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Distribution of Harmful Algal Growth-Limiting Bacteria on Artificially Introduced Ulva and Natural Macroalgal Beds

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Title: Distribution of Harmful Algal Growth-Limiting Bacteria on Artificially Introduced Ulva and Natural Macroalgal Beds
Authors: Inaba, Nobuharu Browse this author
Kodama, Isamu Browse this author
Nagai, Satoshi Browse this author
Shiraishi, Tomotaka Browse this author
Matsuno, Kohei Browse this author →KAKEN DB
Yamaguchi, Atsushi Browse this author →KAKEN DB
Imai, Ichiro Browse this author →KAKEN DB
Keywords: harmful algal bloom
mitigation
macroalgal bed
growth-limiting bacteria
Issue Date: Aug-2020
Publisher: MDPI
Journal Title: Applied sciences
Volume: 10
Issue: 16
Start Page: 5658
Publisher DOI: 10.3390/app10165658
Abstract: The intensity and frequency of harmful algal blooms (HABs) have increased, posing a threat to human seafood resources due to massive kills of cultured fish and toxin contamination of bivalves. In recent years, bacteria that inhibit the growth of HAB species were found to be densely populated on the biofilms of some macroalgal species, indicating the possible biological control of HABs by the artificial introduction of macroalgal beds. In this study, an artificially created Ulva pertusa bed using mobile floating cages and a natural macroalgal bed were studied to elucidate the distribution of algal growth-limiting bacteria (GLB). The density of GLB affecting fish-killing raphidophyteChattonella antiqua, and two harmful dinoflagellates, were detected between 10^6 and 10^7 CFU g^-1 wet weight on the biofilm of artificially introduced U. pertusa and 10 to 10^2 CFU mL^-1 from adjacent seawater; however, GLB found from natural macroalgal species targeted all tested HAB species (five species), ranging between 10^5 and 10^6 CFU g^-1 wet weight in density. These findings provide new ecological insights of GLB at macroalgal beds, and concurrently demonstrate the possible biological control of HABs by artificially introduced Ulva beds.
Rights: © 2020 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution License.
http://creativecommons.org/licenses/by/4.0/
Type: article
URI: http://hdl.handle.net/2115/79430
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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