A5065658635- Avian ecology and behavior
- Wildlife Ecology and Conservation
- Indigenous Studies and Ecology
- Rangeland and Wildlife Management
- Animal Behavior and Reproduction
- Ecology and Vegetation Dynamics Studies
- Species Distribution and Climate Change
- Genetic and phenotypic traits in livestock
- Climate change and permafrost
- Bird parasitology and diseases
- Animal Behavior and Welfare Studies
- Historical and Archaeological Studies
- Animal Nutrition and Physiology
- Ecology and biodiversity studies
- Cryospheric studies and observations
- Animal Ecology and Behavior Studies
- Rural development and sustainability
- Social and Educational Sciences
- Environmental DNA in Biodiversity Studies
- Arctic and Russian Policy Studies
- Plant and animal studies
- Marine and coastal plant biology
- Research in Social Sciences
- Lichen and fungal ecology
- Education, Healthcare and Sociology Research
Norwegian Institute for Nature Research
2014-2024
The FRAM Centre
2014-2024
Norwegian Institute for Cultural Heritage Research
2020
NILU
2005-2017
Aarhus University
2008
Wildfowl & Wetlands Trust
2008
Research Institute for Nature and Forest
2008
American Geophysical Union
2007
University of New Mexico
2007
University of Wales
2007
Abstract Intensification of agriculture since the 1950s has enhanced availability, competitive ability, crude protein content, digestibility and extended growing seasons forage grasses. Spilled cereal grain also provides a rich food source in autumn winter. Long‐distance migratory herbivorous geese have rapidly exploited these feeding opportunities most species shown expansions range population size last 50 years. Results long‐term studies are presented from two Arctic‐breeding populations,...
The Arctic is becoming warmer at a high rate, and contractions in the extent of sea ice are currently changing habitats marine top-predators dependent on ice. Polar bears (Ursus maritimus) depend for hunting seals. For these top-predators, longer ice-free seasons hypothesized to force hunt alternative terrestrial food, such as eggs from colonial breeding birds. We analyzed time-series polar bear observations four locations Spitsbergen (Svalbard) one east Greenland. Summer occurrence bears,...
The study focuses on vegetation changes in the Nordic mountain birch forest northern Norway, covering a period of more than 40 yr. area comprises municipalities Kautokeino and Karasjok Finnmarkskvidda; it is predominantly covered by lichen dwarf shrub vegetation. Sizes various classes were estimated use remote-sensing techniques ground surveys. A significant change cover during was registered whole area. Vegetation types dominated bilberry (Vaccinium myrtillus), wavy hair-grass (Deschampsia...
An International Species Management Plan for the Svalbard population of pink-footed goose was adopted under Agreement on Conservation African-Eurasian Migratory Waterbirds in 2012, first case adaptive management a migratory waterbird Europe. international working group (including statutory agencies, NGO representatives and experts) agreed objectives actions to maintain favourable conservation status, while accounting biodiversity, economic recreational interests. Agreements include setting...
Abstract Populations of large grazing birds have increased in Europe during the past five decades, raising conflicts between conservation and farming interests. Managing these requires knowledge about currently unknown relationship population sizes crop damage levels. We analysed unique data on reported, inspected compensated caused by geese, swans cranes together with from surveys Sweden to investigate how bird abundance is related levels at national scale 2000 2015. Over study period,...
Summary For migratory birds the implications of environmental change may be difficult to predict because they use multiple sites during their annual cycle. Moreover, migrants’ these interdependent. Along flyway Svalbard pink‐footed goose Anser brachyrhynchus population, Norwegian farmers organized scaring minimize grasslands in spring. We assessed consequences this practice for regional site geese along spring migration route. used dynamic programming find sequence decisions that maximizes...
We examined the cost of reproduction in high-Arctic barnacle geese (Branta leucopsis Bechstein) by manipulating length incubation period ± 5 days. Unmanipulated clutches were used as controls. Nests with prolonged suffered a higher egg loss to predators than control nests and shortened incubation. Among females incubation, body condition at hatching was significant lower among These, however, did not increase their feeding effort compensate for mass loss. Increased levels parental affect...
An earlier onset of spring has been recorded for many parts Eurasia in recent decades. This consequences migratory species, both changing the conditions encountered by individuals on reaching sites and affecting cues regulating timing migration where decisions to migrate are influenced local environmental variables. Here we examine two arctic goose populations, pink‐footed Anser brachyrhynchus (during 1990–2003) barnacle Branta leucopsis 1982–2003), which breed Svalbard. The...
