Torbjørn Håkan Ergon

Image of Torbjørn Håkan Ergon
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Phone +47-22857311
Mobile phone +47-92602138
Room 3507
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Visiting address Blindernveien 31 0371 OSLO
Postal address Postboks 1066 Blindern 0316 OSLO
Other affiliations Department of Biosciences

As a population ecologist my research focuses on trying to understand variation in life-history traits and demographic rates within populations and link this to population level patterns and processes such as delayed density dependence. I use both theoretical and empirical approaches, and I am particularly interested in using and developing methods and statistical models to estimate (correlated) distributions of latent life-history traits within populations. This work is also highly relevant for selection processes in an evolutionary context, and I aim to contribute towards our understanding of the evolution of phenotypic plasticity in life-history traits.

Tags: Capture-recapture, Ecological statistics, Small rodents, Life-history theory, Seabirds, Population dynamics

Publications

  • Ergon, Torbjørn & Ergon, Rolf (2017). When three traits make a line: evolution of phenotypic plasticity and genetic assimilation through linear reaction norms in stochastic environments . Journal of Evolutionary Biology.  ISSN 1010-061X.  30(3), s 486- 500 . doi: 10.1111/jeb.13003 Full text in Research Archive
  • Liow, Lee Hsiang & Ergon, Torbjørn (2016). Fitting ancestral age-dependent speciation models to fossil data, In Warren D. Allmon & Margaret M. Yacobucci (ed.),  Species and Speciation in the Fossil Record.  University of Chicago Press.  ISBN 9780226377445.  Chapter 6.  s 198 - 216
  • Sengupta, Sagnik; Ergon, Torbjørn & Leinaas, Hans Petter (2016). Genotypic differences in embryonic life history traits of Folsomia quadrioculata (Collembola: Isotomidae) across a wide geographical range. Ecological Entomology.  ISSN 0307-6946.  41(1), s 72- 84 . doi: 10.1111/een.12270
  • Schnug, Lisbeth; Ergon, Torbjørn; Jakob, Lena; Scott-Fordsmand, Janeck J; Joner, Erik & Leinaas, Hans Petter (2015). Responses of earthworms to repeated exposure to three biocides Applied singly and as a mixture in an agricultural field. Science of the Total Environment.  ISSN 0048-9697.  505, s 223- 235 . doi: 10.1016/j.scitotenv.2014.09.089
  • Ergon, Torbjørn & Gardner, Beth (2014). Separating mortality and emigration: modelling space use, dispersal and survival with robust-design spatial capture–recapture data. Methods in Ecology and Evolution.  ISSN 2041-210X.  5(12), s 1327- 1336 . doi: 10.1111/2041-210X.12133
  • Ergon, Torbjørn; Ergon, Rolf; Begon, Mike; Telfer, Sandra & Lambin, Xavier (2011). Delayed density-dependent onset of spring reproduction in a fluctuating population of field voles. Oikos.  ISSN 0030-1299.  120(6), s 934- 940 . doi: 10.1111/j.1600-0706.2010.18983.x Full text in Research Archive
  • Knudsen, Endre; Linden, Andreas; Both, Christiaan; Jonzén, Niclas; Pulido, Francisco; Saino, Nicola; Sutherland, William; Bach, Lars; Coppack, Timothy; Ergon, Torbjørn; Gienapp, Phillip; Gill, Jennifer A.; Gordo, Oscar; Hedenström, Anders; Lehikoinen, Esa; Marra, Peter P.; Møller, Anders Pape; Nilsson, Anna; Péron, Guillaume; Ranta, Esa; Rubolini, Diego; Sparks, Tim H.; Spina, Fernando; Studds, Colin E; Sæther, Stein Are; Tryjanowski, Piotr & Stenseth, Nils Christian (2011). Challenging claims in the study of migratory birds and climate change. Biological Reviews.  ISSN 1464-7931.  86, s 928- 946 . doi: 10.1111/j.1469-185X.2011.00179.x
