Reproduction, hatchery and culture applications for the giant kelp (<i>Macrocystis pyrifera</i>): a methodological appraisal

Le, Duong M.; Desmond, Matthew J.; Pritchard, Daniel W.; Camus, Carolina; Hurd, Catriona L.; Hepburn, Christopher D.

doi:10.1080/26388081.2022.2086823

Cited by 6 publications

(3 citation statements)

References 121 publications

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“…The NBA among the three studied sites was quite different, with the more wave exposed site (Coal Point) being the most productive per individual blade and area. Increased water motion affects the availability of inorganic carbon and nutrients by replenishing them at the kelp blade surface (Hepburn et al., 2012) and results in a thinner diffusion boundary layer on the blade surface, facilitating nutrient uptake (Hurd, 2000, 2017; Hurd, Lobban, et al., 2014; Le et al., 2022; Stephens & Hepburn, 2016). For example, Laminaria digitata was shown to grow better in high water flow compared to slow flow under low nutrient conditions (Kregting et al., 2016).…”

Section: Discussionmentioning

confidence: 99%

Primary production of the kelp Lessonia corrugata varies with season and water motion: Implications for coastal carbon cycling

Nardelli,

Visch,

Farrington

et al. 2023

Journal of Phycology

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Kelp forests provide vital ecosystem services such as carbon storage and cycling, and understanding primary production dynamics regarding seasonal and spatial variations is essential. We conducted surveys at three sites in southeast Tasmania, Australia, that had different levels of water motion, across four seasons to determine seasonal primary production and carbon storage as living biomass for kelp beds of Lessonia corrugata (Order Laminariales). We quantified blade growth, erosion rates, and the variation in population density and estimated both the net biomass accumulation (NBA) per square meter and the carbon standing stock. We observed a significant difference in blade growth and erosion rates between seasons and sites. Spring had the highest growth rate (0.02 g C · blade−1 · d−1) and NBA (1.62 g C · m−2 · d−1), while summer had the highest blade erosion (0.01 g C · blade−1 · d−1), with a negative NBA (−1.18 g C · m−2 · d−1). Sites exhibiting lower blade erosion rates demonstrated notably greater NBA than sites with elevated erosion rates. The sites with the highest water motion had the slowest erosion rates. Moreover, the most wave‐exposed site had the densest populations, resulting in the highest NBA and a greater standing stock. Our results reveal a strong seasonal and water motion influence on carbon dynamics in L. corrugata populations. This knowledge is important for understanding the dynamics of the carbon cycle in coastal regions.

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Section: Discussionmentioning

confidence: 99%

Primary production of the kelp Lessonia corrugata varies with season and water motion: Implications for coastal carbon cycling

Nardelli,

Visch,

Farrington

et al. 2023

Journal of Phycology

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“…Macrocystis pyrifera (order Laminariales; giant kelp) is a large habitat-forming seaweed found in Australia, New Zealand, South Africa, California and Chile (Graham et al, 2007;Bolton et al, 2012;Schiel and Foster, 2015;Duong et al, 2022). It is an important habitat provider throughout its range and is a significant contributor to nitrogen cycling and primary production (Arnold and Manley, 1985;Hay, 1990;Krumhansl et al, 2016;Tait et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Effect of photoperiod and temperature on bioproduct production from juvenile sporophytes of Macrocystis pyrifera

Purcell,

Wheeler,

Hayes

et al. 2024

Front. Mar. Sci.

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The giant kelp (Macrocystis pyrifera (Linnaeus) C. Agardh 1820) is a habitat-forming brown seaweed in temperate systems with an unexplored potential as a source of seaweed bioproducts. This study used M. pyrifera sporophytes sourced in Tasmania, Australia, to investigate the effect of photoperiod and temperature on growth rates and the nutritional characteristics of the resulting juvenile biomass. Four cultivation treatments combined growth temperatures of 12 °C, 15 °C, 18 °C with light:dark (L:D) of 12:12 and 16:8 (L:D) photoperiods, (12 °C – (12:12); 12 °C – (16:8); 15 °C – (12:12); 18 °C – (12:12) to investigate their effect on the number and size of sporophytes, biomass accumulation and nutritional composition. After 60 days of cultivation the 12 °C – (12:12) treatment had the greatest number of juvenile sporophytes, and the greatest biomass of 14 ± 1.3 g dry weight (DW). The lowest biomass of 1 g DW, was obtained from the 18 °C – (12:12) treatment. The protein content across all treatments ranged from 16-22.48% DW, with the 12 °C (12:12) treatment having largest range, then the 12°C (16:18) treatment was next with 18.48-22.48% DW, and the 15°C (12:12) treatment had the lowest protein range with 16.48-18% DW. These results are in the range of protein content previously reported for brown seaweeds of 5-20%. Total polysaccharide content ranged from 9.6-16.2% DW with the highest content of 16.2% DW obtained for the 15 °C – (12:12) treatment, and the lowest total polysaccharide content of 9.6% DW obtained for the 12 °C (16:18) treatment. After 66 days of cultivation, the highest yield of sulphated polysaccharides of 0.4% DW was obtained for the 12 °C (12:12) treatment. Total fatty acids were analysed, with the highest polyunsaturated fatty acid content of 60.4% detected in the 12 °C (12:12) treatment. This study demonstrates that temperature and photoperiod are factors impacting juvenile sporophyte growth, biomass accumulation and biochemical composition. The study showed the least stressed sporophytes produced the most potentially beneficial nutritional or bioactive profile.

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Section: Introductionmentioning

confidence: 99%

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Reproduction, hatchery and culture applications for the giant kelp (Macrocystis pyrifera): a methodological appraisal

Cited by 6 publications

References 121 publications

Primary production of the kelp Lessonia corrugata varies with season and water motion: Implications for coastal carbon cycling

Primary production of the kelp Lessonia corrugata varies with season and water motion: Implications for coastal carbon cycling

Effect of photoperiod and temperature on bioproduct production from juvenile sporophytes of Macrocystis pyrifera

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