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@umu.seEmail 2

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

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

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

Food web efficiency differs between humic and clear water lake communities in response to nutrients and light
Oecologia, 177(3): 823-835

2015

-

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

Toward an ecologically meaningful view of resource stoichiometry in DOM-dominated aquatic systems
Journal of Plankton Research, 37(3): 489-499

2015

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

N-limited consumer growth and low nutrient regeneration N:P ratios in lakes with low N deposition
Ecosphere, 6(1)

2015

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

The influence of dissolved organic carbon on primary production in northern lakes
Limnology and Oceanography, 60(4): 1276-1285

2015

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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

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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

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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

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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

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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

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Page Editor: Elisabet Carlborg
2010-11-09

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