Distribution and effects of shallow gas on bulk estuarine sediment properties

Source partitioning of oxygen‐consuming organic matter in the hypoxic zone of the Chesapeake Bay

“…Previous studies have demonstrated that SR (60–80%) and AR (20–40%) appear to be the most important pathways for organic carbon mineralization in mid‐bay sediments at ≥ 10 m water depth (Burdige and Homstead ; Roden et al ). Alternative metabolic pathways (nitrification and methanogenesis) occur at relatively low rates in the mid‐bay in summer (Kemp et al ; Hill et al ; Brady et al ; Testa et al ), while much of the metal oxide reduction is dominated by interaction with sulfide, rather than oxidation of sedimentary OM (Burdige ; Lustwerk and Burdige ).…”

Source partitioning of oxygen‐consuming organic matter in the hypoxic zone of the Chesapeake Bay

“…Previous studies have demonstrated that SR (60–80%) and AR (20–40%) appear to be the most important pathways for organic carbon mineralization in mid‐bay sediments at ≥ 10 m water depth (Burdige and Homstead ; Roden et al ). Alternative metabolic pathways (nitrification and methanogenesis) occur at relatively low rates in the mid‐bay in summer (Kemp et al ; Hill et al ; Brady et al ; Testa et al ), while much of the metal oxide reduction is dominated by interaction with sulfide, rather than oxidation of sedimentary OM (Burdige ; Lustwerk and Burdige ).…”

Shallow gas seismic structures: forms and distribution on Santa Catarina Island, Southern Brazil

“…A richer sulfur content in the surface sediments close to those features corroborates the hypothesis that those gases may be escaping from the sedimentary column (SOUZA et al, 2011, BONETTI et al, 2007. Although there exists the co-occurrence of gas features and sediment enriched by total sulfur in the study area, the correlation between them is very complex, as discussed by HILL et al (1992).…”

Methane concentrations increase in bottom waters during summertime anoxia in the highly eutrophic estuary, Chesapeake Bay, U.S.A.

“…The blue basemap is bathymetry from NOAA. Red indicates areas of shallow methane gas bubbles in the main channel, redrawn from Hill et al (). The black star indicates the location of the benthic landers and the September 2013 methane profile.…”

Source partitioning of oxygen‐consuming organic matter in the hypoxic zone of the Chesapeake Bay

“…Previous studies have demonstrated that SR (60–80%) and AR (20–40%) appear to be the most important pathways for organic carbon mineralization in mid‐bay sediments at ≥ 10 m water depth (Burdige and Homstead ; Roden et al ). Alternative metabolic pathways (nitrification and methanogenesis) occur at relatively low rates in the mid‐bay in summer (Kemp et al ; Hill et al ; Brady et al ; Testa et al ), while much of the metal oxide reduction is dominated by interaction with sulfide, rather than oxidation of sedimentary OM (Burdige ; Lustwerk and Burdige ).…”

Shallow gas seismic structures: forms and distribution on Santa Catarina Island, Southern Brazil

“…A richer sulfur content in the surface sediments close to those features corroborates the hypothesis that those gases may be escaping from the sedimentary column (SOUZA et al, 2011, BONETTI et al, 2007. Although there exists the co-occurrence of gas features and sediment enriched by total sulfur in the study area, the correlation between them is very complex, as discussed by HILL et al (1992).…”

Methane concentrations increase in bottom waters during summertime anoxia in the highly eutrophic estuary, Chesapeake Bay, U.S.A.

“…The blue basemap is bathymetry from NOAA. Red indicates areas of shallow methane gas bubbles in the main channel, redrawn from Hill et al (). The black star indicates the location of the benthic landers and the September 2013 methane profile.…”

Source partitioning of oxygen‐consuming organic matter in the hypoxic zone of the Chesapeake Bay

“…Previous studies have demonstrated that SR (60–80%) and AR (20–40%) appear to be the most important pathways for organic carbon mineralization in mid‐bay sediments at ≥ 10 m water depth (Burdige and Homstead ; Roden et al ). Alternative metabolic pathways (nitrification and methanogenesis) occur at relatively low rates in the mid‐bay in summer (Kemp et al ; Hill et al ; Brady et al ; Testa et al ), while much of the metal oxide reduction is dominated by interaction with sulfide, rather than oxidation of sedimentary OM (Burdige ; Lustwerk and Burdige ).…”

Shallow gas seismic structures: forms and distribution on Santa Catarina Island, Southern Brazil

“…A richer sulfur content in the surface sediments close to those features corroborates the hypothesis that those gases may be escaping from the sedimentary column (SOUZA et al, 2011, BONETTI et al, 2007. Although there exists the co-occurrence of gas features and sediment enriched by total sulfur in the study area, the correlation between them is very complex, as discussed by HILL et al (1992).…”

Methane concentrations increase in bottom waters during summertime anoxia in the highly eutrophic estuary, Chesapeake Bay, U.S.A.

“…The blue basemap is bathymetry from NOAA. Red indicates areas of shallow methane gas bubbles in the main channel, redrawn from Hill et al (). The black star indicates the location of the benthic landers and the September 2013 methane profile.…”