Ann-Kristin Bergström

My research concerns effects of environmental and climate change on the productivity and the food web structure of northern aquatic ecosystems.

Research qualifications: Docent

0000-0001-5102-4289

Contact

ann-kristin.bergstrom@umu.se

+46 90 786 95 44, +46 70 274 77 34

Works at

Professor at Department of Ecology and Environmental Science

KBC-Fysiologihuset, Linnaeus väg 6, Umeå, A3 38 21 Umeå universitet, 901 87 Umeå

Special focus within my research lies within studying the importance of organic matter (humic substances) and nutrients (nitrogen and phosphorus) for lake ecosystem productivity and food web structure. My current research projects concern how global climate change are affecting lake water biogeochemistry, and what possible impacts these biogeochemical changes have on lake productivity and the ecosystem services of northern pristine lakes. We assess how nutrient availability and the N:P stoichiometry in lakes are affected by changes in atmospheric nitrogen deposition and by warming, and its effects on nutrient limitation of phytoplankton and zooplankton, nutrient regeneration and trophic transfer efficiencies, and productivity in northern boreal and subarctic lakes.

My research is linked to Arctic CIRC (Climate Impacts Research Centre)

Declining calcium concentration drives shifts toward smaller and less nutritious zooplankton in northern lakes

Global Change Biology, John Wiley & Sons 2024, Vol. 30, (3)

Bergström, Ann-Kristin; Creed, Irena F.; Palstev, Aleksey; et al.

Nutrient limitation masks the dissolved organic matter composition effects on bacterial metabolism in unproductive freshwaters

Limnology and Oceanography, John Wiley & Sons 2023, Vol. 68, (9) : 2059-2069

Berggren, Martin; Ye, Linlin; Sponseller, Ryan A.; et al.

Contrasting impacts of warming and browning on periphyton

Limnology and Oceanography Letters, John Wiley & Sons 2023, Vol. 8, (4) : 628-638

Callisto Puts, Isolde; Ask, Jenny; Myrstener, Maria; et al.

Widespread synchrony in phosphorus concentrations in northern lakes linked to winter temperature and summer precipitation

Limnology and Oceanography Letters, John Wiley & Sons 2023, Vol. 8, (4) : 639-648

Isles, Peter D. F.; Creed, Irena F.; Hessen, Dag O.; et al.

Experimental warming and browning influence autumnal pelagic and benthic invertebrate biomass and community structure

Freshwater Biology, John Wiley & Sons 2023, Vol. 68, (7) : 1224-1237

Koizumi, Shuntaro; Hamdan, Mohammed; Callisto Puts, Isolde; et al.

Browning affects pelagic productivity in northern lakes by surface water warming and carbon fertilization

Global Change Biology, John Wiley & Sons 2023, Vol. 29, (2) : 375-390

Puts, Isolde C.; Ask, Jenny; Deininger, Anne; et al.

Investigating the diet source influence on freshwater fish mercury bioaccumulation and fatty acids: Experiences from Swedish lakes and Chinese reservoirs

Ecotoxicology

Wu, Pianpian; Yan, Haiyu; Kainz, Martin J.; et al.

Biomass, community composition and N:P recycling ratios of zooplankton in northern high-latitude lakes with contrasting levels of N deposition and dissolved organic carbon

Freshwater Biology, John Wiley & Sons 2022, Vol. 67, (9) : 1508-1520

Bergström, Ann-Kristin; Lau, Danny C. P.; Isles, Peter D. F.; et al.

Resolving the Drivers of Algal Nutrient Limitation from Boreal to Arctic Lakes and Streams

Ecosystems (New York. Print), Springer-Verlag New York 2022, Vol. 25 : 1682-1699

Myrstener, Maria; Fork, Megan L.; Bergström, Ann-Kristin; et al.

An ecological and methodological assessment of benthic gross primary production in northern lakes

Ecosphere, John Wiley & Sons 2022, Vol. 13, (3)

Puts, Isolde; Bergström, Ann-Kristin; Verheijen, Hendricus; et al.