This paper presents results from a multidisciplinary study of negotiation process between farmers and wildlife authorities which led to an agricultural subsidy scheme alleviate conflicts agriculture geese in Norway. The Svalbard-breeding population pink-footed Anser brachyrhynchus has increased considerably over the last decades with have escalated, especially at stopover sites spring when feed on newly sprouted pasture grass. In Vesterålen, important site for North Norway, deployed scaring...
Summary Increasing population sizes of geese are the cause numerous agricultural conflicts in many regions Northern Hemisphere. Scaring is often used as a tool to chase away from fields, either means protect vulnerable crops or part goose management schemes drive accommodation areas. Geese quick habituate stationary scaring devices; hence, active by humans employed. However, it remains undocumented how much effort required for be effective. We explored relationship between intensity human on...
All long-distance migrants must cope with changing environments, but species differ greatly in how they do so. In some species, individuals might be able to adjust by learning from individual experiences and copying others. This could speed up the process of adjustment, evidence wild is scarce. Here, we investigated processes which a rapidly growing population barnacle geese (Branta leucopsis) responded strong environmental changes on spring-staging areas Norway. One area, Helgeland, has...
To sustainably exploit a population, it is crucial to understand and reduce uncertainties about population processes effects of harvest. In migratory species, management challenged by geographically separated changing environmental conditions, which may cause unexpected changes in species distribution We describe the development harvest Svalbard-breeding pink-footed geese (Anser brachyrhynchus) relation observed trajectory behaviour population. autumn, migrate via stopover sites Norway...
In 2012, the four countries hosting Svalbard population of pink-footed goose Anser brachyrhynchus along its flyway launched an International Species Management Plan for population. One aims was to reduce conflicts between geese and agriculture acceptable level. Since 2006, Norway has offered subsidies farmers that provide refuge areas on their land. We evaluate mid-Norwegian management subsidy scheme, with a view adjustment prevailing ecological socio-economic parameters. The analysis...
Migratory connectivity by birds may mutually affect different ecosystems over large distances. Populations of geese overwintering in southern areas while breeding high-latitude have increased strongly the past decades. The increase is likely due to positive feedbacks caused climate change at both wintering, stopover sites and grounds, land-use practices grounds protection from hunting. Here we show how increasing goose populations temperate regions, success Arctic, entail a feedback with...
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...
Tourism in the Arctic archipelago of Svalbard, Norway, has increased significantly last decade. Cruise ships make landings all around archipelago, and there are numerous snowmobile, boat hiking excursions. We describe disturbance effects on three geese species that breed Svalbard: pink-footed goose (Anser brachyrhynchus), barnacle (Branta leucopsis) light-bellied brent bernicla hrota). All regarded as highly vulnerable to disturbance. Behavioural responses by humans foot were analysed...
Wild geese foraging on farmland cause increasing conflicts with agricultural interests, calling for a strategic approach to mitigation. In central Norway, between farmers and spring-staging pink-footed feeding pastures have escalated. To alleviate the conflict, scheme by which are subsidized allow forage undisturbed was introduced. guide allocation of subsidies, an ecological-based ranking fields at regional level recommended applied. Here we evaluate scheme. On average, 40 % were in top 5...
Arctic-breeding geese acquire resources for egg production from overwintering grounds, spring stopover sites and breeding where pollutant exposure may differ. We investigated the effect of migration strategy on occurrence lipophilic polychlorinated biphenyls (PCBs) protein-associated poly- perfluoroalkyl substances (PFASs) mercury (Hg) in eggs herbivorous barnacle ( Branta leucopsis) an island colony Svalbard. Stable isotopes (δ13C δ15N) vegetation collected along route were similar....
European populations of geese, swans and cranes have increased considerably since the 1970s raising conflicts between conservation farming interests. Crop damage caused by across national scale needs a trans-boundary approach that captures site-specific characteristics crop at more refined spatial scale, to deal with high spatio-temporal variation inherent in system avoid conflict displacement. In present study we use long-term data (2000–2015) Sweden evaluate seasonal annual patterns...
Long-distance migratory animals must contend with global climate change, but they differ greatly in whether and how adjust. Species that socially learn their migration routes may have an advantage this process compared to other species, as learned changes are passed on the next generation can speed up adjustment. However, evidence from wild social learning helps migrants adjust environmental change is absent. Here, we study behavioural processes by which barnacle geese (Branta leucopsis)...
We examined seasonal decline in clutch size the high arctic Barnacle Goose Branta leucopsis Svalbard. Females that arrived first at breeding ground nested first, had longest prelaying period, produced largest clutches and also incubation period. Nevertheless, their brood hatching was larger than late nesters. These results do not support nutrient reallocation hypothesis which suggests nesting geese from mobilization of reserves during period before egg laying. Instead, we propose arrive area...