Open AccessImpacts of microplastic vs. natural abiotic particles on the clearance rate of a marine mussel
Author(s) -
Harris Lyda S. T.,
Carrington Emily
Publication year - 2020
Publication title -
limnology and oceanography letters
Language(s) - English
Resource type - Journals
ISSN - 2378-2242
DOI - 10.1002/lol2.10120
Subject(s) - mussel , abiotic component , silt , benthic zone , mytilus , clearance rate , algae , seston , environmental chemistry , pelagic zone , particle (ecology) , microplastics , ecology , biology , environmental science , chemistry , nutrient , phytoplankton , paleontology , endocrinology
In coastal habitats, mussels are exposed to microplastics (MP; plastic 0.1 μ m–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.