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Yoshimura Lab (Marine Environmental Science Division)
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A lab that uses chemical analysis to uncover how bioelements cycle through oceans and lakes.
AboutAbout the lab
Uncovering the unknown ocean through chemical analysis.
The Yoshimura Lab uses precise chemical analysis to study how bioelements such as carbon and nitrogen cycle in the ocean.
The ocean absorbs large amounts of carbon dioxide and heat, playing a major role in stabilizing Earth's climate.
The dynamics of ecosystems, including plankton, that support this function are determined by bioelements.
The lab is located in the Graduate School of Environmental Science on the Sapporo Campus, and conducts surveys at waterside sites such as Lake Saroma and Akkeshi.
Key terms
- Bioelements
- Elements such as carbon, nitrogen, phosphorus, silicon, and iron that make up the bodies of living things and are essential to life processes
- Nutrients
- Substances containing nitrogen, phosphorus, and other elements that phytoplankton and seaweed need in order to grow. They are also carried from land through rivers
- Brackish lake
- A lake connected to the sea in which seawater and freshwater from rivers mix
ResearchResearch themes
Ecosystems made up of bacteria, plankton, and other organisms play a major role in the ocean's uptake of carbon dioxide, and their activity is governed by bioelements such as carbon, nitrogen, phosphorus, silicon, and iron. Through precise chemical analysis, the lab works to elucidate the processes by which bioelements cycle.
*Illustrative imageScallop Aquaculture and the Environment in Lake Saroma
To estimate how many scallops can be farmed in Lake Saroma, the lab monitors the lake's environment.
*Illustrative imageCarbon Cycling in a Brackish Lake
To clarify how carbon cycles in Obuchi-numa, a brackish lake in Aomori Prefecture, the lab investigates it with particular attention to the exchange of carbon dioxide between the atmosphere and the water.
*Illustrative imageNutrients Carried from Land to Sea
In the Akkeshi area of Hokkaido, the lab studies how nutrients carried from land through rivers to inner bays and coastal waters are transported.
*Illustrative imageCoal Ash Blocks and Water Quality
To use coal ash from thermal power plants as reefs for growing seaweed, the lab examines how blocks made of coal ash affect water quality.
MembersFaculty
The Yoshimura Lab consists of faculty members and PhD, master's, and undergraduate students.As of 2023
- Associate ProfessorTakeshi Yoshimura
VoicesStudent voices
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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: “Campagne GHASS2 - La CTD à bord du Pourquoi pas ? (Ifremer )” Stephane Lesbats / CC BY 4.0 (cropped)
- Scallop Aquaculture and the Environment in Lake Saroma: “Lake Saroma West View” Hokko-sha / CC0 (cropped)
- Carbon Cycling in a Brackish Lake: “Takahoko Swamp 1” Sapphire~jawiki / CC BY-SA 3.0 (cropped)
- Nutrients Carried from Land to Sea: “Akkeshi Bay” Highten31 / CC BY-SA 3.0 (cropped)
- Coal Ash Blocks and Water Quality: “Fly ash of a thermal power plant containing hollow cenospheres” Dr Anatoly / CC BY 4.0 (cropped)
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