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Sea urchin repelling Tannin- Fe-III complex coating for ocean macroalgal afforestation

Title
Sea urchin repelling Tannin- Fe-III complex coating for ocean macroalgal afforestation
Authors
KIM, SINYANGJung, Sang MokJung, sungjuneShin, Hyun WoungHwang, Dong Soo
Date Issued
Jan-2021
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Abstract
Intense seaweed grazing by sea urchins has destroyed kelp forests and accelerated the transformation of these forests into barren areas known as urchin barrens. Once the sea urchins occupy the barren ground, it becomes more challenging to restore the kelp forests. Although phlorotannin, a primary herbivore defense chemical secreted by kelp, has been reported to discourage feeding activities of marine herbivores but the direct application of naturally extracted phlorotannin does not effectively repel sea urchins. In this study, we applied a simple and green Tannin-Fe-III (TA-Fe-III) coating on substrates as a sea urchin repellent using a cheap, ecofriendly tannin (TA) obtained from biomass as an alternative to phlorotannin. In a model aquarium experiment, most of the sea urchins (Anthocidaris crassispina) in the tank evaded the TA-Fe-III-coated substrates. In field tests with 300 sea urchins, the majority of sea urchins could not crawl over the TA-Fe-III-coated rope for more than 2 h in contrast to the control group. Hence, the safety, cost-effectiveness, and scalability of the TA-Fe-III coating make it a practical candidate to protect the kelp ecosystem from sea urchins. (C) 2020 Elsevier Ltd. All rights reserved.
URI
http://oasis.postech.ac.kr/handle/2014.oak/104869
ISSN
0045-6535
Article Type
Article
Citation
CHEMOSPHERE, vol. 263, 2021-01
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정성준JUNG, SUNGJUNE
Dept. of Creative IT Engin.
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