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Trade-offs between fungal and bacterial respiration along gradients in temperature, nutrients and substrata: Experiments with stream derived microbial communities
Linköpings universitet, Institutionen för tema, Tema vatten i natur och samhälle. Linköpings universitet, Filosofiska fakulteten.
Department of Bioscience, Aarhus University, Silkeborg, Denmark.
2012 (engelsk)Inngår i: Fungal ecology, ISSN 1754-5048, E-ISSN 1878-0083, Vol. 5, nr 1, s. 46-52Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
Elsevier, 2012. Vol. 5, nr 1, s. 46-52
Emneord [en]
Climate change, Eutrophication, Leaf litter, Microbial respiration, Running waters
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-71426DOI: 10.1016/j.funeco.2011.08.003ISI: 000299915700006OAI: oai:DiVA.org:liu-71426DiVA, id: diva2:448472
Tilgjengelig fra: 2011-10-17 Laget: 2011-10-17 Sist oppdatert: 2017-12-08

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