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A recent study hypothesizes that the nodules are a source of "dark oxygen", oxygen produced without light, which provides the seafloor in the deep ocean with oxygen. [36] However, this study contrasts with many other studies conducted over decades in the deep sea that did not detect oxygen production - and in fact showed only oxygen consumption.
The discovery that abyssal, or deep-sea, nodules are producing oxygen is “an amazing and unexpected finding,” said Daniel Jones, a professor and head of ocean biogeosciences at the National ...
The production of oxygen at the seafloor by polymetallic nodules is a new ecosystem function that needs to be considered when assessing the impact of deep-sea mining.
Uncovering dark oxygen revealed just how little is known about the deep ocean, and the Clarion-Clipperton Zone, or CCZ, in particular.The region is being explored for the deep-sea mining of rare ...
Deep sea mining is the extraction of minerals from the seabed of the deep sea. ... They have found that manganese nodules on the deep sea floor produce oxygen. [91]
Dark oxygen production refers to the generation of molecular oxygen (O 2) through processes that do not involve light-dependent oxygenic photosynthesis.The name therefore uses a different sense of 'dark' than that used in the phrase "biological dark matter" (for example) which indicates obscurity to scientific assessment rather than the photometric meaning.
They came from several expeditions to an area of the deep sea between Hawaii and Mexico, where Prof Sweetman and his colleagues sent sensors to the seabed - at about 5km (3.1 miles) depth.
They have found that manganese nodules on the deep sea floor produce free oxygen from water molecules. [ 11 ] The manganese nodules act as a kind of battery as they contain different metals, and they release oxygen into the environment.