Åke Brännström
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View article: Pathways to an integrated understanding of marine environments and ecosystems in the Asia-Pacific Region
Pathways to an integrated understanding of marine environments and ecosystems in the Asia-Pacific Region Open
The Asia-Pacific Region (APR) encompasses a vast geographical area rich in marine biodiversity that plays critical roles in global ecological stability and climate regulation, but it also faces daunting challenges in maintaining these role…
View article: Physical drivers of benthic and pelagic algal biomass dynamics in lakes: a conceptual exploration with ‘Lake2D’
Physical drivers of benthic and pelagic algal biomass dynamics in lakes: a conceptual exploration with ‘Lake2D’ Open
Size, depth and basin shape are important factors controlling the physics, chemistry and, ultimately, the productivity of lakes. To our knowledge, a comprehensive theoretical investigation of the physical determinants of lake primary produ…
View article: Well-posedness of a variable-exponent telegraph equation applied to image despeckling
Well-posedness of a variable-exponent telegraph equation applied to image despeckling Open
In this paper, we present a telegraph diffusion model with variable exponents for image despeckling. Moving beyond the traditional assumption of a constant exponent in the telegraph diffusion framework, we explore three distinct variable e…
View article: Well-posedness of a Variable-Exponent Telegraph Equation Applied to Image Despeckling
Well-posedness of a Variable-Exponent Telegraph Equation Applied to Image Despeckling Open
In this paper, we present a telegraph diffusion model with variable exponents for image despeckling. Moving beyond the traditional assumption of a constant exponent in the telegraph diffusion framework, we explore three distinct variable e…
View article: Finding analytical approximations for discrete, stochastic, individual-based models of ecology
Finding analytical approximations for discrete, stochastic, individual-based models of ecology Open
Discrete time, spatially extended models play an important role in ecology, modelling population dynamics of species ranging from micro-organisms to birds. An important question is how 'bottom up', individual-based models can be approximat…
View article: Fruit harvesting: A potential threat to the persistence, spatial distribution, and establishment of plants
Fruit harvesting: A potential threat to the persistence, spatial distribution, and establishment of plants Open
Plant-frugivore interactions play a central role for plant persistence and spatial distribution by promoting the long-range dispersal of seeds by frugivores. However, plant-frugivore interactions are increasingly being threatened by anthro…
View article: libpspm: A feature-rich numerical package for solving physiologically structured population models
libpspm: A feature-rich numerical package for solving physiologically structured population models Open
For a vast majority of organisms, life-history processes depend on their physiological state, such as body size, as well as on their environment. Size-structured population models, or more generally, physiologically structured population m…
View article: Competition for light can drive adverse species-composition shifts in the Amazon Forest under elevated CO<sub>2</sub>
Competition for light can drive adverse species-composition shifts in the Amazon Forest under elevated CO<sub>2</sub> Open
The resilience of biodiverse forests to climate change depends on an interplay of adaptive processes operating at multiple temporal and organizational scales. These include short-term acclimation of physiological processes like photosynthe…
View article: Inference of the distribution of fitness effects of mutations is affected by single nucleotide polymorphism filtering methods, sample size and population structure
Inference of the distribution of fitness effects of mutations is affected by single nucleotide polymorphism filtering methods, sample size and population structure Open
The distribution of fitness effects (DFE) of new mutations has been of interest to evolutionary biologists since the concept of mutations arose. Modern population genomic data enable us to quantify the DFE empirically, but few studies have…
View article: Inference of the distribution of fitness effects of mutations is affected by SNP filtering methods, sample size and population structure
Inference of the distribution of fitness effects of mutations is affected by SNP filtering methods, sample size and population structure Open
The distribution of fitness effects (DFE) of new mutations has been of interest to evolutionary biologists since the concept of mutations arose.Modern population genomic data enable us to quantify the DFE empirically, but few studies have …
View article: Minor variations in multicellular life cycles have major effects on adaptation
Minor variations in multicellular life cycles have major effects on adaptation Open
Multicellularity has evolved several independent times over the past hundreds of millions of years and given rise to a wide diversity of complex life. Recent studies have found that large differences in the fundamental structure of early m…
View article: Roles of diversity and adaptation in the eco-evolutionary responses of biodiverse plant communities to climate change
Roles of diversity and adaptation in the eco-evolutionary responses of biodiverse plant communities to climate change Open
Climate change is projected to cause not only higher mean temperatures but also higher climate variability. Although elevated CO2 concentrations can potentially increase the productivity of some ecosystems, higher temperatures and more fre…
