Ørjan Totland's picture

Ørjan Totland

Head of Department
  • E-mailOrjan.Totland@uib.no
  • Phone+47 55 58 46 01+47 477 58 058
  • Visitor Address
    Thormøhlens gate 53 A/B
  • Postal Address
    Postboks 7803
    5020 Bergen
Academic article
  • Show author(s) 2021. Experimental warming differentially affects vegetative and reproductive phenology of tundra plants. Nature Communications. 12 pages.
  • Show author(s) 2020. Inadequate pollination services limit watermelon yields in northern Tanzania. Basic and Applied Ecology. 35-45.
  • Show author(s) 2020. Forest fragmentation modifies the composition of bumblebee communities and modulates their trophic and competitive interactions for pollination. Scientific Reports. 15 pages.
  • Show author(s) 2020. Enhancing pollination is more effective than increased conventional agriculture inputs for improving watermelon yields. Ecology and Evolution. 5343-5353.
  • Show author(s) 2020. Disentangling direct and indirect effects of habitat fragmentation on wild plants' pollinator visits and seed production. Ecological Applications. 13 pages.
  • Show author(s) 2019. Unfenced Borders Cause Differences in Vegetation and Fauna Between Protected and Unprotected Areas in a Tropical Savanna. Tropical Conservation Science.
  • Show author(s) 2018. Warming shortens flowering seasons of tundra plant communities. Nature Ecology and Evolution. 45-52.
  • Show author(s) 2018. Locally endangered tree species in a dry montane forest are enhanced by high woody species richness but affected by human disturbance. Journal of Arid Environments. 19-27.
  • Show author(s) 2018. Community level niche overlap and broad scale biogeographic patterns of bee communities are driven by phylogenetic history. Journal of Biogeography. 461-472.
  • Show author(s) 2018. BioTIME: A database of biodiversity time series for the Anthropocene. Global Ecology and Biogeography. 760-786.
  • Show author(s) 2017. Disentangling the contributions of dispersal limitation, ecological drift, and ecological filtering to wild bee community assembly. Ecosphere. 16 pages.
  • Show author(s) 2016. The relative importance of vertical soil nutrient heterogeneity, and mean and depth-specific soil nutrient availabilities for tree species richness in tropical forests and woodlands. Oecologia. 877-888.
  • Show author(s) 2016. The effects of habitat management on the species, phylogenetic and functional diversity of bees are modified by the environmental context. Ecology and Evolution. 961-973.
  • Show author(s) 2016. Performance of two alpine plant species along environmental gradients in an alpine meadow ecosystem in central Tibet. Ecological Research. 417-426.
  • Show author(s) 2016. Experimental simulation of pollinator decline causes community-wide reductions in seedling diversity and abundance. Ecology. 1420-1430.
  • Show author(s) 2015. Spatial distribution of temporal dynamics in anthropogenic fires in miombo savanna woodlands of Tanzania. Carbon Balance and Management. 15 pages.
  • Show author(s) 2015. Relationships between tree species richness, evenness and aboveground carbon storage in montane forests and miombo woodlands of Tanzania. Basic and Applied Ecology. 239-249.
  • Show author(s) 2015. Pollen limitation, species' floral traits and pollinator visitation: Different relationships in contrasting communities. Oikos. 174-186.
  • Show author(s) 2015. Interactions between Canopy Structure and Herbaceous Biomass along Environmental Gradients in Moist Forest and Dry Miombo Woodland of Tanzania. PLOS ONE. 15 pages.
  • Show author(s) 2015. Intense use of woody plants in a semiarid environment of Northern Ethiopia: Effects on species composition, richness and diversity. Journal of Arid Environments. 14-21.
  • Show author(s) 2015. Effects of experimentally simulated pollinator decline on recruitment in two European herbs. Journal of Ecology. 328-337.
  • Show author(s) 2015. Edge effects on plant communities along power line clearings. Journal of Applied Ecology. 871-880.
  • Show author(s) 2015. Does the abundance of dominant trees affect diversity of a widespread tropical woodland ecosystem in Tanzania? Journal of Tropical Ecology. 345-359.
  • Show author(s) 2015. Does multi-level environmental filtering determine the functional and phylogenetic composition of wild bee species assemblages? Ecography. 140-153.
