Fate of microplastic captured in the marine demosponge Halichondria panicea.

Autor: Funch P; Department of Biology, Genetics, Ecology, and Evolution, Aarhus University, Denmark. Electronic address: funch@bio.au.dk., Kealy RA; Marine Biological Research Centre, Department of Biology, University of Southern Denmark, Denmark; Danish Molecular Biomedical Imaging Center (DaMBIC), University of Southern Denmark, Denmark., Goldstein J; Department of Biology, Genetics, Ecology, and Evolution, Aarhus University, Denmark; Marine Biological Research Centre, Department of Biology, University of Southern Denmark, Denmark; Danish Molecular Biomedical Imaging Center (DaMBIC), University of Southern Denmark, Denmark., Brewer JR; Danish Molecular Biomedical Imaging Center (DaMBIC), University of Southern Denmark, Denmark., Solovyeva V; Danish Molecular Biomedical Imaging Center (DaMBIC), University of Southern Denmark, Denmark; Department of Physics, Carl von Ossietzky University of Oldenburg, Germany., Riisgård HU; Marine Biological Research Centre, Department of Biology, University of Southern Denmark, Denmark.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2023 Sep; Vol. 194 (Pt A), pp. 115403. Date of Electronic Publication: 2023 Aug 14.
DOI: 10.1016/j.marpolbul.2023.115403
Abstrakt: Microplastic particles are widespread pollutants in the sea and filter-feeding sponges have recently been suggested as useful monitoring organisms. However, the fate of microplastic particles in sponges is poorly understood, yet crucial for interpreting monitoring data. The present study aims to help develop sponges as more useful monitoring organisms for microplastic in the sea. Here, we describe the fate of inedible (2 and 10 μm) plastic beads compared to that of edible bacteria and algal cells captured in the marine demosponge Halichondria panicea. Small Cyanobium bacillare cells entered the choanocyte chambers and were phagocytized by choanocytes, while larger Rhodomonas salina cells were captured in incurrent canals and phagocytized in the mesohyl. Small 2 μm-beads were captured by choanocytes and subsequently expelled into the excurrent canals after 58 ± 34 min. Larger 10 μm-beads were captured in the incurrent canals and transferred to the mesohyl, where amoeboid cells moved them across the mesohyl before they were expelled into the excurrent canal after 95 ± 36 min. SEM observations further indicated engulfment of plastic beads on the outer sponge surface. This insight provides useful information on how sponges, in general, treat microplastic particles of various sizes. It helps us understand actual measured sizes and concentrations of microplastic particles in sponges in relation to those in the ambient water.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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