期刊
MARINE POLLUTION BULLETIN
卷 119, 期 1, 页码 255-261出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2017.03.065
关键词
Microplastic; Ingestion; Macoma balthica; Monoporeia affinis; Marenzelleria spp.
资金
- Walter and Andree de Nottbeck Foundation
- Finnish Foundation for Nature Conservation
- Societas Biologica Fennica Vanamo
- Ministry of Environment (MERIROSKA)
Microplastics (MPs) are observed to be present on the seafloor ranging from coastal areas to deep seas. Because bioturbation alters the distribution of natural particles on inhabited soft bottoms, a mesocosm experiment with common benthic invertebrates was conducted to study their effect on the distribution of secondary MPs (different-sized pieces of fishing line < 1 mm). During the study period of three weeks, the benthic community increased MP concentration in the depth of 1.7-5.1 cm in the sediment. The experiment revealed a clear vertical gradient in MP distribution with their abundance being highest in the uppermost parts of the sediment and decreasing with depth. The Baltic clam Macoma balthica was the only study animal that ingested MPs. This study highlights the need to further examine the vertical distribution of MPs in natural sediments to reliably assess their abundance on the seafloor as well as their potential impacts on benthic communities.
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