Journal
JOURNAL OF PHYCOLOGY
Volume 36, Issue 3, Pages 453-472Publisher
WILEY-BLACKWELL
DOI: 10.1046/j.1529-8817.2000.99139.x
Keywords
biomechanics; hydrodynamics; macroalgae; mass transfer; nutrients; photosynthesis; primary production; resource allocation; seawater velocity; seaweed; turbulence; water motion; wave-action
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Water motion is a key determinant of marine macroalgal production, influencing directly or indirectly physiological rates and community structure, Our understanding of how marine macroalgae interact with their hydrodynamic environment has increased substantially over the past 20 gears, due to the application of tools such as flow visualization to aquatic vegetation, and in situ measurements of seawater velocity and turbulence, This review considers how the hydrodynamic environment in which macroalgae grow influences their ability to acquire essential resources and how macroalgae might respond physiologically to fluctuations in their hydrodynamic regime with a focus on: (1) the biochemical processes occurring within the diffusion boundary layer (DBL) that might reduce rates of macroalgal production; (2) time scales over which measurements of velocity and DBL processes should be made, discussing the likelihood of in situ mass transfer limitation; (3) if and how macroalgal morphology influences resource acquisition in slow flows; and (4) ecobiomechanics and how hydrodynamic drag might influence resource acquisition and allocation, Finally, the concept that macroalgal production is enhanced in wave-exposed versus sheltered habitats is discussed.
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