  • Show author(s) 2014. The influence of floral symmetry, dependence on pollinators and pollination generalization on flower size variation. Annals of Botany. 157-165.
  • Show author(s) 2014. Structural properties of mutualistic networks withstand habitat degradation while species functional roles might change. Oikos. 323-333.
  • Show author(s) 2014. Spatio-temporal variation in species assemblages in field edges: Seasonally distinct responses of solitary bees to local habitat characteristics and landscape conditions. Biodiversity and Conservation. 2393-2414.
  • Show author(s) 2014. Spatial variation in plant species richness and diversity along human disturbance and environmental gradients in a tropical wetland. Wetlands Ecology and Management. 395-404.
  • Show author(s) 2014. Relationships between the density of two potential restoration tree species and plant species abundance and richness in a degraded Afromontane forest of Kenya. African Journal of Ecology. 77-87.
  • Show author(s) 2014. Plant species richness, evenness, and composition along environmental gradients in an Alpine meadow grazing ecosystem in Central Tibet, China. Arctic, Antarctic and Alpine research. 308-326.
  • Show author(s) 2014. Invasion of the cosmopolitan species Echinochloa colona into herbaceous vegetation of a tropical wetland system. Ecological Research. 969-979.
  • Show author(s) 2014. Heating effect by perianth retention on developing achenes and implications for seed production in the alpine herb Ranunculus glacialis. Alpine Botany. 37-47.
  • Show author(s) 2014. Community invasibility and invasion by non-native Fraxinus pennsylvanica trees in a degraded tropical forest. Biological Invasions. 2447-2755.
  • Show author(s) 2013. Woody vegetation dynamics in the rangelands of lower Omo region, southwestern Ethiopia. Journal of Arid Environments. 94-102.
  • Show author(s) 2013. Woody plant assemblages in isolated forest patches in a semiarid agricultural matrix. Biodiversity and Conservation. 2519-2535.
  • Show author(s) 2013. Plant functional traits mediate reproductive phenology and success in response to experimental warming and snow addition in Tibet. Global Change Biology. 459-472.
  • Show author(s) 2013. Phenological response of tundra plants to background climate variation tested using the International Tundra Experiment. Philosophical Transactions of the Royal Society of London. Biological Sciences. 13 pages.
  • Show author(s) 2013. Influence of Two N-Fixing Legumes on Plant Community Properties and Soil Nutrient Levels in an Alpine Ecosystem. Arctic, Antarctic and Alpine research. 363-371.
  • Show author(s) 2013. How do pollinator visitation rate and seed set relate to species' floral traits and community context? Oecologia. 881-893.
  • Show author(s) 2013. Experimental pollinator decline affects plant reproduction and is mediated by plant mating system. Journal of Pollination Ecology. 44-56.
  • Show author(s) 2013. Ecosystem responses to woody plant encroachment in a semiarid savanna rangeland. Plant Ecology. 1211-1222.
  • Show author(s) 2013. Are droppings, distance from pastoralist camps, and pika burrows good proxies for local grazing pressure? Rangeland Ecology & Management. 26-33.
  • Show author(s) 2012. Species composition and functional structure of herbaceous vegetation in a tropical wetland system. Biodiversity and Conservation. 2865-2885.
  • Show author(s) 2012. Recovery of plant species richness and composition in an abandoned forest settlement area in Kenya. Restoration Ecology. 462-474.
  • Show author(s) 2012. Interactions for pollinator visitation and their consequences for reproduction in a plant community. Acta Oecologica. 95-103.
  • Show author(s) 2011. Relationships between densities of previous and simultaneous foragers and the foraging behaviour of three bumblebee species. Ecological Entomology. 221-230.
  • Show author(s) 2011. Do disturbance and productivity influence evenness of seedling, sapling and adult tree species across a semi-deciduous tropical forest landscape? Oikos. 623-629.
  • Show author(s) 2011. Bamboo dominance reduces tree regeneration in a disturbed tropical forest. Oecologia. 161-168.
  • Show author(s) 2010. Recovery of plant species richness and composition after slash-and-burn agriculture in a tropical rainforest in Madagascar. Biodiversity and Conservation. 187-204.
