Soil moisture and microbiome explain greenhouse gas exchange in global peatlands

Sammanfattning

Earth's climate is tightly connected to carbon and nitrogen exchange between the atmosphere and ecosystems. Wet peatland ecosystems take up carbon dioxide in plants and accumulate organic carbon in soil but release methane. Man-made drainage releases carbon dioxide and nitrous oxide from peat soils. Carbon and nitrous gas exchange and their relationships with environmental conditions are poorly understood. Here, we show that open peatlands in both their wet and dry extremes are greenhouse gas sinks while peat carbon/nitrogen ratios are high and prokaryotic (bacterial and archaeal) abundances are low. Conversely, peatlands with moderate soil moisture levels emit carbon dioxide and nitrous oxide, while prokaryotic abundances are high. The results challenge the current assumption of a uniform effect of drainage on greenhouse gas emissions and show that the peat microbiome of greenhouse-gas sources differs fundamentally from sinks.

Publicerad i

Scientific Reports
2025, volym: 15, nummer: 1, artikelnummer: 10153
Utgivare: NATURE PORTFOLIO

SLU författare

• Bahram, Mohammad

  • Institutionen för ekologi, Sveriges lantbruksuniversitet
    
  • Aarhus Universitet

UKÄ forskningsämne

Klimatvetenskap
Markvetenskap

Publikationens identifierare

• DOI: https://doi.org/10.1038/s41598-025-92891-z

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/141660