Decoupling of microbial carbon, nitrogen, and phosphorus cycling in response to extreme temperature events

Science Advances
Maria MooshammerAndreas Richter

Abstract

Predicted changes in the intensity and frequency of climate extremes urge a better mechanistic understanding of the stress response of microbially mediated carbon (C) and nutrient cycling processes. We analyzed the resistance and resilience of microbial C, nitrogen (N), and phosphorus (P) cycling processes and microbial community composition in decomposing plant litter to transient, but severe, temperature disturbances, namely, freeze-thaw and heat. Disturbances led temporarily to a more rapid cycling of C and N but caused a down-regulation of P cycling. In contrast to the fast recovery of the initially stimulated C and N processes, we found a slow recovery of P mineralization rates, which was not accompanied by significant changes in community composition. The functional and structural responses to the two distinct temperature disturbances were markedly similar, suggesting that direct negative physical effects and costs associated with the stress response were comparable. Moreover, the stress response of extracellular enzyme activities, but not that of intracellular microbial processes (for example, respiration or N mineralization), was dependent on the nutrient content of the resource through its effect on microbial physiolog...Continue Reading

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Citations

Jul 15, 2018·Applied and Environmental Microbiology·Joshua J RosnowAaron T Wright
Nov 13, 2020·Frontiers in Microbiology·Rachelle E BeattieKrassimira R Hristova
Mar 25, 2021·Scientific Reports·Hassan AnjileliAmir AghaKouchak
Apr 24, 2021·Nature Communications·Alan R PachecoDaniel Segrè
Oct 8, 2021·Environmental Science & Technology·Haochun ZhaoJianming Xu

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