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    PAHs sensitivity of picophytoplankton populations in the Red Sea

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    Kottuparambil & Agusti_2018.pdf
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    Type
    Article
    Authors
    Kottuparambil, Sreejith
    Agusti, Susana cc
    KAUST Department
    Red Sea Research Center (RSRC)
    Biological and Environmental Sciences and Engineering (BESE) Division
    Marine Science Program
    Date
    2018-04-25
    Online Publication Date
    2018-04-25
    Print Publication Date
    2018-08
    Permanent link to this record
    http://hdl.handle.net/10754/627739
    
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    Abstract
    In this study, we investigated the in situ responses of Red Sea picophytoplankton, the dominant phytoplankton group in the oligotrophic ocean, to two toxic polycyclic aromatic hydrocarbons (PAHs), phenanthrene and pyrene. The experiments were conducted across a latitudinal gradient of the Saudi Arabian Red Sea, an area sensitive to oil pollution. We observed significant adverse effects on the growth and abundance of the picocyanobacteria Synechococcus and picoeukaryotes, at all stations sampled. Prochlorococcus, which was abundant only at one of the stations, also appeared to be affected. Pyrene was found to be more toxic to phytoplankton at all stations. In general, picoeukaryotes exhibited higher sensitivity to PAHs than Synechococcus. Populations in the highly oligotrophic Northern region of the Red Sea were more tolerant to PAHs, presumably influenced by the natural selection of more resistant strains of phytoplankton due to the prolonged exposure to PAHs. Toxicity threshold values estimated here are higher than those reported for picophytoplankton from other oligotrophic marine waters and exceed by far the natural levels of PAHs in many oceans. Our findings reveal a possible adaptation of picophytoplankton populations to oil-related contaminants, which may clearly influence their spatial distribution patterns in the Red Sea.
    Citation
    Kottuparambil S, Agusti S (2018) PAHs sensitivity of picophytoplankton populations in the Red Sea. Environmental Pollution 239: 607–616. Available: http://dx.doi.org/10.1016/j.envpol.2018.04.079.
    Sponsors
    This work was supported by the King Abdullah University of Science and Technology (KAUST). We are grateful to the Coastal and Marine Resources Core Lab (CMOR), KAUST and the R/V Thuwal crew for their help during the sampling procedures.
    Publisher
    Elsevier BV
    Journal
    Environmental Pollution
    DOI
    10.1016/j.envpol.2018.04.079
    PubMed ID
    29704673
    Additional Links
    https://www.sciencedirect.com/science/article/pii/S0269749118305463
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.envpol.2018.04.079
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Red Sea Research Center (RSRC); Marine Science Program

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