Blar i Brage INN på forfatter "Andreassen, Harry Peter"
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Influence of light availability and soil productivity on insect herbivory on bilberry (Vaccinium myrtillus L.) leaves following mammalian herbivory
Schrijvers-Gonlag, Marcel; Skarpe, Christina; Andreassen, Harry Peter (Peer reviewed; Journal article, 2020)Vegetative parts of bilberry (Vaccinium myrtillus) are important forage for many boreal forest mammal, bird and insect species. Plant palatability to insects is affected by concentration of nutrients and defense compounds ... -
Let’s stay together? Intrinsic and extrinsic factors involved in pair bond dissolution in a recolonizing wolf population
Milleret, Cyril; Wabakken, Petter; Liberg, Olof; Åkesson, Mikael; Flagstad, Øystein; Andreassen, Harry Peter; Sand, Håkan (Journal article; Peer reviewed, 2016)For socially monogamous species, breeder bond dissolution has important consequences for population dynamics, but the extent to which extrinsic or intrinsic population factors causes pair dissolution remain poorly understood, ... -
Local and Regional Determinants of Colonisation- Extinction Dynamics of a Riparian Mainland-Island Root Vole Metapopulation
Glorvigen, Petter; Andreassen, Harry Peter; Ims, Rolf A. (Journal article; Peer reviewed, 2013)The role of local habitat geometry (habitat area and isolation) in predicting species distribution has become an increasingly more important issue, because habitat loss and fragmentation cause species range contraction ... -
Matching social-ecological systems by understanding the spatial scale of environmental attitudes
Andreassen, Harry Peter; Gangås, Kristin Evensen; Kaltenborn, Bjørn Petter (Peer reviewed; Journal article, 2018) -
Musefarmen : fra atferd til bestandsdynamikk i Eksperimentelle modellsystemer
Andreassen, Harry Peter (Chapter; Peer reviewed, 2014)På Musefarmen på Evenstad har vi siden 1989 studert smågnagerbestander ved å bruke såkalte Eksperimentelle modellsystemer (EMS). Gjennom EMS bruker vi arter med små arealkrav og egenskaper som gjør at vi i løpet av kort ... -
New views on how population-intrinsic and community-extrinsic processes interact during the vole population cycles
Andreassen, Harry Peter; Glorvigen, Petter; Rémy, Alice; Ims, Rolf A. (Journal article; Peer reviewed, 2013)Based on evidence from a series of recent studies linking behaviour to demography in experimental vole populations we propose how intrinsic and extrinsic factors interact through the various phases of the multi-annual ... -
Phase- and season-dependent changes in social behaviour in cyclic vole populations
Johnsen, Kaja; Devineau, Olivier; Andreassen, Harry Peter (Peer reviewed; Journal article, 2019) -
Population cycles and outbreaks of small rodents: ten essential questions we still need to solve
Andreassen, Harry Peter; Sundell, Janne; Ecke, Fraucke; Halle, Stefan; Haapakoski, Marko; Henttonen, Heikki; Huitu, Otso; Jacob, Jens; Johnsen, Kaja; Koskela, Esa; Luque‑Larena, Juan Jose; Lecomte, Nicolas; Leirs, Herwig; Mariën, Joachim; Neby, Magne; Rätti, Osmo; Sievert, Thorbjörn; Singleton, Grant R.; Cann, Joannes van; Vanden Broecke, Bram; Ylönen, Hannu (Peer reviewed; Journal article, 2021)Most small rodent populations in the world have fascinating population dynamics. In the northern hemisphere, voles and lemmings tend to show population cycles with regular fuctuations in numbers. In the southern hemisphere, ... -
Predator-dependent functional response in wolves: from food limitation to surplus killing
Zimmermann, Barbara; Sand, Håkan; Wabakken, Petter; Liberg, Olof; Andreassen, Harry Peter (Journal article; Peer reviewed, 2014)The functional response of a predator describes the change in per capita kill rate to changes in prey density. This response can be influenced by predator densities, giving a predator-dependent functional response. In ... -
