Seeding of fragments of the agarophyte Gelidium lingulatum (Rhodophyta, Gelidiales) for the repopulation of lower levels of wave-exposed, intertidal rocky shores

This work aimed to improve the techniques for cultivating the species Gelidium oridanum, testing different sources of calcium. Tetraspores and explants were grown in the laboratory for 20 days with seawater enriched with 50% von Stosch solution and oyster or mussel shell powder (252 mg L − 1 and 336 mg L − 1 ), or calcium chloride (147 mg L − 1 and 295 mg L − 1 ). Tetraspores or explants cultivated with no calcium salts or shell powder were used as control. Tetraspores germination rate and morphology, and germlings morphology, average length, and growth rate were evaluated. Besides, the morphology, upright axes formation, and growth rate of explants were also evaluated. There was no difference in tetraspore germination among treatments and control. Treatments with shell powder impaired the tetraspores' viability, indicated by a greenish color, cellular disorganization, and delay in germ tube development. Germlings cultivated with CaCl 2 show better initial development but with no improvement to control.Concerning explants, those cultivated with mussel shell powder showed the highest growth rate (3.92 and 4.28% day − 1 , according to concentration) in relation to other treatments. In particular, those cultivated in 252 mg L − 1 showed a signi cant formation of upright axes (10.15 ± 0.85 upright axes) compared to the control (5.18 ± 0.42 upright axes). Based on the results, we recommend using mussel shell powder at a concentration of 252 mg L − 1 to optimize explant cultivation.

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Shell powder as source of calcium in the development of Gelidium floridanum (Rhodophyta, Gelidiales) tetraspores and explants

Bruzinga

Simioni

Hayashi

2022

J Appl Phycol

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A concise review of the potential utilization based on bioactivity and pharmacological properties of the genus Gelidium (Gelidiales, Rhodophyta)

et al. 2023

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Seaweed restocking along the Chilean coast: History, present, and inspiring recommendations for sustainability

et al. 2023

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Several seaweed species are commercialized worldwide both due to high demand for food and feed and as a raw material for the extraction of phycocolloids such as agar, carrageenan, and alginates that are used broadly in the food, cosmetic, and pharmaceutical industries. Chile is the world’s leading marine seaweed biomass producer when it comes to the exploitation of natural kelp beds. This extraction pressure has persisted for decades and has resulted in a reduction in natural stocks along the benthic ecosystems of the Chilean coast. Over the last three decades, several strategies aimed at restoring seaweed stocks have been implemented (i.e., sexual and asexual reproduction, the use of spore-type propagules or fragments of thalli, and entire thallus transplants). Success rates have varied, but the biological feasibility of such strategies has been demonstrated for several species. However, technological improvements must be achieved to move from small-scale, pilot experiments to cost-effective restocking strategies that are easy to transfer to fisher communities and another end-user, scalable to marine field conditions, and socio-ecologically sustainable. Researchers in other geographic areas have explored similar pathways for developing kelp restocking strategies and have tackled the research gaps regarding its massification. This work summarizes the research activities carried out in recent decades in the search for sustainable strategies to restore algal stocks in Chile.

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Seeding of fragments of the agarophyte Gelidium lingulatum (Rhodophyta, Gelidiales) for the repopulation of lower levels of wave-exposed, intertidal rocky shores

Cited by 3 publications

References 39 publications

Shell powder as source of calcium in the development of Gelidium floridanum (Rhodophyta, Gelidiales) tetraspores and explants

Shell powder as source of calcium in the development of Gelidium floridanum (Rhodophyta, Gelidiales) tetraspores and explants

A concise review of the potential utilization based on bioactivity and pharmacological properties of the genus Gelidium (Gelidiales, Rhodophyta)

Seaweed restocking along the Chilean coast: History, present, and inspiring recommendations for sustainability

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