Journal article

Publication year: 2018

Pages: 955-960

Journal: Environmental Pollution

Volume number: 237

ISSN: 0269-7491

DOI Link: https://doi.org/10.1016/j.envpol.2017.11.006

Publisher: Elsevier

Abstract: 
Pollution of marine environments with microplastic particles (i.e. plastic fragments <5 mm) has increased rapidly during the last decades. As these particles are mainly of terrestrial origin, coastal ecosystems such as coral reefs are particularly threatened. Recent studies revealed that microplastic ingestion can have adverse effects on marine invertebrates. However, little is known about its effects on small-polyp stony corals that are the main framework builders in coral reefs. The goal of this study is to characterise how different coral species I) respond to microplastic particles and whether the exposure might II) lead to health effects. Therefore, six small-polyp stony coral species belonging to the genera Acropora, Pocillopora, and Porites were exposed to microplastics (polyethylene, size 37-163 mu m, concentration ca. 4000 particles L-1) over four weeks, and responses and effects on health were documented.The study showed that the corals responded differentially to microplastics. Cleaning mechanisms (direct interaction, mucus production) but also feeding interactions (i.e. interaction with mesenterial filaments, ingestion, and egestion) were observed. Additionally, passive contact through overgrowth was documented. In five of the six studied species, negative effects on health (i.e. bleaching and tissue necrosis) were reported.We here provide preliminary knowledge about coral-microplastic-interactions. The results call for further investigations of the effects of realistic microplastic concentrations on growth, reproduction, and survival of stony corals. This might lead to a better understanding of resilience capacities in coral reef ecosystems. (C) 2017 Elsevier Ltd. All rights reserved.

Harvard Citation style: Reichert, J., Schellenberg, J., Schubert, P. and Wilke, T. (2018) Responses of reef building corals to microplastic exposure, Environmental Pollution, 237, pp. 955-960. https://doi.org/10.1016/j.envpol.2017.11.006

APA Citation style: Reichert, J., Schellenberg, J., Schubert, P., & Wilke, T. (2018). Responses of reef building corals to microplastic exposure. Environmental Pollution. 237, 955-960. https://doi.org/10.1016/j.envpol.2017.11.006