Rolf A Ims

Summary

Affiliation: University of Troms
Country: Norway

Publications

  1. pmc Density-dependent dispersal and spatial population dynamics
    Rolf A Ims
    Department of Biology, University of Tromsø, N 9037 Tromsø, Norway
    Proc Biol Sci 272:913-8. 2005
  2. doi request reprint Collapsing population cycles
    Rolf A Ims
    Department of Biology, University of Tromsø, NO 9037 Tromsø, Norway
    Trends Ecol Evol 23:79-86. 2008
  3. doi request reprint The importance of marine vs. human-induced subsidies in the maintenance of an expanding mesocarnivore in the arctic tundra
    Siw T Killengreen
    Department of Arctic and Marine Biology, University of Tromsø, 9037 Tromsø, Norway
    J Anim Ecol 80:1049-60. 2011
  4. pmc Phase-dependent outbreak dynamics of geometrid moth linked to host plant phenology
    Jane U Jepsen
    Department of Biology, University of Tromsø, N 9037 Tromsø, Norway
    Proc Biol Sci 276:4119-28. 2009
  5. pmc Anisotropic patterned population synchrony in climatic gradients indicates nonlinear climatic forcing
    Snorre B Hagen
    Department of Biology, University of Tromsø, 9037 Tromsø, Norway
    Proc Biol Sci 275:1509-15. 2008
  6. ncbi request reprint No impact of pupal predation on the altitudinal distribution of autumnal moth and winter moth (Lepidoptera: Geometridae) in sub-arctic birch forest
    Norun M Hansen
    Department of Biology, University of Tromsø, NO 9037 Tromsø, Norway
    Environ Entomol 38:627-32. 2009
  7. ncbi request reprint Climate change and outbreaks of the geometrids Operophtera brumata and Epirrita autumnata in subarctic birch forest: evidence of a recent outbreak range expansion
    Jane U Jepsen
    Department of Biology, University of Tromsø, N 9037 Tromsø, Norway
    J Anim Ecol 77:257-64. 2008
  8. doi request reprint Are population outbreaks in sub-arctic geometrids terminated by larval parasitoids?
    Tino Schott
    Department of Arctic and Marine Biology, University of Tromsø, N 9037 Tromsø, Norway
    J Anim Ecol 79:701-8. 2010
  9. doi request reprint Climate events synchronize the dynamics of a resident vertebrate community in the high Arctic
    Brage B Hansen
    Centre for Conservation Biology, Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway
    Science 339:313-5. 2013
  10. doi request reprint Nonstationary spatio-temporal small rodent dynamics: evidence from long-term Norwegian fox bounty data
    John André Henden
    Department of Biology, University of Tromsø, Tromsø NO 9037, Norway
    J Anim Ecol 78:636-45. 2009

