Climate science: Methane is created and destroyed in wetlands
Nature Communications
July 1, 2015
A study showing that freshwater wetlands are a significant sink for methane is published in Nature Communications this week. Wetlands are known to be the largest natural source of atmospheric methane, a potent greenhouse gas, but they may also be responsible for destroying as much as 50% of the methane they produce via anaerobic oxidation.
Anaerobic oxidation of methane is a microbial process that occurs in marine and freshwater sediments that contain very little oxygen. This process breaks down methane molecules during reactions, usually with sulphates and nitrates, resulting in energy for the microbes and less harmful waste compounds.
Samantha Joye and colleagues investigated three large freshwater wetlands in very different geographic areas of the USA (tropical, temperate and cold-temperate) and measured the rates at which anaerobic oxidation occurs. Their results suggest the rates of methane destruction are approximately 200 teragrams, which is similar to that of marine environments and certainly much higher than previously thought. Understanding the global methane budget is important for predicting how our climate will change over the next century and identifying this process will allow for the adjusting of current calculations.
doi: 10.1038/ncomms8477
Research highlights
-
May 12
Geoscience: Monitoring earthquakes at the speed of lightNature
-
May 4
Microbiology: Bacteriophage therapy helps treat multi-drug resistant infection in an immunocompromised patientNature Communications
-
Apr 27
Planetary science: Building blocks of DNA detected in meteoritesNature Communications
-
Apr 8
Health: Psilocybin use associated with lower risk of opioid addictionScientific Reports
-
Apr 5
Energy: Winterizing the Texan energy infrastructure pays off in the long termNature Energy
-
Mar 17
Neuroscience: Sample size matters in studies linking brain scans to behaviourNature