Research

Aquatic ecology, fisheries, and conservation

I am currently working or have worked on the following topics (including selected publications):

Impacts of climate change on aquatic organisms

Cline et al. 2019. Effects of warming climate and competition in the ocean for life-histories of Pacific salmon. Nature Ecology & Evolution 3:935-942.

Lindmark et al. 2019. Size-based ecological interactions drive food web responses to climate warming. Ecology Letters 22:778–786

Ohlberger et al. 2018. Past and projected impacts of river discharge variability on freshwater production in an anadromous fish. Freshwater Biology. 63:331–340.

Lindmark et al. 2018. Temperature-dependent body size effects determine population responses to climate warming. Ecology Letters 21:181-189.

Ohlberger et al. 2016. Population coherence and environmental impacts across spatial scales: a case study of Chinook salmon. Ecosphere 7(4):e01333.

Edeline et al. 2016. Pathogens trigger top‐down climate forcing on ecosystem dynamics. Oecologia 181:519–532.

Vindenes et al. 2014. Effects of climate change on trait-based dynamics of a top predator in freshwater ecosystems. American Naturalist 183(2):243–256.

Ohlberger 2013. Climate warming and ectotherm body size – from individual physiology to community ecology. Functional Ecology 27:991-1001.

Ohlberger et al. 2011. Temperature driven regime shifts in the dynamics of size-structured populations. American Naturalist 177:211-223.

Population demographic structure

Ohlberger et al. 2020. The reproductive value of large females: Consequences of shifts in demographic structure for population reproductive potential in Chinook salmon. Canadian Journal of Fisheries and Aquatic Sciences. 77:1292–1301.

Ohlberger et al. 2019. Resurgence of an apex marine predator and the decline in prey body size. Proceedings of the National Academy of Sciences.

DeFilippo et al. 2019. Demographic variation disrupts the evolutionary stability of alternative life histories in an exploited salmon population. Evolutionary Applications 12:214-229.

Ohlberger et al. 2018. Demographic changes in Chinook salmon across the Northeast Pacific Ocean. Fish and Fisheries. Early View.

Ohlberger et al. 2014. When phenology matters: Age-size truncation alters population response to trophic mismatch. Proceedings of the Royal Society B 281(1793):20140938.

Hidalgo et al. 2014. Contrasting evolutionary demography induced by fishing: the role of adaptive phenotypic plasticity. Ecological Applications 24(5):1101–1114.

Rouyer et al. 2012. Does increasing mortality change the response of fish populations to environmental fluctuations? Ecology Letters 15: 658–665.

Ohlberger et al. 2011. Stage-specific biomass overcompensation by juveniles in response to increased adult mortality in a wild fish population. Ecology 92:2175–2182.

Ohlberger et al. 2011. Pathogen-induced rapid evolution in a vertebrate life-history trait. Proceedings of the Royal Society B - Biological Sciences 278:35-41.

Fisheries ecology and management

Ohlberger et al. 2019. A Bayesian life-cycle model to estimate escapement at MSY in salmon based on limited information. Canadian Journal of Fisheries and Aquatic Sciences 76:299–307.

Potential impacts of mass mortality events on fish populations

Langangen et al. 2017. Cascading effects of mass mortality events in Arctic marine communities. Global Change Biology 23:283–292.

Langangen et al. 2017. The effects of oil spills on marine fish: Implications of spatial variation in natural mortality. Marine Pollution Bulletin 119:102–109.

Ohlberger J., and Ø. Langangen 2015. Population resilience to catastrophic mortality events during early life-stages. Ecological Applications, 25(5): 1348–1356.

Population dynamics and ecological interactions

Ohlberger et al. 2020. The importance of variation in offspring body size for stability in cannibalistic populations. Oikos 129:59-69.

Langangen et al. 2017. Cascading effects of mass mortality events in Arctic marine communities. Global Change Biology 23:283–292

Patin et al. 2016. Using a state-space population model to detect age-dependent species interactions. Canadian Journal of Fisheries and Aquatic Sciences 73: 1–8.

Ohlberger J., and Ø. Langangen 2015. Population resilience to catastrophic mortality events during early life-stages. Ecological Applications, 25(5): 1348–1356.

Ohlberger et al. 2014. Stochasticity and determinism: How density-independent and density-dependent processes affect population variability. PLoS ONE 9(6):e98940.

Ohlberger et al. 2012. Community-level consequences of cannibalism. American Naturalist 180(6):791-801.

Ohlberger et al. 2011. Stage-specific biomass overcompensation by juveniles in response to increased adult mortality in a wild fish population. Ecology 92:2175–2182.

Eco-physiological diversification in fishes

Ohlberger et al. 2013. Adaptive phenotypic diversification along a temperature-depth gradient. American Naturalist 182(3):359-373.

Ohlberger et al. 2008. Temperature-related physiological adaptations promote ecological divergence in a sympatric species pair of temperate freshwater fish, Coregonus spp. Functional Ecology 22:501-508.

Ohlberger et al. 2008. Physiological specialization by thermal adaptation drives ecological divergence in a sympatric fish species pair. Evolutionary Ecology Research 10: 1173-1185.

Swimming energetics and metabolic scaling

Ohlberger et al. 2012. Intraspecific temperature dependence of the scaling of metabolic rate with body mass in fishes and its ecological implications. Oikos 121:245–251.

Ohlberger et al. 2007. Effects of temperature, swimming speed and body mass on standard and active metabolic rate in vendace (Coregonus albula). Journal of Comparative Physiology B 177:905-916.

Ohlberger et al. 2006. Swimming efficiency and the influence of morphology on swimming costs in fishes. Journal of Comparative Physiology B 176:17-25.

Ohlberger et al. 2005. Modelling energetic costs of fish swimming. Journal of Experimental Zoology 303A:657-664.