Quantifying the fluxes of carbon loss from an undrained tropical peatland ecosystem in Indonesia

  • 0Yayasan Konservasi Alam Nusantara, Jakarta, Indonesia.

|

|

Summary

This summary is machine-generated.

Conserving undrained tropical peatlands in Indonesia is vital for climate mitigation. These ecosystems store significant carbon, and protecting them avoids substantial emissions compared to drained peatlands, offering a promising natural climate solution.

Area Of Science

  • Environmental Science
  • Climate Science
  • Ecology

Background

  • Tropical peatlands are critical carbon sinks, storing vast amounts of carbon under water-logged, anoxic conditions.
  • Accurate carbon flux measurements are scarce, hindering the estimation of climate change mitigation potential from peatland conservation.
  • Undrained peat swamp forests in Indonesia are under threat from drainage and degradation.

Purpose Of The Study

  • To quantify carbon dioxide (CO2) and methane (CH4) fluxes from an undrained tropical peatland in East Kalimantan, Indonesia.
  • To measure fluvial organic carbon export to assess total carbon loss.
  • To improve carbon accounting for undrained tropical peatlands and evaluate their climate mitigation potential.

Main Methods

  • Conducted year-round measurements (Oct 2022-Sep 2023) of CO2 and CH4 fluxes.
  • Quantified fluvial organic carbon export.
  • Calculated total carbon loss and compared it with drained peatland landscapes.

Main Results

  • The undrained peat swamp forest emitted an average of 11.02 ± 0.49 MgCO2 ha-1 yr-1 of CO2 and 0.58 ± 0.04 MgCO2e ha-1 yr-1 of CH4.
  • Fluvial organic carbon export accounted for an additional loss of 1.68 ± 0.06 MgCO2e ha-1 yr-1.
  • Total estimated carbon loss was 13.28 ± 0.50 MgCO2e ha-1 yr-1, approximately half that of drained peatlands in the region.

Conclusions

  • Undrained tropical peatlands, even when emitting greenhouse gases, represent a significant onsite carbon sink potential.
  • Conservation of undrained peatlands in Indonesia is a viable natural climate solution, avoiding substantial carbon emissions.
  • These findings underscore the importance of preventing drainage and degradation of remaining undrained peatland ecosystems.