  • Show author(s) 2010. Population dependence in the interactions with neighbors for pollination: A field experiment with Taraxacum officinale. American Journal of Botany. 760-769.
  • Show author(s) 2010. Local floral composition and the behaviour of pollinators: attraction to and foraging within experimental patches. Ecological Entomology. 652-661.
  • Show author(s) 2010. Factors related to the inter-annual variation in plants' pollination generalization levels within a community. Oikos. 825-834.
  • Show author(s) 2009. The relative importance of positive and negative interactions for pollinator attraction in a plant community. Ecological Research. 929-936.
  • Show author(s) 2009. The effects of environmental variables and human disturbance on woody species richness and diversity in a bamboo-deciduous forest in northeastern Thailand. Ecological Research. 147-156.
  • Show author(s) 2009. Relationships between the floral neighborhood and individual pollen limitation in two self-incompatible herbs. Oecologia. 707-719.
  • Show author(s) 2009. Pollen Limitation in the Alpine: a Meta-Analysis. Arctic, Antarctic and Alpine research. 103-111.
  • Show author(s) 2009. Co-flowering neighbors influence the diversity and identity of pollinator groups visiting plant species. Oikos. 691-702.
  • Show author(s) 2008. The relationships between floral traits and specificity of pollination systems in three Scandinavian plant communities. Oecologia. 249-257.
  • Show author(s) 2008. Simulated environmental change has contrasting effects on defensive compound concentration in three alpine plant species. Arctic, Antarctic and Alpine research. 709-715.
  • Show author(s) 2008. Macrophyte species diversity in formerly cultivated wetlands in Uganda. African Journal of Ecology. 646-654.
  • Show author(s) 2008. Is the magnitude of pollen limitation in a plant community affected by pollinator visitation and plant species specialisation levels? Oikos. 883-891.
  • Show author(s) 2008. Diversity-stability relationships of an alpine plant community under simulated environmental change. Arctic, Antarctic and Alpine research. 679-684.
  • Show author(s) 2007. Within-population spatial variation in pollinator visitation rates, pollen limitation on seed set, and flower longevity in an alpine species. Acta Oecologica. 262-268.
  • Show author(s) 2007. The relative role of dispersal and local interactions for alpine plant community diversity under simulated climate warming. Oikos. 1279-1288.
  • Show author(s) 2007. The effect of forest management operations on population performance of Vaccinium myrtillus on a landscape-scale. Basic and Applied Ecology. 231-241.
  • Show author(s) 2007. Pollen limitation affects progeny vigour and subsequent recruitment in the insect-pollinated herb Ranunculus acris. Oikos. 1204-1210.
  • Show author(s) 2007. Do alien plant invasions really affect pollination success in native plant species? Biological Conservation. 1-12.
  • Show author(s) 2006. Pollinator visitation, pollen limitation, and selection on flower size through female function in contrasting habitats within a population of Campanula persicifolia. Canadian Journal of Botany. 412-420.
  • Show author(s) 2006. Plant community responses to experimental warming across the tundra biome. Proceedings of the National Academy of Sciences of the United States of America. 1342-1346.
  • Show author(s) 2006. Effects of an exotic plant and habitat disturbance on pollinator visitation and reproduction in a boreal forest herb. American Journal of Botany. 868-873.
  • Show author(s) 2005. Willow canopies and plant community structure along an Alpine environmental gradient. Arctic, Antarctic and Alpine research. 428-435.
  • Show author(s) 2005. The relative importance of vegetation cover and abiotic environmental conditions for population dynamic parameters of two alpine plant species. Journal of Ecology. 493-501.
  • Show author(s) 2005. Simulated climate change altered dominance hierarchies and diversity of an alpine biodiversity hotspot. Ecology. 2047-2054.
  • Show author(s) 2005. Relationships between species' floral traits and pollinator visitation in a temperate grassland. Oecologia. 586-594.
  • Show author(s) 2005. Does forest gap size affects population size, plant size, reproductive success and pollinator visitation in Lantana camara, a tropical invasive shrub? Forest Ecology and Management. 329-338.
  • Show author(s) 2004. No evidence for a role of pollinator discrimination in causing selection on flower size through female reproduction. Oikos. 558-564.
