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    Genetic diversity of giant clams (Tridacna spp.) and their associated Symbiodinium in the central Red Sea

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    MARB-D-16-00384_R1 (2).pdf
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    Type
    Article
    Authors
    Pappas, Melissa cc
    He, Song cc
    Hardenstine, Royale cc
    Kanee, Hana
    Berumen, Michael L. cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Marine Science Program
    Plant Science
    Red Sea Research Center (RSRC)
    Date
    2017-05-19
    Online Publication Date
    2017-05-19
    Print Publication Date
    2017-12
    Permanent link to this record
    http://hdl.handle.net/10754/623704
    
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    Abstract
    The biodiversity of the Red Sea remains relatively understudied, particularly for invertebrate taxa. Documenting present patterns of biodiversity is essential for better understanding Red Sea reef ecosystems and how these ecosystems may be impacted by stressors (such as fishing and climate change). Several species of giant clams (genus Tridacna) are reported from the Red Sea, although the majority of research effort has occurred in the Gulf of Aqaba. We investigated the genetic diversity (16S rDNA) of the Tridacna species found in the central Saudi Arabian Red Sea. We also investigated the genetic diversity (ITS rDNA) of symbiotic dinoflagellates Symbiodinium associated with these clams. Samples were collected from nine reefs on a cross-shelf gradient near Thuwal, Saudi Arabia. Two species, T. squamosa and T. maxima, were recorded, with the latter being the most abundant. Tridacna squamosina, a species recently reported in the northern Red Sea, was not found, suggesting that this species is not present or is very rare in our study region. All tridacnids sampled were found to harbor Symbiodinium grouped in Clade A, considered an opportunistic, heat-tolerant symbiont group in anemones and corals. The consistent association with Clade A Symbiodinium in central Red Sea tridacnids may reflect the consequence of adaptation to the relatively extreme conditions of the Red Sea. This study contributes to an ever-growing catalog of Red Sea biodiversity and serves as important baseline information for a region experiencing dynamic pressures.
    Citation
    Pappas MK, He S, Hardenstine RS, Kanee H, Berumen ML (2017) Genetic diversity of giant clams (Tridacna spp.) and their associated Symbiodinium in the central Red Sea. Marine Biodiversity. Available: http://dx.doi.org/10.1007/s12526-017-0715-2.
    Sponsors
    This work was made possible with support from the King Abdullah University of Science and Technology (KAUST) Visiting Student Research Program and the Red Sea Research Center. For assistance with field sampling, we thank A. Monroe, N. Kandler, M. Wooster, S. Wilson, M. Emms, and F. Gizzi. Logistical support was provided by the KAUST Coastal and Marine Resources Core Lab and members of the Reef Ecology Lab. For assistance with lab work, data analysis, and figure preparation, we gratefully acknowledge the assistance from R. Arrigoni and T. Sinclair-Taylor. Funding for this work was provided by KAUST (baseline research funds to MLB).
    Publisher
    Springer Nature
    Journal
    Marine Biodiversity
    DOI
    10.1007/s12526-017-0715-2
    Additional Links
    http://link.springer.com/article/10.1007/s12526-017-0715-2
    ae974a485f413a2113503eed53cd6c53
    10.1007/s12526-017-0715-2
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Red Sea Research Center (RSRC); Marine Science Program

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