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Dispersion/dilution enhances phytoplankton blooms in low-nutrient waters

Author

Listed:
  • Yoav Lehahn

    (Weizmann Institute of Science)

  • Ilan Koren

    (Weizmann Institute of Science)

  • Shlomit Sharoni

    (Weizmann Institute of Science)

  • Francesco d’Ovidio

    (Sorbonne Universités (UPMC, Université Paris 06)-CNRS-IRD-MNHN, LOCEAN-IPSL Laboratory)

  • Assaf Vardi

    (Weizmann Institute of Science)

  • Emmanuel Boss

    (School of Marine Sciences, University of Maine)

Abstract

Spatial characteristics of phytoplankton blooms often reflect the horizontal transport properties of the oceanic turbulent flow in which they are embedded. Classically, bloom response to horizontal stirring is regarded in terms of generation of patchiness following large-scale bloom initiation. Here, using satellite observations from the North Pacific Subtropical Gyre and a simple ecosystem model, we show that the opposite scenario of turbulence dispersing and diluting fine-scale (∼1–100 km) nutrient-enriched water patches has the critical effect of regulating the dynamics of nutrients–phytoplankton–zooplankton ecosystems and enhancing accumulation of photosynthetic biomass in low-nutrient oceanic environments. A key factor in determining ecological and biogeochemical consequences of turbulent stirring is the horizontal dilution rate, which depends on the effective eddy diffusivity and surface area of the enriched patches. Implementation of the notion of horizontal dilution rate explains quantitatively plankton response to turbulence and improves our ability to represent ecological and biogeochemical processes in oligotrophic oceans.

Suggested Citation

  • Yoav Lehahn & Ilan Koren & Shlomit Sharoni & Francesco d’Ovidio & Assaf Vardi & Emmanuel Boss, 2017. "Dispersion/dilution enhances phytoplankton blooms in low-nutrient waters," Nature Communications, Nature, vol. 8(1), pages 1-8, April.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms14868
    DOI: 10.1038/ncomms14868
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    Cited by:

    1. Enrico Ser-Giacomi & Ricardo Martinez-Garcia & Stephanie Dutkiewicz & Michael J. Follows, 2023. "A Lagrangian model for drifting ecosystems reveals heterogeneity-driven enhancement of marine plankton blooms," Nature Communications, Nature, vol. 14(1), pages 1-12, December.

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