Radioactive fish: Scientist find traces of radioactive carbon from nuclear bomb tests in tiny organisms deep in the oceans

Amid all climate change caused due to human activity, scientists have recently discovered that isotopes released by nuclear explosions have reached bottom of earth's oceans.

In a recent study published in  American Geophysical Union (AGU), first evidence of rioactive carbon from nuclear bomb tests conducted in early 20th century during and post- World wars, were found in tiny organisms inhabiting deepest spot in ocean.

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study has found that organisms at ocean surface have incorporated this "bomb carbon" into molecules that make up ir bodies since late 1950s. study has also revealed that while as of w, crustaceans (aquatic species) are feeding on se nuclear-infused organic matter shed by se organisms, human pollution can quickly enter food web and make its way to deep ocean.

Explaining accelerated pace at which humans can enter this rioactive food web, Ning Wang, a geochemist at Chinese Acemy of Sciences in Guangzhou, China, and le author of new study, has said:

"Although oceanic circulation takes hundreds of years to bring water containing bomb [carbon] to deepest trench, food chain achieves this much faster."

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Amphipod inhabiting Mariana Trench (Photo: Daiju Azuma)

Giving a stern warning of future human behavior, Weidong Sun, co-author of study, has said that as re was a very strong interaction between surface and ocean-bottom, human activities can affect biosystems residing as deep as 11,000 meters.

"re's a very strong interaction between surface and bottom, in terms of biologic systems, and human activities can affect biosystems even down to 11,000 meters, so we need to be careful about our future behaviors," said Sun.

scope of study is that it would help scientists better understand how creatures have apted to living in nutrient-poor environment of deep ocean, according to authors. study has also helped in understanding that amphipods' large size and long life are likely byproducts of ir evolution to living in environment of low temperatures, high pressure, and limited food supply, according to AGU.