Impacts of microplastic vs. natural abiotic particles on the clearance rate of a marine mussel

In coastal habitats, mussels are exposed to microplastics (MP; plastic 0.1 μm–5 mm) and silt, two abiotic particles that are similarly sized and lack nutrition. The addition of MP or silt may change the functional response of mussels. We measured clearance rate (CR) of Mytilus trossulus in three particle treatments (algae, MP + algae, and silt + algae) across four concentrations to (1) determine if the effects of MP and silt are similar and (2) disentangle the effects of particle type, particle concentration, and proportion of abiotic particles. CR decreased by 62% at high MP concentrations (> 1250 particles mL−1) but was not affected at equivalent silt concentrations. These findings suggest high MP concentrations inhibit mussel CR, more than expected by changes in particle concentration or the proportion of abiotic particles. As plastic production increases, mussel exposure to MP will increase, potentially reducing energy transfer, benthic‐pelagic coupling, and water clarity.

• Publication year

  2019

• Venue

  Limnology and Oceanography Letters

• Publication date

  2019-10-01

• Fields of study

  Environmental Science

• Identifiers
  DOI 10.1002/lol2.10120
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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