  • Show author(s) 2004. Habitat dependent nurse-effects of the dwarf shrub Dryas octopetala on alpine and arctic plant community structure. Écoscience. 410-420.
  • Show author(s) 2003. Quantitative importance of staminodes for female reproductive success in Parnassia palustris under contrasting environmental conditions. Canadian Journal of Botany. 49-56.
  • Show author(s) 2003. Breeding system, insect flower visitation, and floral traits of two alpine Cerastium species. Arctic, Antarctic and Alpine research. 242-247.
  • Show author(s) 2002. Effects of willow canopies on species performance in a low-alpine community. Plant Ecology. 157-166.
  • Show author(s) 2002. Effects of temperature and date of snowmelt on growth, reproduction, and flowering phenology in the arctic/alpine herb, Ranunculus glacialis. Oecologia. 168-175.
  • Show author(s) 2001. Pollen limitation of reproductive success in two sympatric alpine willows (Salicaceae) with contrasting pollination strategies. American Journal of Botany. 1011-1015.
  • Show author(s) 2001. Environment-dependent pollen limitation and selection on floral traits in an alpine species. Ecology. 2233-2244.
  • Show author(s) 2000. Short-term effects of simulated environmental changes on phenology, reproduction, and growth in the late-flowering snowbed herb Saxifraga stellaris L. Écoscience. 201-213.
  • Show author(s) 1999. Wind to insect pollination ratios and floral traits in five alpine Salix species. Canadian Journal of Botany. 556-563.
  • Show author(s) 1999. Responses of tundra plants to experimental warming: meta-analysis of the International Tundra Experiment. Ecological Monographs. 491-511.
  • Show author(s) 1999. Environmentally-dependent pollen limitation on seed production in alpine Ranunculus acris. Écoscience. 173-179.
  • Show author(s) 1999. Effects of temperature on performance and phenotypic selection of plant traits in alpine Ranunculus acris. Oecologia. 242-251.
  • Show author(s) 1999. Effects of temperature and natural disturbance on growth, reproduction, and population density, in the alpine annual hemiparasite Euphrasia frigida. Arctic, Antarctic and Alpine research. 259-263.
  • Show author(s) 1999. Breeding system and effects of plant size and flowering time on reproductive success in the alpine herb Saxifraga stellaris L. Arctic, Antarctic and Alpine research. 196-201.
  • Show author(s) 1998. Determinants of pollinator activity and flower preference in the early spring blooming Crocus vernus. Acta Oecologica. 155-165.
  • Show author(s) 1998. Assessment of environmental change effects on performance and density of Bistorta vivipara by multivariate analysis and experimental manipulations. Journal of Ecology. 989-998.
  • Show author(s) 1997. Response to simulated climate change in an alpine and sub-arctic pollen-risk strategist, Silene acaulis. Global Change Biology. 74-79.
  • Show author(s) 1997. Limitations on reproduction in alpine Ranunculus acris. Canadian Journal of Botany. 137-144.
  • Show author(s) 1997. Effects of plant traits on pollen limitation in an early spring flowering herb. Oikos. 491-501.
  • Show author(s) 1997. Effects of flowering time and temperature on growth and reproduction in Leontodon autumnalis var. taraxaci, a late-flowering alpine plant. Arctic and Alpine Research. 285-290.
  • Show author(s) 1996. Flower heliotropism in an alpine population of Ranunculus acris (Ranunculaceae): effects on flower temperature, insect visitation, and seed production. American Journal of Botany. 452-458.
  • Show author(s) 1996. Factors influencing inter-population variation in Ranunculus acris seed production in an alpine area of southwestern Norway. Ecography. 269-270.
  • Show author(s) 1994. Intra-seasonal variation in pollination intensity and seed set in an alpine population ofRanunculus acris in southwestern Norway. Ecography. 159-165.
  • Show author(s) 1994. Influence of climate, time of day and season, and flower density on insect flower visitation in alpine Norway. Arctic and Alpine Research. 66-71.
  • Show author(s) 1993. Pollination in alpine Norway: flowering phenology, insect visitors, and visitation rates in two plant communities. Canadian Journal of Botany. 1072-1079.
