Recent research published in the journal Nature has confirmed the presence of microplastics in deep oceans around the world, from the surface to abyssal zones such as the Mariana Trench. This finding represents a crucial breakthrough in understanding the distribution of these particles and their potential interference with essential processes such as the absorption of carbon dioxide by the sea.
The extent of underwater plastic pollution
Data from 1,885 sampling stations collected between 2014 and 2024 were analyzed for the study. The results showed a persistent presence of microplastics throughout the water column. In regions such as the Mariana Trench, up to 13,000 particles per cubic meter were recorded at a depth of seven kilometers. The smallest particles (1-100 µm) were found to be the most numerous. were found to be the most numerous and the most likely to remain suspended for long periods, according to the web portal El Espectador.
While larger fragments tend to be trapped by water layering, smaller fragments are easily dispersed, which increases their contact with marine fauna. marine fauna. The researchers point out that this ubiquity could affect key biological functions, especially in filter-feeding organisms and food chains.
Risks of microplastics in the deep ocean
One of the most relevant findings is the possible relationship between the presence of microplastics presence of microplastics and the reduction of the capacity of the oceans to act as carbon sinks. The accumulation of these particles could modify the transport of carbon in the sea, affecting the efficiency of the biogeochemical cycle that regulates the planet’s climate.
The author team recommends standardization of methodologies and international coordination to allow more accurate and continuous monitoring. These measures would be essential for assessing long-term risks and developing management policies to mitigate the spread of microplastics in marine ecosystems.
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Source and photo: Nature
