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Biogeochemical processes in land-ocean interfaces, surface estuaries, subterranean estuaries and sediment-water interface
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The effect of coastal restoration on CO2 and CH4 fluxes in a Spartina salt marsh and brackish Phragmites marsh in Massachusetts
Monday 7th @ 1510-1530, Conference Room 1
Jianwu Tang* , The Ecosystems Center, Marine Biological Laboratory, Woods Hole, MA, USA
Faming Wang, The Ecosystems Center, Marine Biological Laboratory, Woods Hole, MA, USA
Kevin Kroeger, United States Geological Survey Woods Hole Science Center. Woods Hole, MA, USA
Presenter Email: jtang@mbl.edu |
| Coastal salt marshes play an important role in global and regional carbon cycling. Tidally restricted marshes reduce salinity and provide a habitat suitable for Phragmites invasion. We measured greenhouse gas (GHG) emissions (CO2 and CH4) continuously with the eddy covariance method and biweekly with the static chamber method in a Spartina salt marsh and a Phragmites marsh on Cape Cod, Massachusetts, USA. We did not find significant difference in CO2 fluxes between the two sites, but the CH4 fluxes were much higher in the Phragmites site than the Spartina marsh. Temporally, tidal cycles influence the CO2 and CH4 fluxes in both sites. We found that the salt marsh was a significant carbon sink when CO2 and CH4 fluxes were combined. Restoring tidally restricted marshes will significantly reduce CH4 emissions and provide a strong ecosystem carbon service. |
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