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Area of Science:

  • Marine Biology
  • Fluid Dynamics
  • Biophysics

Background:

  • Marine plankton possess flow sensors to perceive their environment.
  • Turbulence presents challenges and opportunities for plankton movement.

Purpose of the Study:

  • To investigate if marine plankton can utilize flow information to enhance vertical travel speed in turbulent conditions.
  • To explore the potential for plankton to exploit turbulence for navigation.

Main Methods:

  • Development of a physics-based model for plankton swimming behavior.
  • Numerical simulations to analyze plankton movement in simulated turbulence.
  • Investigation of a robust analytical behavior for direction selection based on local flow gradients.

Main Results:

  • Plankton employing the proposed behavior can effectively 'surf' on turbulence.
  • Net vertical speeds up to twice the organism's swimming speed were achieved.
  • The model demonstrates a strategy for enhanced vertical migration in turbulent flows.

Conclusions:

  • Planktonic organisms can exploit turbulence features for improved navigation and faster vertical transit.
  • Flow sensing is a crucial mechanism for plankton to actively utilize turbulent environments.
  • This study provides a novel perspective on plankton-hydrodynamics interactions and ecological strategies.