  • Reimers, Eigil; Lund, Steinar & Ergon, Torbjørn (2011). Vigilance and fright behaviour in the insular Svalbard reindeer (Rangifer tarandus platyrhynchus). Canadian Journal of Zoology.  ISSN 0008-4301.  89(8), s 753- 764 . doi: 10.1139/Z11-040
  • Hegel, Troy Michel; Mysterud, Atle; Ergon, Torbjørn; Loe, Leif Egil; Huettmann, Falk & Stenseth, Nils Christian (2010). Seasonal effects of Pacific-based climate on recruitment in a predator-limited large herbivore. Journal of Animal Ecology.  ISSN 0021-8790.  79(2), s 471- 482 . doi: 10.1111/j.1365-2656.2009.01647.x
  • Liow, Lee Hsiang; Skaug, Hans Julius; Ergon, Torbjørn H. & Schweder, Tore (2010). Global occurrence trajectories of microfossils: environmental volatility and the rise and fall of individual species. Paleobiology.  ISSN 0094-8373.  36(2), s 224- 252 . doi: 10.1666/08080.1
  • Ergon, Torbjørn; Yoccoz, Nigel G. & Nichols, James D. (2009). Estimating Latent Time of Maturation and Survival Costs of Reproduction in Continuous Time from Capture–Recapture Data, In David L. Thomson; Evan G. Cooch & Michael J. Conroy (ed.),  Modeling Demographic Processes In Marked Populations.  Springer.  ISBN 978-0-387-78150-1.  Section II.  s 173 - 197
  • Jonzén, Niclas; Lindén, Andreas; Ergon, Torbjørn; Knudsen, Endre; Vik, Jon Olav; Rubolini, Diego; Piacentini, Dario; Brinch, Christian; Spina, Fernando; Karlsson, Lennart; Stervander, Martin; Andersson, Arne; Waldenström, Jonas; Lehikoinen, Aleksi; Edvardsen, Erik; Solvang, Rune & Stenseth, Nils Christian (2008). Rapid advance of spring arrival dates in long-distance migratory birds, In Donald Kennedy (ed.),  Science Magazine's State of the Planet 2008-2009: with a Special Section on Energy and Sustainability.  Island Press.  ISBN 9781597264051.  Kapittel.  s 1959 - 1961
  • Ergon, Torbjørn (2007). Optimal onset of seasonal reproduction in stochastic environments: When should overwintering small rodents start breeding? . Ecoscience.  ISSN 1195-6860.  14, s 330- 346
  • Jonzén, Niclas; Ergon, Torbjørn; Lindén, Andreas & Stenseth, Nils Christian (2007). Bird migration and climate change: the general picture and beyond. Climate Research (CR).  ISSN 0936-577X.  35(1-2), s 177- 180 . doi: 10.3354/cr00724
  • Knudsen, Endre; Lindén, Andreas; Ergon, Torbjørn; Jonzén, Niclas; Vik, Jon Olav; Knape, Jonas; Røer, Jan Erik & Stenseth, Nils Christian (2007). Characterizing bird migration phenology using data from standardized monitoring at bird observatories. Climate Research (CR).  ISSN 0936-577X.  35(1-2), s 59- 77 . doi: 10.3354/cr00714
  • Saino, Nicola; Rubolini, Diego; Jonzén, Niclas; Ergon, Torbjørn; Montemaggiori, A; Stenseth, Nils Christian & Spina, Fernando (2007). Temperature and rainfall anomalies in Africa predict timing of spring migration in trans-Saharan migritory birds. Climate Research (CR).  ISSN 0936-577X.  35(1-2), s 123- 134