Collaborators

Detail Information

Publications27

  1. pmc Density-dependent dispersal and spatial population dynamics
    Rolf A Ims
    Department of Biology, University of Tromsø, N 9037 Tromsø, Norway
    Proc Biol Sci 272:913-8. 2005
    ..Simulations of a simple mathematical model, parametrized on the basis of our experimental data, verify the empirical results, namely that the observed negative density-dependent dispersal did not have a significant synchronizing effect...
  2. doi request reprint Collapsing population cycles
    Rolf A Ims
    Department of Biology, University of Tromsø, NO 9037 Tromsø, Norway
    Trends Ecol Evol 23:79-86. 2008
    ..Thus, collapses of these cycles are also expected to imply collapses of important ecosystem functions, such as the pulsed flows of resources and disturbances...
  3. doi request reprint The importance of marine vs. human-induced subsidies in the maintenance of an expanding mesocarnivore in the arctic tundra
    Siw T Killengreen
    Department of Arctic and Marine Biology, University of Tromsø, 9037 Tromsø, Norway
    J Anim Ecol 80:1049-60. 2011
    ....
  4. pmc Phase-dependent outbreak dynamics of geometrid moth linked to host plant phenology
    Jane U Jepsen
    Department of Biology, University of Tromsø, N 9037 Tromsø, Norway
    Proc Biol Sci 276:4119-28. 2009
    ..This suggests that the timing of spring phenology plays a role in the large-scale synchronization of birch forest moth outbreaks...
  5. pmc Anisotropic patterned population synchrony in climatic gradients indicates nonlinear climatic forcing
    Snorre B Hagen
    Department of Biology, University of Tromsø, 9037 Tromsø, Norway
    Proc Biol Sci 275:1509-15. 2008
    ..did not. These results are interpreted in light of the biological characteristics of the species...
  6. ncbi request reprint No impact of pupal predation on the altitudinal distribution of autumnal moth and winter moth (Lepidoptera: Geometridae) in sub-arctic birch forest
    Norun M Hansen
    Department of Biology, University of Tromsø, NO 9037 Tromsø, Norway
    Environ Entomol 38:627-32. 2009
    ..These results narrow down the range of possible explanations for the altitudinal distribution pattern of these insects in northern birch forests...
  7. ncbi request reprint Climate change and outbreaks of the geometrids Operophtera brumata and Epirrita autumnata in subarctic birch forest: evidence of a recent outbreak range expansion
    Jane U Jepsen
    Department of Biology, University of Tromsø, N 9037 Tromsø, Norway
    J Anim Ecol 77:257-64. 2008
    ..brumata outbreaks in regions previously affected solely by E. autumnata outbreaks is likely to increase the effective duration of local outbreaks, and hence have profound implications for the subarctic birch forest ecosystem...
  8. doi request reprint Are population outbreaks in sub-arctic geometrids terminated by larval parasitoids?
    Tino Schott
    Department of Arctic and Marine Biology, University of Tromsø, N 9037 Tromsø, Norway
    J Anim Ecol 79:701-8. 2010
    ....
  9. doi request reprint Climate events synchronize the dynamics of a resident vertebrate community in the high Arctic
    Brage B Hansen
    Centre for Conservation Biology, Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway
    Science 339:313-5. 2013
    ..Icing is predicted to become more frequent in the circumpolar Arctic and may therefore strongly affect terrestrial ecosystem characteristics...
  10. doi request reprint Nonstationary spatio-temporal small rodent dynamics: evidence from long-term Norwegian fox bounty data
    John André Henden
    Department of Biology, University of Tromsø, Tromsø NO 9037, Norway
    J Anim Ecol 78:636-45. 2009
    ..e. period lengthening and shortening). 4. These results show that the dynamics of Fennoscandian small rodents, and their associated guild of predators, are more prone to change than previously acknowledged...
  11. pmc Determinants of lemming outbreaks
    Rolf A Ims
    Department of Arctic and Marine Biology, University of Tromsø, N 9037 Tromsø, Norway
    Proc Natl Acad Sci U S A 108:1970-4. 2011
    ..The combination of continued climatic warming and dampened vole cycles is expected to further decrease the frequency, amplitude, and geographic range of lemming outbreaks in tundra ecosystems...
  12. pmc Intrapopulation variability shaping isotope discrimination and turnover: experimental evidence in arctic foxes
    Nicolas Lecomte
    Department of Arctic and Marine Biology, University of Tromsø, Tromsø, Norway
    PLoS ONE 6:e21357. 2011
    ....
