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Trade-offs between fungal and bacterial respiration along gradients in temperature, nutrients and substrata: Experiments with stream derived microbial communities
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
Department of Bioscience, Aarhus University, Silkeborg, Denmark.
2012 (English)In: Fungal ecology, ISSN 1754-5048, Vol. 5, no 1, 46-52 p.Article in journal (Refereed) Published
Abstract [en]

We examined the effects of temperature, nutrients and substrata on microbial respiration rates. Leaves of alder and oak were incubated in a natural stream. Leaf discs were incubated in antibiotics to manipulate the ratio of fungi to bacteria with three treatments: antifungal, antibacterial, and combined antifungal and antibacterial treatment in addition to controls. Discs were subsequently incubated in different nutrient set-ups and temperature regimes. Significant effects of temperature, nutrients, microbial treatment and leaf type on respiration rates were found. However, temperature did not significantly add to the effect of eutrophication on microbial respiration rates. A stronger effect of temperature on fungal mediated respiration than on bacterial mediated respiration was found. In streams where leaf litter constitutes the main energy source, fungi constitute the dominant microbial decomposer. Our results indicate that increased temperature due to global warming might have serious implications for ecosystem functioning when leaf litter constitutes the main energy source.

Place, publisher, year, edition, pages
Elsevier, 2012. Vol. 5, no 1, 46-52 p.
Keyword [en]
Climate change, Eutrophication, Leaf litter, Microbial respiration, Running waters
National Category
URN: urn:nbn:se:liu:diva-71426DOI: 10.1016/j.funeco.2011.08.003ISI: 000299915700006OAI: diva2:448472
Available from: 2011-10-17 Created: 2011-10-17 Last updated: 2012-03-02

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Bergfur, Jenny
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Department of Water and Environmental StudiesFaculty of Arts and Sciences
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