Landscape determinants of pelagic and benthic primary production in northern lakes

Global Change Biology, John Wiley & Sons 2022, Vol. 28, (23) : 7063-7077

Puts, Isolde C.; Ask, Jenny; Siewert, Matthias B.; et al.

Seasonal patterns in nutrient bioavailability in boreal headwater streams

Limnology and Oceanography, John Wiley & Sons 2022, Vol. 67, (5) : 1169-1183

Rulli, Mayra P. D.; Bergström, Ann-Kristin; Sponseller, Ryan A.; et al.

Effects of nitrogen enrichment on zooplankton biomass and N:P recycling ratios across a DOC gradient in northern-latitude lakes

Hydrobiologia, Springer 2021, Vol. 848, (21) : 4991-5010

Bergström, Ann-Kristin; Deininger, A.; Jonsson, Anders; et al.

Trade-offs Between Light and Nutrient Availability Across Gradients of Dissolved Organic Carbon Lead to Spatially and Temporally Variable Responses of Lake Phytoplankton Biomass to Browning

Ecosystems (New York. Print), Springer 2021, Vol. 24, (8) : 1837-1852

Isles, Peter D. F.; Creed, Irena F.; Jonsson, Anders; et al.

Lowered nutritional quality of plankton caused by global environmental changes

Global Change Biology, John Wiley & Sons 2021, Vol. 27, (23) : 6294-6306

Lau, Danny C. P.; Jonsson, Anders; Isles, Peter D. F.; et al.

Daphniaperformance on diets containing different combinations of high-quality algae, heterotrophic bacteria, and allochthonous particulate organic matter

Freshwater Biology, John Wiley & Sons 2021, Vol. 66, (1) : 157-168

Wenzel, Anja; Vrede, Tobias; Jansson, Mats; et al.

Hydrological controls on pelagic food structure: From shunts to chemostats as caused by runoff magnitudes and frequency of episodes

Hydrological Processes, John Wiley & Sons 2020, Vol. 34, (22) : 4150-4155

Bergström, Ann-Kristin

Changes in nutritional quality and nutrient limitation regimes of phytoplankton in response to declining N deposition in mountain lakes

Aquatic Sciences, Springer 2020, Vol. 82, (2)

Bergström, Ann-Kristin; Jonsson, Anders; Isles, Peter D. F.; et al.

Global changes may be promoting a rise in select cyanobacteria in nutrient-poor northern lakes

Global Change Biology, John Wiley & Sons 2020, Vol. 26, (9) : 4966-4987

Freeman, Erika C.; Creed, Irena F.; Jones, Blake; et al.

Does browning affect the identity of limiting nutrients in lakes?

Aquatic Sciences, Vol. 82, (2)

Isles, Peter D. F.; Jonsson, Anders; Creed, Irena F.; et al.

Stream metabolism controls diel patterns and evasion of CO₂ in Arctic streams

Global Change Biology, John Wiley & Sons 2020, Vol. 26, (3) : 1400-1413

Rocher-Ros, Gerard; Sponseller, Ryan A.; Bergström, Ann-Kristin; et al.

Light and nutrient control phytoplankton biomass responses to global change in northern lakes

Global Change Biology, John Wiley & Sons 2019, Vol. 25, (6) : 2021-2029

Bergström, Ann-Kristin; Karlsson, Jan

Pelagic food webs of humic lakes show low short-term response to forest harvesting

Ecological Applications, Ecological Society of America 2019, Vol. 29, (1)

Deininger, Anne; Jonsson, A.; Karlsson, J.; et al.

Terrestrial diet influences mercury bioaccumulation in zooplankton and macroinvertebrates in lakes with differing dissolved organic carbon concentrations

Science of the Total Environment, Vol. 669 : 821-832

Wu, Pianpian; Kainz, Martin; Akerblom, Staffan; et al.

Contrasting plankton stoichiometry and nutrient regeneration in northern arctic and boreal lakes

Aquatic Sciences, Springer 2018, Vol. 80, (2)

Bergström, Ann-Kristin; Karlsson, Jan; Karlsson, Daniel; et al.

