The importance of vegetation in affecting CH4emissions was investigated in aCarex‐dominated fen located near Schefferville, Quebec, and in the Experimental Lakes Area, Ontario. Comparison of emission rates with and without the presence of aboveground vegetation indicated that over 90% of the emission was plant‐associated transport. Further evidence of this association was found in a linear correlation of CH4emission with aboveground plant biomass (R=0.93). To test the importance of aboveground plant photosynthetic production on methane production, aboveground vegetation was clipped from sites continually over the growing season. Both emissions and dissolved pore water CH4were reduced relative to adjacent vegetated areas. A significant correlation (R=0.93) of CH4emissions with net CO2exchange in this fen gives evidence of the close association between new plant production and methanogene
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