Sub-zero soil CO2 respiration in biostimulated hydrocarbon-contaminated cold-climate soil can be linked to the soil-freezing characteristic curve
| dc.contributor.author | Nayeema, Tasnim | |
| dc.contributor.author | Lee, Aslan Hwanhwi | |
| dc.contributor.author | Richter, Amy | |
| dc.contributor.author | Ng, Kelvin Tsun Wai | |
| dc.contributor.author | Chang, Wonjae | |
| dc.date.accessioned | 2025-02-10T03:17:53Z | |
| dc.date.available | 2025-02-10T03:17:53Z | |
| dc.date.issued | 2025-01 | |
| dc.description | Nayeema, T., Lee, A.H., Richter, A. et al. Sub-zero soil CO2 respiration in biostimulated hydrocarbon-contaminated cold-climate soil can be linked to the soil-freezing characteristic curve. Environ Sci Pollut Res 32, 1783–1804 (2025). https://doi.org/10.1007/s11356-024-35824-z The version of record of this article, first published in Environmental Science and Pollution Research, is available online at Publisher’s website: https://doi.org/10.1007/s11356-024-35824-z | |
| dc.description.abstract | Extending unfrozen water availability is critical for stress-tolerant bioremediation of contaminated soils in cold climates. This study employs the soil-freezing characteristic curves (SFCCs) of biostimulated, hydrocarbon-contaminated cold-climate soils to efficiently address the coupled effects of unfrozen water retention and freezing soil temperature on sub-zero soil respiration activity. Freezing-induced soil respiration experiments were conducted under the site-relevant freezing regime, programmed from 4 to − 10 °C at a seasonal soil-freezing rate of − 1 °C/day. The effects of unfrozen water retention on extending soil respiration activity emerged at the onset of soil-freezing. The unfrozen water effect became significant below 0 °C (correlation r = 0.83–0.94) and comparable to the temperature effect (correlation r = 0.82–0.90), successfully demonstrating the coupled effects on sub-zero respiration activity. Soil CO2 respiration modelling based on the temperature dependency only (Arrhenius and Q10 models) did not accurately describe sub-zero respiration activity associated with increased unfrozen water retention in treated contaminated soils. The shifted SFCCs of the treated soils, expressed as a function of soil temperature (T) and unfrozen water content (θ), served as a key framework for efficiently developing the sub-zero respiration model (SFCC-RESP). The developed SFCC-RESP model closely approximated the changes in soil respiration rates influenced by T and θ in the treated soils (R2 = 0.94–0.98) and described the abrupt decrease and subsequent stabilization in CO2 production during the transition to the deeply frozen soil phase. The SFCC-RESP model integrated with soil thermal models (TEMP/W) can be used to produce spatial distributions of T, θ, and CO2 production in the treated soil matrix, providing a tool to approximate the abundance of unfrozen habitable niches when developing cold-tolerant bioremediation strategies. | |
| dc.description.sponsorship | This study was supported by ZMM® Canada Minerals Corp. and Mitacs Accelerate Grant (IT12123 granted to Wonjae Chang). | |
| dc.description.version | Peer Reviewed | |
| dc.identifier.citation | Nayeema, T., Lee, A.H., Richter, A. et al. Sub-zero soil CO2 respiration in biostimulated hydrocarbon-contaminated cold-climate soil can be linked to the soil-freezing characteristic curve. Environ Sci Pollut Res 32, 1783–1804 (2025). https://doi.org/10.1007/s11356-024-35824-z | |
| dc.identifier.doi | https://doi.org/10.1007/s11356-024-35824-z | |
| dc.identifier.uri | https://hdl.handle.net/10388/16556 | |
| dc.language.iso | en | |
| dc.publisher | Environmental Science and Pollution Research | |
| dc.subject | Sub-zero soil respiration | |
| dc.subject | Contaminated soils | |
| dc.subject | Soil-freezing characteristic curve | |
| dc.subject | Unfrozen water content | |
| dc.subject | Bioremediation | |
| dc.subject | Cold climates | |
| dc.title | Sub-zero soil CO2 respiration in biostimulated hydrocarbon-contaminated cold-climate soil can be linked to the soil-freezing characteristic curve | |
| dc.type | Article |