Global change-driven effects on dissolved organic matter composition: Implications for food webs of northern lakes

Global Change Biology, John Wiley & Sons 2018, Vol. 24, (8) : 3692-3714

Creed, Irena F.; Bergström, Ann-Kristin; Trick, Charles G.; et al.

Recent Synchronous Declines in DIN:TP in Swedish Lakes

Global Biogeochemical Cycles, American Geophysical Union (AGU) 2018, Vol. 32, (2) : 208-225

Isles, Peter D. F.; Creed, Irena F.; Bergström, Ann-Kristin

Weak response of greenhouse gas emissions to whole lake N enrichment

Limnology and Oceanography, Vol. 63 : S340-S353

Klaus, Marcus; Bergström, Ann-Kristin; Jonsson, Anders; et al.

Greenhouse gas emissions from boreal inland waters unchanged after forest harvesting

Biogeosciences, Copernicus Gesellschaft 2018, Vol. 15, (18) : 5575-5594

Klaus, Marcus; Geibrink, Erik; Jonsson, Anders; et al.

Persistent nitrogen limitation of stream biofilm communities along climate gradients in the Arctic

Global Change Biology, John Wiley & Sons 2018, Vol. 24, (8) : 3680-3691

Myrstener, Maria; Rocher-Ros, Gerard; Burrows, Ryan M.; et al.

Nitrogen effects on the pelagic food web are modified by dissolved organic carbon

Oecologia, SPRINGER 2017, Vol. 184, (4) : 901-916

Deininger, Anne; Faithfull, Carolyn; Bergström, Ann-Kristin

Phytoplankton response to whole lake inorganic N fertilization along a gradient in dissolved organic carbon

Ecology, Vol. 98, (4) : 982-994

Deininger, Anne; Faithfull, Carolyn L.; Bergström, Ann-Kristin

Pelagic food web response to whole lake N fertilization

Limnology and Oceanography, Vol. 62, (4) : 1498-1511

Deininger, Anne; Faithfull, Carolyn L.; Karlsson, Jan; et al.

New insights on resource stoichiometry: assessing availability of carbon, nitrogen, and phosphorus to bacterioplankton

Biogeosciences, Vol. 14, (6) : 1527-1539

Soares, Ana R. A.; Bergström, Ann-Kristin; Sponseller, Ryan A.; et al.

The effects of temperature and resource availability on denitrification and relative N₂O production in boreal lake sediments

Journal of Environmental Sciences(China), Elsevier 2016, Vol. 47 : 82-90

Myrstener, Maria; Jonsson, Anders; Bergström, Ann-Kristin

Toward an ecologically meaningful view of resource stoichiometry in DOM-dominated aquatic systems

Journal of Plankton Research, Vol. 37, (3) : 489-499

Berggren, Martin; Sponseller, Ryan A.; Soares, Ana R. Alves; et al.

N-limited consumer growth and low nutrient regeneration N:P ratios in lakes with low N deposition

Ecosphere, Vol. 6, (1)

Bergström, Ann-Kristin; Karlsson, Daniel; Karlsson, Jan; et al.

Food web efficiency differs between humic and clear water lake communities in response to nutrients and light

Oecologia, Vol. 177, (3) : 823-835

Faithfull, Carolyn L.; Mathisen, Peter; Wenzel, Anja; et al.

Terrestrial organic matter input suppresses biomass production in lake ecosystems

Ecology, Ecological Society of America 2015, Vol. 96, (11) : 2870-2876

Karlsson, Jan; Bergström, Ann-Kristin; Byström, Pär; et al.

The influence of dissolved organic carbon on primary production in northern lakes

Limnology and Oceanography, John Wiley & Sons 2015, Vol. 60, (4) : 1276-1285

Seekell, David A.; Lapierre, Jean-Francois; Ask, Jenny; et al.

Nitrogen deposition and warming – effects on phytoplankton nutrient limitation in subarctic lakes

Global Change Biology, Hoboken, NJ: Wiley-Blackwell 2013, Vol. 19, (8) : 2557-2568

Bergström, Ann-Kristin; Faithfull Mathisen, Carolyn; Karlsson, Daniel; et al.