  • Jonzén, Niclas; Lindén, Andreas; Ergon, Torbjørn; Knudsen, Endre; Vik, Jon Olav; Rubolini, Diego; Piacentini, Dario; Brinch, Christian; Spina, Fernando; Karlsson, Lennart; Stervander, Martin; Andersson, Arne; Waldenström, Jonas; Lehikoinen, Aleksi; Edvardsen, Erik; Solvang, Rune & Stenseth, Nils Christian (2006). Rapid Advance of Spring Arrival Dates in Long-Distance Migratory Birds. Science.  ISSN 0036-8075.  312(5782), s 1959- 1961
  • Krafft, Bjørn A.; Kovacs, K.M.; Ergon, Torbjørn; Andersen, Magnus; Aars, Jon; Haug, T. & Lydersen, Christian (2006). Abundance of ringed seals (Pusa hispida) in the fjords of Spitsbergen, Svalbard, during the peak molting period. Marine mammal science.  ISSN 0824-0469.  22(2), s 394- 412
  • Krafft, Bjørn A.; Kovacs, Kit M.; Andersen, Magnus; Aars, Jon; Lydersen, Christian; Ergon, Torbjørn & Haug, tore (2006). Abundance of ringed seals (Pusa hispida) in the fjords of Spitsbergen, Svalbard, during the peak moulting period. Marine mammal science.  ISSN 0824-0469.  22(2), s 394- 412 . doi: 10.1111/j.1748-7692.2006.00035.x
  • Loe, Leif Egil; Bonenfant, Christophe; Mysterud, Atle; Gaillard, JM; Langvatn, R; Klein, F; Calenge, C; Ergon, Torbjørn Håkan; Pettorelli, Nathalie & Stenseth, Nils Christian (2005). Climate predictability and breeding phenology in red deer: timing and synchrony of rutting and calving in Norway and France. Journal of Animal Ecology.  ISSN 0021-8790.  74, s 579- 588 . doi: 10.1111/j.1365-2656.2005.00987.x
  • Cavanagh, Rachel; Lambin, Xavier; Ergon, Torbjørn; Bennett, Malcolm; Graham, Isla M.; Soolingen, Dick Van & Begon, Michael (2004). Disease dynamics in cyclic populations of field voles (Microtus agrestis): cowpox virus and vole tuberculosis (Mycobacterium microti). Proceedings of the Royal Society of London. Biological Sciences.  ISSN 0962-8452.  217(1541), s 859- 867
  • Ergon, Torbjørn; Speakman, John R.; Scantlebury, Michael; Cavanagh, Rachel & Lambin, Xavier (2004). Optimal body size and energy expenditure during winter: Why are voles smaller in declining populations?. American Naturalist.  ISSN 0003-0147.  163, s E442- E457 Full text in Research Archive
  • Speakman, John R.; Ergon, Torbjørn; Cavanagh, Rachel; Reid, K.; Scantlebury, Michael & Lambin, Xavier (2003). Resting and daily energy expenditures of free-living field voles are positively correlated but reflect extrinsic rather than intrinsic effects. Proceedings of the National Academy of Sciences of the United States of America.  ISSN 0027-8424.  100(24), s 14057- 14062
  • Cavanagh, Rachel; Begon, Michael; Bennett, Malcolm; Ergon, Torbjørn; Graham, Isla M.; Haas, Petra E. W. de; Hart, C. A.; Koedam, Marianne; Kremer, Kristin; Lambin, Xavier; Roholl, Paul & Soolingen, Dick van (2002). Mycobacterium microti Infection (Vole Tuberculosis) in Wild Rodent Populations. Journal of Clinical Microbiology.  ISSN 0095-1137.  s 3281- 3285
  • Ergon, Torbjørn; Lambin, Xavier; MacKinnon, James L.; Boonstra, Rudy & Stenseth, Nils Christian (2001). Mechanisms for delayed density-dependent reproductive traits in field voles, Microtus agrestis: the importance of inherited environmental effects. Oikos.  ISSN 0030-1299.  95, s 185- 197
  • Ergon, Torbjørn; Lambin, Xavier & Stenseth, Nils Christian (2001). Life-history traits of voles in a fluctuating population respond to the immediate environment. Nature.  ISSN 0028-0836.  411, s 1043- 1045

