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MBL March Madness: Northern Star Coral

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MBL March Madness: Northern Star Coral (Astrangia poculata)

MBL March Madness: Northern Star Coral (Astrangia poculata)Cape Cod’s only native shallow-water hard coral, Astrangia poculata is studied by MBL scientists to better understand the role of symbionts and temperature in coral skeleton formation.  MBL scientists are also interested in how these corals can withstand a wide range of temperatures when most tropical corals are stressed by only a few degrees temperature change. Because of their clear tissues, they are also used to image critical events like bleaching to elucidate the actual mechanism of the process as well as associated changes in physiology or biochemistry.

Cool facts

    • It can be found from the Caribbean all the way to its northern-most limit in Woods Hole and is New England’s only native shallow-water hard coral.
    • Astrangia poculata can survive extended “bleaching events,” which kills most other species of coral.
    • It is the only coral that can withstand temperatures below freezing.

(ID Card Photo Credit: Frank Fan, STAB high school student | Equipment: Axiocam ERc 5c; Zeiss Stemi 508)

More about Astrangia and the MBL

Microscope Allows Gentle, Continuous Imaging of Light-Sensitive Corals | MBL.edu

Cape Cod Corals | MBL SciShoots

Researchers Study Cape Cod Corals | NBC10 Boston

Coral Researcher Loretta Roberson Joins Marine Biological Laboratory | MBL.edu

  • Northern Star Coral. Credit: Mayra Sánchez García
    Northern Star Coral. Credit: Mayra Sánchez García - Zeiss Axiocam 506 color;Zeiss Axio Imager M.2 Objective Plan Apochromat 20X Reflector DIC transmitted light
  • Northern Star Coral. Credit: Loretta Roberson
    Northern Star Coral (Astrangia Poculata). Credit: Loretta Roberson | Equipment: Zeiss Axiocam503, Zeiss Axio Zoom v.16, Onjevtive PlanNeoFluar 1.0x
  • Northern Star Coral (Astrangia Poculata). Credit: Michael Shribak and Loretta Roberson. Equipment: Olympus CX21 Polychromatic Polarization microscope
  • Northern Star Coral. Credit: Mayra Sánchez García
    Northern Star Coral. Credit: Mayra Sánchez García | Equipment: Axiocam ERc5c Zeiss Stemi508
  • Northern Star Coral Credit: Frank Fan
    Northern Star Coral (Astrangia Poculata) Credit: Frank Fan, STAB High School | Equipment: Axiocam ERc 5c Zeiss Stemi 508
  • Northern Star Coral. Credit: Loretta Roberson
    Northern Star Coral. Credit: Loretta Roberson | Equipment: Olympus Tough TG 6 Underwater Camera

Select Publications

Laissue, P.P., Roberson, L., Gu, Y. et al. (2020) Long-term imaging of the photosensitive, reef-building coral Acropora muricata using light-sheet illumination. Sci Rep. doi.org/10.1038/s41598-020-67144-w

Dimond, J., Carrington, E. (2008) Symbiosis regulation in a facultatively symbiotic temperate coral: zooxanthellae division and expulsion. Coral Reefs.  doi.org/10.1007/s00338-008-0363-x

Dimond J, Carrington E (2007) Temporal variation in the symbiosis and growth of the temperate scleractinian coral Astrangia poculata. Mar Ecol Prog Ser doi.org/10.3354/meps07050

Division: Non-Bilateria

While bilaterian animals have a distinct front, back, top, and bottom, non-bilaterian organisms lack that symmetry. Non-bilaterian animals include sponges, jellyfish, corals, comb jellies, sea anemones, and placazoa (simple, free-floating multicellular marine organisms). Learn more

Meet the Other Ecdysozoan Organisms

What is MBL March Madness?

Based on the March Madness NCAA basketball tournament, during MBL March Madness, popular MBL organisms face off for your votes. YOU have the opportunity to decide what organism is crowned victorious by voting for your favorite organisms in a series of head-to-head match-ups. Voting will take place on the MBL social media channels from March 29 – April 7.

Learn more and download a bracket at mbl.edu/march-madness

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