Blar i USN Open Archive på forfatter "Odland, Arvid"
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Analysis of DNA polymorphism in wild populations of herb-Paris (Paris quadrifolia L., Trilliaceae) from Lithuania and Norway.
Jogaitė, Vaida; Lazutka, Juozas R.; Naujalis, Jonas; Stapulionyte, Asta; Odland, Arvid; Bjerketvedt, Dag (Journal article; Peer reviewed, 2006)Analysis of random amplified polymorphic DNA (RAPD) was used to determine genetic diversity within the populations of herb-Paris plant from Lithuania and Norway. RAPD analyses have shown 21.9 ± 5.2% of polymorphic loci in ... -
Are trampling effects by wild tundra reindeer understudied?
Heggenes, Jan; Odland, Arvid; Bjerketvedt, Dag (Journal article; Peer reviewed, 2018)Grazing and trampling by the wide-ranging wild tundra reindeer may have major top down landscape effects by causing vegetation changes. Grazing, as the collective effect of eating, trampling, defecation, and urination, has ... -
Differences in the vertical distribution pattern of Betula pubescens in Norway and its ecological significance
Odland, Arvid (Chapter; Peer reviewed, 1996)Several factors influence the altitudinal position of the climatic forest-limit. In addition to variations due to different "forest-limit" definitions, topographic factors are very important. In Western Norway, a range of ... -
Drivers of soil temperature variation in alpine lichen heaths and shrub vegetation during the summer
Aartsma, Peter; Odland, Arvid; Reinhardt, Stefanie; Renssen, Hans (Peer reviewed; Journal article, 2023)Lichen heaths are decreasing in abundance in alpine and Arctic areas because of an increased competition with shrubs. This shift in vegetation might have important consequences for the soil temperature. The aim of this ... -
Effect of latitude and mountain height on the timberline (Betula pubescens ssp. czerpanovii) elevation along the central Scandinavian mountain range
Odland, Arvid (Journal article; Peer reviewed, 2015)Previously published isoline maps of Fennoscandian timberlines show that their highest elevations lie in the high mountain areas in central south Norway and from there the limits decrease in all directions. These maps are ... -
Elvesnelle Equisetum flutiatile på vandring. Endringer i en elvesnellepopulasjon gjennom 29 år etter vannstandssenkning
Odland, Arvid (Journal article; Peer reviewed, 2017)Etter omfattende naturinngrep vil det alltid bli store konsekvenser for vegetasjonen i de berørte områdene. De artene som ikke er tilpasset de nye økologiske miljøforholdene vil med tiden enten dø, eller de må forflytte ... -
Estimation of lichen biomass with emphasis on reindeer winter pastures at Hardangervidda, S Norway
Odland, Arvid; Sandvik, Sylvi M.; Bjerketvedt, Dag; Myrvold, Linn L. (Journal article; Peer reviewed, 2014)Quantification of lichen abundance is important for management of reindeer populations. We measured dry lichen biomass in 876 micro plots (16.5 cm - 16.5 cm) systematically sampled within 219 vegetation plots (2 m - 2 m) ... -
Herbivore grazing—or trampling? Trampling effects by a large ungulate in cold high- latitude ecosystems
Heggenes, Jan; Odland, Arvid; Chevalier, Tomas; Ahlberg, Jörgen; Berg, Amanda; Larsson, Håkan; Bjerketvedt, Dag (Journal article; Peer reviewed, 2017)Mammalian herbivores have important top-down effects on ecological processes and landscapes by generating vegetation changes through grazing and trampling. For free-ranging herbivores on large landscapes, trampling is an ... -
Importance of mountain height and latitude for the altitudinal distribution limits of vascular plants in Scandinavia: are the mountains high enough?
