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Chinese Academy of Sciences

Research Reveals Crucial Role of Hydrolases in Regulating Wetland CO2 Emissions Under Warming and Water Level Reduction Conditions

Strategic Insights

— 1 min read

Researchers at the Chinese Academy of Sciences have conducted a comprehensive study on the relationship between temperature, water level, and CO2 emissions in marsh wetlands. The study, published in the journal Applied Soil Ecology, revealed that hydrolases play a significant role in regulating CO2 emissions in these ecosystems. The research found that warming and water level reduction can significantly enhance soil hydrolases activities, bacteria, and nirK gene abundances, microbial biomass carbon and nitrogen contents.

Key Takeaways:

  • The study found that CO2 emissions in the growing season reached a maximum value of 425.26 mg·m⁻²·h⁻¹ in the treatment with combined warming and water level reduction.
  • Warming under different water conditions promoted CO2 emissions, while water level reduction interacted with warming and intensified CO2 emissions.
  • The research demonstrated that air and soil temperatures, plant height, and chlorophyll content of Carex lasiocarpa are critical factors influencing the dynamic of CO2 emissions in the marsh wetland of the Sanjiang Plain.
  • Mitigating climate warming and enhancing wetland water levels to inhibit hydrolytic enzyme activity may reduce wetland CO2 emissions and increase carbon sink.
  • The study highlighted the essential influence mechanism of hydrolases and microbial biomass on CO2 emissions from marsh wetlands under warming and water level reduction conditions.

Statistics:

  • CO2 flux in the growing season reached a maximum value of 425.26 mg·m⁻²·h⁻¹ in the combined warming and water level reduction treatment.
  • Soil beta-glucosidase (BG) and acid phosphatase (AP) activities, microbial biomass carbon and nitrogen (MBC and MBN) contents, and plant TC showed a positive effect on cumulative CO2 flux.
  • The research demonstrated that air temperature and soil temperature are critical factors influencing the dynamic of CO2 emissions in the marsh wetland.

Sources:

  • Song, Y. et al. (2025). Soil Hydrolases and Microbial Biomass Regulate Wetland CO2 Emissions Under Warming and Water Level Reduction. Applied Soil Ecology, 215.

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