Project 3616: A. Ziegler, A. M. Gilligan, J. G. Dillon, B. Pernet. 2020. Schizasterid heart urchins host microorganisms in a digestive symbiosis of Mesozoic origin. Frontiers in Microbiology. 11:1697.
Specimen: Brisaster townsendi (unvouchered)
View: Aboral

Abstract

Because of their lifestyles, abundance, and feeding habits, infaunal marine deposit feeders have a significant impact on the ocean floor. As these animals also ingest microorganisms associated with their sediment and seawater diet, their digestive tract usually contains a diverse array of bacteria. However, while most of these microorganisms are transients, some may become part of a resident gut microbiome, in particular when sheltered from the main flow of digesta in specialized gut compartments. Here, we provide an in-depth analysis of the structure and contents of the intestinal caecum (IC), a hindgut diverticulum found exclusively in schizasterid heart urchins (Echinoidea: Spatangoida: Schizasteridae). Based on specimens of Brisaster townsendi, in addition to various other schizasterid taxa, our structural characterization of the IC shows that the organ is a highly specialized gut compartment with unique structural properties. Next generation sequencing shows that the IC contains a microbial population composed predominantly of Bacteroidales, Desulfobacterales, and Spirochaetales. The microbiome of this gut compartment is significantly different in composition and lower in diversity than the microbial population in the sedimentfilled main digestive tract. Inferences on the function and evolution of the IC and its microbiome suggest that this symbiosis plays a distinct role in host nutrition and that it evolved at least 66 million years ago during the final phase of the Mesozoic.


Read the article »

Article DOI: 10.3389/fmicb.2020.01697

Project DOI: 10.7934/P3616, http://dx.doi.org/10.7934/P3616
This project contains
  • 45 Media
  • 17 Taxa
  • 50 Specimens
Total size of project's media files: 294.94M

Download Project SDD File
Currently Viewing:
MorphoBank Project 3616
  • Creation Date:
    16 January 2020
  • Publication Date:
    21 July 2020
  • Project views: 625

    This research
    supported by

    Authors' Institutions

    • California State University Long Beach

    • Rheinische Friedrich-Wilhelms-Universit├Ąt Bonn (University of Bonn)



    Members

    member name taxa specimens media media
    notes
    Alexander Ziegler
    Project Administrator
    Last logged in 07/21/20
    17504545
    Jesse G. Dillon
    Full membership
    Last logged in Never
    0000
    Ariel M. Gilligan
    Full membership
    Last logged in Never
    0000
    Bruno Pernet
    Full membership
    Last logged in Never
    0000


    Project has no matrices defined.



    Project views

    type number of views Individual items viewed (where applicable)
    Total project views625
    Project overview41
    Media views332Media search (48 views); M683414 (7 views); M683415 (6 views); M683416 (6 views); M683417 (7 views); M683418 (6 views); M683419 (6 views); M683420 (6 views); M683421 (8 views); M683422 (7 views); M683423 (6 views); M683424 (6 views); M683425 (6 views); M683426 (8 views); M683427 (7 views); M683428 (7 views); M683429 (7 views); M683430 (6 views); M683431 (8 views); M683432 (7 views); M683433 (6 views); M683434 (5 views); M683435 (5 views); M683436 (6 views); M683437 (5 views); M683438 (6 views); M683439 (6 views); M683440 (6 views); M683441 (6 views); M683442 (5 views); M683443 (6 views); M683444 (5 views); M683445 (5 views); M683446 (7 views); M683447 (8 views); M683448 (6 views); M683449 (6 views); M683450 (6 views); M683451 (9 views); M683452 (8 views); M683453 (6 views); M683454 (6 views); M683455 (6 views); M683456 (5 views); M683457 (6 views); M683458 (6 views);
    Bibliography10
    Views for media list18
    Specimen list197
    Taxon list27




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project3
    Project downloads3