A5065846760- Animal Ecology and Behavior Studies
- Ecology and Vegetation Dynamics Studies
- Wildlife Ecology and Conservation
- Species Distribution and Climate Change
- Avian ecology and behavior
- Animal Behavior and Reproduction
- Botany and Plant Ecology Studies
- Plant and animal studies
- Geology and Paleoclimatology Research
- Climate change and permafrost
- Peatlands and Wetlands Ecology
- Climate variability and models
- Tree-ring climate responses
- Marine animal studies overview
- Bird parasitology and diseases
- Arctic and Antarctic ice dynamics
- Isotope Analysis in Ecology
- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Neuroendocrine regulation and behavior
- Bat Biology and Ecology Studies
- Rangeland and Wildlife Management
- Cryospheric studies and observations
University of Turku
2013-2023
Nord University
2018-2020
UiT The Arctic University of Norway
2014
Norwegian University of Science and Technology
2009
University of Oslo
2004-2009
Abstract Climate change is resulting in a rapid expansion of shrubs the Arctic. This has been shown to be reinforced by positive feedbacks, and it could thus set ecosystem on trajectory toward an alternate, more productive regime. Herbivores, other hand, are known counteract effects simultaneous climate warming shrub biomass. However, little about impact herbivores resilience these ecosystems, that is, capacity system absorb disturbance still remain same regime, retaining function,...
Mammalian herbivores shape the structure and function of many nutrient-limited or low-productive terrestrial ecosystems through modification plant communities plant–soil feedbacks. In tundra biome, mammalian may both accelerate decelerate biomass growth, microbial activity nutrient cycling, that is, ecosystem process rates. Selective foraging associated declines palatable species are known to be major drivers However, in dominant plants low palatability often linked with high herbivore...
Behavioral differences between dispersers and residents have long been recognized in animal species, but it remains unclear whether these dispersal syndromes represent consistent over time different contexts (i.e., personalities) or short-term changes behavior during dispersal. We analyzed interindividual sociability (attraction to unfamiliar adult males females), exploration, locomotor activity disperser resident root voles, Microtus oeconomus. recorded behavioral traits 50 animals before...
Abstract Aim Understanding the forces shaping biodiversity patterns, particularly for groups of organisms with key functional roles, will help predict responses ecosystems to environmental changes. Our aim was evaluate relative role different drivers in diversity patterns vertebrate herbivores, a group exerting strong trophic influence terrestrial Arctic ecosystems. This biome, traditionally perceived as homogeneous and low biodiversity, includes wide variation biotic physical conditions is...
Marked variation occurs in both seasonal and multiannual population density peaks of northern European small mammal species, including voles. The availability dietary proteins is a key factor limiting the growth herbivore species. objective this study to investigate degree which protein influences increasing vole populations. We hypothesise that summer folivorous populations positively associated with availability. A field experiment was conducted over reproductive period 18 vegetated...
Communities are assembled from species that evolve or colonise a given geographic region, and persist in the face of abiotic conditions interactions with other species. The evolutionary colonisation histories communities characterised by phylogenetic diversity, while functional diversity is indicative biotic conditions. relationship between infers whether traits divergent (differing related species) convergent (similar among distantly species). Biotic known to influence macroecological...
The relative importance of top‐down and bottom‐up mechanisms in shaping community structure is still a highly controversial topic ecology. Predatory control herbivores thought to relax herbivore impact on the vegetation through trophic cascades. However, cascades may be weak terrestrial systems as complexity food webs makes responses harder predict. Alternatively, prevails, but top‐level (predator or herbivore) changes according productivity levels. Here we show how spatial variation...
In small mammals living in highly seasonal environments, observational studies show that female home range size and exclusiveness are smaller the nonbreeding winter season than breeding summer season. This has led to notion females more social decrease territorial behavior during winter. However, because territoriality decreases with increasing population density, density normally increases season, effects of on structure usually confounded. To find out which 2 factors explains space use, we...
Spatial variation in the strength of trophic cascades arctic tundra has been related to flows subsidies across ecosystem boundaries. Here, we ask whether input marine systems would cause spatial rodent–plant interactions between coastal areas, where predators have access marine‐derived resources, and non‐subsidized inland areas northern Fennoscandia. We present a detailed evaluation predator–rodent–vegetation along coast‐inland gradient, during 2011 rodent outbreak two following decline...
Abstract Mild winter weather causing snow to melt and ice accumulate on the ground has been proposed cause decreased survival of individuals, less pronounced cyclicity, small rodent populations in Fennoscandia. However, detailed data linking accumulation is lacking. We live‐trapped monitored with passive integrated transponders enclosed root voles ( Microtus oeconomus ) exposed different amounts through a mild winter. studied how social behaviour responded accumulation. Voles avoided by...
Abstract The relative contributions of habitat and food availability on fitness may provide evidence for key features needed to safeguard population persistence. However, defining quality a species can be complex task, especially if knowledge the relationship between individual performance is lacking. Here, we determined importance suitable forest habitat, body mass from masting tree female lifetime reproductive success ( LRS ) Siberian flying squirrels P teromys volans ). We calculated 500...
The continued global biodiversity crisis necessitates the continuation and development of new well‐designed monitoring strategies action plans with particular focus on under‐represented countries regions. However, limited resources in terms budget availability qualified field personnel can restrict geographical coverage efforts. Focusing efforts a representative subset species locations improve cost‐efficiency. Optimal performance multi‐species indicators derived from such an approach...
Large predators may affect the hunting efficiency of smaller ones directly by decreasing their numbers, or indirectly altering behaviour. Either way this have positive effects on density shared prey. Using large outdoor enclosures, we experimentally studied whether presence Tengmalm's owl Aegolius funereus affects smallest member vole‐eating predator guild, least weasel Mustela nivalis, as measured population responses coexisting prey species, field vole Microtus agrestis and sibling M....
Nest predation studies often use artificial nests to secure sample sizes and nest distribution patterns that allow empirically testing differences in rates between ecological units of interest. These rely on the assumption natural experience similar or consistent relative across gradients. As this may depend several factors (for example predator community, construction, parental care patterns), it is important test whether provide adequate comparable estimates nests. In study, we compare...
Abstract Competition, habitat structure and predation risk may alter mobility activity of animals. In particular, small predators need to weigh the positive negative impacts presence competing larger predator species. Other present a but also enhance efficiency smaller if avoiding one species increases prey exposure other. We studied how avian affected patterns radio‐collared least weasels Mustela nivalis , small‐bodied highly specialized on hunting rodents subject intraguild predation....
Small rodents are prevalent and functionally important across the world's biomes, making their monitoring salient for ecosystem management, conservation, forestry, agriculture. There is a growing need cost-effective noninvasive methods large-scale, intensive sampling. Fecal pellet counts readily provide relative abundance indices, given suitable analytical methods, feces could also allow determination of multiple ecological physiological variables, including community composition. In this...