A new mechanism for the entry of microplastics into the food chain

Microplastics enter the plankton assemblies, which are then eaten by fish and raised up the food chain. Scientists from three laboratories based in Toulouse were the first to use microscopy in Energy (The word force can refer to a mechanical force on things, and also, figuratively, a…) atomic problem to study. In the works published in the magazine Science sum (Total is the whole quality, without exception. From an accounting point of view, a…) environmentthey confirmed the existence of a mechanism whereby the presence of microplastics promotes the accumulation of microalgae, and they discovered the existence of a second mechanism, hitherto unknown.

Left: image of microplastics in microalgae assemblies.
On the right is the study of the phenomenon by Fouad. © Demir-Yilmaz et al.

The pollution (Pollution is defined as what makes the environment unhealthy. The definition varies depending on…) By means of plastic affects all walks of life. Microplastics enter the marine food chains in particular, and then ascend to the largest animals andman (The man is an adult male of the type called modern man (Homo…). interactions with Plankton (Homer called the animals that wander on the surface of the waves plankton, from the Greek…) They seem particularly important, but they are still not well understood. Microalgae that make up most of the plankton and the first Link (Link in nautical language is the length of the chain (the anchor line) that measures 15…) subordinate food chain (A food chain is a chain of organisms in which everyone who eats them eats…) aquatic, may congregate under certain conditions. However, microplastics cause the formation of these aggregates, where they mix and thus transfer to animals or spread to the depths oceans (Oceans stylized Ωceans is a French documentary film directed by…). In fact, heavier aggregates sink rather than float.

Researchers from the Toulouse Institute of Biotechnology, Bio-Chemical Engineering (TBI, CNRS / INSA Toulouse / INRAE), Laboratory of Analysis andArchitectural Engineering (Architecture can be defined as the art of building construction.) Systems (LAAS-CNRS), Molecular Interactions and Laboratory for Chemical and Photoreaction (IMRCP, CNRS/University of Toulouse/Paul Sabatier) have shown that microplastics promote, in two different ways, the formation of planktonic pools to which they then bind. mix up. Published in the magazine college ecologyThis work is based on a new, centered methodology Around (Autour is the name you give the naming of birds in French (updated)…) from one Atomic force microscope (Atomic force microscopy (or AFM for atomic force microscope) is a derivative of microscope…) (AFM).

Microalgae emit extracellular polymeric substances (EPS), a together (In set theory, a set intuitively identifies a set…) From the carbohydrates, proteins, and nucleic acids you use to colonize hard surfaces and cause their buildup. Co-authors and co-authors confirmed that the presence of plastic particles enhanced EPS production. This has already been observed, but the team also showed that even by completely removing the EPS, the microalgae still collected more in the presence of the microplastics. This time it is this phenomenon that is caused by direct contacts, by hydrophobic interactions between the microplastics and the cell wall. Part of the team is now studying whether micro and nanoplastics, once ingested by animals or humans, can be absorbed by the body and what consequences this can have for the body. health (Health is a state of complete physical, mental and social well-being, and is not…).

The role of microplastics in microalgae cell pool: a study at the molecular level using atomic force microscopy.
Erim Demir Yilmaz, Nadia Yakovenko, Clément Roux, Pascal Giroud, Fabrice Colin, Christophe Caudret, Alexandra Ter-Halle, Cecil Formosa-Dagh. college ecology2022.

– Cecil Formosa Dag – Responsible for Research (Scientific research identifies in the first place all actions taken with a view to …) to me CNRS (The National Center for Scientific Research, better known by the acronym CNRS, is the largest…)Toulouse Institute of Biotechnology (CNRS / Inrae / Insa Toulouse) – Formosa at insa-toulouse.fr
Telecommunications (Contact with man (communication within oneself, communication between people, etc.) INSIS – Contact cnrs.fr

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