![]() ![]() However, few studies relate microplastic accumulation to sediment transport and deposition. Compilation of published data shows that microplastics pervade the global seafloor, from abyssal plains to submarine canyons and deep-sea trenches (where they are most concentrated). We synthesize existing knowledge of seafloor microplastic distribution, and integrate this with process-based sedimentological models of particle transport, to provide new insights, and critically, to identify future research challenges. ![]() Much of this is not recycled and is disposed into the natural environment, has a long environmental residence time and accumulates in sedimentary systems worldwide, posing a threat to important ecosystems and potentially human health. 2National Oceanography Centre, University of Southampton, Southampton, United KingdomĪn estimated 8.3 billion tons of non-biodegradable plastic has been produced over the last 65 years.1School of Earth and Environmental Sciences, University of Manchester, Manchester, United Kingdom. ![]()
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