Wetlands and Global Warming

  1. What are the major sources of methane?
    The sources of methane are a result of both natural occurences and anthropogenic influences. Methane as a greenhouse gas is much more lower in concentration than CO2, but much more effective in trapping infra-red radiation than CO2. The sources include Rice paddies, wetlands, natural gas leaks, guts of cows and termites
  2. How do wetlands affect global warming?
    Wetlands affect global warming by the methane diffusing through aerenchyma of wetland plants. Emissions are a result of methanogenesis and methane oxidation. Methanogenesis occurs when microbes called methanogens use CO2 as an electron acceptor for the production of methane. Methane oxidation occurs in extremely reduced conditions and O2, NO3 and SO4 have been reduced. Both fresh water and saltwater marshes have a considerable range of methane. Methane production in wetlands are generally higher in the summer time.
  3. How are wetlands affected by global warming?
    Wetlands may be key ecosystems for mitigating the effects of fossil fuel emissions on climate. the resulting sea-level and temp change can have significant impacts on both coastal and inland wetlands. In coastal wetlands, the sea level rise could result in an increase of inundation, erosion and saltwater intrusion. Wetlands will be trapped between a rising sea and protected dry land. Inland wetlands will be affected mostly by temperature rise, which will affect the production and function of inland wetlands. In the tundra, melting of permafrost will destroy the wetlands. A decrease/increase in evapotransporation will affect the flooding of inland wetlands.
Card Set
Wetlands and Global Warming
Quiz 3