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Quantitative evaluation of microplastics in colonies of Phragmatopoma caudata Krøyer in Mörch, 1863 (Polychaeta-Sabellariidae): Analysis in sandcastles and tissues and identification via Raman spectroscopy
Summary
Researchers found microplastics embedded in the sand tubes and body tissues of Phragmatopoma caudata, a tube-building marine worm that constructs its home from sand grains. This study shows that filter-feeding and sediment-associated organisms incorporate microplastics into their structures, spreading plastic contamination through marine ecosystems.
The detection of microplastics in all world oceans, including the most remote, has become a major concern as this will substantially increase the possibility of interactions between these particles and the marine biota. Due to their small size, microplastics can be ingested by many marine species including invertebrates, causing physical damage. This study was the first evaluation of the occurrence and abundance of microplastics in three sample types related to the species Phragmatopoma caudata, (i.e. colony wash water, tubes and digested tissue from specimens). In total, 2118 samples of microplastics were quantified, with 1516 obtained from the wash water, 447 from the fragmented tubes and 155 from the digested tissue. Three types of microplastics were chemically identified via Raman Spectroscopy as polyethylene, polypropylene and polyethylene terephthalates. Overall, this study demonstrated that microplastics are abundantly bioavailable in the studied area and are present as filament and fragment shapes.