Popular scientific lecture
  • Show author(s) 2010. Honningbienes bidrag til pollinering av ville vekster.
  • Show author(s) 2004. Plantenes seksualliv.
  • Show author(s) 2001. Hvorfor har fjellplanter så kjedelige blomster?
Academic lecture
  • Show author(s) 2018. KD hos bioCEED.
  • Show author(s) 2011. Relationships between two potential restoration tree species and species richness and abundance in a degraded afromontane forest of Kenya.
  • Show author(s) 2008. Pollination ecology.
  • Show author(s) 2007. Prosjekt 154185: Pollineringsinteraksjoner på samfunnsnivå: effekter på planters tiltrekningsevne og reproduksjon.
  • Show author(s) 2007. Prosjekt 134927: Klimaendringseffekter på artsdiversitet og sammensetning i artsrike alpine områder.
  • Show author(s) 2007. Manipulating pollinator abundances in natural plant cummunities: impacts on plant reproduction, population growth and species composition.
  • Show author(s) 2007. Co-flowering species influence the ecological pollinator specialization of plant species.
  • Show author(s) 2006. Effects of simulated environmental change on epidermal UV-B transmission and concentration of phenolic compounds in three alpine plant species.
  • Show author(s) 2005. Simulated climate change altered dominance hierarchies and diversity of a mountain biodiversity-hotspot.
  • Show author(s) 2005. Is there a typical alpine flower?
  • Show author(s) 2005. Alien invasion and habitat disturbance: effects on pollination and reproduction in a native boreal forest herb.
  • Show author(s) 2005. Alien impacts on pollination of natives.
  • Show author(s) 2004. Effekter av klimaforandring på artsdiversitet i alpine reinrosesamfunn i Sør-Norge.
  • Show author(s) 2004. Does a highly attractive exotic species affect pollinator visitation and reproductive success of a boring boreal forest herb?
  • Show author(s) 2002. Quantitative importance of the staminodes for female reproductive success in Parnassia palustris L.
  • Show author(s) 2001. Pollinators care, but plants don’t: selection on the alpine pollination syndrome.
  • Show author(s) 2001. ITEX work at Finse.
  • Show author(s) 2001. Community responses to experimental warming at Finse.
  • Show author(s) 1999. Temperature-based variation in selection on floral traits in alpine Ranunculus acris.
  • Show author(s) 1999. Presentation of ITEX.
  • Show author(s) 1999. Pollen limitation and phenotypic selection in alpine Ranunculus acris.
Reader opinion piece
  • Show author(s) 2012. Overplaying the role of honey bees as pollinators: a comment on Aebi and Neumann (2011). Trends in Ecology & Evolution. 141-142.
Academic anthology/Conference proceedings
  • Show author(s) 2000. The Scandinavian Association for Pollination Ecology Honors Knut Fægri. Det Norske Videnskaps-Akademi.
Non-fiction book
  • Show author(s) 2013. Kunnskapsstatus for insektpollinering i Norge - betydningen av det komplekse samspillet mellom planter og insekter. Artsdatabanken.
  • Show author(s) 2004. Øvingshefte i plantediversitet – BOT100.
  • Show author(s) 2003. Øvingshefte i plantediversitet – B100.
  • Show author(s) 2002. Øvingshefte i botanikk – B100.
Popular scientific article
  • Show author(s) 2015. Klimaendringer og plante-pollinator interaksjoner. Biolog. 29-34.
  • Show author(s) 2008. Avskoging i Øst Afrika og på Madagaskar: suksesjon, samfunnsstruktur, og artskomposisjon i et restaureringsperspektiv. Årsmelding, Institutt for naturforvaltning. 20-23.
  • Show author(s) 2006. Effekter av klimaendringer på artsmangfoldet i alpine plantesamfunn. Årsmelding, Institutt for naturforvaltning. 8-10.
  • Show author(s) 1997. Økologiske effekter av global oppvarming på alpine planter. Naturen. 5-11.
Feature article
  • Show author(s) 2010. Blomster og bier i krise. Aftenposten Innsikt.
  • Show author(s) 2010. Blomster og bier i krise. Aftenposten (morgenutg. : trykt utg.).
  • Show author(s) 1999. Våre sårbare fjellområder. Bergens Tidende.
