Substantial portions of the affected Gulf weren’t just low in oxygen, but virtually devoid of it from the surface to the seafloor. And researchers could literally smell the problem, notes Nancy Rabalais, executive director of the Louisiana Universities Marine Consortium, based in Chauvin. Where oxygen loss occurs at the seafloor, she reports, the sediment gurgles up hydrogen sulfide — a gas that carries the stench of rotten eggs to the surface.Various ongoing concerns.
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