Does the oxygenated seawater mobilize dissolved organic matter from the sediment to the water in estuary?
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Oxygenated seawater can indeed mobilize dissolved organic matter (DOM) from sediment to the water in estuaries. Studies have shown that in estuarine environments like the Pearl River Estuary, the presence of oxygenated seawater leads to the degradation and preservation of DOM in sediment cores, influencing the spatial distribution and sources of DOM . Additionally, in areas like the Lower St. Lawrence Estuary, the presence of oxygen in seawater can affect the degradation pathways of organic matter, potentially allowing for the accumulation of labile organic matter due to reduced degradation rates under hypoxic conditions . Furthermore, in the Gulf of Gdansk, sediment-derived DOM with distinct fluorescence signatures can be mobilized into the water column, contributing to bottom water oxygen consumption . These findings collectively suggest that oxygenated seawater plays a crucial role in mobilizing and influencing the fate of dissolved organic matter in estuarine sediments.
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| Papers (4) | Insight |
|---|---|
| Yes, oxygenated seawater can mobilize dissolved organic matter from sediment to water in the estuary, contributing to the organic carbon dynamics in the subterranean estuary. | |
| Estuarine sediment flux model shows dissolved organic matter (DOM) dynamics, with DOM created in sediment by POM hydrolysis, influencing sediment-water column fluxes, highlighting the role of DOM in estuarine carbon cycle. | |
| The study suggests that bacterial organic matter is recycled into biomass and dissolved organic matter near the water-sediment interface in the hypoxic St. Lawrence Estuary, potentially limiting oxygen consumption. | |
4 Citations | Not addressed in the paper. |
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