Artificial Adhesive Substrate Restores Seaweed Habitats in Korea

KNPS
Published: 29 June 2021
Last edited: 29 June 2021
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Summary

Using biopolymer made of castor extract mixed with sand to produce an adhesive substrate, seaweed habitats have been successfully restored on the shores of Dadohaehaesang National Park in the Republic of Korea (RoK).

 

Coastal ecosystems in RoK have been experiencing many changes, including the decline of seaweed communities. To help address these concerns, the Korea National Park Service (KNPS) launched a pilot project in Namdong-ri, Jindo-gun in 2017.

 

The project sought to create nurturing habitats in which seaweed could become naturally established. To do this, it used a biopolymer made of castor extract, and mixed this with sand to produce an adhesive substrate. This was then placed on areas of bare rock in the inter-tidal zone. The existing seaweed habitats within the intertidal area were maintained as they were; the adhesive substrate was used only in empty spaces where seaweed had not colonised.

Classifications

Region
East Asia
Scale of implementation
National
Ecosystem
Marine and coastal ecosystems
Rocky reef / Rocky shore
Theme
Coastal and marine spatial management
Connectivity / transboundary conservation
Fisheries and aquaculture
Habitat fragmentation and degradation
Islands
Local actors
Mitigation
Outreach & communications
Restoration
Science and research
Species management
Challenges
Loss of Biodiversity
Ocean warming and acidification
Sea level rise
Storm surges
Tsunami/tidal wave
Erosion
Ecosystem loss
Pollution (incl. eutrophication and litter)
Sustainable development goals
SDG 13 – Climate action
Aichi targets
Target 2: Biodiversity values integrated
Target 6: Sustainable management of aquatic living resources
Target 7: Sustainable agriculture, aquaculture and forestry
Target 10: Ecosystems vulnerable to climate change
Target 11: Protected and conserved areas
Target 15: Ecosystem restoration and resilience
Target 17: Biodiversity strategies and action plans

Location

Dadohaehaesang National Park
Show on Protected Planet

Impacts

A follow-up investigation of the pilot sites showed that 13 species of seaweed, such as Ulva pertusa and Sargassum fusiforme, had become successfully established. The study also showed that the artificial substrate supported a higher biomass than the natural bedrock.

 

The substrate is characterised by its rough surface, which makes it easier for seaweed to attach to it than to natural bedrock. It also has good resistance to waves. Overall, the findings of the pilot project suggested that the substrate acts as a biofilm, enabling seaweed to adhere more easily to the surface of rocks and reducing the time needed for restoration.

 

Based on the results of the pilot project, KNPS has now expanded its efforts and used adhesive substrates on some 4,000 square metres in 85 different seaweed habitats, in cooperation with local residents on the coast of Dadohaehaesang National Park.

Contributed by

Korea National Park Service - KNPS Korea National Park Service