Skip to main content

Advertisement

Log in

Freezing–thawing cycles affect organic matter decomposition in periglacial maritime Antarctic soils

  • Research
  • Published:
Biogeochemistry Aims and scope Submit manuscript

Abstract

Antarctic King George Island is the fastest-warming area in the Southern Hemisphere. Organic matter inputs are scarce in this area, as they are derived from lichens, mosses, avian faeces, and minor inputs from two vascular plant species, Deschampsia antarctica É. Desv. and Colobanthus quitensis (Kunth) Bartl. Here, we examined the effects of freezing and thawing (FT) cycles on the priming effect (PE). We hypothesised that soil microorganisms preferentially use freeze-preserved soil organic carbon (SOC) exposed after thawing as an important energy source, resulting in intense PE. Two soils with contrasting clay contents were characterised by attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy and incubated with and without 13C-glucose for 21 d. CO2 and 13CO2 were recorded from soil (i) without FT, (ii) one FT, and (iii) three FT cycles (− 18/12 °C). SOC exhibited low aromaticity stretching at 920 cm−1 and 1650 cm−1. Glucose-derived CO2 was maximal (26 ± 2.2 mg g−1 C) in the control soil without FT and decreased to 8.6 ± 0.1 mg g−1 C after three cycles. Glucose induced an intensely positive PE, 41–64% of basal respiration for a single FT cycle and 72–76% for no cycles. However, after three FT cycles, there was null or negative PE (− 9.5–0.4%). On average, the  SOC content after net C balance increased with freezing frequency from 103 ± 14 to 212 ± 7. mg C kg−1 in low clay forming soil and from 129 ± 14 to 156 ± 2 mg C kg−1 in high clay forming soil and declined with increasing PE in both soils (R2 = 0.87, p < 0.01). Diminution in freezing frequency because of global warming will increase the positive PE, affecting the C sequestration of incipient SOC formation in maritime Antarctic soils.

Graphic abstract

Summary of the results demonstrating the impact of freezing frequency (hypotheses of this study) on the priming effect and the distribution of labeled 13C glucose-derived for HCF soil as example. All pools are expressed in mg C kg−1 dry soil

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6

Similar content being viewed by others

Data Availability

Enquiries about data availability should be directed to the authors.

References

Download references

Acknowledgements

The authors sincerely appreciate the logistic support from INACH project RT_17_23 and MEC 80180029 (ANID-Chile). The authors are also grateful to the RUDN University Strategic Academic Leadership Program and the Universidad de La Frontera.

Funding

INACH for their logistic support to the present Project RT-17_23, Program attraction, and insertion of advanced human capital from foreign, MEC80180029. Universidad de La Frontera D121-1003.

Author information

Authors and Affiliations

Authors

Contributions

FM: Field campaign, conceptualisation, experimental design, methodology, writing. DM: experimental setup. FN: Field campaign and editing. CM: Field campaign, conceptualisation. YK: Field campaign, conceptualisation, review, and editing. KW: Field campaign and editing. JB: editing. FA: Resource isotope analyses, review, and editing. IJ: editing. MD: Conceptualisation, review, and editing.

Corresponding author

Correspondence to Francisco Matus.

Ethics declarations

Conflict of interest

The authors report no conflict of interest.

Additional information

Responsible Editor: Jack Brookshire.

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Supplementary Information

Below is the link to the electronic supplementary material.

Supplementary file1 (DOCX 14788 KB)

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Matus, F., Mendoza, D., Nájera, F. et al. Freezing–thawing cycles affect organic matter decomposition in periglacial maritime Antarctic soils. Biogeochemistry 163, 311–325 (2023). https://doi.org/10.1007/s10533-023-01032-z

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10533-023-01032-z

Keywords

Navigation