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Citizen science sampling programs as a technique for monitoring microplastic pollution: results, lessons learned and recommendations for working with volunteers for monitoring plastic pollution in freshwater ecosystems

Environmental Monitoring and Assessment volume 191, Article number: 172 (2019) Cite this article

Abstract

A citizen science microplastic monitoring method was developed to engage the public and quantify microplastic contamination at various sites along an approximately 550 km length of the Ottawa River from Lake Temiskaming to Hawkesbury, Ontario, Canada. The volunteers filtered 100 L of river water through a 100-μm mesh at their desired location along the Ottawa River. All but one of the river samples (n = 43) contained microplastics, with the vast majority of microplastics identified as microfibers. Microplastic concentrations ranged from 0.02 to 0.41 microplastic pieces per litre. We noted numerous advantages in working with citizen scientists including actively engaging citizens in the research, ease of recruiting volunteers within the established Ottawa Riverkeeper network, and expanded spatial coverage at minimal additional costs. Despite these important advantages, there are some important considerations with citizen scientist sampling including the rare events where volunteers mislabelled sample sheets (e.g. labelling as control instead of river sample) and the relatively low volume of water (100 L) that the volunteers could easily sample using our methodology. Recommendations for future citizen science projects for freshwater microplastic research include utilising an established and engaged network, running both field and lab control samples (blanks) to obtain estimates of contamination with microplastic fibres, and increasing the amount of water filtered to obtain more reliable estimates of microplastic pollution in our freshwater ecosystems.

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Authors and Affiliations

  1. Department of Geography and Environmental Studies, Carleton University, 1125 Colonel By Drive, Ottawa, ON, K1S 5B6, Canada

    Shaun A. Forrest & Jesse C. Vermaire

  2. Ottawa Riverkeeper, 301-275, Bay Street, Ottawa, ON, K1R 5Z5, Canada

    Larissa Holman & Meaghan Murphy

  3. Institute for Environmental and Interdisciplinary Sciences, Carleton University, 1125 Colonel By Drive, Ottawa, ON, K1S 5B6, Canada

    Jesse C. Vermaire

Authors
  1. Shaun A. Forrest
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  2. Larissa Holman
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  3. Meaghan Murphy
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  4. Jesse C. Vermaire
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Correspondence to Shaun A. Forrest.

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Forrest, S.A., Holman, L., Murphy, M. et al. Citizen science sampling programs as a technique for monitoring microplastic pollution: results, lessons learned and recommendations for working with volunteers for monitoring plastic pollution in freshwater ecosystems. Environ Monit Assess 191, 172 (2019). https://doi.org/10.1007/s10661-019-7297-3

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