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    Impact of Crab Bioturbation on Nitrogen-Fixation Rates in Red Sea Mangrove Sediment

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    MS+Thesis_Maryam+Qashqari_Summer+2017.pdf
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    Description:
    MS Thesis - Maryam Qashqari
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    Type
    Thesis
    Authors
    Qashqari, Maryam S.
    Advisors
    Duarte, Carlos M. cc
    Committee members
    Daffonchio, Daniele cc
    Agusti, Susana cc
    Program
    Bioscience
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Date
    2017-05
    Embargo End Date
    2018-06-08
    Permanent link to this record
    http://hdl.handle.net/10754/624893
    
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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 2018-06-08.
    Abstract
    Mangrove plants are a productive ecosystem that provide several benefits for marine organisms and industry. They are considered to be a food source and habitat for many organisms. However, mangrove growth is limited by nutrient availability. According to some recent studies, the dwarfism of the mangrove plants is due to the limitation of nitrogen in the environment. Biological nitrogen fixation is the process by which atmospheric nitrogen is fixed into ammonium. Then, this fixed nitrogen can be uptaken by plants. Hence, biological nitrogen fixation increases the input of nitrogen in the mangrove ecosystem. In this project, we focus on measuring the rates of nitrogen fixation on Red Sea mangrove (Avicennia marina) located at Thuwal, Saudi Arabia. The nitrogen fixation rates are calculated by the acetylene reduction assay. The experimental setup will allow us to analyze the effect of crab bioturbation on nitrogen fixing rates. This study will help to better understand the nitrogen dynamics in mangrove ecosystems in Saudi Arabia. Furthermore, this study points out the importance of the sediment microbial community in mangrove trees development. Finally, the role of nitrogen fixing bacteria should be taken in account for future restoration activities.
    Citation
    Qashqari, M. S. (2017). Impact of Crab Bioturbation on Nitrogen-Fixation Rates in Red Sea Mangrove Sediment. KAUST Research Repository. https://doi.org/10.25781/KAUST-46I55
    DOI
    10.25781/KAUST-46I55
    ae974a485f413a2113503eed53cd6c53
    10.25781/KAUST-46I55
    Scopus Count
    Collections
    Biological and Environmental Sciences and Engineering (BESE) Division; Bioscience Program; Theses; Theses

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