Auswirkungen von Mikroplastik auf die Grünlippmuschel Perna by Sinja Rist

By Sinja Rist

Rist untersucht die Auswirkungen von Mikroplastik, das in marinen Sedimenten
weltweit verbreitet ist, auf die Grünlippmuschel Perna viridis. Sie zeigt, dass
nach einer 6-wöchigen Exposition im exertions mit steigender Partikelzahl starke
Einschränkungen physiologischer Funktionen wie Filtration, Atmung, Bewegung und
Byssusproduktion sowie eine erhöhte Mortalität auftreten. Signifikante Effekte
waren dabei schon bei geringen Partikelmengen messbar. Insgesamt lassen die
Ergebnisse dieser Studie auf eine deutliche Dezimierung der Energiereserven der
Muscheln schließen. Die Kontamination der Partikel mit dem organischen
Schadstoff Fluoranthen hatte dagegen keinen eindeutig messbaren Effekt auf die
Tiere. Diese Studie verdeutlicht, dass im Angesicht einer steigenden
Mikroplastikbelastung benthischer Habitate mit diversen Auswirkungen auf die
Organismen gerechnet werden muss.

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