2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/20/2019 | 2:30 PM - 2:45 PM | THE TRANSPORT AND RETENTION OF MICROPLASTIC FIBERS IN EXPERIMENTAL STREAMS WITH VARYING BENTHIC SUBSTRATE, DISCHARGE, AND BENTHIC BIOFILM COLONIZATION | 251 AB
THE TRANSPORT AND RETENTION OF MICROPLASTIC FIBERS IN EXPERIMENTAL STREAMS WITH VARYING BENTHIC SUBSTRATE, DISCHARGE, AND BENTHIC BIOFILM COLONIZATION
Microplastics (particles <5mm) represent emerging pollutants of concern in ecosystems worldwide. Data on microplastic transport in lotic ecosystems is needed to assess the role streams play in global microplastic budgets. We adapted spiraling metrics designed to measure particle transport to quantify microplastic retention in experimental streams at the Notre Dame Linked Experimental Ecosystem Facility (ND-LEEF). We explored how benthic substrate size and configuration (cobble, pea-gravel, sand, mixed substrate), stream discharge (high, low), and benthic biofilm (established colonization, post-scouring) affect microplastic deposition using a fully-crossed design. In three replicate reaches per treatment, we released pulses of microplastic fibers and collected synchronized water samples downstream. Afterwards, we collected benthic biofilm and sediment samples. We quantified microplastics from water, biofilm, and substrate using a dissecting microscope. Late colonization biofilms increased microplastic retention in streams with larger substrate (cobble and pea-gravel) by approximately 300% but did not influence retention in the substrates containing sand (sand and mixed). These results provide insights into the factors that influence microplastic retention in streams and will be useful for parameterizing models that can scale microplastic depositional patterns to larger rivers and over longer time scales.
- Aquatic-terrestrial Linkage
- Nanomaterials
- Connectivity
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Presenters/Authors
Elizabeth Berg
(), Loyola University Chicago, eberg@luc.edu;
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Anna Vincent
(), University of Notre Dame, avincen5@nd.edu;
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Arial Shogren
(), Department of Earth and Environmental Sciences, Michigan State University, shogrena@msu.edu;
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Martha Dee
(), University of Notre Dame, mdee@nd.edu;
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Jennifer L. Tank
(), University of Notre Dame, tank.1@nd.edu;
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John Kelly
(), Loyola University Chicago, Jkelly7@luc.edu;
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Timothy Hoellein
(), Loyola University Chicago, thoellein@luc.edu;
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