Transfer of bacterial production based on labile carbon to higher trophic levels in an oligotrophic pelagic system

Canadian Journal of Fisheries and Aquatic Sciences, Montreal: Canadian Science Publishing 2012, Vol. 69, (1) : 85-93

Faithfull, Carolyn; Huss, Magnus; Vrede, Tobias; et al.

Survival, growth and reproduction of Daphnia galeata feeding on single and mixed Pseudomonas and Rhodomonas diets

Freshwater Biology, Vol. 57, (4) : 835-846

Wenzel, Anja; Bergström, Ann-Kristin; Jansson, Mats; et al.

Poor direct exploitation of terrestrial particulate organic material from peat layers by Daphnia galeata.

Canadian Journal of Fisheries and Aquatic Sciences, Vol. 69, (11) : 1870-1880

Wenzel, Anja; Bergström, Ann-Kristin; Jansson, Mats; et al.

Effects of nutrients and physical lake characteristics on bacterial and phytoplankton production: A meta-analysis

Limnology and Oceanography, American Society of Limnology and Oceanography (ASLO) 2011, Vol. 56, (5) : 1703-1713

Faithfull, Carolyn; Bergström, Ann-Kristin; Vrede, Tobias

Bottom–up carbon subsidies and top–down predation pressure interact to affect aquatic food web structure

Oikos, John Wiley 2011, Vol. 120, (2) : 311-320

Faithfull, Carolyn; Huss, Magnus; Vrede, Tobias; et al.

Testing the light: nutrient hypothesis in an oligotrophic boreal lake

Ecosphere, Ecological Society of America 2011, Vol. 2, (11) : 123-

Faithfull, Carolyn; Wenzel, Anja; Vrede, Tobias; et al.

Lake secondary production fueled by rapid transfer of low molecular weight organic carbon from terrestrial sources to aquatic consumers

Ecology Letters, Vol. 13, (7) : 870-880

Berggren, Martin; Ström, L; Laudon, H; et al.

The use of TN:TP and DIN:TP ratios as indicators for phytoplankton nutrient limitation in oligotrophic lakes affected by N deposition

Aquatic Sciences, Vol. 72, (3) : 277-281

Bergström, Ann-Kristin

Pelagic energy mobilization across crossed gradients of phosphorus and dissolved organic carbon in a chemostat experiment

INTERNATIONAL ASSOCIATION OF THEORETICAL AND APPLIED LIMNOLOGY, VOL 30, PT 9 : 1411-1415

Faithfull, Carolyn; Bergström, Ann-Kristin; Vrede, Tobias

View publications in DiVA

Research groups

Group member

Biogeochemistry

Research projects

1 January 2024 until 31 December 2026

Predicting and monitoring alpine lake productivity in a changing climate

1 January 2021 until 31 December 2024

Global change depletes pelagic food webs in northern lakes (Web4Food)

1 January 2017 until 31 December 2022

Climate change induced regime shifts in Northern lake ecosystems

I am the director of the Master´s programme in Earth Science.

Published: 16 Dec, 2019

Discussions on sustainability, health and ecosystems at UAF2019

Lowered nutritional quality of plankton caused by global environmental changes

Global environmental changes reduce the levels of omega-3 polyunsaturated fatty acids in plankton of northern lakes, thereby lowering their supply to wildlife and humans.

This video summarizes the main findings of the research article: Lau, D. C. P., Jonsson, A., Isles, P. D., Creed, I. F., & Bergström, A.-K. (2021). Lowered nutritional quality of plankton caused by global environmental changes. Global Change Biology. https://doi.org/10.1111/gcb.15887

How terrestrial affects aquatic: Answers from northern lakes

This video summarizes the main findings of the research article:

Isolde Callisto Puts, Jenny Ask, Matthias B. Siewert, Ryan A. Sponseller, Dag O. Hessen, Ann-Kristin Bergström (2022). Landscape determinants of pelagic and benthic primary production in northern lakes. Global change biology.

https://doi.org/10.1111/gcb.16409