The temperature dependence of microbial community respiration is amplified by changes in species interactions.
AuthorsGarcía, Francisca C.
O'Neill, Daniel Barrios
KAUST DepartmentRed Sea Research Center (RSRC)
Embargo End Date2023-08-02
Permanent link to this recordhttp://hdl.handle.net/10754/687490
MetadataShow full item record
AbstractRespiratory release of CO2 by microorganisms is one of the main components of the global carbon cycle. However, there are large uncertainties regarding the effects of climate warming on the respiration of microbial communities, owing to a lack of mechanistic, empirically tested theory that incorporates dynamic species interactions. We present a general mathematical model which predicts that thermal sensitivity of microbial community respiration increases as species interactions change from competition to facilitation (for example, commensalism, cooperation and mutualism). This is because facilitation disproportionately increases positive feedback between the thermal sensitivities of species-level metabolic and biomass accumulation rates at warmer temperatures. We experimentally validate our theoretical predictions in a community of eight bacterial taxa and show that a shift from competition to facilitation, after a month of co-adaptation, caused a 60% increase in the thermal sensitivity of respiration relative to de novo assembled communities that had not co-adapted. We propose that rapid changes in species interactions can substantially change the temperature dependence of microbial community respiration, which should be accounted for in future climate-carbon cycle models.
CitationGarcía, F. C., Clegg, T., O’Neill, D. B., Warfield, R., Pawar, S., & Yvon-Durocher, G. (2023). The temperature dependence of microbial community respiration is amplified by changes in species interactions. Nature Microbiology, 8(2), 272–283. https://doi.org/10.1038/s41564-022-01283-w
SponsorsThis work was supported by a European Research Council Starting Grant awarded to G.Y.-D. (ERC StG 677278 TEMPDEP). T.C. was supported by the QMEE CDT, funded by NERC grant no. NE/P012345/1. S.P. was funded by Leverhulme Fellowship RF-2020-653\2 and UK national NERC grants NE/M020843/1 and NE/S000348/1.
PublisherSpringer Science and Business Media LLC
CollectionsArticles; Red Sea Research Center (RSRC)
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