TY - JOUR
T1 - Organic Carbon Fluxes, Degradation, and Accumulation in an Anoxic Basin: Sediment Trap Results from the Cariaco Basin
AU - Thunell, R. C
AU - Varela, R.
AU - Llano, M.
AU - Collister, J.
AU - Muller-Karger, Frank E
AU - Bohrer, R.
PY - 2000/1/1
Y1 - 2000/1/1
N2 - Organic carbon fluxes were measured in the anoxic water column of the Cariaco Basin under varying levels of primary productivity. Our results indicate that water column degradation of fresh organic matter in this anoxic setting is similar to what has been previously observed in the open ocean. Additionally, the rate at which carbon is consumed increases as primary productivity increases. These findings support the hypothesis that sulfate reduction is as efficient as aerobic respiration in degrading labile organic matter and that an anoxic water column does not necessarily result in an enhanced delivery of organic carbon to the sea floor. We estimate that 1-2% of the organic carbon produced at the surface reaches the seafloor and that approximately 50% of this is preserved in the sediments. This burial efficiency is comparable to that previously reported for both oxic and anoxic settings, and with sedimentation rates similar to that in Cariaco Basin.
AB - Organic carbon fluxes were measured in the anoxic water column of the Cariaco Basin under varying levels of primary productivity. Our results indicate that water column degradation of fresh organic matter in this anoxic setting is similar to what has been previously observed in the open ocean. Additionally, the rate at which carbon is consumed increases as primary productivity increases. These findings support the hypothesis that sulfate reduction is as efficient as aerobic respiration in degrading labile organic matter and that an anoxic water column does not necessarily result in an enhanced delivery of organic carbon to the sea floor. We estimate that 1-2% of the organic carbon produced at the surface reaches the seafloor and that approximately 50% of this is preserved in the sediments. This burial efficiency is comparable to that previously reported for both oxic and anoxic settings, and with sedimentation rates similar to that in Cariaco Basin.
UR - https://digitalcommons.usf.edu/msc_facpub/1175
UR - http://10.4319/lo.2000.45.2.0300
U2 - 10.4319/lo.2000.45.2.0300
DO - 10.4319/lo.2000.45.2.0300
M3 - Article
VL - 45
JO - Limnology and Oceanography
JF - Limnology and Oceanography
ER -