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An unexpected role for mixotrophs in the response of peatland carbon cycling to climate warming

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An unexpected role for mixotrophs in the response of peatland carbon cycling to climate warming. / Jassey, Vincent E J; Signarbieux, Constant; Hättenschwiler, Stephan; Bragazza, Luca; Buttler, Alexandre; Delarue, Frédéric; Fournier, Bertrand; Gilbert, Daniel; Laggoun-Défarge, Fatima; Lara, Enrique; T. E. Mills, Robert; Mitchell, Edward A D; Payne, Richard J.; Robroek, Bjorn J M.

In: Scientific Reports, Vol. 5, 16931, 25.11.2015.

Research output: Contribution to journalArticle

Harvard

Jassey, VEJ, Signarbieux, C, Hättenschwiler, S, Bragazza, L, Buttler, A, Delarue, F, Fournier, B, Gilbert, D, Laggoun-Défarge, F, Lara, E, T. E. Mills, R, Mitchell, EAD, Payne, RJ & Robroek, BJM 2015, 'An unexpected role for mixotrophs in the response of peatland carbon cycling to climate warming', Scientific Reports, vol. 5, 16931. https://doi.org/10.1038/srep16931

APA

Jassey, V. E. J., Signarbieux, C., Hättenschwiler, S., Bragazza, L., Buttler, A., Delarue, F., ... Robroek, B. J. M. (2015). An unexpected role for mixotrophs in the response of peatland carbon cycling to climate warming. Scientific Reports, 5, [16931]. https://doi.org/10.1038/srep16931

Vancouver

Jassey VEJ, Signarbieux C, Hättenschwiler S, Bragazza L, Buttler A, Delarue F et al. An unexpected role for mixotrophs in the response of peatland carbon cycling to climate warming. Scientific Reports. 2015 Nov 25;5. 16931. https://doi.org/10.1038/srep16931

Author

Jassey, Vincent E J ; Signarbieux, Constant ; Hättenschwiler, Stephan ; Bragazza, Luca ; Buttler, Alexandre ; Delarue, Frédéric ; Fournier, Bertrand ; Gilbert, Daniel ; Laggoun-Défarge, Fatima ; Lara, Enrique ; T. E. Mills, Robert ; Mitchell, Edward A D ; Payne, Richard J. ; Robroek, Bjorn J M. / An unexpected role for mixotrophs in the response of peatland carbon cycling to climate warming. In: Scientific Reports. 2015 ; Vol. 5.

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@article{9e7705f5054841a2921860ab1d62baf2,
title = "An unexpected role for mixotrophs in the response of peatland carbon cycling to climate warming",
abstract = "Mixotrophic protists are increasingly recognized for their significant contribution to carbon (C) cycling. As phototrophs they contribute to photosynthetic C fixation, whilst as predators of decomposers, they indirectly influence organic matter decomposition. Despite these direct and indirect effects on the C cycle, little is known about the responses of peatland mixotrophs to climate change and the potential consequences for the peatland C cycle. With a combination of field and microcosm experiments, we show that mixotrophs in the Sphagnum bryosphere play an important role in modulating peatland C cycle responses to experimental warming. We found that five years of consecutive summer warming with peaks of +2 to +8°C led to a 50{\%} reduction in the biomass of the dominant mixotrophs, the mixotrophic testate amoebae (MTA). The biomass of other microbial groups (including decomposers) did not change, suggesting MTA to be particularly sensitive to temperature. In a microcosm experiment under controlled conditions, we then manipulated the abundance of MTA, and showed that the reported 50{\%} reduction of MTA biomass in the field was linked to a significant reduction of net C uptake (-13{\%}) of the entire Sphagnum bryosphere. Our findings suggest that reduced abundance of MTA with climate warming could lead to reduced peatland C fixation.",
author = "Jassey, {Vincent E J} and Constant Signarbieux and Stephan H{\"a}ttenschwiler and Luca Bragazza and Alexandre Buttler and Fr{\'e}d{\'e}ric Delarue and Bertrand Fournier and Daniel Gilbert and Fatima Laggoun-D{\'e}farge and Enrique Lara and {T. E. Mills}, Robert and Mitchell, {Edward A D} and Payne, {Richard J.} and Robroek, {Bjorn J M}",
note = "This content is made available by the publisher under a Creative Commons Attribution Licence. This means that a user may copy, distribute and display the resource providing that they give credit. Users must adhere to the terms of the licence.",
year = "2015",
month = "11",
day = "25",
doi = "10.1038/srep16931",
language = "English",
volume = "5",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Springer Nature",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - An unexpected role for mixotrophs in the response of peatland carbon cycling to climate warming

