Changes in primary productivity and impacts in fisheries

George, Grinson (2017) Changes in primary productivity and impacts in fisheries. In: Winter School on Structure and Function of the Marine Ecosystem : Fisheries, 1-21 December 2017, Kochi.

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    Abstract

    Fixation of inorganic carbon to organic carbon in the ocean is driven purely by phytoplankton. Phytoplankton carbon fixation plays an important role in maintaining the quasi-steady state level of atmospheric CO2. Relative contribution of marine primary productivity to global photosynthetic production is between 10 and 50 percent. The magnitude ranges from 20 to 55 Gt of C/ year (Ryther, 1969; Walsh, 1984; Martin 1992). Ocean-atmospheric coupled climate models predict changes in the ocean circulation and hypothesize that changes in the ocean circulation will stimulate phytoplankton biomass production in the nutrient depleted areas in the open ocean (Roemmich and Wunsch, 1985). The effect on atmospheric CO2 is uncertain because the relationship between the enhanced primary production and air-sea exchange of CO2 is not understood. The challenge is to study the magnitude and variability of primary productivity, its time scales and changes in atmospheric forcing and upscale it into secondary and tertiary productivity.

    Item Type: Conference or Workshop Item (Paper)
    Subjects: Marine Environment > Primary Production
    Divisions: CMFRI-Kochi > Marine Capture > Fishery Resource Assessment
    Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Fishery Resource Assessment
    CMFRI-Kochi > Marine Capture > Fishery Resource Assessment
    Subject Area > CMFRI-Kochi > Marine Capture > Fishery Resource Assessment
    Depositing User: Arun Surendran
    Date Deposited: 28 May 2018 09:20
    Last Modified: 28 May 2018 09:20
    URI: http://eprints.cmfri.org.in/id/eprint/12766

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