2011 Fiscal Year Final Research Report
Facilitation of the maintenance of kelp beds in rocky subtidal areas due to wave disturbance and microalgae
| Project/Area Number |
21570030
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Ecology/Environment
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| Research Institution | Fisheries Research Agency |
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Principal Investigator |
KAWAMATA Shigeru 独立行政法人水産総合研究センター, 水産工学研究所, 主幹研究員 (50372066)
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| Co-Investigator(Kenkyū-buntansha) |
MURAOKA Daisuke 独立行政法人水産総合研究センター, 東北区水産研究所, 主任研究員 (30371800)
ADACHI Kumiko 独立行政法人水産総合研究センター, 経営企画部, 評価コーディネーター (60414158)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 撹乱 / 生物多様性 / ファシリテーション |
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| Research Abstract |
Kelp beds can be maintained locally in sea urchin-dominated barrens due to the restriction on urchin feeding by wave action which increases with decreasing depth. Long-term velocity determination revealed that the probability for the wave-induced orbital velocity near the lower edge of persistent kelp beds lower than the upper limit for urchin feeding was not zero but approximately 20%. A laboratory flow tank experiment and field study showed that the cover of microalgae or crustose algae in and around kelp beds reduced urchins attachment strength and thus the upper velocity limit for their invasion, facilitating the maintenance of the beds.
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