Effect of micro-plastic particles on coral reef foraminifera.

Autor: Zientek A; Department of Palaeontology, University of Vienna, Vienna, Austria., Schagerl M; Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria., Nagy M; Department of Palaeontology, University of Vienna, Vienna, Austria., Wanek W; Department of Microbiology and Ecosystem Science, University of Vienna, Vienna, Austria., Heinz P; Department of Palaeontology, University of Vienna, Vienna, Austria. petra.heinz@univie.ac.at., Ali SS; Botany Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt., Lintner M; ING PAN - Institute of Geological Sciences, Polish Academy of Sciences, Research Centre in Krakow, Krakow, Poland.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 May 30; Vol. 14 (1), pp. 12423. Date of Electronic Publication: 2024 May 30.
DOI: 10.1038/s41598-024-63208-3
Abstrakt: Foraminifera are single-celled protists which are important mediators of the marine carbon cycle. In our study, we explored the potential impact of polystyrene (PS) microplastic particles on two symbiont-bearing large benthic foraminifera species-Heterostegina depressa and Amphistegina lobifera-over a period of three weeks, employing three different approaches: investigating (1) stable isotope (SI) incorporation-via 13 C- and 15 N-labelled substrates-of the foraminifera to assess their metabolic activity, (2) photosynthetic efficiency of the symbiotic diatoms using imaging PAM fluorometry, and (3) microscopic enumeration of accumulation of PS microplastic particles inside the foraminiferal test. The active feeder A. lobifera incorporated significantly more PS particles inside the cytoplasm than the non-feeding H. depressa, the latter accumulating the beads on the test surface. Photosynthetic area of the symbionts tended to decrease in the presence of microplastic particles in both species, suggesting that the foraminiferal host cells started to digest their diatom symbionts. Compared to the control, the presence of microplastic particles lead to reduced SI uptake in A. lobifera, which indicates inhibition of inorganic carbon and nitrogen assimilation. Competition for particulate food uptake was demonstrated between algae and microplastic particles of similar size. Based on our results, both species seem to be sensitive to microplastic pollution, with non-feeding H. depressa being more strongly affected.
(© 2024. The Author(s).)
Databáze: MEDLINE
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