Methane from Some Wetlands May Lower Benefits of Carbon Sequestration

usgs logoSacramento, Calif. – Methane emissions from restored wetlands may offset the benefits of carbon sequestration a new study from the U.S. Geological Survey suggests. Wetlands are known to reduce atmospheric carbon dioxide through plant photosynthesis and also provide habitat and food sources for wildlife, act as biological filters for improving water quality and improve coastal protection in the face of sea level rise. What is not well understood is how wetland production of other more potent greenhouses gases like methane offset these benefits. Results from the new study show that restored wetlands can release enough methane to reduce or even negate the benefits the same wetlands offer of carbon sequestration.

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