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Some influences of the Columbia River effluent on marine phytoplankton during january 1961
Hobson, L.A. (1966). Some influences of the Columbia River effluent on marine phytoplankton during january 1961. Limnol. Oceanogr. 11(2): 223-234
In: Limnology and Oceanography. American Society of Limnology and Oceanography: Waco, Tex., etc.. ISSN 0024-3590, more
Peer reviewed article  

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Keywords
    Community composition; Environmental factors; Nutrient cycles; Overwintering; Phytoplankton; River discharge; Marine

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  • Hobson, L.A.

Abstract
    The distribution of the phytoplankton standing crop along the coasts of Oregon and Washington during January 1961 is described and attempts to evaluate the influences of freshwater runoff on the marine phytoplankton are made. Marine diatoms and microflagellate concentratio,ns are larger in the Columbia River plume than in the ambient water. Inshore, transition, and offshore spccics assemblages are present. Silicate, nitrate, and phosphate concentrations are adequate to support phytoplankton growth in the three arcas. Surface stability and critical-to-mixed-depth ratios are much larger in the plume than in the oceanic water. There is a correlation between the critical-to-mixed-depth ratios and the size of the phytoplankton standing crop. It is concluded that the freshwater runoff increases the area in which a neritic diatom flora could exist in winter.

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