Distribution of Harmful Algal Growth-Limiting Bacteria on Artificially Introduced <i>Ulva</i> and Natural Macroalgal Beds
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...
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MDPI AG
2020-08-01
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| author | Nobuharu Inaba Isamu Kodama Satoshi Nagai Tomotaka Shiraishi Kohei Matsuno Atsushi Yamaguchi Ichiro Imai |
| author_facet | Nobuharu Inaba Isamu Kodama Satoshi Nagai Tomotaka Shiraishi Kohei Matsuno Atsushi Yamaguchi Ichiro Imai |
| author_sort | Nobuharu Inaba |
| collection | DOAJ |
| description | 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 <i>Ulva pertusa</i> 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 raphidophyte <i>Chattonella antiqua</i>, and two harmful dinoflagellates, were detected between 10<sup>6</sup> and 10<sup>7</sup> CFU g<sup>−1</sup> wet weight on the biofilm of artificially introduced <i>U. pertusa</i> and 10 to 10<sup>2</sup> CFU mL<sup>−1</sup> from adjacent seawater; however, GLB found from natural macroalgal species targeted all tested HAB species (five species), ranging between 10<sup>5</sup> and 10<sup>6</sup> CFU g<sup>−1</sup> 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 <i>Ulva</i> beds. |
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| institution | Directory Open Access Journal |
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| last_indexed | 2024-03-10T17:24:12Z |
| publishDate | 2020-08-01 |
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| series | Applied Sciences |
| spelling | doaj.art-3705472f52c54f159a1be5a8b8b3150c2023-11-20T10:13:28ZengMDPI AGApplied Sciences2076-34172020-08-011016565810.3390/app10165658Distribution of Harmful Algal Growth-Limiting Bacteria on Artificially Introduced <i>Ulva</i> and Natural Macroalgal BedsNobuharu Inaba0Isamu Kodama1Satoshi Nagai2Tomotaka Shiraishi3Kohei Matsuno4Atsushi Yamaguchi5Ichiro Imai6Civil Engineering Research Institute for Cold Region, Public Works Research Institute, Sapporo City, Hokkaido 062-8602, JapanFaculty/Graduate School of Fisheries Sciences, Hokkaido University, Hakodate City, Hokkaido 041-8611, JapanNational Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, Yokohama City, Kanagawa 236-8648, JapanAgriculture, Forestry and Fisheries Department, Wakayama Prefecture, Wakayama City, Wakayama 640-8585, JapanFaculty/Graduate School of Fisheries Sciences, Hokkaido University, Hakodate City, Hokkaido 041-8611, JapanFaculty/Graduate School of Fisheries Sciences, Hokkaido University, Hakodate City, Hokkaido 041-8611, JapanFaculty/Graduate School of Fisheries Sciences, Hokkaido University, Hakodate City, Hokkaido 041-8611, JapanThe 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 <i>Ulva pertusa</i> 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 raphidophyte <i>Chattonella antiqua</i>, and two harmful dinoflagellates, were detected between 10<sup>6</sup> and 10<sup>7</sup> CFU g<sup>−1</sup> wet weight on the biofilm of artificially introduced <i>U. pertusa</i> and 10 to 10<sup>2</sup> CFU mL<sup>−1</sup> from adjacent seawater; however, GLB found from natural macroalgal species targeted all tested HAB species (five species), ranging between 10<sup>5</sup> and 10<sup>6</sup> CFU g<sup>−1</sup> 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 <i>Ulva</i> beds.https://www.mdpi.com/2076-3417/10/16/5658harmful algal bloommitigationmacroalgal bedgrowth-limiting bacteria |
| spellingShingle | Nobuharu Inaba Isamu Kodama Satoshi Nagai Tomotaka Shiraishi Kohei Matsuno Atsushi Yamaguchi Ichiro Imai Distribution of Harmful Algal Growth-Limiting Bacteria on Artificially Introduced <i>Ulva</i> and Natural Macroalgal Beds Applied Sciences harmful algal bloom mitigation macroalgal bed growth-limiting bacteria |
| title | Distribution of Harmful Algal Growth-Limiting Bacteria on Artificially Introduced <i>Ulva</i> and Natural Macroalgal Beds |
| title_full | Distribution of Harmful Algal Growth-Limiting Bacteria on Artificially Introduced <i>Ulva</i> and Natural Macroalgal Beds |
| title_fullStr | Distribution of Harmful Algal Growth-Limiting Bacteria on Artificially Introduced <i>Ulva</i> and Natural Macroalgal Beds |
| title_full_unstemmed | Distribution of Harmful Algal Growth-Limiting Bacteria on Artificially Introduced <i>Ulva</i> and Natural Macroalgal Beds |
| title_short | Distribution of Harmful Algal Growth-Limiting Bacteria on Artificially Introduced <i>Ulva</i> and Natural Macroalgal Beds |
| title_sort | distribution of harmful algal growth limiting bacteria on artificially introduced i ulva i and natural macroalgal beds |
| topic | harmful algal bloom mitigation macroalgal bed growth-limiting bacteria |
| url | https://www.mdpi.com/2076-3417/10/16/5658 |
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