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VICTORIA LÓPEZ-RODAS Y COLS. AN. R. ACAD. NAC. FARM.

Toxin-producing microalgae (i.e. okadaic acid producing
dinoflagellate Prorocentrum lima; domoic acid producing diatom
Pseudonizchia pungens) and other harmful microalgae (i.e.
Crysochromulina) were also found attached to the bottoms of the
sampled ships.

Figure 2. Example of algae of biofouling recovering the underwater body of
ships. A. Early stage of Fucus (Phaeophyta); B. Tetraselmis sp. (Chlorophyta);
C. DSP toxic dinoflagellate Prorocentrum lima (okadaic acid producing); D. penna-
te diatoms (Pseudonitzschia sp).

3.2. Toxic effect of TBT on cells of Dc1M

TBT was extremely toxic for Dc1M cells of wild-type genotype.
Growth of Dc1M cells was irreversible inhibited by TBT concentra-
tions of 10 ppm. Monitoring changes in photosynthetic performance
also assessed the toxic effect of TBT. Only 10 ppm TBT were able
to inhibit 79,51% of FPSII whereas 30 ppm TBT totally inhibited
photosynthesis.

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