Intraspecific variations in responses to ocean acidification in two branching coral species

Ayami Sekizawa, Hikaru Uechi, Akira Iguchi, Takashi Nakamura, Naoki H. Kumagai, Atsushi Suzuki, Kazuhiko Sakai, Yukihiro Nojiri

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)

    Abstract

    Ocean acidification is widely recognised to have a negative impact on marine calcifying organisms by reducing calcifications, but controversy remains over whether such organisms could cope with ocean acidification within a range of phenotypic plasticity and/or adapt to future acidifying ocean. We performed a laboratory rearing experiment using clonal fragments of the common branching corals Montipora digitata and Porites cylindrica under control and acidified seawater (lower pH) conditions (approximately 400 and 900 μatm pCO2, respectively) and evaluated the intraspecific variations in their responses to ocean acidification. Intra- and interspecific variations in calcification and photosynthetic efficiency were evident according to both pCO2 conditions and colony, indicating that responses to acidification may be individually variable at the colony level. Our results suggest that some corals may cope with ocean acidification within their present genotypic composition by adaptation through phenotypic plasticity, while others may be placed under selective pressures resulting in population alteration.

    Original languageEnglish
    Pages (from-to)282-287
    Number of pages6
    JournalMarine Pollution Bulletin
    Volume122
    Issue number1-2
    DOIs
    Publication statusPublished - 2017

    Keywords

    • Adaptation
    • Coral
    • Ocean acidification
    • Phenotypic plasticity

    ASJC Scopus subject areas

    • Oceanography
    • Aquatic Science
    • Pollution

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