A5043632384- Indigenous Studies and Ecology
- Wildlife Ecology and Conservation
- Rangeland Management and Livestock Ecology
- Ecology and biodiversity studies
- Climate change and permafrost
- Ruminant Nutrition and Digestive Physiology
- Genetic and phenotypic traits in livestock
- Animal Behavior and Welfare Studies
- Rangeland and Wildlife Management
- Forest Management and Policy
- Peatlands and Wetlands Ecology
- Research in Social Sciences
- Forest Ecology and Biodiversity Studies
- Evolutionary Psychology and Human Behavior
- Cryospheric studies and observations
- Animal Behavior and Reproduction
- Effects of Environmental Stressors on Livestock
- Environmental Conservation and Management
- Botany and Plant Ecology Studies
- Animal Vocal Communication and Behavior
- Reproductive Physiology in Livestock
- Forest ecology and management
- Human-Animal Interaction Studies
- Plant and fungal interactions
- Geophysical Methods and Applications
Natural Resources Institute Finland
2015-2025
University of Helsinki
2006
Joensuu Science Park
2006
University of Oulu
2003-2006
Finnish Environment Institute
2006
University of Jyväskylä
2006
International Centre for Reindeer Husbandry
2004
Wisconsin Disability Association
2003
Significance Many ecological and evolutionary processes strongly depend on the way natural selection varies over time. However, a gap remains when trying to connect theoretical predictions empirical work this question: Most theory assumes that adaptation involves tracking moving optimum phenotype through time, but is seldom estimated empirically. Here, we have assembled large database of wild bird mammal populations, estimate patterns fluctuations in breeding date its influence variability...
Filarioid parasites represent major health hazards with important medical, veterinary, and economic implications, considerable potential to affect the everyday lives of tens millions people globally (World Health Organization, 2007). Scenarios for climate change vary latitudinally regionally involve direct indirect linkages increasing temperature dissemination, amplification, invasiveness vector-borne parasites. High latitude regions are especially influenced by global thus may be prone...
The focus of the work was to investigate dependency between reindeer density and lichen (Cladonia spp.) ranges in Finnish semidomesticated management area. Secondly, we formed a model on recovery rate ungrazed woodland (29 sites) after forest fires evaluate potential productivity time needed for recover at optimal production. During 1974-95, 59% variation mean (range: 0.7-3.0 reindeer/km² total land area) among herding districts Finland explained by proportion area covered these districts....
Abstract In polygynous mammals, fitness differences may reflect in phenotypic quality as well experience. This study determines dominance hierarchy among female reindeer Rangifer tarandus from two experimental herds (consisting of c . 45 animals each) during 2 consecutive years. The influence body mass, antler size and age on social rank the was investigated, first using simple regression analysis. combined effect further assessed principal component analysis, these three parameters were...
Abstract In polygynous species, male reproductive success is often correlated with dominance status of individual males and sex ratio in the population. Reindeer, Rangifer tarandus , a here we compared variation during two successive years herd male:female 1:7 1:3. Copulations were recorded, together data on hierarchy size mating groups. Male was estimated by paternity analysis calves using microsatellite DNA markers. The distribution among highly skewed for both most dominant also being...
Abstract In sexually dimorphic ungulates, male reproductive success depends on fighting with other males for access to females during a brief rutting season. Large body size is necessary in intrasexual competition, and few large‐sized are often able monopolize female groups. Earlier studies have reported that effort increases age until prime‐age reached, one study population density lowered (older) males. No has directly assessed whether there within‐age‐class variation resulting from...
In polygynous ungulates, biologists commonly assume that the role of males in population dynamics is negligible since male's physiological capacity to inseminate females normally will not be a limiting factor for calving rates. Recently, however, research indicates may more important than previously acknowledged because availability affect conception dates and hence synchrony. many harvested or otherwise managed populations, sex ratio highly skewed toward young male age structure often...
<span style="font-family: 'Times New Roman';">During past decades, the amounts of infrastructure and human activity have increased in northern latitudes. Although effects development on wild reindeer caribou been widely examined, its semidomesticated herding environment are still poorly understood. We studied how seven different activities (population centres, buildings, main roads, forest snowmobile tracks, skiing trails, gold digging areas) affect range selection by semi-domesticated...
In a context of climate change, mismatch has been shown to occur between some species' reproductive phenology and their environment. So far, few studies have either documented temporal trends in calving or assessed which climatic variables influence the ungulate species, yet ungulates' births affects offspring survival population's recruitment rate. Using long-term dataset (45 years) birth dates semi-domesticated reindeer population Kaamanen, North Finland, we show that season advanced by ~...
Evolutionary models of sex ratio adjustment applied to mammals have ignored that females may gain indirect genetic benefits from their mates. The differential allocation hypothesis (DAH) predicts bias the offspring towards (more costly) males when breeding with an attractive male. We manipulated number available during rut in a polygynous ungulate species, reindeer ( Rangifer tarandus ), and found doubling average male mass (and thus attractiveness) herd increased proportion approximately 40...
<ja:p>Democratic societiesâ emphasis on individual rights and freedoms inevitably opens them up to political disputes. Conflict management should thus be seen as an integral part of democratic institutional design. The evolution policy disputes concerning the use different natural resources in Finland is analysed by using theoretical models frame analysis strategic interaction. studied include lake fisheries, watercourse regulation, reindeer herding, forestry. design case studies varies....
The semi-domesticated nature of the reindeer (Rangifer tarandus L.) makes it a distinct case among world's herbivores. Here, we review literature on how shape vegetation and soil carbon nitrogen cycles in northernmost Fennoscandia. We first describe main historical events that shaped present-day grazing patterns different countries, then discuss methodological considerations needed for interpreting evidence from grazer exclosures ecological environmental contexts. argue is critical to be...
Abstract A developing trophic mismatch between the peak of energy demands by reproducing animals and forage availability has caused many species’ reproductive success to decrease. The match–mismatch hypothesis (MMH) is an appealing concept that can be used assess such fitness consequences. However, concerns have been raised on applying MMH capital breeders as reindeer because reliance maternal capita rather than dietary income may mitigate negative effects changing phenologies. Using a...
Abstract Background Extensive animal production systems, such as reindeer husbandry may represent a system to further study the context dependence of stress responses and potential implications for welfare research on food has so far primarily focused animals in intensive systems while from extensive reindeer, are yet underrepresented. We investigated short- longer-term repeated herding, handling restraint its effect semi-domesticated adult female ( Rangifer tarandus ). also assessed...
In this work we investigated the effects of local weather and snow conditions on reproduction survival semi-domesticated reindeer (Rangifer t. tarandus) from 1962 to 1987 in four separate study areas northern Finland. Reindeer density had no negative effect calf percentage slaughter (October-January) any area. The higher number very warm days or mean temperatures summer, lower was all forested (Sodankyla, Muonio Ivalo). area, also reduced by winters with abundant accumulation. open,...
The present state of reindeer winter and summer pastures in northern Finland has been mapped using field sampling, remote sensing, GIS. pasture inventory was made during 1995-96 the 1997-98. Winter can be divided into ground lichen arboreal pastures. Autumn pastures, including with grasses, dwarf shrubs, mushrooms, were also added to Summer partly overlap, but main areas are clearly distinct from each other. Major feeding marshes, mires river meadows, mountain birch woodland. Biomass data...