• Login
    View Item 
    •   DSpace Home
    • Institute's contributions
    • Scholarly literature
    • View Item
    •   DSpace Home
    • Institute's contributions
    • Scholarly literature
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Response of a natural Phytoplankton community from the Qingdao coast (Yellow Sea, China) to variable CO<sub>2</sub> levels over a short-term incubation experiment

    Thumbnail
    View/Open
    Curr_Sci_108_1901.pdf (1.954Mb)
    Date
    2015
    Author
    Biswas, H.
    Jie, J.
    Li, Y.
    Zhang, G.
    Zhu, Z.-Y.
    Wu, Y.
    Zhang, G.-L.
    Li, Y.-W.
    Liu, S.M.
    Zhang, J.
    Metadata
    Show full item record
    Abstract
    Since marine phytoplankton play a vital role in stabilizing earth’s climate by removing significant amount of atmospheric CO<sub>2</sub>, their responses to increasing CO<sub>2</sub> levels are indeed vital to address. The responses of a natural phytoplankton community from the Qingdao coast (NW Yellow Sea, China) was studied under different CO<sub>2</sub> levels in microcosms. HPLC pigment analysis revealed the presence of diatoms as a dominant microalgal group; however, members of chlorophytes, prasinophytes, cryptophytes and cyanophytes were also present. δ<Sup>13</sup>C<sub>POM</sub> values indicated that the phytoplankton community probably utilized bicarbonate ions as dissolved inorganic carbon source through a carbon concentration mechanism (CCM) under low CO<sub>2</sub> levels, and diffusive CO<sub>2</sub> uptake increased upon the increase of external CO<sub>2</sub> levels. Although, considerable increase in phytoplankton biomass was noticed in all CO<sub>2</sub> treatments, CO<sub>2</sub>-induced effects were absent. Higher net nitrogen uptake under low CO<sub>2</sub> levels could be related to the synthesis of CCM components. Flow cytometry analysis showed slight reduction in the abundance of Synechococcus and pico-eukaryotes under the high CO<sub>2</sub> treatments. Diatoms did not show any negative impact in response to increasing CO<sub>2</sub> levels; however, chlorophytes revealed a reverse tend. Heterotrophic bacterial count enhanced with increasing CO<sub>2</sub> levels and indicated higher abundance of labile organic carbon. Thus, the present study indicates that any change in dissolved CO<sub>2</sub> concentrations in this area may affect phytoplankton physiology and community structure and needs further long-term study.
    URI
    http://drs.nio.org/drs/handle/2264/4769
    Collections
    • Scholarly literature [9211]

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV
     

     

    Browse

    All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV