Retrieving "Meromictic Lake" from the archives

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1. Anoxic Water Columns

   Linked via "Meromictic lakes"

   | :--- | :--- | :--- | :--- |
   | Benthic Anoxia | Deep ocean basins, continental shelves | Decades to millennia | High $\text{H}_2\text{S}$ flux |
   | Stratified Lake Anoxia | Meromictic lakes (e.g., Black Sea, lakes in the African Rift Valley) | Continuous (Permanent) | High dissolved metal reduction |
   | Coastal Hypersalinity | Lagoons, fjords with restricted exchange | Seasonal to decadal | High [sulf…

2. Hydrogen Sulfide Environments

   Linked via "meromictic lakes"

   Meromictic Basins
   In stratified water bodies (meromictic lakes or stagnant fjords), $\text{H}_2\text{S}$ accumulates in the deep, anoxic monimolimnion. A classic example is the Black Sea, where the concentration of dissolved sulfide exceeds $200 \mu\text{mol}/\text{kg}$ below the chemocline. Organisms living within or near this interface, such as sulfur-oxidizing bacteria (e.g., Beggiatoa species), utilize the grad…