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Microplastic data from surface waters and in stream-rearing steelhead trout (Oncorhynchus mykiss) in a rural coastal California stream

Zenodo (CERN European Organization for Nuclear Research) 2026
Lindsay E. Hansen, Rosealea M. Bond, Joseph Kiernan

Summary

This dataset entry describes microplastic measurements from the water and the gut contents of juvenile steelhead trout in Scott Creek, a rural California coastal stream, providing baseline contamination data for a salmon-bearing watershed with minimal urban influence. Even in relatively pristine, low-traffic streams, microplastics are present and entering fish, suggesting contamination is pervasive in California waterways regardless of urbanization level. The data supports evaluation of ecological risks to native fish species that are already under pressure from other stressors.

Body Systems

This dataset supports the study of microplastic pollution in Scott Creek, a small coastal watershed in California, USA. It includes measurements of suspended microplastic in surface waters and the gastrointestinal (GI) tracts of juvenile Steelhead Trout (Oncorhynchus mykiss). Data include microplastic particle counts, types (fibers, fragments, shards, foams), colors, and sizes (<5 mm), collected across multiple sites and months. The dataset provides baseline information on microplastic occurrence in a minimally urbanized, salmon-bearing stream, offering critical context for evaluating ecological risks to native fish populations.

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