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Watanabe Lab
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A lab that reads past and future changes in the global environment from the skeletons of corals and shells.

AboutAbout the lab
Global environmental change recorded in coral reefs.
The Coral Reef Global Environmental Science Lab studies variability in tropical and subtropical climate and marine environments, using coral reefs as its main field site.
Its main clues are calcium carbonate produced by living organisms (biogenic carbonates), such as coral skeletons and shells.
Analyzing chemical composition along the growth bands recorded in a skeleton makes it possible to estimate the environment at the time the skeleton formed.
The lab also examines how organisms such as corals and bivalves have responded and adapted to environmental change.
Key terms
- Biogenic carbonate
- Hard parts made of calcium carbonate that are produced by living organisms, such as coral skeletons, shells, and foraminiferal tests
- Growth bands
- Bands recorded in a skeleton or shell as it grows, like tree rings. They serve as a time scale
- Paleoenvironment
- The Earth's environment in the past, such as air temperature and ocean conditions. It is reconstructed from records such as strata and fossils
ResearchResearch themes
The lab uses biogenic carbonates as proxies to reconstruct paleoenvironments, estimating changes in the global environment in the past, present, and future. It also investigates how carbonates form and how organisms respond to environmental change.
View More ↗MembersFaculty
- LecturerTsuyoshi Watanabe
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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: “Porites lobata Maldives” Julien Bidet for MDC Seamarc / CC BY-SA 4.0 (cropped)
- Reading Paleoenvironments from Coral and Shell Skeletons: “Hyakunodai, Kikai” Snap55 / CC BY 3.0 (cropped)
- Related lab (Biological and Organic Geochemistry Lab): “Misc pollen colorized” Dartmouth Electron Microscope Facility, Dartmouth College / Public domain (cropped)
- Related lab (Tomita Lab): “ISS034E016601 - Stratocumulus Clouds - Pacific Ocean” ISS Expedition 34 Crew Image Science & Analysis Laboratory, NASA Johnson Space Center Derivative work including grading, lens profile correction and noise removal.: Julian Herzog / Public domain (cropped)
- Related lab (Environmental Change Analysis Lab): “View of geological strata in Capadocia” Wokege / CC0 (cropped)
- Related lab (Atmospheric and Oceanic Physics Lab (Genta Mizuta)): “Global Sea Surface Currents and Temperature (hd video) ( )” NASA Goddard Space Flight Center from Greenbelt, MD, USA / Public domain (cropped)
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