Methane Emissions from Plants

The project aims at studying causes and consequences of aerobically produced methane in plant matter.

Methane is the second most important greenhouse gas and cause a radiative forcing ca. 1/3 of that of carbon dioxide. Closing the global methane budget is challenging and was recently complicated even further by surprising findings of methane release from plant matter at oxidizing conditions in a series of experiments. 

 

The project will focus on two issues: 

  • Causes of aerobically produced methane in plant matter: origin, mechanism, and dependence on environmental variables.
  • Consequences of aerobically produced methane in plant matter: release rates at tissue level, plant level, and ecosystem level. 
     

Methane Emission from Plants 
Exposure of different types of plant material to UV-B irradiation

The studies are being carried out both in the lab and at an experimental field site in a natural terrestrial ecosystem. In the lab, methane emission is measured from plant structural components such as pectin, from fruits and from leaves. The emission rates are investigated for dependence on temperature, UV-A and UV-B irradiation, and natural light. In the lab methane is measured both with GC and on-line measurements by the IRGA and ring down cavity technique. In the field, plant methane emission is studied in relation to natural variation in environmental conditions at both organ level and whole ecosystem level.

Participants:
The project involves Ecosystems Programme, Risø-DTU and University of Copenhagen.

Role:
Risø-DTU is the leader and responsible for all aspects of the project.

Resources:
The project is funded internally by Risø-DTU 

Duration:
The project is funded to run from 2007 through 2011

Employees involved:
Per Ambus (project leader), Dan Bruhn (experiments and supervision of student projects),Teis N Mikkelsen (experiments and supervision of students), Kristian Albert (Ulva). 

Student projects:
Student projects are conducted in connection to the project.

  

 

Page updated  by   11.10.2010


Dan Bruhn
post doc
Biosystems (BIO)
Dir tel+45 46774203