Morphological and mechanical properties of blades of Saccharina latissima

Davide Vettori*, Vladimir Nikora

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Citations (Scopus)
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Abstract

Interactions between water flow and aquatic vegetation strongly depend on morphological and biomechanical characteristics of vegetation. Although any physical or numerical model that aims to replicate flow-vegetation interactions requires these characteristics, information on morphology and mechanics of vegetation living in coastal waters remains insufficient. The present study investigates the mechanical properties of blades of Saccharina latissima, a seaweed species spread along the shores of the UK and North East Atlantic. More than 50 seaweed samples with lengths spanning from 150 mm to 650 mm were collected from Loch Fyne (Scotland) and tested. Seaweed blades had a natural ‘stretched droplet’ shape with bullations in the central fascia and ruffled edges in the area close to the stipe. Their morphological features showed high variability for samples longer than 400 mm. The blades were almost neutrally buoyant, their material was found to be very flexible and ductile, being stiffer in longer blades. The laboratory tests showed that estimates of tensile Young's modulus appeared to be similar to bending Young's modulus suggesting a reasonable degree of isotropy in studied seaweed tissues.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalEstuarine, Coastal and Shelf Science
Volume196
Early online date28 Jun 2017
DOIs
Publication statusPublished - 5 Sep 2017

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Keywords

  • Brown alga
  • Elasticity
  • Mechanical properties
  • Organism morphology
  • Saccharina latissima
  • Scotland

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science

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