AU - Jassey, Vincent E J

AU - Signarbieux, Constant

AU - Hättenschwiler, Stephan

AU - Bragazza, Luca

AU - Buttler, Alexandre

AU - Delarue, Frédéric

AU - Fournier, Bertrand

AU - Gilbert, Daniel

AU - Laggoun-Défarge, Fatima

AU - Lara, Enrique

AU - T. E. Mills, Robert

AU - Mitchell, Edward A D

AU - Payne, Richard J.

AU - Robroek, Bjorn J M

N1 - This content is made available by the publisher under a Creative Commons Attribution Licence. This means that a user may copy, distribute and display the resource providing that they give credit. Users must adhere to the terms of the licence.

PY - 2015/11/25

Y1 - 2015/11/25

N2 - Mixotrophic protists are increasingly recognized for their significant contribution to carbon (C) cycling. As phototrophs they contribute to photosynthetic C fixation, whilst as predators of decomposers, they indirectly influence organic matter decomposition. Despite these direct and indirect effects on the C cycle, little is known about the responses of peatland mixotrophs to climate change and the potential consequences for the peatland C cycle. With a combination of field and microcosm experiments, we show that mixotrophs in the Sphagnum bryosphere play an important role in modulating peatland C cycle responses to experimental warming. We found that five years of consecutive summer warming with peaks of +2 to +8°C led to a 50% reduction in the biomass of the dominant mixotrophs, the mixotrophic testate amoebae (MTA). The biomass of other microbial groups (including decomposers) did not change, suggesting MTA to be particularly sensitive to temperature. In a microcosm experiment under controlled conditions, we then manipulated the abundance of MTA, and showed that the reported 50% reduction of MTA biomass in the field was linked to a significant reduction of net C uptake (-13%) of the entire Sphagnum bryosphere. Our findings suggest that reduced abundance of MTA with climate warming could lead to reduced peatland C fixation.

AB - Mixotrophic protists are increasingly recognized for their significant contribution to carbon (C) cycling. As phototrophs they contribute to photosynthetic C fixation, whilst as predators of decomposers, they indirectly influence organic matter decomposition. Despite these direct and indirect effects on the C cycle, little is known about the responses of peatland mixotrophs to climate change and the potential consequences for the peatland C cycle. With a combination of field and microcosm experiments, we show that mixotrophs in the Sphagnum bryosphere play an important role in modulating peatland C cycle responses to experimental warming. We found that five years of consecutive summer warming with peaks of +2 to +8°C led to a 50% reduction in the biomass of the dominant mixotrophs, the mixotrophic testate amoebae (MTA). The biomass of other microbial groups (including decomposers) did not change, suggesting MTA to be particularly sensitive to temperature. In a microcosm experiment under controlled conditions, we then manipulated the abundance of MTA, and showed that the reported 50% reduction of MTA biomass in the field was linked to a significant reduction of net C uptake (-13%) of the entire Sphagnum bryosphere. Our findings suggest that reduced abundance of MTA with climate warming could lead to reduced peatland C fixation.

UR - http://www.scopus.com/inward/record.url?scp=84948150526&partnerID=8YFLogxK

U2 - 10.1038/srep16931

DO - 10.1038/srep16931

M3 - Article

VL - 5

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

M1 - 16931

ER -