Scavenger community structure along an environmental gradient from boreal forest to alpine tundra in Scandinavia
Gomo, Gjermund; Rød-Eriksen, Lars; Andreassen, Harry Peter; Mattisson, Jenny; Odden, Morten; Devineau, Olivier; Eide, Nina Elisabeth (Peer reviewed; Journal article, 2020)Scavengers can have strong impacts on food webs, and awareness of their role in ecosystems has increased during the last decades. In our study, we used baited cam-era traps to quantify the structure of the winter scavenger ... -
Seasonal- and phase-dependent effects on vole population dynamics
Johnsen, Kaja (Doctoral thesis, 2018)Populasjonssykluser hos smågnagere er en viktig komponent i det boreale barskogsøkosystemet på de nordlige breddegrader. Mange hypoteser har blitt beskrevet for å forsøke å forklare disse sykliske svingningene, men predasjon, ... -
Seasonality shapes the amplitude of vole population dynamics rather than generalist predators
Andreassen, Harry Peter; Johnsen, Kaja; Joncour, Barbara; Neby, Magne; Odden, Morten (Peer reviewed; Journal article, 2019) -
Settlement in empty versus occupied habitats : an experimental study on bank voles
Glorvigen, Petter; Bjørnstad, Ottar N.; Andreassen, Harry Peter; Ims, Rolf Anker (Journal article; Peer reviewed, 2012)Abstract Despite the recognised im 23 portance of colonisation (settlement in empty habitats) and immigration (settlement in an established population) to species persistence and evolution few have investigated these ... -
Small mammal responses to moose supplementary winter feeding
Pedersen, Simen; Mathisen, Karen Marie; Gorini, Lucrezia; Andreassen, Harry Peter; Røskaft, Eivin; Skarpe, Christina (Journal article; Peer reviewed, 2014)Supplementary feeding of wild large herbivores is a widespread practice in North America and Europe. The presence of feeding stations may have ecological consequences through changes to animal distributions, patterns ... -
Small rodent monitoring at Birkebeiner road, Norway
Neby, Magne; Andreassen, Harry Peter; Milleret, Cyril Pierre; Pedersen, Simen; Tamayo, Ana-Maria; Sanchez, David Carricondo; Versluijs, Erik; Zimmermann, Barbara (Peer reviewed; Journal article, 2023)Background. Northern small mammal populations are renowned for their multi-annual population cycles. Population cycles are multi-faceted and have extensive impacts on the rest of the ecosystem. In 2011, we started a ... -
Soil properties after forest rehabilitation by planting teak and mahogany in Java, Indonesia
Udayana, Cicik; Skarpe, Christina; Solberg, Svein Øivind; Mathisen, Karen Marie; Andreassen, Harry Peter (Peer reviewed; Journal article, 2019) -
Surviving winter: Food, but not habitat structure, prevents crashes in cyclic vole populations
Johnsen, Kaja; Boonstra, Rudy; Boutin, Stan; Devineau, Olivier; Krebs, Charles J.; Andreassen, Harry Peter (Journal article; Peer reviewed, 2016)Vole population cycles are a major force driving boreal ecosystem dynamics in north - western Eurasia. However, our understanding of the impact of winter on these cycles is ... -
The alternative prey hypothesis revisited: Still valid for willow ptarmigan population dynamics
Breisjøberget, Jo Inge; Odden, Morten; Wegge, Per; Zimmermann, Barbara; Andreassen, Harry Peter (Peer reviewed; Journal article, 2018) -
The disturbance of resident populations of field voles (Microtus agrestis) by immigrants
Riotte-Lambert, Louise; Remy, Alice Melisande Jacynthe; Andreassen, Harry Peter (Peer reviewed; Journal article, 2012) -
The disturbance of resident populations of field voles (Microtus agrestis) by immigrants
Riotte-Lambert, Louise; Rémy, Alice; Andreassen, Harry Peter (Journal article; Peer reviewed, 2012)The introduction of immigrants into resident populations may disturb the social organisation of the latter. It is often stated that males compete with males for access to mates, while females compete with females and/or ...