Peatland Ecosystem Dynamics and Climate Change Impacts

Peatlands occupy a small fraction of the Earth’s land surface but store disproportionately large volumes of carbon in waterlogged soils. Their characteristic anaerobic conditions slow organic matter breakdown, allowing peat to accumulate over millennia. Alterations to hydrology, whether through climate-driven droughts or human drainage, lower the water table and accelerate microbial decomposition, shifting peatlands from carbon sinks to sources of carbon dioxide, methane and nitrous oxide. Conversely, maintaining or restoring high water tables preserves peat accumulation and mitigates greenhouse-gas emissions. Vegetation composition, substrate quality and microtopography further modulate gas fluxes, leading to fine-scale heterogeneity in emissions. Integrating these complex biogeochemical processes into global climate models is essential for accurately projecting feedbacks and for designing effective conservation, restoration and management strategies that leverage peatland dynamics as nature-based solutions to climate change.

Research from Nature Portfolio

Recent studies have refined estimates of greenhouse-gas balances in various peatland contexts. Field measurements in tropical peat landscapes reveal that plantation forestry on rewetted peat emits substantially less carbon than degraded sites, though still more than intact forest, thus providing improved emission factors for management decisions. Investigations into prompt rewetting highlight that halting drainage reduces persistent CO₂ release, and although rewetting can lead to short-lived methane pulses, the long-term radiative balance favours restoration. Seminal modelling comparisons further demonstrate that peatland rehabilitation yields greater carbon-savings per unit nitrogen and land area than mineral-soil sequestration, underscoring rehabilitation as a highly efficient mitigation pathway.

Peatland Ecosystem Dynamics and Climate Change Impacts publication trend

The graph below shows the total number of articles in peatland ecosystem dynamics and climate change impacts across all publications each year (not limited to Nature Index journals).

Technical terms

Peatland: Wetland ecosystem characterised by the accumulation of partially decomposed organic matter (peat) under water-saturated, anaerobic conditions.

Water table: The subsurface level at which soil pores or rock fractures are saturated with water, controlling oxygen availability and microbial activity.

Greenhouse-gas flux: The rate of emission or uptake of gases such as CO₂, CH₄ and N₂O between the ecosystem and the atmosphere.

Net ecosystem exchange (NEE): The balance of carbon dioxide uptake by photosynthesis and release by respiration across an ecosystem over a given period.

Carbon sequestration: The long-term storage of atmospheric carbon in vegetation, soils or peat, reducing greenhouse-gas concentrations in the atmosphere.

Radiative forcing: A measure of the change in energy balance in the atmosphere due to greenhouse-gas concentration changes, influencing climate warming or cooling.

References

1. Peatlands and the carbon cycle: from local processes to global implications – a synthesis. Biogeosciences (2008).
2. Net greenhouse gas balance of fibre wood plantation on peat in Indonesia. Nature (2023).
3. Prompt rewetting of drained peatlands reduces climate warming despite methane emissions. Nature Communications (2020).
4. The underappreciated potential of peatlands in global climate change mitigation strategies. Nature Communications (2018).
5. Greenhouse gas removal in agricultural peatland via raised water levels and soil amendment. Biochar (2025).
6. Hidden becomes clear: Optical remote sensing of vegetation reveals water table dynamics in northern peatlands. Remote Sensing of Environment (2023).
7. Fine-Scale Spatial Variability of Greenhouse Gas Emissions From a Subantarctic Peatland Bog. Environmental Science and Technology (2024).