{"id":241666,"date":"2021-05-04T10:10:39","date_gmt":"2021-05-04T07:10:39","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/plastic-pollution-in-the-deep-sea-a-geological-perspective\/"},"modified":"2021-05-04T10:10:39","modified_gmt":"2021-05-04T07:10:39","slug":"plastic-pollution-in-the-deep-sea-a-geological-perspective","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/plastic-pollution-in-the-deep-sea-a-geological-perspective\/","title":{"rendered":"#Plastic pollution in the deep sea: A geological perspective"},"content":{"rendered":"

“#Plastic pollution in the deep sea: A geological perspective<\/strong>”<\/p>\n

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\"Plastic
\n Pollutants, including plastic, reach deep-sea fans through linked sediment routing systems, as well as from outside the associated catchment(s), via near-shore and shelfal currents (i.e., littoral cells), eolian transport, surface currents, and direct input from oceanic sources such as shipping and fishing. Credit: I.A. Kane and A. Fildani (Modified from Hessler and Fildani [2019].)
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A new focus article in the May issue of Geology<\/i> summarizes research on plastic waste in marine and sedimentary environments. Authors I.A. Kane of the Univ. of Manchester and A. Fildani of the Deep Time Institute write that “Environmental pollution caused by uncontrolled human activity is occurring on a vast and unprecedented scale around the globe. Of the diverse forms of anthropogenic pollution, the release of plastic into nature, and particularly the oceans, is one of the most recent and visible effects.”<\/p>\n


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The authors cite multiple studies, including one in the May issue by Guangfa Zhong and Xiaotong Peng. Zhong and Peng were surprised to find plastic waste in a deep-sea submarine canyon located in the northwestern South China Sea.<\/p>\n

“Plastic is general<\/a>ly considered to be the dominant component of marine litter, due to its durability and the large volume produced,” write Kane and Fildani. “Nano- and microplastics are a particularly insidious form of anthropogenic pollutant: tiny fragments and fibers may be invisible to the naked eye, but they are ingested with the food and water we consume and absorbed into the flesh of organisms.”<\/p>\n

One of their vital questions is, “If some plastics can survive for >1000 years in terrestrial environments, how long do they last in ocean trenches that are kilometers deep, dark, cold, and at high pressure? How long does it take microplastic to break down into microplastics and nanoplastics in the deep sea?”<\/p>\n

“While it is incumbent on policy makers to take action now to protect the oceans from further harm, we recognize the roles that geoscientists can play,” write Kane and Fildani. That includes using their deep-time perspective to address the societal challenges, their understanding of the present-day distribution on the seafloor and in the sedimentary record, using geoscience<\/a> techniques to record the downstream effects of mitigation efforts, and to predict the future of seafloor plastics.<\/p>\n

In summary, they write, “We understand … the transient nature of the stratigraphic record and its surprising preservation, and the unique geochemical environments found in deep-sea sediments. Our source-to-sink app<\/a>roach to elucidate land-to-sea linkages can identify the sources and pathways that plastics take while traversing natural habitats and identify the context in which they are ultimately sequestered, and the ecosystems they affect. This will happen by working closely with oceanographers, biologists, chemists, and others tackling the global pollution problem.”<\/p>\n\n

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Underwater avalanches are trapping microplastics in the deep ocean\n <\/p><\/div>\n

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\n More information:<\/strong>
\n I.A. Kane et al. Anthropogenic pollution in deep-marine sedimentary systems\u2014A geological perspective on the plastic problem, Geology<\/i> (2021). DOI: 10.1130\/focus052021.1<\/a><\/p><\/div>\n
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\n Geological Society of America
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Citation<\/strong>:
\n Plastic pollution in the deep sea: A geological perspective (2021, May 4)
\n retrieved 4 May 2021
\n from https:\/\/phys.org\/news<\/a>\/2021-05-plastic-pollution-deep-sea-geological.html<\/p>\n

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
\n part may be reproduced without the written permission. The content is provided for information purposes only.<\/p><\/div>\n<\/p><\/div>\n