The Importance of Ditches and Canals in Global Inland Water CO2 and N2O Budgets

Sammanfattning

Ditches and canals are omitted from global budgets of inland water emissions, despite research showing them to be emitters of greenhouse gases (GHGs). Here, we synthesize data across climate zones and land use types to show, for the first time, that global ditches emit notable amounts of carbon dioxide (CO2) and nitrous oxide (N2O). Ditches had higher per-area emissions of CO2 and N2O than ponds, lakes, and reservoirs, likely due to high nutrient inputs. Preliminary upscaling showed that the inclusion of ditches would increase global inland water CO2 emissions by 0.6%-1% and N2O emissions by 3%-9%. Trophic state and climate influenced N2O emissions, while CO2 emissions had complex drivers difficult to disentangle at the global scale. This research highlights the importance of including ditches in global inland water GHG budgets and informs more accurate reporting of anthropogenic emissions in national inventories.

Nyckelord

biogeochemistry; carbon dioxide; freshwater ecosystems; greenhouse gas emissions; nitrous oxide

Publicerad i

Global Change Biology
2025, volym: 31, nummer: 3, artikelnummer: e70079
Utgivare: WILEY

SLU författare

• Peacock, Michael

  • Institutionen för vatten och miljö, Sveriges lantbruksuniversitet
    
  • University of Liverpool

UKÄ forskningsämne

Miljövetenskap

Publikationens identifierare

• DOI: https://doi.org/10.1111/gcb.70079

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/141255