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Growth and biofouling in kelp aquaculture (Saccharina latissima): the effect of location and wave exposure

Citation

Visch, W and Nylund, GM and Pavia, H, Growth and biofouling in kelp aquaculture (Saccharina latissima): the effect of location and wave exposure, Journal of Applied Phycology, 32 pp. 3199-3209. ISSN 0921-8971 (2020) [Refereed Article]


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DOI: doi:10.1007/s10811-020-02201-5

Abstract

Seaweed aquaculture is receiving increasing attention for food and non-food applications in Europe, where it is still an emerging industry. The cultivation of seaweeds in the sea is attractive as it does not compete with agricultural crops for land and freshwater, whilst generating high yearly biomass yield. The selection of suitable cultivation sites in coastal waters is essential for the sustainable establishment and further development of seaweed aquaculture in Europe. Here, we investigate the effects of wave exposure and geographic location on growth and biofouling of kelp (Saccharina latissima), using a transplantation experiment along the Swedish west coast. Biofouling of kelp decreased with increased wave exposure, from 10 and 6% coverage at sheltered and moderately exposed locations, respectively, to 3% at exposed locations. Growth, measured as blade surface area, generally increased with decreased wave exposure, with approximately 40% less growth at exposed locations compared to sheltered or moderately exposed location. We identified that there is large spatial variation in growth and fouling of the seaweed biomass at the selected farm sites, with significant differences from the km-scale to the m-scale. In addition, exposure level affected the tissue composition, with a high carbon, but low nitrogen and water content at exposed locations compared to moderate and sheltered sites. Isotope signatures (i.e. δ13C and δ15N) also differed between exposure levels. Together, these results indicate that wave exposure is an important factor to consider in site selection for both yield as well as quality of the seaweed biomass for future kelp farms.

Item Details

Item Type:Refereed Article
Keywords:aquaculture, biofouling, biomass yield, Phaeophyta, Saccharina latissima, seaweed farming, wave exposure
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Aquaculture
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the agricultural, food and veterinary sciences
UTAS Author:Visch, W (Dr Wouter Visch)
ID Code:151872
Year Published:2020
Web of Science® Times Cited:19
Deposited By:Ecology and Biodiversity
Deposited On:2022-08-05
Last Modified:2022-08-08
Downloads:0

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