2010 Fiscal Year Final Research Report
Physiological ecology on formation and maintenance of marine forest
| Project/Area Number |
20380106
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General fisheries
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| Research Institution | Tohoku University |
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Principal Investigator |
TANIGUCHI Kazuya Tohoku University, 大学院・農学研究科, 名誉教授 (40282082)
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| Co-Investigator(Kenkyū-buntansha) |
AGATSUMA Yukio 東北大学, 大学院・農学研究科, 教授 (50292256)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 海藻 |
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| Research Abstract |
Recent warm and nutrient-stressed oceanographic condition resulted in widespread losses of marine forest in many part of the world. The significance of nutrient availability on formation and maintenance of marine forest was investigated by some culture studies and a field experiment. In the culture studies, the combined effect of high water temperature and low nutrient concentration on growth and survival in fucoid algae Sargassum yesoense and S. confusum was examined. These species in low nutrient concentration grew in 5-30℃, but could not survive in 35℃. We previously reported that the young sporophyte of the kelp Ecklonia cava withered within 12 days in 30℃ and low nutrient concentration. These results suggest that the fucoids have high-temperature and nutient-stressed tolerance compared with the kelp. In the field experiment, liquid fertilizer was continuously provided into a crustose collarine bed in western coast of Hokkaido, nothern Japan, and the growth of the kelp Saccharina japonica transplanted in November was compared with that transplanted to another site without fertilizing. The kelp with fertilizing grew until January, but the kelp without fertilizing disappeared. These results suggest that the nutrient availability has a significant role for the formation of marine forest. Further studies of the nutrient requirement of kelp and fucoids are necessary to develop the marine afforestation technique by fertilizing.
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[Presentation] Growth and gonad development of the sea urchin Hemicentrotus pulcherrimus in an Eisenia kelp bed in the Oshika Peninsula, northern Japan.2010
Author(s)
Agatsuma Y., Toda N., Ogasawara M., Kinoshita J., Watanabe M., Matsui T., Inomata E.
Organizer
7th European Conference on Echinoderms.
Place of Presentation
Geoscience Center, University of Gottingen, Gottingen, Germany.
Year and Date
2010-10-06
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[Presentation] 磯焼け域におけるウニ駆除と栄養塩添加によるホソメコンブ群落の造成2009
Author(s)
吾妻行雄, 鹿又郁美, 池森力, 吉田茂樹, 武内良雄, 藤島浩晃, 中島和彦, 佐野満廣, 金崎伸幸, 今井久益, 山元直樹, 金濱博樹, 松原高司, 高橋智, 磯貝辰彦, 谷口和也
Organizer
2009年度日本水産学会秋季大会
Place of Presentation
いわて県民情報交流センター・アイーナ(盛岡市)
Year and Date
2009-10-01
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[Presentation] 養殖ワカメの密度効果2008
Author(s)
鹿又郁美、山名淳、伊勢修夫、吾妻行雄、谷口和也
Organizer
第5回東北大学バイオサイエンスシンポジウム
Place of Presentation
仙台国際センター
Year and Date
2008-05-19
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