Effects of Copper on Silicic Acid Uptake by a Marine Phytoplankton Population: Controlled Ecosystem Pollution Experiment

Authors: Goering, J.J.; Boisseau, D.; Hattori, A.

Source: Bulletin of Marine Science, Volume 27, Number 1, January 1977 , pp. 58-65(8)

Publisher: University of Miami - Rosenstiel School of Marine and Atmospheric Science

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Abstract:

Stable isotope tracer techniques were used to examine the effect of copper on silicic acid uptake by natural populations of marine phytoplankton. Short term exposures (1-6 days) of phytoplankton to four levels of added copper, 2.5, 5.0, 10.0, and 25.0 μg/l were studied. Copper additions, in general, inhibited uptake when compared to controls with the greatest effect at 25 μg/l copper. Uptakes at this copper concentration ranged from 49-98% of the control with a mean of 61% and many values near 50%.

The estimated rates of dissolution of silica from phytoplankton cell walls in the presence or absence of copper were low. This implies that exposure of siliceous phytoplankton to copper up to 25 μg/l does not greatly alter their dissolution rate.

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Document Type: Research article

Publication date: 1977-01-01

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