Differential temperature sensitivity of intracellular metabolic processes and extracellular soil enzyme activities

Abstract ∘ C to acclimatize the microbial communities to different thermal regimes for 60 d before measuring potential activities of β ∘ C). A higher pre-incubation temperature decreased the soil pH and C/N ratio and decreased β β ∼ ∘ C) for the mesophilic soil community. However, we found that the intracellular and extracellular steps differ in their temperature sensitivity, and this observation differs depending on the range of temperature used for Q 10 ∘ C intracellular and extracellular processes show equal temperature sensitivity, but between 15 and 26 ∘ C intracellular metabolic processes were more temperature sensitive than extracellular enzyme activity, and between 26 and 37 ∘ C extracellular enzyme activity was more temperature sensitive than intracellular metabolic processes. This result implies that depolymerization of higher molecular weight carbon is more sensitive to temperature changes at higher temperatures (e.g. higher temperatures on extremely warm days), but the respiration of the generated monomers is more sensitive to temperature changes at moderate temperatures (e.g. mean daily maximum soil temperature). However, studies using multiple soil types and a greater range of pre-incubation temperatures are required to generalize our results. Nevertheless, since climate change predictions currently indicate that there will be a greater frequency and severity of hot summers and heatwaves, it is possible that global warming may reduce the importance of extracellular depolymerization relative to intracellular metabolic processes as the rate-limiting step of soil organic matter mineralization. We conclude that extracellular and intracellular steps are not equally sensitive to changes in soil temperature and that the previous temperature a soil is exposed to may influence the potential activity, but not temperature sensitivity, of extracellular and intracellular processes.

Angaben zum Objekt

• Standort: Deutsche Nationalbibliothek Frankfurt am Main
• Umfang: Online-Ressource
• Sprache: Englisch

Verweise und Beziehungen

• Erschienen in: Differential temperature sensitivity of intracellular metabolic processes and extracellular soil enzyme activities ; volume:20 ; number:11 ; year:2023 ; pages:2207-2219 ; extent:13 ; Biogeosciences ; 20, Heft 11 (2023), 2207-2219 (gesamt 13)

Klassifikation und Themen

• Klassifikation: Biowissenschaften, Biologie

Beteiligte, Orts- und Zeitangaben

• Urheber: Adekanmbi, Adetunji Alex ; Dale, Laurence ; Shaw, Liz ; Sizmur, Tom

Weitere Informationen

• DOI: 10.5194/bg-20-2207-2023
• URN: urn:nbn:de:101:1-2023062204341898584435
• Rechteinformation: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Letzte Aktualisierung: 14.08.2025, 10:52 MESZ