Odland, Arvid (Journal article; Peer reviewed, 2010)The main aim of the present paper was to study regional differences in the altitudinal distribution limits of vascular plants in relation to mountain height and latitudinal position. Altitudinal limits from previously ... -
Kartlegging av snøbare rabber og vinterbeite i Brattefjell- Vindeggen
Hjeltnes, Arne; Bjerketvedt, Dag; Odland, Arvid; Tien Bui, Dieu; Heggenes, Jan (Skriftserien fra Høgskolen i Sørøst-Norge;17, Research report, 2018-01-11)Her gis en underveis-rapport om arbeidet med å utvikle en metode for å estimere tilgjengelige vinterbeiteressurser for villrein, i hovedsak basert på fjernanalyse (satellittbilder og ortofoto), supplert med feltregistreringer ... -
Microclimatic comparison of lichen heaths and shrubs: Shrubification generates atmospheric heating but subsurface cooling during the growing season
Aartsma, Peter; Asplund, Johan; Odland, Arvid; Reinhardt, Stefanie; Renssen, Hans (Peer reviewed; Journal article, 2021)Lichen heaths are declining in abundance in alpine and Arctic areas partly due to an increasing competition with shrubs. This shift in vegetation types might have important consequences for the microclimate and climate on ... -
Optimal foraging by a large ungulate in an extreme environment: Wild mountain reindeer select snow-free feeding habitats in winter
Romtveit, Lena; Strand, Olav; Mossing, Anders; Kastdalen, Leif; Hjeltnes, Arne William; Bjerketvedt, Dag Kjartan; Odland, Arvid; Heggenes, Jan (Journal article; Peer reviewed, 2021)Optimal foraging models predict that individual animals will optimize net energy gain by intensifying forage activity and/or reducing forage energy cost. Then, the free distribution model predicts an animal's distribution ... -
Petrifilm TM som alternativt medium for dyrking av bakterier i vann
Rosef, Olav; Odland, Arvid; Bjerketvedt, Dag (Journal article, 2002)Metoden NS-EN ISO 6222 er sammenlignet med Petrifilm for påvisning og telling av mikroorganismer i overflatevann (råvann) og i drikkevann (behandlet vann). De dyrkingstemperaturene som gjeldende drikkevannsforskrift angir ... -
Soft resilience: moisture-dependent lichen elasticity buffer herbivore trampling in cold alpine-tundra ecosystems
Heggenes, Jan; Fagertun, Christian; Odland, Arvid; Bjerketvedt, Dag K. (Peer reviewed; Journal article, 2020)Herbivores may have extensive top-down effects in open grazing ecosystems, generating vegetation changes by grazing and trampling. Trampling effects are understudied, but may be a major ecological factor. In cold alpine-Arctic ... -
Soil temperature variation in calciphile mountain plant communities in Southern Norway
Reinhardt, Stefanie; Odland, Arvid (Journal article; Peer reviewed, 2012)Soil temperature dynamics are considered to be of great importance for alpine plant life. The aim of this study was to analyse differences in soil temperature parameters between and within exposed ridges, leesides, and ... -
Strutseving (Matteúccia struthiópteris (L.) Tod.) - en vanlig bregneart som kan bli en gourmetgrønnsak også i Norge. Litteraturoversikt
Dragland, Steinar; Odland, Arvid (Bioforsk TEMA;, Research report, 2007)Det finnes et landbruksprodukt som er sterkt etterspurt i deler av USA og Canada, men som synes å være nesten ukjent i Europa. Produktet har blitt beskrevet som ”en smakfull og næringsrik grønnsak”. Råvaretilgangen og ... -
The growth and phenology patterns of herb Paris (Paris quadrifolia L., Trilliaceae): relation to soil and air temperatures
Bjerketvedt, Dag; Odland, Arvid; Lazutka, Juozas R.; Naujalis, Jonas (Journal article; Peer reviewed, 2003)The phenology and development of Paris quadrifolia L. has been related to variations in soil and air temperatures during four seasons (1997-2000). Its emergence appeared to be strongly dependant on soil temperature. Plants ... -
Variation in the structure of Matteuccia struthiopteris populations in Lithuania
Odland, Arvid; Naujalis, Jonas; Stapulionyte, Asta (Journal article; Peer reviewed, 2006)Demographic data and associated phytosociological and environmental variables were sampled from 25 populations dominated by the fern M. struthiopteris studied in different parts of Lithuania. The main aim was to study the ... -
Wild Mountain reindeer Rangifer tarandus tarandus winter foraging: snow-free areas a key resource for feeding
Holtan, Marijanne; Strand, Olav; Kastdalen, Leif; Bjerketvedt, Dag Kjartan; Odland, Arvid; Pape, Roland; Heggenes, Jan (Peer reviewed; Journal article, 2023)In a landscape with patchily distributed forage resources, an animal’s distribution may reflect the distribution of the resources if the population is forage-limited in time or space. This may be particularly explicit in ...