Analysis finds increased CO2 decreases methane emissions from vegetation

A new paper from SPPI & CO2 Science finds the CO2 fertilization effect and warming both tend to reduce the production of methane from natural vegetation. 

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[Illustrations, footnotes and references available in PDF version]

Excerpt:

What impact do global warming, the ongoing rise in the air's carbon dioxide (CO2) content and a number of other contemporary environmental trends have on the atmosphere's methane (CH4) concentration? 

In closing, it would appear that current environmental trends that may impact methane emissions from natural vegetation, including the ongoing rise in the air's CO2 content, primarily tend to reduce this flux; and perhaps that is why the rate-of-rise of the atmosphere's methane concentration has changed little over the past couple of decades