A positive feedback to climate change: The effect of temperature on the respiration of key wood-decomposing fungi does not decline with time.

Autor: Journeaux KL; Geography, Faculty of Environment, Science and Economy, University of Exeter, Exeter, UK., Boddy L; School of Biosciences, Cardiff University, Cardiff, UK., Rowland L; Geography, Faculty of Environment, Science and Economy, University of Exeter, Exeter, UK., Hartley IP; Geography, Faculty of Environment, Science and Economy, University of Exeter, Exeter, UK.
Jazyk: angličtina
Zdroj: Global change biology [Glob Chang Biol] 2024 Mar; Vol. 30 (3), pp. e17212.
DOI: 10.1111/gcb.17212
Abstrakt: Heterotrophic soil microorganisms are responsible for ~50% of the carbon dioxide released by respiration from the terrestrial biosphere each year. The respiratory response of soil microbial communities to warming, and the control mechanisms, remains uncertain, yet is critical to understanding the future land carbon (C)-climate feedback. Individuals of nine species of fungi decomposing wood were exposed to 90 days of cooling to evaluate the medium-term effect of temperature on respiration. Overall, the effect of temperature on respiration increased in the medium term, with no evidence of compensation. However, the increasing effect of temperature on respiration was lost after correcting for changes in biomass. These results indicate that C loss through respiration of wood-decomposing fungi will increase beyond the direct effects of temperature on respiration, potentially promoting greater C losses from terrestrial ecosystems and a positive feedback to climate change.
(© 2024 The Authors. Global Change Biology published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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