Ann-Kristin Bergström

Contact Information

Position:

Senior lecturer

personbild

Works at:

Ecology and Environmental Sciences

Address:

Umeå universitet
SE-901 87 Umeå
Sverige

Visiting Address:

KBC-huset, plan 3, Linnaeus väg 6, Umeå

Tel:

+46 90 786 95 44

Mobile Phone:

+46 70 274 77 34

Email:

ann-kristin.bergstrom@emg.umu.seEmail 1

ann-kristin.bergstrom@umu.seEmail 2

Lync:

Get in touch via Lync

Web Page:

http://www.emg.umu.se/english/about-the-department/staff/bergstrom-ann-kristin Web Page
http://www.emg.umu.se/om-institutionen/personal/bergstrom-ann-kristin Web Page

Research

My research focus on the ecology of pelagic food webs (including zooplankton, phytoplankton and bacterioplankton) in freshwater ecosystems. 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. One research project studies if there are regional differences in nutrient limitation of phytoplankton growth in Swedish unproductive lakes and if such differences can be related to the atmospheric nitrogen (N) input. The project is also investigating if atmospheric N-input affects the productivity and the species composition and the succession of phytoplankton in Swedish lakes. Another project studies how the transfer efficiency of carbon and nutrients from bacteria and phytoplankton to zooplankton depend on food chain structure and carbon:nutrient stoichiometry of energy mobilizers and consumers.

Publications

Author

Title

Year sorteringsordning

Fulltext

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

Nitrogen deposition and warming  – effects on phytoplankton nutrient limitation in subarctic lakes
Global Change Biology, 19(8): 2557-2568

2013

-

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

Survival, growth and reproduction of Daphnia galeata feeding on single and mixed Pseudomonas and Rhodomonas diets
Freshwater Biology, 57(4): 835-846

2012

-

Faithfull, Carolyn
Huss, Magnus
Vrede, Tobias; 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, 69(1): 85-93

2012

-

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, 69(11): 1870-1880

2012

-

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

Bottom–up carbon subsidies and top–down predation pressure interact to affect aquatic food web structure
Oikos, 120(2): 311-320

2011

-

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

Testing the light: nutrient hypothesis in an oligotrophic boreal lake
Ecosphere, 2(11): 123-

2011

Download

Faithfull, Carolyn
Bergström, Ann-Kristin
Vrede, Tobias

Effects of nutrients and physical lake characteristics on bacterial and phytoplankton production: A meta-analysis
Limnology and Oceanography, 56(5): 1703-1713

2011

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Faithfull, Carolyn
Bergström, Ann-Kristin
Vrede, Tobias

Pelagic energy mobilization across crossed gradients of phosphorus and dissolved organic carbon in a chemostat experiment
Verhandlungen / Internationale Vereinigung für Theoretische und Angewandte Limnologie, 30(9): 1411-1415

2010

-

Bergström, Ann-Kristin

The use of TN:TP and DIN:TP ratios as indicators for phytoplankton nutrient limitation in oligotrophic lakes affected by N deposition
Aquatic Sciences, 72(3): 277-281

2010

-

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

Lake secondary production fueled by rapid transfer of low molecular weight organic carbon from terrestrial sources to aquatic consumers
Ecology Letters, 13(7): 870-880

2010

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Page Editor: Elisabet Carlborg
2010-11-09

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