ORCID
- R. C. Thompson: 0000-0003-2262-6621
Abstract
Inappropriate disposal of plastic debris has led to the contamination of marine habitats worldwide. This debris can be ingested by organisms; however, the extent to which chewing and gut transit modifies plastic debris is unclear. Detritivores, such as amphipods, ingest and shred natural organic matter and are fundamental to its breakdown. Here we examine ingestion and shredding of plastic carrier bags by Orchestia gammarellus. A laboratory experiment showed these amphipods shredded plastic carrier bags, generating numerous microplastic fragments (average diameter 488.59 μm). The presence of a biofilm significantly increased the amount of shredding, but plastic type (conventional, degradable and biodegradable) had no effect. Subsequent field observations confirmed similar shredding occurred on the strandline. Rates of shredding will vary according to amphipod density; however, our data indicates that shredding by organisms could substantially accelerate the formation microplastics in the environment.
DOI
10.1016/j.marpolbul.2017.11.057
Publication Date
2018-02-01
Publication Title
Marine Pollution Bulletin
Volume
127
ISSN
0025-326X
Embargo Period
2019-12-06
Keywords
Biofouling, Litter, Microplastic, Polyethylene, Polymers, Single-use carrier-bags
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
First Page
154
Last Page
159
Recommended Citation
Hodgson, D., Bréchon, A., & Thompson, R. (2018) 'Ingestion and fragmentation of plastic carrier bags by the amphipod Orchestia gammarellus: Effects of plastic type and fouling load', Marine Pollution Bulletin, 127, pp. 154-159. Available at: https://doi.org/10.1016/j.marpolbul.2017.11.057
