Jan Ohlberger
Research topics:
Population and community dynamics: The dynamics of structured populations with respect to intra- and interspecific interactions such as predation, cannibalism, competition, and the effect of abiotic environmental factors, specifically temperature.
Life-history traits: Selective pressures shaping life-history evolution, for instance the evolutionary response of populations to increased mortality rates caused by exploitation or pathogens.
Ecological diversification: Ecological factors facilitating evolutionary divergence and the traits involved in adaptive diversification, particularly metabolic adaptation along environmental temperature gradients.
Metabolic scaling: Effects of temperature on the scaling of metabolic rate with body mass, and how fish species differ in metabolic scaling exponents.
Swimming energetics: The energetics of fish swimming, especially the effects of temperature, body size and morphology on standard and active metabolic rates.
Research projects:
Modelling ecosystems under climate change: Windermere as a model lake system (completed)
Collaborations:
Applying a new demographic framework to understand and project consequences of climate change in size- and age-structured populations (starting 2013)
Risk, endogenous preferences, and investment behavior in Norwegian fisheries (starting 2013)
Citation metrics on google scholar
Publications
- Mehner, Thomas; Busch, Susan; Clemmesen, Catriona; Helland, Ingeborg Palm; Hölcker, Franz; Ohlberger, Jan & Peck, Myron A. (2012). Ecological commonalities among pelagic fishes: comparison of freshwater ciscoes and marine herring and sprat. Marine Biology. ISSN 0025-3162. 159, s 2583- 2603 . doi: 10.1007/s00227-012-1922-9
- Ohlberger, Jan; Langangen, Øystein; Stenseth, Nils Christian & Vøllestad, Leif Asbjørn (2012). Community-Level Consequences of Cannibalism. American Naturalist. ISSN 0003-0147. 180(6), s 791- 801 . doi: 10.1086/668080
- Ohlberger, Jan; Mehner, Thomas; Staaks, Georg & Hölker, F. (2012). Intraspecific temperature dependence of the scaling of metabolic rate with body mass in fishes and its ecological implications. Oikos. ISSN 0030-1299. 121, s 245- 251 . doi: 10.1111/j.1600-0706.2011.19882.x
- Ohlberger, Jan; Villar, Jaime Otero; Edeline, Eric; Winfield, Ian J.; Stenseth, Nils Christian & Vøllestad, Leif Asbjørn (2012). Biotic and abiotic effects on cohort size distributions in fish. Oikos. ISSN 0030-1299. . doi: 10.1111/j.1600-0706.2012.19858.x
- Langangen, Øystein; Edeline, Eric; Ohlberger, Jan; Winfield, Ian J.; Fletcher, Janice M.; James, J. Ben; Stenseth, Nils Christian & Vøllestad, Leif Asbjørn (2011). Six decades of pike and perch population dynamics in Windermere. Fisheries Research. ISSN 0165-7836. 109, s 131- 139 . doi: 10.1016/j.fishres.2011.01.029
- Ohlberger, Jan; Edeline, Eric; Vøllestad, Leif Asbjørn; Stenseth, Nils Christian & Claessen, David (2011). Temperature-Driven Regime Shifts in the Dynamics of Size-Structured Populations. American Naturalist. ISSN 0003-0147. 177(2), s 211- 223 . doi: 10.1086/657925
- Ohlberger, Jan; Langangen, Øystein; Edeline, Eric; Claessen, David; Winfield, Ian J.; Stenseth, Nils Christian & Vøllestad, Leif Asbjørn (2011). Stage-specific biomass compensation by juveniles in response to increased adult mortality in a wild fish population. Ecology. ISSN 0012-9658. 92(12), s 2175- 2182 . doi: 10.1890/11-0410.1
- Ohlberger, Jan; Langangen, Øystein; Edeline, Eric; Olsen, Esben Moland; Winfield, Ian J.; Fletcher, Janice M.; James, J. Ben; Stenseth, Nils Christian & Vøllestad, Leif Asbjørn (2011). Pathogen-induced rapid evolution in a vertebrate life-history trait. Proceedings of the Royal Society of London. Biological Sciences. ISSN 0962-8452. 278(1702), s 35- 41 . doi: 10.1098/rspb.2010.0960
- Ohlberger, Jan (2012). Biomass overcompensation revealed by long-term time series data from Windermere.
- Ohlberger, Jan (2012). Cannibalism effects on species interactions and community structure.
- Ohlberger, Jan (2012). Community-level consequences of cannibalism.
- Ohlberger, Jan (2012). Ecological and evolutionary responses to size-selective mortality caused by a disease outbreak in Windermere perch.
- Ohlberger, Jan (2012). Ecological and evolutionary responses to size-selective mortality – a disease outbreak in Windermere perch as a large-scale natural experiment.
- Rouyer, Tristan Alexander; Sadykov, Alexander; Ohlberger, Jan & Stenseth, Nils Christian (2012). Does increasing mortality change the response of fish populations to environmental fluctuations?. Ecology Letters. ISSN 1461-023X. 15(7), s 658- 665 . doi: 10.1111/j.1461-0248.2012.01781.x
- Ohlberger, Jan (2011). Stage-specific biomass overcompensation by juveniles in response to increased adult mortality.
- Ohlberger, Jan; Edeline, Eric; Vøllestad, Leif Asbjørn; Stenseth, Nils Christian & Claessen, David (2011, 10. januar). PR: Temperature Driven Regime Shifts in the Dynamics of Size-Structured Populations . [Internett]. American Society of Naturalists.
- Ohlberger, Jan (2010). An empirically calibrated model of adaptive diversification along an environmental temperature‐depth gradient.
- Ohlberger, Jan (2010). Temperature-driven regime shifts in size-structured populations.
- Ohlberger, Jan (2009). A physiological pathway in coregonid speciation.