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  • Moghadam, Maunya D. & Ergon, Torbjørn (2015). Estimating the animal movements from lightbased data by using state-space modeling.
  • Arce Gonzalez, Fernando & Ergon, Torbjørn (2014). Spatiotemporal distribution of a small mammal assemblage at Finse: A methodological perspective.
  • Ergon, Torbjørn (2014). Ghosts, demons and elusive species; Adaptive multi-method occupancy sampling for monitoring of multiple species.
  • Hagelin, Jon Valbjørn; Ergon, Torbjørn & Slagsvold, Tore (2014). Change in distribution of Norwegian alpine breeding birds in response to global warming.
  • Areskoug, Veronika; Landa, Arild Magne; Eide, Nina Elisabeth; Flagstad, Øystein & Ergon, Torbjørn (2013). Reproductive biology of arctic fox (Alopex lagopus) under unlimited food resources and competitor exclusion : An experimental enclosure approach.
  • Ergon, Torbjørn (2013). Separating mortality and emigration with robust-design spatial capture-recapture data.
  • Ergon, Torbjørn (2012). Separating mortality and emigration: modelling space use, dispersal and survival with robust-design spatial capture-recapture data.
  • Ergon, Torbjørn (2012). Small rodent cycles and phenotypic plasticity.
  • Ergon, Torbjørn (2012). Variation in life-history, space-use and survival in a cyclic population of voles.
  • Ergon, Torbjørn & Gardner, Beth (2012). Separating mortality and emigration: Modeling space use, dispersal and survival with robust-design spatial capture-recapture data.
  • Ergon, Torbjørn (2011, 26. mai). Førkveld . [TV].  NRK 1.
  • Ergon, Torbjørn & Skaug, Hans Julius (2008). Estimating distributions of correlated individual life-history traits from mark-recapture data.
  • Ergon, Torbjørn (2007). Klimaendringer og Norsk natur; Pattedyr og fugler.
  • Ergon, Torbjørn; Yoccoz, Nigel G. & Nichols, James D. (2007). Estimating latent time of maturation and survival costs of reproduction in continuous time from capture-recapture data.
  • Jonzén, Niclas; Ergon, Torbjørn; Lindén, Andreas & Stenseth, Nils Christian (2007). Bird Migration and Climate Change - Introduction. Climate Research (CR).  ISSN 0936-577X.  35(1-2), s 1- 3 . doi: 10.3354/cr00710
  • Jonzén, Niclas; Lindén, Andreas; Ergon, Torbjørn; Knudsen, Endre; Vik, Jon Olav; Rubolini, Diego; Piacentini, Dario; Brinch, Christian; Spina, Fernando; Karlsson, Lennart; Stervander, Martin; Andersson, Arne; Waldenström, Jonas; Lehikoinen, Aleksi; Edvardsen, Erik; Solvang, Rune & Stenseth, Nils Christian (2007). Response to comment on "Rapid advance of spring arrival dates in long-distance migratory birds". Science.  ISSN 0036-8075.  315(5812), s 598- 598 . doi: 10.1126/science.1136920
  • Knudsen, Endre; Ergon, Torbjørn & Stenseth, Nils Christian (2007). Trekkfugler kvitrer om klima . Aftenposten (morgenutg. : trykt utg.).  ISSN 0804-3116.  s "Kultur" 4- "Kultur" 4
  • Ergon, Torbjørn (2006). Bird Migration and Climate Change.
  • Ergon, Torbjørn & Stenseth, Nils Christian (2006, 29. juni). Unikt samarbeid mellom forskere og fuglekikkere.  Uniforum.
  • Ergon, Torbjørn; Lambin, Xavier; Ergon, Rolf; Fairbairn, Jonathan P.; Graham, Isla M.; MacKinnon, James L. & Tellford, Gill R. (2005). DELAYED DENSITY-DEPENDENT ONSET OF SPRING REPRODUCTION IN FIELD VOLES.
  • Krafft, Bjørn Arne; Kovacs, Kit M.; Ergon, Torbjørn; Andersen, Magnus; Aars, Jon; Haug, Tore & Lydersen, Christian (2005). Abundance of ringed seals (Pusa hipida) in the fjords of Spitsbergen, Svalbard, during the peak moulting period.
  • Edvardsen, Erik; Røer, Jan Erik; Solvang, Rune; Ergon, Torbjørn; Rafoss, Trond & Klaveness, Geir (2004). Bestandsovervåking ved Standardisert Fangst og Ringmerking ved Fuglestasjonene.
  • Ergon, Torbjørn; Lambin, Xavier; Speakman, John R. & Stenseth, Nils Christian (2001). Life-history traits and energy expenditure of voles in a fluctuating population respond to the immediate environment.
  • Ergon, Torbjørn; Lambin, Xavier; MacKinnon, James L.; Boonstra, Rudy & Stenseth, Nils Christian (1999). Phase-dependent reproductive traits in spring cohorts of field voles (Microtus agrestis): the importance of environmentally inherited effects in a cyclic population.
  • Ergon, Torbjørn H. (1996). On the effects of wound induced plant resistance on Norwegian lemmings (<EM>Lemmus lemmus</EM>) : responses at the individual level and their ecological consequences.

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Published May 26, 2011 9:57 PM - Last modified Aug. 10, 2016 4:01 PM