A new approach to the restoration of seaweed beds using Sargassum fulvellum
- PDF / 1,291,365 Bytes
- 7 Pages / 595.276 x 790.866 pts Page_size
- 105 Downloads / 172 Views
23RD INTERNATIONAL SEAWEED SYMPOSIUM, JEJU
A new approach to the restoration of seaweed beds using Sargassum fulvellum Sang Mok Jung 1 & Ji Hyun Lee 2 & Seung Hee Han 1 & Won Bin Jeon 1 & Ga Yeon Kim 1 & Sinyang Kim 3 & Seongju Kim 8 & Hwa-Rim Lee 4 & Dong Soo Hwang 3,5,6 & Sungjune Jung 3,4,5 & Jongdae Lee 7 & Hyun Woung Shin 1 Received: 7 August 2019 / Revised and accepted: 23 January 2020 / Published online: 8 September 2020 # Springer Nature B.V. 2020
Abstract Seaweed beds are productive marine ecosystems; they provide habitat and serve as spawning, breeding, and feeding sites for fish and shellfish. Seaweed beds are declining with environmental change and pollution. In affected areas, including “urchin barrens” and those affected by “whitening events,” coralline algae appear, preventing the attachment of seaweed spores to the substrate. Many methods have been used to restore seaweed beds, such as those employing artificial reefs, seaweed ropes, spore bags, and transplanted cultures. However, such efforts are insufficient to overcome the disappearance of seaweed beds from coastal areas. This study examined the use of a new technique that involves encapsulating seaweed zygotes with polysaccharide-like alginates to improve their attachment using the brown alga Sargassum fulvellum, which plays an important role in seaweed forests. We tested the efficacy of encapsulated zygotes using polyvinyl chloride (PVC) panels and concrete bricks in the sea. In the laboratory, the germination percentage of encapsulated Sargassum zygotes was 70% ± 1.6%, similar to the rate of unencapsulated zygotes. In the field experiment, PVC panels and concrete bricks were coated with encapsulated and unencapsulated zygotes; the germination density and growth rates of encapsulated zygotes were 4 (p < 0.001) and 7 times (p < 0.016) greater, respectively, than those of unencapsulated zygotes. The germination density and growth rate of encapsulated zygotes on concrete bricks were also greater. Therefore, encapsulation should increase the attachment of seaweed spores in marine environments. Keywords Encapsulated zygote . Sargassum fulvellum . Phaeophyceae . Urchin barren . Macroalgae . Artificial reef
* Hyun Woung Shin [email protected] 1
Department of Life Science and Biotechnology, Soonchunhyang University, Asan, Chungcheongnam-do 336-745, South Korea
2
Korea Fisheries Resources Agency East Sea Branch, 457, Samho-ro, Buk-gu, Pohang, Gyungsangbuk-do, South Korea
3
Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang 37673, South Korea
4
Department of Creative IT Engineering, Pohang University of Science and Technology, Pohang 37673, South Korea
5
School of Interdisciplinary bioscience and bioengineering, Pohang University of Science and Technology, Pohang 37673, South Korea
6
School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang 37673, South Korea
7
Department of Environmental Health Science, Soonchunhyang University, Asan, Ch
Data Loading...