  13. pmc How spatial variation in areal extent and configuration of labile vegetation states affect the riparian bird community in Arctic tundra
    John André Henden
    Department of Arctic and Marine Biology, University of Tromsø, Tromsø, Norway
    PLoS ONE 8:e63312. 2013
    ....
  14. ncbi request reprint Phenology and abundance in relation to climatic variation in a sub-arctic insect herbivore-mountain birch system
    Ragnhild R Mjaaseth
    Department of Biology, University of Tromsø, 9037, Tromsø, Norway
    Oecologia 145:53-65. 2005
    ..We suggest rather that natural enemies at low altitudes limit larval survival and thus abundance of E. autumnata, while an early onset of winter at the forest limit reduces survival of late eclosing adults of O. brumata...
  15. doi request reprint Parasite intensity and fur coloration in reindeer calves - contrasting artificial and natural selection
    Rolf Rødven
    Department of Biology, University of Tromsø, Tromsø N 9037, Norway
    J Anim Ecol 78:600-7. 2009
    ..In either case, parasitism by warble flies appears to be a proximate cause driving coloration of reindeer towards a reduced variability in natural populations...
  16. pmc Analysing diet of small herbivores: the efficiency of DNA barcoding coupled with high-throughput pyrosequencing for deciphering the composition of complex plant mixtures
    Eeva M Soininen
    Department of Biology, University of Tromsø, N 9037 Tromsø, Norway
    Front Zool 6:16. 2009
    ..abstract:..
  17. ncbi request reprint Ringed seal post-moulting movement tactics and habitat selection
    Carla Freitas
    Norwegian Polar Institute, Polar Environmental Centre, 9296 Tromsø, Norway
    Oecologia 155:193-204. 2008
    ..This flexibility in ringed seal spatial ecology during summer and fall is expected to result in increased population viability in this high Arctic environment...
  18. ncbi request reprint Rationale, concepts and approach to the assessment
    Terry V Callaghan
    Abisko Scientific Research Station, Sweden
    Ambio 33:393-7. 2004
  19. ncbi request reprint Past changes in Arctic terrestrial ecosystems, climate and UV radiation
    Terry V Callaghan
    Abisko Scientific Research Station, Sweden
    Ambio 33:398-403. 2004
    ....
  20. ncbi request reprint Biodiversity, distributions and adaptations of Arctic species in the context of environmental change
    Terry V Callaghan
    Abisko Scientific Research Station, Sweden
    Ambio 33:404-17. 2004
    ..In contrast, Arctic plant and animal species are very likely to change their distributions rather than evolve significantly in response to warming...
  21. ncbi request reprint Responses to projected changes in climate and UV-B at the species level
    Terry V Callaghan
    Abisko Scientific Research Station, Sweden
    Ambio 33:418-35. 2004
    ..In contrast, invertebrates and microorganisms are very likely to quickly expand their ranges northwards into the Arctic...
  22. ncbi request reprint Effects on the structure of Arctic ecosystems in the short- and long-term perspectives
    Terry V Callaghan
    Abisko Scientific Research Station, Sweden
    Ambio 33:436-47. 2004
    ..Insects that harass reindeer in the summer are also likely to become more widespread, abundant and active during warmer summers while refuges for reindeer/caribou on glaciers and late snow patches will probably disappear...
  23. ncbi request reprint Effects on the function of Arctic ecosystems in the short- and long-term perspectives
    Terry V Callaghan
    Abisko Scientific Research Station, Sweden
    Ambio 33:448-58. 2004
    ..Shrubs and trees increase snow depth which in turn increases winter soil temperatures. Future changes in vegetation driven by climate change are therefore, very likely to profoundly alter regional climate...
  24. ncbi request reprint Effects of changes in climate on landscape and regional processes, and feedbacks to the climate system
    Terry V Callaghan
    Abisko Scientific Research Station, Sweden
    Ambio 33:459-68. 2004
    ..This uncertainty applies to magnitude, and even direction of some of the feedbacks...
  25. ncbi request reprint Synthesis of effects in four Arctic subregions
    Terry V Callaghan
    Abisko Scientific Research Station, Sweden
    Ambio 33:469-73. 2004
    ....
  26. ncbi request reprint Uncertainties and recommendations
    Terry V Callaghan
    Abisko Scientific Research Station, Sweden
    Ambio 33:474-9. 2004
    ....
  27. ncbi request reprint Key findings and extended summaries
    Terry V Callaghan
    Abisko Scientific Research Station, Sweden
    Ambio 33:386-92. 2004