View article: Finding analytical approximations for discrete, stochastic, individual-based models of ecology
Finding analytical approximations for discrete, stochastic, individual-based models of ecology Open
Discrete time, spatially extended models play an important role in ecology, modelling population dynamics of species ranging from micro-organisms to birds. An important question is how 'bottom up', individual-based models can be approximat…
View article: The interactive effects of environmental gradient and dispersal shape spatial phylogenetic patterns
The interactive effects of environmental gradient and dispersal shape spatial phylogenetic patterns Open
Introduction The emergence and maintenance of biodiversity include interacting environmental conditions, organismal adaptation to such conditions, and dispersal. To understand and quantify such ecological, evolutionary, and spatial process…
View article: Minor variations in multicellular life cycles have major effects on adaptation
Minor variations in multicellular life cycles have major effects on adaptation Open
Multicellularity has evolved several independent times over the past hundreds of millions of years and given rise to a wide diversity of complex life. Recent studies have found that large differences in the fundamental structure of early m…
View article: Prediction of tree sapwood and heartwood profiles using pipe model and branch thinning theory
Prediction of tree sapwood and heartwood profiles using pipe model and branch thinning theory Open
Estimates of tree heartwood and sapwood profiles are important in the pulp industry and for dynamic vegetation models, in which they determine tree biomechanical stability and hydraulic conductivity. Several phenomenological models of stem…
View article: Plant-FATE &#8211; Predicting the adaptive responses of biodiverse plant communities using functional-trait evolution
Plant-FATE – Predicting the adaptive responses of biodiverse plant communities using functional-trait evolution Open
<p>We present Plant-FATE, a trait-size-structured vegetation model in which the time evolution of the size distribution of multiple species is modelled using the McKendrick-von Foerster partial differential equation. In our model, tr…
View article: Sharing the Burdens of Climate Mitigation and Adaptation: Incorporating Fairness Perspectives into Policy Optimization Models
Sharing the Burdens of Climate Mitigation and Adaptation: Incorporating Fairness Perspectives into Policy Optimization Models Open
Mitigation of, and adaptation to, climate change can be addressed only through the collective action of multiple agents. The engagement of involved agents critically depends on their perception that the burdens and benefits of collective a…
View article: A Method for Estimating the Number of Infections From the Reported Number of Deaths
A Method for Estimating the Number of Infections From the Reported Number of Deaths Open
At the outset of an epidemic, available case data typically underestimate the total number of infections due to insufficient testing, potentially hampering public responses. Here, we present a method for statistically estimating the true n…
View article: Eco‐evolutionary optimality as a means to improve vegetation and land‐surface models
Eco‐evolutionary optimality as a means to improve vegetation and land‐surface models Open
Summary Global vegetation and land‐surface models embody interdisciplinary scientific understanding of the behaviour of plants and ecosystems, and are indispensable to project the impacts of environmental change on vegetation and the inter…
View article: Mechanisms driving plant functional trait variation in a tropical forest
Mechanisms driving plant functional trait variation in a tropical forest Open
Plant functional trait variation in tropical forests results from taxonomic differences in phylogeny and associated genetic differences, as well as, phenotypic plastic responses to the environment. Accounting for the underlying mechanisms …
View article: Eco-evolutionary responses of plant communities to drought and rainfall variability
Eco-evolutionary responses of plant communities to drought and rainfall variability Open
<p>The future Earth is projected to experience elevated rainfall variability, with more frequent and intense droughts, as well as high-rainfall events. Increasing CO<sub>2</sub> concentrations are expected to raise terres…
View article: Fragmentation of production amplifies systemic risks from extreme events in supply-chain networks
Fragmentation of production amplifies systemic risks from extreme events in supply-chain networks Open
Climatic and other extreme events threaten the globalized economy, which relies on increasingly complex and specialized supply-chain networks. Disasters generate (i) direct economic losses due to reduced production in the locations where t…
View article: A tree’s quest for light—optimal height and diameter growth under a shading canopy
A tree’s quest for light—optimal height and diameter growth under a shading canopy Open
For trees in forests, striving for light is matter of life and death, either by growing taller toward brighter conditions or by expanding the crown to capture more of the available light. Here, we present a mechanistic model for the develo…
View article: COVID-19 healthcare demand and mortality in Sweden in response to non-pharmaceutical mitigation and suppression scenarios
COVID-19 healthcare demand and mortality in Sweden in response to non-pharmaceutical mitigation and suppression scenarios Open
Background While the COVID-19 outbreak in China now appears suppressed, Europe and the USA have become the epicentres, both reporting many more deaths than China. Responding to the pandemic, Sweden has taken a different approach aiming to …