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    Climate warming and interannual variability of phytoplankton phenology in the Northern Red Sea

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    John Gittings Thesis.pdf
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    Description:
    John Gittings Thesis
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    Type
    Thesis
    Authors
    Gittings, John cc
    Advisors
    Hoteit, Ibrahim cc
    Committee members
    Jones, Burton cc
    Berumen, Michael L. cc
    Raitsos, Dionysios
    Program
    Marine Science
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Date
    2016-12
    Embargo End Date
    2017-12-05
    Permanent link to this record
    http://hdl.handle.net/10754/621940
    
    Metadata
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    Access Restrictions
    At the time of archiving, the student author of this thesis opted to temporarily restrict access to it. The full text of this thesis became available to the public after the expiration of the embargo on 2017-12-05.
    Abstract
    In agreement with global patterns of climate change and increasing temperatures in the tropical oceans, the Northern Red Sea (NRS) has been warming over the last few decades. Using 18 years of remotely-sensed chlorophyll-a data (Chl-a, an index of phytoplankton biomass), we investigate the potential impacts of climate warming on phytoplankton abundance and phenology in the Northern Red Sea by exploring the mechanistic links with the regional physical environment. The results of the analysis reveal that, in accordance with other tropical ecosystems, phytoplankton biomass in the NRS will decrease in response to warmer climate scenarios. This is attributed to lower heat fluxes (heat loss to the atmosphere) during the bloom period, and enhanced vertical stratification, which prevents vertical mixing of nutrients into the euphotic layer. In addition, we show that during warmer conditions (when heat fluxes are weakened), the winter bloom initiates significantly later (by up to 10 weeks) and its duration is considerably reduced. The biological implications of alterations to phytoplankton phenology may include increased larval mortality of pelagic species, reduced recruitment, fisheries impacts and changes to community structure.
    Citation
    Gittings, J. (2016). Climate warming and interannual variability of phytoplankton phenology in the Northern Red Sea. KAUST Research Repository. https://doi.org/10.25781/KAUST-58526
    DOI
    10.25781/KAUST-58526
    ae974a485f413a2113503eed53cd6c53
    10.25781/KAUST-58526
    Scopus Count
    Collections
    Biological and Environmental Sciences and Engineering (BESE) Division; Marine Science Program; Theses; Theses

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