Details
| Original language | English |
|---|---|
| Pages (from-to) | 73-80 |
| Number of pages | 8 |
| Journal | Coastal engineering |
| Volume | 84 |
| Early online date | 10 Dec 2013 |
| Publication status | Published - Feb 2014 |
Abstract
Aquatic vegetation interacts with the flow by posing an obstruction and in return experiences drag and is reconfigured by acting forces. It is suggested that plant buoyancy and stiffness affect these bio-physical interactions and hence should be considered when including vegetation in physical and numerical hydrodynamic models. However, data on these parameters is either lacking for many species or existing information is insufficient to model flexible aquatic vegetation correctly. Previous studies have focused on plant stems, but did not take plant foliage into account. The present study extends the existing knowledge base by providing data for four northern European brown macroalgae and also provides a comparison between the mechanical properties of stem and blade tissue for these species. Specimens of Alaria esculenta, Laminaria digitata, Fucus serratus and Fucus vesiculosus were collected from a small tidal inlet in Norway. Other than F. serratus, the macroalgae were positively buoyant and all stems showed bending moduli in agreement with previous studies with respect to their order of magnitude. Only L. digitata exhibited a significant difference between bending moduli for stems and blades and also between the tip and the base of the blades. However, there were differences in flexural rigidities (product of bending modulus and second moment of cross-sectional area) of both stems and blades and the tip and the base of blades of all but F. serratus. This highlights the important influence of cross-sectional area and cross-sectional shape on stiffness.
Keywords
- Bending modulus, Brown macroalgae, Buoyancy, Flexural rigidity
ASJC Scopus subject areas
- Environmental Science(all)
- Environmental Engineering
- Engineering(all)
- Ocean Engineering
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In: Coastal engineering, Vol. 84, 02.2014, p. 73-80.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Geometrical and mechanical properties of four species of northern European brown macroalgae
AU - Paul, M.
AU - Henry, P. Y.T.
AU - Thomas, R. E.
N1 - Funding Information: The work described in this publication was supported by the European Community's 7th Framework Programme through the grant to the budget of the Integrated Infrastructure Initiative HYDRALAB-IV, Contract no. 261520 . The authors thank the members of the PISCES project for assistance during field work. Discussions with Jussi Evertsen (NTNU) and comments from two anonymous reviewers helped to improve the manuscript.
PY - 2014/2
Y1 - 2014/2
N2 - Aquatic vegetation interacts with the flow by posing an obstruction and in return experiences drag and is reconfigured by acting forces. It is suggested that plant buoyancy and stiffness affect these bio-physical interactions and hence should be considered when including vegetation in physical and numerical hydrodynamic models. However, data on these parameters is either lacking for many species or existing information is insufficient to model flexible aquatic vegetation correctly. Previous studies have focused on plant stems, but did not take plant foliage into account. The present study extends the existing knowledge base by providing data for four northern European brown macroalgae and also provides a comparison between the mechanical properties of stem and blade tissue for these species. Specimens of Alaria esculenta, Laminaria digitata, Fucus serratus and Fucus vesiculosus were collected from a small tidal inlet in Norway. Other than F. serratus, the macroalgae were positively buoyant and all stems showed bending moduli in agreement with previous studies with respect to their order of magnitude. Only L. digitata exhibited a significant difference between bending moduli for stems and blades and also between the tip and the base of the blades. However, there were differences in flexural rigidities (product of bending modulus and second moment of cross-sectional area) of both stems and blades and the tip and the base of blades of all but F. serratus. This highlights the important influence of cross-sectional area and cross-sectional shape on stiffness.
AB - Aquatic vegetation interacts with the flow by posing an obstruction and in return experiences drag and is reconfigured by acting forces. It is suggested that plant buoyancy and stiffness affect these bio-physical interactions and hence should be considered when including vegetation in physical and numerical hydrodynamic models. However, data on these parameters is either lacking for many species or existing information is insufficient to model flexible aquatic vegetation correctly. Previous studies have focused on plant stems, but did not take plant foliage into account. The present study extends the existing knowledge base by providing data for four northern European brown macroalgae and also provides a comparison between the mechanical properties of stem and blade tissue for these species. Specimens of Alaria esculenta, Laminaria digitata, Fucus serratus and Fucus vesiculosus were collected from a small tidal inlet in Norway. Other than F. serratus, the macroalgae were positively buoyant and all stems showed bending moduli in agreement with previous studies with respect to their order of magnitude. Only L. digitata exhibited a significant difference between bending moduli for stems and blades and also between the tip and the base of the blades. However, there were differences in flexural rigidities (product of bending modulus and second moment of cross-sectional area) of both stems and blades and the tip and the base of blades of all but F. serratus. This highlights the important influence of cross-sectional area and cross-sectional shape on stiffness.
KW - Bending modulus
KW - Brown macroalgae
KW - Buoyancy
KW - Flexural rigidity
UR - http://www.scopus.com/inward/record.url?scp=84890250786&partnerID=8YFLogxK
U2 - 10.1016/j.coastaleng.2013.11.007
DO - 10.1016/j.coastaleng.2013.11.007
M3 - Article
AN - SCOPUS:84890250786
VL - 84
SP - 73
EP - 80
JO - Coastal engineering
JF - Coastal engineering
SN - 0378-3839
ER -