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Natural infochemical DMSP stimulates the transfer of microplastics from freshwater zooplankton to fish: An olfactory trap

Aquatic Toxicology 2023 2 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 30 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Wei Yang, Yuyue Huang, Elvis Genbo Xu Elvis Genbo Xu Yuyue Huang, Elvis Genbo Xu Yuyue Huang, Yuyue Huang, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Qian Tan, Qian Tan, Qian Tan, Qian Tan, Wei Li, Wei Li, Qian Tan, Qian Tan, Qian Tan, Qian Tan, Wei Yang, Elvis Genbo Xu Wei Li, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Wei Yang, Wei Li, Shenhua Qian, Elvis Genbo Xu Elvis Genbo Xu Wei Li, Elvis Genbo Xu Elvis Genbo Xu Yuyue Huang, Elvis Genbo Xu Elvis Genbo Xu Yuyue Huang, Yuyue Huang, Yuyue Huang, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Shenhua Qian, Elvis Genbo Xu Yuyue Huang, Elvis Genbo Xu Xizi Long, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Wei Li, Qian Tan, Xizi Long, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Xizi Long, Wei Yang, Shenhua Qian, Shenhua Qian, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Wei Li, Elvis Genbo Xu Wei Li, Elvis Genbo Xu Xizi Long, Qian Tan, Qian Tan, Xizi Long, Elvis Genbo Xu Elvis Genbo Xu Qian Tan, Qian Tan, Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu Elvis Genbo Xu

Summary

Researchers found that the natural algal chemical DMSP stimulates zooplankton to ingest more microplastics and then transfer them to fish through predation — acting as an olfactory trap. This unexpected mechanism accelerates the trophic transfer of microplastics through freshwater food chains, potentially increasing microplastic accumulation in fish consumed by humans.

Models

Zebrafish

Study Type Environmental

Natural infochemicals may largely affect the trophic transfer of microplastics (MPs) in ecosystems but such infochemical effect and mechanisms are poorly understood. Here, a daphnids-zebrafish freshwater microcosm was designed to elucidate whether and how an algae-derived infochemical, dimethylsulfoniopropionate (DMSP), affects the ingestion and transfer of MPs. Daphnids fast accumulated DMSP and MPs from water, and DMSP in daphnids was mainly enriched from the DMSP in water but not from MPs. DMSP did not change the MP ingestion by daphnids. A low concentration of DMSP (0.5 nM) increased predation of daphnids by zebrafish, while high concentrations of DMSP (50, 100 and 200 nM) did not increase predation rates. The concentration of DMSP in daphnids and the MP predation by zebrafish showed a unimodal relationship. The predation for MP by zebrafish in the 0.5 and 5 nM DMSP treatments was 1.89 and 1.56 times that of the control, respectively. The concentrations of DMSP in freshwater samples were lower than 50 nM. This suggests DMSP at environmentally relevant concentrations may promote the trophic transfer of MPs in freshwater ecosystems via olfactory traps.

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