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Umeå universitet
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Personalbild Ann-Kristin Bergström

Ann-Kristin Bergström

Min forskning berör effekter av miljö- och klimatförändringar på nordliga akvatiska ekosystems produktivitet och födovävsstruktur.

Kontakt

E-post
ann-kristin.bergstrom@umu.se
Telefon
090-786 95 44, 070-274 77 34

Verksam vid

Anknytning
Professor vid Institutionen för ekologi, miljö och geovetenskap
Plats
KB. H3, Linnaeus väg 6, Umeå, A3.38.21 Umeå universitet, 901 87 Umeå

Särskilt fokus inom min forskning ligger i att studera betydelsen av organiskt material (humusämnen) och näringsämnen (kväve och fosfor) för sjöars produktivitet och födovävsstruktur. Mina nuvarande forskningsprojekt handlar om hur globala klimatförändringar påverkar sjöars biogeokemi, och vilka eventuella konsekvenser biogeokemiska förändringar har på nordliga sjöars produktivitet och ekosystemtjänster. Vi utvärderar hur näringstillgång och N: P stökiometri i sjöar påverkas av förändringar i atmosfärisk kvävedeposition och klimat och vilka effekter detta får på näringsbegränsning av växtplankton och djurplankton, näringsregenerering och trofisk överföringseffektivitet, samt produktivitet i nordliga boreala och subarktiska sjöar.

Min forskning är kopplad till Arctic CIRC (Climate Impacts Research Centre)

2020
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.
2020
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.
2019
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
2019
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.
2019
Stream metabolism controls diel patterns and evasion of CO2 in Arctic streams
Global Change Biology
Rocher-Ros, Gerard; Sponseller, Ryan A.; Bergström, Ann-Kristin; et al.
2019
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.
2018
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.
2018
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.
2018
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
2018
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.
2018
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.
2018
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.
2017
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
2017
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
2017
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.
2017
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.
2016
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
2015
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.
2015
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.
2015
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.
2015
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.
2015
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.
2013
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.
2012
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.
2012
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.
2012
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.
2011
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
2011
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.
2011
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.
2010
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.
2010
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
2010
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
2009
Seasonal dynamics of bacteria and mixotrophic flagellates as related to input of allochthonous dissolved organic carbon
International association of theoretical and applied limnology, vol 30, pt 6: proceedings, Stuttgart: Schweizerbart 2009 : 923-928
Bergström, Ann-Kristin
2009
Seasonal dynamics of bacteria and mixotrophic flagellates as related to input of allochthonous dissolved organic carbon: internal and external sources to the CO2 emission from a subarctic lake
Verhandlungen / Internationale Vereinigung für Theoretische und Angewandte Limnologie, Vol. 30, (6) : 923-928
Bergström, Ann-Kristin
2009
Shifts in lake N:P stoichiometry and nutrient limitation driven by atmospheric nitrogen deposition
Science, Vol. 326 : 835-837
Elser, JJ; Andersen, T; Baron, J; et al.
2008
Composition and dispersal of riverine and lake phytoplankton communities in connected systems with different water retention times
Freshwater Biology, Vol. 53 : 2520–2529-
Bergström, Ann-Kristin; Bigler, Christian; Stensdotter, U.; et al.
2008
Phytoplankton responses to nitrogen and phosphorus enrichment in unproductive Swedish lakes along a gradient of atmospheric nitrogen deposition
Aquatic Biology, Vol. 4 : 55-64
Bergström, Ann-Kristin; Jonsson, Anders; Jansson, Mats
2007
Integrating aquatic carbon fluxes in a boreal catchment carbon budget
Journal of Hydrology, Vol. 334, (1-2) : 141-150
Jonsson, Anders; Algesten, Grete; Bergström, Ann-Kristin; et al.
2006
Atmospheric nitrogen deposition has caused nitrogen enrichment and eutrophication of lakes in the northern hemisphere
Global Change Biology, Vol. 12 : 1-9
Bergström, Ann-Kristin; Jansson, Mats
2006
Bacterioplankton growth and nutrient use efficiencies under variable organic carbon and inorganic phosphorus ratios
Microbial Ecology, Vol. 52, (2) : 258-264
Jansson, Mats; Bergström, Ann-Kristin; Lymer, David; et al.
2006
External control of bacterial community structure in lakes
Limnology and Oceanography, Vol. 51 : 339-342
Lindström, E S; Forslund, M; Algesten, G; et al.
2005
Contribution of sediment respiration to summer CO2 emission from boreal and subarctic lakes
Microbial Ecology, Vol. 50, (4) : 529-535
Algesten, Grete; Sobek, Sebastian; Bergström, Ann-Kristin; et al.
2005
Effects of atmospheric nitrogen deposition on nutrient limitation and phytoplankton biomass in unproductive Swedish lakes
Limnology & Oceanography, Vol. 50 : 987-994
Bergström, Ann-Kristin; Blomqvist, P; Jansson, Mats
2005
Community composition of bacterioplankton and cell transport in lakes in two different drainage areas
Aquat. Sci., Vol. 67 : 210-219
Lindström, E; Bergström, Ann-Kristin
2004
Role of lakes for organic carbon cycling in the boreal zone
Global Change Biology, Oxford: Blackwell Scientific 2004, Vol. 10, (1) : 141-147
Algesten, Grete; Sobek, Sebastian; Bergström, Ann-Kristin; et al.
2004
Emission of CO2 from hydroelectric reservoirs in northern Sweden
Archiv fur Hydrobiologie, Vol. 159 : 25-42
Bergström, Ann-Kristin; Algesten, G; Sobek, S; et al.
2004
A comparison of the carbon balances of a natural lake (L. Örträsket) and a hydroelectric reservoir (L. Skinnmuddselet) in northern Sweden
Water Research, Vol. 38 : 531-538
Åberg, J; Bergström, Ann-Kristin; Algesten, G; et al.
2003
Occurrence of mixotrophic flagellates in relation to bacterioplankton production, light regime and availability of inorganic nutrients in unproductive lakes with differing humic contents
Freshwater Biology, Vol. 48, (5) : 868-877
Bergström, Ann-Kristin; Jansson, Mats; Drakare, Stina; et al.
2003
Relationships between picophytoplankton and environmental variables in lakes along a gradient of water colour and nutrient content
Freshwater Biology, Vol. 48, (4) : 729-740
Drakare, Stina; Blomqvist, Peter; Bergström, Ann-Kristin; et al.
2003
The catchment and climate regulation of pCO2 in boreal lakes
Global Change Biology, Vol. 9, (4) : 630-641
Sobek, Sebastian; Algesten, Grete; Bergström, Ann-Kristin; et al.
Visa publikationer i DiVA

Jag är programansvarig för mastersprogrammet i geovetenskap.