Artificial Adhesive Substrate Restores Seaweed Habitats in Korea

KNPS
Publié: 29 juin 2021
Dernière modification: 29 juin 2021
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Résumé

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

Région
Asie de l'Est
Échelle de la mise en œuvre
National
Ecosystème
Récif rocailleux / Rive rocailleux
Écosystèmes marins et côtiers
Thème
Acteurs locaux
Atténuation du changement climatique
Connectivité / conservation transfrontières
Fragmentation et la dégradtion de l'habitat
Gestion des espaces côtiers et marins
Gestion des espèces
Pêche et aquaculture
Restauration
Science et recherche
Sensibilisation et communications
Îles
Défis
Perte de biodiversité
Acidification des océans
Montée du niveau des mers
Ondes de tempêtes
Tsunami/Raz-de-marée
Érosion
Perte de l'écosystème
Pollution (y compris eutrophisation et déchets)
Objectifs de Développement Durable
ODD 13 - Mesures relatives à la lutte contre les changements climatiques
Obectifs d'Aichi
Objectif 2: Valeurs de la biodiversité intégrées
Objectif 6: Gestion durable des ressources vivantes aquatiques
Objectif 7: Agriculture, aquaculture et sylviculture durable
Objectif 10: Ecosystèmes vulnérables au changement climatique
Objectif 11: Aires protégées et conservées
Objectif 15: Restauration et la résilience des écosystèmes
Objectif 17: Stratégies de la biodiversité et des plans d'action

Emplacement

Dadohaehaesang National Park
Afficher sur Planète protégée

Les impacts positifs

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.

Contribué par

Korea National Park Service - KNPS Korea National Park Service