Doctoral dissertation
  • Show author(s) 1995. Community pollination and reproductive ecology of Ranunculus acris in an alpine area of south-west Norway.
  • Show author(s) 2011. Ville vært en katastrofe å legge ned studiet.
  • Show author(s) 2011. Fortsatt for få søkere, til tross for garantert jobb.
  • Show author(s) 2010. Luker vekk navn fra listen over verdens planter.
  • Show author(s) 2010. Bier på retrett.
  • Show author(s) 2009. 150 år siden evolusjonsteorien.
  • Show author(s) 2008. Fauna-forsker finner farer.
  • Show author(s) 2007. Bare surr for biene.
  • Show author(s) 2005. Pollineringseksperiment på Ryghsetra.
  • Show author(s) 2002. Mer skog og mindre vidde.
  • Show author(s) 2001. Mistelteinen må få leve.
  • Show author(s) 2001. Mistelteinen er felt.
  • Show author(s) 2001. Kamp for misteltein.
Programme participation
  • Show author(s) 2020. Trumfer klimakrisen over biodiversitetskrisen?
  • Show author(s) 2009. Klimaeffektforskning på Finse.
  • Show author(s) 2007. Om rød snø i fjellet på sommeren.
  • Show author(s) 2007. Om dårlig sommer, humler og planters frøproduksjon.
  • Show author(s) 2007. Om bie-død og konsekvenser.
  • Show author(s) 2007. Klimaforandring og pollinering.
  • Show author(s) 2007. Biene i trøbbel.
  • Show author(s) 2005. Pollineringseksperiment på Ryghsetra.
  • Show author(s) 2004. Om aliens, blomster og bier.
Academic chapter/article/Conference paper
  • Show author(s) 2017. Carbon Stocks and Plant Diversity in Different Land Cover Types of Tanzania. 24 pages.
  • Show author(s) 2007. Vegetasjonen på byfjellene i et varmere klima. 8 pages.
  • Show author(s) 2000. Is there a typical alpine flower? 10 pages.
  • Show author(s) 2000. Environment modifies phenotypic selection on flower diameter in alpine Saxifraga stellaris. 8 pages.
  • Show author(s) 1998. Plantelivet på Finse i et varmere klima. 1 pages.
  • Show author(s) 1998. Blomster på soljakt. 1 pages.
  • Show author(s) 1997. Effekter av temperatur og forstyrrelse på reproduksjon hos den ettårige fjelløyentrøst, Euphrasia frigida Pugsley, Finse. 5 pages.
  • Show author(s) 1997. Blomster, fluer og frø. 2 pages.
  • Show author(s) 2005. Alien invasion and habitat disturbance: effects on pollination and reproduction in a native boreal forest herb. 195.
  • Show author(s) 2010. Plant-pollinator interactions - the impact of invasive species.
  • Show author(s) 2007. Natur ute av fase ? den triste historien om bien og blomsten.
  • Show author(s) 2005. The importance of biodiversity, flower size and competition vs facilitation for pollinator attraction at plant community scale.
  • Show author(s) 2005. Does a highly attractive alien species affect pollinator visitation and reproductive success of a native boreal forest herb?
  • Show author(s) 2005. Are alien species a threat to biodiversity. A review of studies on plant – pollinator interactions between alien and native plant species.
  • Show author(s) 2004. Pollination interactions in ecosystems.
  • Show author(s) 2019. Author Correction: Warming shortens flowering seasons of tundra plant communities. Nature Ecology and Evolution. 709-709.
Academic literature review
  • Show author(s) 2012. Global assessment of experimental climate warming on tundra vegetation: heterogeneity over space and time. Ecology Letters. 164-175.
  • Show author(s) 2009. How does climate warming affect plant-pollinator interactions? Ecology Letters. 184-195.
  • Show author(s) 2000. Knut Fægri, animals on flowers, and the Scandinavian Assocciation for Pollination Ecology. 9-10.
Article in business/trade/industry journal
  • Show author(s) 2010. Natural forest regeneration and succession: an option for restoration of degraded forests. ?. 20-28.
  • Show author(s) 2006. Om klima, blomster og bier. Cicerone. 17-19.

More information in national current research information system (CRIStin)