A5045963872- Species Distribution and Climate Change
- Plant and animal studies
- Ecology and Vegetation Dynamics Studies
- Wildlife Ecology and Conservation
- Aquatic Ecosystems and Phytoplankton Dynamics
- Evolution and Genetic Dynamics
- Ecosystem dynamics and resilience
- Evolutionary Game Theory and Cooperation
- Marine and coastal ecosystems
- Forest Management and Policy
- Wildlife-Road Interactions and Conservation
- Marine Biology and Ecology Research
- Physiological and biochemical adaptations
- Avian ecology and behavior
- Indigenous Studies and Ecology
- Forest ecology and management
- Neural Networks and Applications
- Animal Ecology and Behavior Studies
- Climate Change Communication and Perception
- Genetic and phenotypic traits in livestock
- Fish Ecology and Management Studies
UiT The Arctic University of Norway
2016-2023
Centre for Arctic Gas Hydrate, Environment and Climate
2020
John Wiley & Sons (United States)
2019
Ecological Society of America
2019
Wyoming Game and Fish Department
2019
Centre National de la Recherche Scientifique
2014-2016
Station d’Écologie Théorique et Expérimentale
2014-2016
Google (United States)
2015
Michigan State University
2009-2011
Gifu University
2011
Phytoplankton compete for nutrients and light in a vertically heterogeneous environment determined by turbulent mixing. We analyzed model of competition between two phytoplankton species stratified water column. assume that the surface layer is uniformly mixed deep poorly mixed, as commonly observed lakes oceans. employed analytical techniques, I(out) - (R)theory game theoretical approach layer. Under our assumptions, at equilibrium, each either absent or resides benthic layer, Assuming...
Abstract A conspicuous season–diversity relationship ( SDR ) can be seen in seasonal environments, often with a defined peak active species diversity the growing season. We ask is this general pattern and are other patterns possible? In addition, we what ultimate cause of understand it using existing ecological theory? To accomplish task, assembled global database on changes through time environments for different taxa habitats also conducted modeling study an attempt to replicate observed...
Abstract Sustainable management of wildlife populations can be aided by building models that both identify current drivers natural dynamics and provide near‐term predictions future states. We employed a Strategic Foresight Protocol (SFP) involving stakeholders to decide the purpose structure dynamic state‐space model for population Willow Ptarmigan, popular game species in Norway. Based on local knowledge stakeholders, it was decided should include food web interactions climatic explanatory...
Abstract Assessing the effectiveness of conservation actions to halt population declines is challenging when confounded by other factors. We assessed whether culling red fox, a predator currently increasing in number sub‐Arctic, contributed recent recovery critically endangered Fennoscandian Lesser White‐fronted Goose Anser erythropus , while controlling for potentially confounding food web dynamics. Using 19 years data, 10 before and 9 after implementation annual fox culling, we estimated...
A recent theory of the vertical distribution phytoplankton considers how interacting niche construction processes such as resource depletion, behavior, and population dynamics contribute to spatial heterogeneity in aquatic environment. In poorly mixed water columns with opposing gradients nutrients light, predicts that a species should aggregate at single depth. This depth aggregation, or biomass maximum, change through time due depletion available resources. addition, aggregation be deeper...
According to recent reviews, the question of how trophic interactions may affect evolutionary responses climate change remains unanswered. In this modelling study, we explore dynamics thermal and plant-herbivore interaction traits in a warming environment. We find herbivore usually reduces adaptation speed persistence time plant by reducing biomass. However, if trait are correlated, herbivores can create different coevolutionary attractors. One attractor has warmer optimum, other colder one...
Evaluating the effectiveness of conservation actions is challenging for migratory species because a population can be impacted anywhere along its route. Conservation critically endangered Fennoscandian lesser white-fronted goose include culling red foxes in breeding area and habitat improvements reduction illegal hunting non-breeding areas. One goal predator control strategy to prevent adult birds from using an autumn migration route through western Asia, where mortality believed higher than...
Abstract Scavenging can have important consequences for food web dynamics, example, it may support additional consumer species and affect predation on live prey. Still, few models include scavenging. We develop a dynamic model that includes two facultative scavenger species, which we refer to as the predator or according their natural scavenging propensity, well prey, carrion pool show ramifications of in simple webs. Our modeling suggests presence scavengers both increase decrease kill...
Scavenging can have important consequences for food web dynamics, example, it may support additional consumer species and affect predation on live prey. Still, few models include scavenging. We develop a dynamic model that includes predators, scavengers, prey, carrion pool to show ramifications of scavenging in simple webs. explicitly biomass behavior investigate the effect under different assumptions. Our modeling suggests presence scavengers both increase decrease predator kill rates...
an overall positive effect of management. However, in Arctic ecosystems, factors such cyclic small rodent populations and fluctuations ungulate carrion availability can determine strong variation annual predation pressure turn affect geese recruitment survival. Using 19 years data, we investigated to what extent red fox culling contributed the recovery population. Specifically, evaluated whether removal had expected on LWFG reproductive success, while taking into account those outlined above...
The search for general patterns in ecology remains a challenge. However, nature has offered highly repeatable the form of seasonal change. Given annual (seasonal) cycle, we ask when year expect to observe highest active species diversity. We find consistent season–diversity relationship (SDR) many ecosystems with peak diversity during growing season. also some have multiple peaks year. In addition, build and apply mathematical models provide hypotheses on what ultimately may drive SDR. Photo...