Input (grade 13): In the brine, the abundance of cells is much lower; extremophiles predominate, including members of the deep-sea hydrothermal vent euryarchaeota (DHVEs), Methanohalophilus and Proteobacteria.
Output (grade 8): Below, in the brine, the number of cells is much lower than in the halocline. Extremophiles are most common, including some of the deep-sea hydrothermal vent archaea and bacteria.