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Defining Plastic Pollution Hotspots

2023 1 citation ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Paolo Tasseron Tim van Emmerik, Paolo Tasseron Paolo Tasseron Paolo Tasseron Yvette Mellink, Tim van Emmerik, Yvette Mellink, Rahel Hauk, Yvette Mellink, Yvette Mellink, Tim van Emmerik, Yvette Mellink, Paul Vriend, Tim van Emmerik, Paul Vriend, Paul Vriend, Paul Vriend, Paul Vriend, Paul Vriend, Tim van Emmerik, Paul Vriend, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Paul Vriend, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Paolo Tasseron Tim van Emmerik, Tim van Emmerik, Rahel Hauk, Paolo Tasseron Tim van Emmerik, Paolo Tasseron Tim van Emmerik, Paul Vriend, Martine van der Ploeg, Martine van der Ploeg, Yvette Mellink, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Rahel Hauk, Tim van Emmerik, Rahel Hauk, Rahel Hauk, Rahel Hauk, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Paolo Tasseron Paolo Tasseron Yvette Mellink, Martine van der Ploeg, Yvette Mellink, Paul Vriend, Paul Vriend, Paul Vriend, Paul Vriend, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Rahel Hauk, Rahel Hauk, Rahel Hauk, Martine van der Ploeg, Martine van der Ploeg, Martine van der Ploeg, Paul Vriend, Paul Vriend, Paul Vriend, Yvette Mellink, Yvette Mellink, Yvette Mellink, Tim van Emmerik, Paul Vriend, Tim van Emmerik, Rahel Hauk, Martine van der Ploeg, Martine van der Ploeg, Paul Vriend, Rahel Hauk, Tim van Emmerik, Tim van Emmerik, Paolo Tasseron Tim van Emmerik, Rahel Hauk, Tim van Emmerik, Rahel Hauk, Francesca Alberti, Paolo Tasseron Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Rahel Hauk, Yvette Mellink, Tim van Emmerik, Yvette Mellink, Tim van Emmerik, Tim van Emmerik, Martine van der Ploeg, Tim van Emmerik, Rahel Hauk, Martine van der Ploeg, Martine van der Ploeg, Tim van Emmerik, Paul Vriend, Martine van der Ploeg, Tim van Emmerik, Paul Vriend, Tim van Emmerik, Tim van Emmerik, Yvette Mellink, Tim van Emmerik, Martine van der Ploeg, Paul Vriend, Martine van der Ploeg, Martine van der Ploeg, Martine van der Ploeg, Martine van der Ploeg, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Martine van der Ploeg, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Martine van der Ploeg, Martine van der Ploeg, Martine van der Ploeg, Martine van der Ploeg, Martine van der Ploeg, Martine van der Ploeg, Martine van der Ploeg, Rahel Hauk, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Tim van Emmerik, Paolo Tasseron

Summary

This methodological paper reveals that defining a plastic pollution "hotspot" leads to wildly different results depending on the definition used — the proportion of locations identified as hotspots ranges from 0.8% to 93.3% depending on the statistical threshold applied. Because effective plastic pollution policy and cleanup prioritization depend on reliably identifying hotspots, the authors propose a step-wise framework requiring researchers to specify purpose, spatial scale, temporal scale, and threshold criteria before designating any area as a hotspot. Standardizing this terminology is essential for comparing studies and allocating limited remediation resources.

Plastic pollution in the natural environment poses a growing threat to ecosystems and human health, prompting urgent needs for monitoring, prevention and clean-up measures, and new policies. To effectively prioritize resource allocation and mitigation strategies, it is key to identify and define plastic hotspots. UNEP’s draft global agreement on plastic pollution mandates prioritizing hotspots, suggesting a potential need for a defined term. Yet, the delineation of hotspots varies considerably across plastic pollution studies, and a definition is often lacking or inconsistent without a clear purpose and boundaries of the term. In this paper, we applied four common hotspot definitions to plastic pollution datasets ranging from urban areas to a global scale. Our findings reveal that these hotspot definitions encompass between 0.8% to 93.3% of the total plastic pollution, covering <0.1% to 50.3% of the total locations. Given this wide range of results and the possibility of temporal inconsistency in hotspots, we emphasize the need for fit-for-purpose criteria and a unified approach to defining plastic hotspots. Therefore, we designed a step-wise framework to define hotspots by determining the purpose, units, spatial scale, temporal scale, and threshold values. Incorporating these steps in research and policymaking yields a harmonized definition of hotspots, facilitating the development of effective plastic pollution prevention and reduction measures.

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