped by …
View article: Divergent occurrences of juvenile and adult trees are explained by both environmental change and ontogenetic effects
Divergent occurrences of juvenile and adult trees are explained by both environmental change and ontogenetic effects Open
Recent climate warming has fueled interest into climate‐driven range shifts of tree species. A common approach to detect range shifts is to compare the divergent occurrences between juvenile and adult trees along environmental gradients us…
View article: Colonization and extinction dynamics and their link to the distribution of European trees at the continental scale
Colonization and extinction dynamics and their link to the distribution of European trees at the continental scale Open
Aim The population processes that drive tree species distribution are still widely debated. We test the hypotheses that metapopulation processes of colonization and extinction are linked to predictions of species distribution models. Locat…
View article: Predicting bilberry and cowberry yields using airborne laser scanning and other auxiliary data combined with National Forest Inventory field plot data
Predicting bilberry and cowberry yields using airborne laser scanning and other auxiliary data combined with National Forest Inventory field plot data Open
The increasing availability of wall-to-wall remote sensing datasets in combination with accurate field data enables the mapping of different ecosystem services more accurately and over larger areas than before. The provision of wild berrie…
View article: Occurrence but not intensity of mortality rises towards the climatic trailing edge of tree species ranges in European forests
Occurrence but not intensity of mortality rises towards the climatic trailing edge of tree species ranges in European forests Open
Aim Tree mortality is increasing world‐wide, leading to changes in forest composition and altering global biodiversity. Nonetheless, owing to the multifaceted stochastic nature of tree mortality, large‐scale spatial patterns of mortality a…
View article: Rapid Changes in Ground Vegetation of Mature Boreal Forests—An Analysis of Swedish National Forest Inventory Data
Rapid Changes in Ground Vegetation of Mature Boreal Forests—An Analysis of Swedish National Forest Inventory Data Open
The boreal forest floor vegetation is critical for ecosystem functioning and an important part of forest biodiversity. Given the ongoing global change, knowledge on broad-scale changes in the composition and abundance of different plant sp…
View article: Lessons learned from assessing the cover and yield of bilberry and lingonberry using the national forest inventories in Finland and Sweden
Lessons learned from assessing the cover and yield of bilberry and lingonberry using the national forest inventories in Finland and Sweden Open
Bilberry ( L.) and lingonberry ( L.) can be a part of healthy diet and are important for many animals. Two approaches are described to assessing their vegetation cover and berry yield via national forest inventory (NFI) observations. The a…
View article: Occurrence but not intensity of mortality rises towards the climatic trailing edge of tree species ranges in European forests
Occurrence but not intensity of mortality rises towards the climatic trailing edge of tree species ranges in European forests Open
Aim Tree mortality is increasing worldwide, leading to changes in forest composition and altering global biodiversity. Yet, due to the multi-faceted stochastic nature of tree mortality, large-scale spatial patterns of mortality across spec…
View article: Demographic performance of European tree species at their hot and cold climatic edges
Demographic performance of European tree species at their hot and cold climatic edges Open
Species range limits are thought to result from a decline in demographic performance at range edges. However, recent studies reporting contradictory patterns in species demographic performance at their edges cast doubt on our ability to pr…
View article: Forest inventory data from Finland and Sweden for: Demographic performance of European tree species at their hot and cold climatic edges, plus ancillary climate data
Forest inventory data from Finland and Sweden for: Demographic performance of European tree species at their hot and cold climatic edges, plus ancillary climate data Open
1. Species range limits are thought to result from a decline in demographic performance at range edges. However, recent studies reporting contradictory patterns in species demographic performance at their edges cast doubt on our ability to…
View article: Presence–absence sampling for estimating plant density using survey data with variable plot size
Presence–absence sampling for estimating plant density using survey data with variable plot size Open
Presence–absence sampling is an important method for monitoring state and change of both individual plant species and communities. With this method, only the presence or absence of the target species is recorded on plots and thus the metho…
View article: How do trees respond to species mixing in experimental compared to observational studies?
How do trees respond to species mixing in experimental compared to observational studies? Open
For decades, ecologists have investigated the effects of tree species diversity on tree productivity at different scales and with different approaches ranging from observational to experimental study designs. Using data from five European …
View article: Data from: Data gaps and opportunities for comparative and conservation biology
Data from: Data gaps and opportunities for comparative and conservation biology Open
Biodiversity loss is a major challenge. Over the past century, the average rate of vertebrate extinction has been about 100-fold higher than the estimated background rate and population declines continue to increase globally. Birth and dea…
View article: Similar patterns of background mortality across Europe are mostly driven by drought in European beech and a combination of drought and competition in Scots pine
Similar patterns of background mortality across Europe are mostly driven by drought in European beech and a combination of drought and competition in Scots pine Open
Aim Background tree mortality is a complex demographic process that affects forest structure and long-term dynamics. We aimed to test how drought intensity interacts with interspecific and intraspecific competition (or facilitation) in sha…
View article: Identifying the tree species compositions that maximize ecosystem functioning in European forests
Identifying the tree species compositions that maximize ecosystem functioning in European forests Open
Forest ecosystem functioning generally benefits from higher tree species richness, but variation within richness levels is typically large. This is mostly due to the contrasting performances of communities with different compositions. Evid…