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International Coastal Research Center · Biological Resource Regeneration Lab
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A lab that studies the ecology of abalone, sea urchins, and crabs living in the seaweed beds of Sanriku.
AboutAbout the lab
Studying the ecology of benthos in Sanriku's seaweed beds
The Biological Resource Regeneration Lab was newly established to investigate how the tsunami of the Great East Japan Earthquake affected the coastal ecosystems and biological resources of Sanriku.
Through diving surveys and rearing experiments, the lab investigates the relationships between commercially important benthos, such as abalone and sea urchins, and other organisms, as well as how they use seaweed beds.
The lab also studies the ecology and taxonomy of crabs that live in seaweed beds, such as kelp crabs.
Surveys along the Sanriku coast are based at the Otsuchi Coastal Research Center in Otsuchi, Iwate Prefecture.
Key terms
- Benthos
- Animals that live on the seafloor or on rocks, such as shellfish, sea urchins, and crabs
- Seaweed bed
- A shallow sea area where seaweed grows thickly like a forest or meadow. It serves as a habitat and spawning ground for many organisms
- Population
- A group of organisms of the same species living in the same place. Increases and decreases in its size are called population dynamics
NewsLab news
View More ↗ResearchResearch themes
Working mainly in the field along the Sanriku coast, the lab studies the ecology of benthos such as abalone, sea urchins, and crabs that live in seaweed beds. It also investigates how changes in the marine environment affect ecosystems and commercially important species.
*Illustrative imageRelationships Between Abalone, Sea Urchins, and Other Organisms
Through diving surveys and rearing experiments, the lab examines commercially important benthos such as abalone and sea urchins, looking at predator-prey relationships, competition, and how they use habitats such as seaweed beds.
*Illustrative imageMarine Environmental Change and Benthos
The Sanriku coast is influenced by multiple ocean currents, and its sea temperature is notably rising. The lab investigates how such environmental changes affect ecosystems and the populations of commercially important species.
*Illustrative imageResearch on Materials Washed Ashore
The lab studies materials washed ashore, both natural ones such as seaweed and shells and artificial ones such as plastic fishing gear. Together with local high school students, it continues to monitor the materials that wash up on the coast.
*Illustrative imageEcology of Kelp Crabs in Seaweed Beds
The lab investigates the roles that kelp crabs, such as the Oyotsuha-mogani, which are abundant in Sanriku's seaweed beds, play in the seaweed bed ecosystem, from perspectives such as habitat use, changes in diet, and mimicry.
MembersFaculty
- Associate ProfessorJun HayakawaPublications ↗
- Assistant ProfessorNaoya OhtsuchiPublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Hourai Islnd in Otsuchi” Ty19080914 / CC BY-SA 4.0 (cropped)
- Relationships Between Abalone, Sea Urchins, and Other Organisms: “Haliotis discus hannai 002” Jan Delsing / Public domain (cropped)
- Marine Environmental Change and Benthos: “Bay between Kamaishi and Ōtsuchi - 20120901” Aude / CC BY-SA 3.0 (cropped)
- Research on Materials Washed Ashore: “Marine Debris on Midway Atoll ( )” NOAA Marine Debris Program / Public domain (cropped)
- Ecology of Kelp Crabs in Seaweed Beds: “Pugettia quadridens” A. C. Tatarinov / CC BY-SA 3.0 (cropped)
- Related lab (資源解析分野(森田研究室)): “Oncorhynchus keta” Focus Saranpat Ouilapan / CC0 (cropped)
- Related lab (水産資源学研究室): “Underwater view of the sardine run as a dolphin hunts within dense schools of sardines” Stanislav Stelmakhovich / CC0 (cropped)
- Related lab (分子海洋生物学分野(分子海洋生物学グループ)
（井上 広滋研究室） ): “Colonie de modioles (Bathymodiolus azoricus) sur une cheminée hydrothermale (Ifremer )” Ifremer / CC BY 4.0 (cropped) - Related lab (資源生態分野): “Golden Cuttlefish (Sepia esculenta) ( )” Rickard Zerpe / CC BY 2.0 (cropped)
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