High concentrations of floating neustonic life in the plastic-rich North Pacific Garbage Patch

PLoS Biol. 2023 May 4;21(5):e3001646. doi: 10.1371/journal.pbio.3001646. eCollection 2023 May.

Abstract

Floating life (obligate neuston) is a core component of the ocean surface food web. However, only 1 region of high neustonic abundance is known so far, the Sargasso Sea in the Subtropical North Atlantic gyre, where floating life provides critical habitat structure and ecosystem services. Here, we hypothesize that floating life is also concentrated in other gyres with converging surface currents. To test this hypothesis, we collected samples through the eastern North Pacific Subtropical Gyre in the area of the North Pacific "Garbage Patch" (NPGP) known to accumulate floating anthropogenic debris. We found that densities of floating life were higher inside the central NPGP than on its periphery and that there was a positive relationship between neuston abundance and plastic abundance for 3 out of 5 neuston taxa, Velella, Porpita, and Janthina. This work has implications for the ecology of subtropical oceanic gyre ecosystems.

MeSH terms

  • Animals
  • Ecology
  • Ecosystem
  • Environmental Monitoring
  • Garbage*
  • Hydrozoa*
  • Pacific Ocean
  • Plastics

Substances

  • Plastics

Grants and funding

This work was supported by the United States National Aeronautics and Space Administration grants (80NSSC21K0857 to NM, JH, and RH; 80NSSC17K0559 to NM and JH; and NNX17AH43G to NM and JH). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.