High spatial and temporal variation in biomass composition of the novel aquaculture target Ecklonia radiata .

Autor: Nepper-Davidsen J; Coastal Marine Field Station, School of Science, University of Waikato, Tauranga, New Zealand.; Environmental Research Institute, The University of Waikato, Tauranga, New Zealand., Glasson CRK; Coastal Marine Field Station, School of Science, University of Waikato, Tauranga, New Zealand.; Environmental Research Institute, The University of Waikato, Tauranga, New Zealand., Lawton RJ; Coastal Marine Field Station, School of Science, University of Waikato, Tauranga, New Zealand.; Environmental Research Institute, The University of Waikato, Tauranga, New Zealand., Magnusson M; Coastal Marine Field Station, School of Science, University of Waikato, Tauranga, New Zealand.; Environmental Research Institute, The University of Waikato, Tauranga, New Zealand.
Jazyk: angličtina
Zdroj: Journal of applied phycology [J Appl Phycol] 2023 Apr 28, pp. 1-14. Date of Electronic Publication: 2023 Apr 28.
DOI: 10.1007/s10811-023-02969-2
Abstrakt: The biomass composition of kelp varies within species both spatially and temporally. However, this variation in biomass quality has not yet been investigated for the native kelp Ecklonia radiata within New Zealand, where the kelp is a target for the emerging seaweed aquaculture industry. In this study we quantified spatial and temporal variation in the composition of E. radiata biomass, collected from 12 sites around the North Island of New Zealand and from 12 months across a full year at a single site ( n  = 138). High spatial variation was detected for most components, including alginate (range: 16.6 - 22.7% DW, n  = 12), fucoidan (range: 1.2 - 1.6% DW, n  = 12), phlorotannins (range: 4.8 - 9.3% DW, n  = 72), and glucose (range: 9.3 - 22.6% DW, n  = 12). The biomass composition of E. radiata varied significantly among sites but with no clear patterns among regions, indicating that geographic differences were mostly local rather than regional, possibly due to site-specific environmental conditions. Significant temporal variation (measured by positive autocorrelation between months) was detected in the content of lipids, proteins, glucose, guluronic acid, nitrogen, phosphorous, iodine, arsenic, and mercury, and for the mannuronic to guluronic acid (M:G) ratio. Overall, E. radiata had comparable biomass composition to that of commercially grown northern hemisphere species but with substantially higher phlorotannin content. These results demonstrate that E. radiata could be a viable southern hemisphere alternative for a broad range of commercial applications.
Supplementary Information: The online version contains supplementary material available at 10.1007/s10811-023-02969-2.
Competing Interests: Competing interestsThe authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
(© The Author(s) 2023.)
Databáze: MEDLINE
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