Tuesday, August 5, 2025
Science
No Result
View All Result
  • Login
  • HOME
  • SCIENCE NEWS
  • CONTACT US
  • HOME
  • SCIENCE NEWS
  • CONTACT US
No Result
View All Result
Scienmag
No Result
View All Result
Home Science News Earth Science

Unravelling differences in the temperature sensitivity of soil organic matter decomposition under various oxygen conditions

April 15, 2024
in Earth Science
Reading Time: 3 mins read
0
Figure 1
66
SHARES
596
VIEWS
Share on FacebookShare on Twitter
ADVERTISEMENT
ADVERTISEMENT

Soil organic matter (SOM) decomposition is a key process that affects soil carbon storage and greenhouse gas emissions. Investigating the temperature sensitivity (Q10) of SOM decomposition and its regulating mechanisms is important for improving predictions of SOM stability and carbon fluxes under future warming. Most studies on Q10 are based on aerobic conditions, but little is known about how Q10 varies in soils under oxygen limitation. This study compares Q10 under oxic, suboxic, and anoxic conditions in three grassland soils and reveals the different roles of substrate carbon quality and nitrogen limitation in regulating Q10. The findings were published in Soil Ecology Letters on January 18, 2024.

Figure 1

Credit: Zhenhui Jiang, Xin Wang, Ting Liu, Xiaojuan Feng

Soil organic matter (SOM) decomposition is a key process that affects soil carbon storage and greenhouse gas emissions. Investigating the temperature sensitivity (Q10) of SOM decomposition and its regulating mechanisms is important for improving predictions of SOM stability and carbon fluxes under future warming. Most studies on Q10 are based on aerobic conditions, but little is known about how Q10 varies in soils under oxygen limitation. This study compares Q10 under oxic, suboxic, and anoxic conditions in three grassland soils and reveals the different roles of substrate carbon quality and nitrogen limitation in regulating Q10. The findings were published in Soil Ecology Letters on January 18, 2024.

 

Xiaojuan Feng’s team at the Institute of Botany, Chinese Academy of Sciences, conducted soil microcosm incubation experiments to test how Q10 varies in three grassland soils at different oxygen levels. They used three oxygen concentrations of 21%, 1% and 0% to simulate oxic, suboxic and anoxic conditions, respectively. They found that Q10 did not show consistent patterns under different oxygen conditions, suggesting that other factors may override the effect of oxygen on Q10. To delve deeper into these findings, they analyzed the soil properties by conducting a supplementary experiment and found that substrate carbon quality was a strong predictor of Q10 in oxic soils, while nitrogen limitation was more important in suboxic and anoxic soils.

Professor Xiaojuan Feng, the corresponding author of the study, said, “We used incubated soils at varying temperatures to calculate Q10. This method is increasingly popular in estimating Q10, as it eliminates potential complications introduced by varying depletion rates of substrates at different, constant temperatures, which may affect soil C concentrations and microbial biomass in ‘equal-time’ incubations.”

“Our study shows that substrate carbon quality and nitrogen limitation may play roles of varying importance in determining Q10 under various oxygen conditions. This implies that the response of SOM decomposition to warming may differ among soil types and moisture regimes due to differences in substrate availability and quality as well as nitrogen status.”

The study also highlights the importance of considering oxygen availability and its interactions with other factors when predicting soil carbon dynamics under climate change. Oxygen-deprived soils are widespread in wetlands and upland microsites, which contain a large proportion of global soil carbon stock. Understanding how Q10 varies under different oxygen conditions will help improve the accuracy and reliability of soil carbon models and better inform management practices for soil carbon sequestration.



Journal

Soil Ecology Letters

DOI

10.1007/s42832-023-0189-z

Method of Research

Experimental study

Subject of Research

Not applicable

Article Title

Comparing the temperature sensitivity of organic matter decomposition in oxic and oxygen-deprived soils

Article Publication Date

20-Jan-2024

Share26Tweet17
Previous Post

NIH awards $2.3 million grant to University of Oklahoma for gene therapy research

Next Post

Fralin Biomedical Research Institute team unpacking genetic mysteries of childhood epilepsies

Related Posts

blank
Earth Science

Smithsonian Digitizes Pollen from 18,000 Plant Species

August 5, 2025
blank
Earth Science

Flexible MOF Films Enable Reversible Low-Pressure CO2 Capture

August 5, 2025
blank
Earth Science

Dinosaur Teeth Unlock Secrets of Ancient Climates

August 5, 2025
blank
Earth Science

Miocene African Topography Disrupts Monsoon-Somali Jet Link

August 5, 2025
blank
Earth Science

Significant Progress in Typhoon Track Forecasting Using Global Convection-Permitting Model

August 5, 2025
blank
Earth Science

Janus Effect of FeCo Catalyst in Acidic ORR

August 5, 2025
Next Post
Neural excitement

Fralin Biomedical Research Institute team unpacking genetic mysteries of childhood epilepsies

  • Mothers who receive childcare support from maternal grandparents show more parental warmth, finds NTU Singapore study

    Mothers who receive childcare support from maternal grandparents show more parental warmth, finds NTU Singapore study

    27530 shares
    Share 11009 Tweet 6881
  • University of Seville Breaks 120-Year-Old Mystery, Revises a Key Einstein Concept

    941 shares
    Share 376 Tweet 235
  • Bee body mass, pathogens and local climate influence heat tolerance

    641 shares
    Share 256 Tweet 160
  • Researchers record first-ever images and data of a shark experiencing a boat strike

    506 shares
    Share 202 Tweet 127
  • Warm seawater speeding up melting of ‘Doomsday Glacier,’ scientists warn

    310 shares
    Share 124 Tweet 78
Science

Embark on a thrilling journey of discovery with Scienmag.com—your ultimate source for cutting-edge breakthroughs. Immerse yourself in a world where curiosity knows no limits and tomorrow’s possibilities become today’s reality!

RECENT NEWS

  • GABA Best Detects Early Parkinson’s Changes with RBD
  • Twentieth-Century Geography Shaping Chinese Nation Concept
  • Advanced Treatment Ensures Consistent Microplastic Removal Year-Round
  • Global Insights into Cameroonian Plasmodium falciparum Diversity

Categories

  • Agriculture
  • Anthropology
  • Archaeology
  • Athmospheric
  • Biology
  • Bussines
  • Cancer
  • Chemistry
  • Climate
  • Earth Science
  • Marine
  • Mathematics
  • Medicine
  • Pediatry
  • Policy
  • Psychology & Psychiatry
  • Science Education
  • Social Science
  • Space
  • Technology and Engineering

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 5,184 other subscribers

© 2025 Scienmag - Science Magazine

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
No Result
View All Result
  • HOME
  • SCIENCE NEWS
  • CONTACT US

© 2025 Scienmag - Science Magazine

Discover more from Science

Subscribe now to keep reading and get access to the full archive.

Continue reading